Delete old chromedriver code, and remove mongoose webserver.

third_party/mongoose/mongoose.c

-// Copyright (c) 2004-2011 Sergey Lyubka
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-#if defined(_WIN32)
-#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005
-#else
-#define _XOPEN_SOURCE 600 // For flockfile() on Linux
-#define _LARGEFILE_SOURCE // Enable 64-bit file offsets
-#ifndef __STDC_FORMAT_MACROS
-#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
-#endif // __STDC_FORMAT_MACROS
-#endif
-
-#if defined(__SYMBIAN32__)
-#define NO_SSL // SSL is not supported
-#define NO_CGI // CGI is not supported
-#define PATH_MAX FILENAME_MAX
-#endif // __SYMBIAN32__
-
-#ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <signal.h>
-#include <fcntl.h>
-#endif // !_WIN32_WCE
-
-#include <time.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <assert.h>
-#include <string.h>
-#include <ctype.h>
-#include <limits.h>
-#include <stddef.h>
-#include <stdio.h>
-
-#if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific
-  #ifdef _WIN32_WINNT
-    #undef _WIN32_WINNT
-  #endif
-#define _WIN32_WINNT 0x0400 // To make it link in VS2005
-#include <windows.h>
-#include <winsock2.h>
-
-#ifndef PATH_MAX
-#define PATH_MAX MAX_PATH
-#endif
-
-#ifndef _WIN32_WCE
-#include <process.h>
-#include <direct.h>
-#include <io.h>
-#else // _WIN32_WCE
-#define NO_CGI // WinCE has no pipes
-
-typedef long off_t;
-#define BUFSIZ  4096
-
-#define errno   GetLastError()
-#define strerror(x)  _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
-#endif // _WIN32_WCE
-
-#define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
-      ((uint64_t)((uint32_t)(hi))) << 32))
-#define RATE_DIFF 10000000 // 100 nsecs
-#define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
-#define SYS2UNIX_TIME(lo, hi) \
-  (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
-
-// Visual Studio 6 does not know __func__ or __FUNCTION__
-// The rest of MS compilers use __FUNCTION__, not C99 __func__
-// Also use _strtoui64 on modern M$ compilers
-#if defined(_MSC_VER) && _MSC_VER < 1300
-#define STRX(x) #x
-#define STR(x) STRX(x)
-#define __func__ "line " STR(__LINE__)
-#define strtoull(x, y, z) strtoul(x, y, z)
-#define strtoll(x, y, z) strtol(x, y, z)
-#else
-#define __func__  __FUNCTION__
-#define strtoull(x, y, z) _strtoui64(x, y, z)
-#define strtoll(x, y, z) _strtoi64(x, y, z)
-#endif // _MSC_VER
-
-#define ERRNO   GetLastError()
-#define NO_SOCKLEN_T
-#define SSL_LIB   "ssleay32.dll"
-#define CRYPTO_LIB  "libeay32.dll"
-#define DIRSEP '\\'
-#define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\')
-#define O_NONBLOCK  0
-#if !defined(EWOULDBLOCK)
-#define EWOULDBLOCK  WSAEWOULDBLOCK
-#endif // !EWOULDBLOCK
-#define _POSIX_
-#define INT64_FMT  "I64d"
-
-#define WINCDECL __cdecl
-#define SHUT_WR 1
-#define snprintf _snprintf
-#define vsnprintf _vsnprintf
-#define sleep(x) Sleep((x) * 1000)
-
-#define pipe(x) _pipe(x, BUFSIZ, _O_BINARY)
-#define popen(x, y) _popen(x, y)
-#define pclose(x) _pclose(x)
-#define close(x) _close(x)
-#define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
-#define RTLD_LAZY  0
-#define fseeko(x, y, z) fseek((x), (y), (z))
-#define fdopen(x, y) _fdopen((x), (y))
-#define write(x, y, z) _write((x), (y), (unsigned) z)
-#define read(x, y, z) _read((x), (y), (unsigned) z)
-#define flockfile(x) (void) 0
-#define funlockfile(x) (void) 0
-
-#if !defined(fileno)
-#define fileno(x) _fileno(x)
-#endif // !fileno MINGW #defines fileno
-
-typedef HANDLE pthread_mutex_t;
-typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
-typedef DWORD pthread_t;
-#define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
-
-struct timespec {
-  long tv_nsec;
-  long tv_sec;
-};
-
-static int pthread_mutex_lock(pthread_mutex_t *);
-static int pthread_mutex_unlock(pthread_mutex_t *);
-static FILE *mg_fopen(const char *path, const char *mode);
-
-#if defined(HAVE_STDINT)
-#include <stdint.h>
-#else
-typedef unsigned int  uint32_t;
-typedef unsigned short  uint16_t;
-typedef unsigned __int64 uint64_t;
-typedef __int64   int64_t;
-#define INT64_MAX  9223372036854775807
-#endif // HAVE_STDINT
-
-// POSIX dirent interface
-struct dirent {
-  char d_name[PATH_MAX];
-};
-
-typedef struct DIR {
-  HANDLE   handle;
-  WIN32_FIND_DATAW info;
-  struct dirent  result;
-} DIR;
-
-#else    // UNIX  specific
-#include <sys/wait.h>
-#include <sys/socket.h>
-#include <sys/select.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <sys/time.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <netdb.h>
-
-#include <pwd.h>
-#include <unistd.h>
-#include <dirent.h>
-#if !defined(NO_SSL_DL) && !defined(NO_SSL)
-#include <dlfcn.h>
-#endif
-#include <pthread.h>
-#if defined(__MACH__)
-#define SSL_LIB   "libssl.dylib"
-#define CRYPTO_LIB  "libcrypto.dylib"
-#else
-#if !defined(SSL_LIB)
-#define SSL_LIB   "libssl.so"
-#endif
-#if !defined(CRYPTO_LIB)
-#define CRYPTO_LIB  "libcrypto.so"
-#endif
-#endif
-#define DIRSEP   '/'
-#define IS_DIRSEP_CHAR(c) ((c) == '/')
-#ifndef O_BINARY
-#define O_BINARY  0
-#endif // O_BINARY
-#define closesocket(a) close(a)
-#define mg_fopen(x, y) fopen(x, y)
-#define mg_mkdir(x, y) mkdir(x, y)
-#define mg_remove(x) remove(x)
-#define mg_rename(x, y) rename(x, y)
-#define ERRNO errno
-#define INVALID_SOCKET (-1)
-#define INT64_FMT PRId64
-typedef int SOCKET;
-#define WINCDECL
-
-#endif // End of Windows and UNIX specific includes
-
-#include "mongoose.h"
-
-#define MONGOOSE_VERSION "3.1"
-#define PASSWORDS_FILE_NAME ".htpasswd"
-#define CGI_ENVIRONMENT_SIZE 4096
-#define MAX_CGI_ENVIR_VARS 64
-#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
-
-#ifdef _WIN32
-static pthread_t pthread_self(void) {
-  return GetCurrentThreadId();
-}
-#endif // _WIN32
-
-#if defined(DEBUG)
-#define DEBUG_TRACE(x) do { \
-  flockfile(stdout); \
-  printf("*** %lu.%p.%s.%d: ", \
-         (unsigned long) time(NULL), (void *) pthread_self(), \
-         __func__, __LINE__); \
-  printf x; \
-  putchar('\n'); \
-  fflush(stdout); \
-  funlockfile(stdout); \
-} while (0)
-#else
-#define DEBUG_TRACE(x)
-#endif // DEBUG
-
-// Darwin prior to 7.0 and Win32 do not have socklen_t
-#ifdef NO_SOCKLEN_T
-typedef int socklen_t;
-#endif // NO_SOCKLEN_T
-
-typedef void * (*mg_thread_func_t)(void *);
-
-static const char *http_500_error = "Internal Server Error";
-
-// Snatched from OpenSSL includes. I put the prototypes here to be independent
-// from the OpenSSL source installation. Having this, mongoose + SSL can be
-// built on any system with binary SSL libraries installed.
-typedef struct ssl_st SSL;
-typedef struct ssl_method_st SSL_METHOD;
-typedef struct ssl_ctx_st SSL_CTX;
-
-#define SSL_ERROR_WANT_READ 2
-#define SSL_ERROR_WANT_WRITE 3
-#define SSL_FILETYPE_PEM 1
-#define CRYPTO_LOCK  1
-
-#if defined(NO_SSL_DL)
-extern void SSL_free(SSL *);
-extern int SSL_accept(SSL *);
-extern int SSL_connect(SSL *);
-extern int SSL_read(SSL *, void *, int);
-extern int SSL_write(SSL *, const void *, int);
-extern int SSL_get_error(const SSL *, int);
-extern int SSL_set_fd(SSL *, int);
-extern SSL *SSL_new(SSL_CTX *);
-extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
-extern SSL_METHOD *SSLv23_server_method(void);
-extern int SSL_library_init(void);
-extern void SSL_load_error_strings(void);
-extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
-extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
-extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
-extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
-extern void SSL_CTX_free(SSL_CTX *);
-extern unsigned long ERR_get_error(void);
-extern char *ERR_error_string(unsigned long, char *);
-extern int CRYPTO_num_locks(void);
-extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
-extern void CRYPTO_set_id_callback(unsigned long (*)(void));
-#else
-// Dynamically loaded SSL functionality
-struct ssl_func {
-  const char *name;   // SSL function name
-  void  (*ptr)(void); // Function pointer
-};
-
-#define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
-#define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
-#define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
-#define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
-#define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
-#define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr)
-#define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
-#define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
-#define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
-#define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
-#define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
-#define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
-        const char *, int)) ssl_sw[11].ptr)
-#define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
-        const char *, int)) ssl_sw[12].ptr)
-#define SSL_CTX_set_default_passwd_cb \
-  (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
-#define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
-#define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
-#define SSL_CTX_use_certificate_chain_file \
-  (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
-
-#define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
-#define CRYPTO_set_locking_callback \
-  (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
-#define CRYPTO_set_id_callback \
-  (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
-#define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr)
-#define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr)
-
-// set_ssl_option() function updates this array.
-// It loads SSL library dynamically and changes NULLs to the actual addresses
-// of respective functions. The macros above (like SSL_connect()) are really
-// just calling these functions indirectly via the pointer.
-static struct ssl_func ssl_sw[] = {
-  {"SSL_free",   NULL},
-  {"SSL_accept",   NULL},
-  {"SSL_connect",   NULL},
-  {"SSL_read",   NULL},
-  {"SSL_write",   NULL},
-  {"SSL_get_error",  NULL},
-  {"SSL_set_fd",   NULL},
-  {"SSL_new",   NULL},
-  {"SSL_CTX_new",   NULL},
-  {"SSLv23_server_method", NULL},
-  {"SSL_library_init",  NULL},
-  {"SSL_CTX_use_PrivateKey_file", NULL},
-  {"SSL_CTX_use_certificate_file",NULL},
-  {"SSL_CTX_set_default_passwd_cb",NULL},
-  {"SSL_CTX_free",  NULL},
-  {"SSL_load_error_strings", NULL},
-  {"SSL_CTX_use_certificate_chain_file", NULL},
-  {NULL,    NULL}
-};
-
-// Similar array as ssl_sw. These functions could be located in different lib.
-static struct ssl_func crypto_sw[] = {
-  {"CRYPTO_num_locks",  NULL},
-  {"CRYPTO_set_locking_callback", NULL},
-  {"CRYPTO_set_id_callback", NULL},
-  {"ERR_get_error",  NULL},
-  {"ERR_error_string", NULL},
-  {NULL,    NULL}
-};
-#endif // NO_SSL_DL
-
-static const char *month_names[] = {
-  "Jan", "Feb", "Mar", "Apr", "May", "Jun",
-  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
-};
-
-// Unified socket address. For IPv6 support, add IPv6 address structure
-// in the union u.
-struct usa {
-  socklen_t len;
-  union {
-    struct sockaddr sa;
-    struct sockaddr_in sin;
-  } u;
-};
-
-// Describes a string (chunk of memory).
-struct vec {
-  const char *ptr;
-  size_t len;
-};
-
-// Structure used by mg_stat() function. Uses 64 bit file length.
-struct mgstat {
-  int is_directory;  // Directory marker
-  int64_t size;      // File size
-  time_t mtime;      // Modification time
-};
-
-// Describes listening socket, or socket which was accept()-ed by the master
-// thread and queued for future handling by the worker thread.
-struct socket {
-  struct socket *next;  // Linkage
-  SOCKET sock;          // Listening socket
-  struct usa lsa;       // Local socket address
-  struct usa rsa;       // Remote socket address
-  int is_ssl;           // Is socket SSL-ed
-  int is_proxy;
-};
-
-enum {
-  CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
-  PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE,
-  SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
-  GLOBAL_PASSWORDS_FILE, INDEX_FILES,
-  ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE,
-  EXTRA_MIME_TYPES, LISTENING_PORTS,
-  DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER,
-  NUM_OPTIONS
-};
-
-static const char *config_options[] = {
-  "C", "cgi_extensions", ".cgi,.pl,.php",
-  "E", "cgi_environment", NULL,
-  "G", "put_delete_passwords_file", NULL,
-  "I", "cgi_interpreter", NULL,
-  "P", "protect_uri", NULL,
-  "R", "authentication_domain", "mydomain.com",
-  "S", "ssi_extensions", ".shtml,.shtm",
-  "a", "access_log_file", NULL,
-  "c", "ssl_chain_file", NULL,
-  "d", "enable_directory_listing", "yes",
-  "e", "error_log_file", NULL,
-  "g", "global_passwords_file", NULL,
-  "i", "index_files", "index.html,index.htm,index.cgi",
-  "k", "enable_keep_alive", "no",
-  "l", "access_control_list", NULL,
-  "M", "max_request_size", "16384",
-  "m", "extra_mime_types", NULL,
-  "p", "listening_ports", "8080",
-  "r", "document_root",  ".",
-  "s", "ssl_certificate", NULL,
-  "t", "num_threads", "10",
-  "u", "run_as_user", NULL,
-  NULL
-};
-#define ENTRIES_PER_CONFIG_OPTION 3
-
-struct mg_context {
-  volatile int stop_flag;       // Should we stop event loop
-  SSL_CTX *ssl_ctx;             // SSL context
-  char *config[NUM_OPTIONS];    // Mongoose configuration parameters
-  mg_callback_t user_callback;  // User-defined callback function
-  void *user_data;              // User-defined data
-
-  struct socket *listening_sockets;
-
-  volatile int num_threads;  // Number of threads
-  pthread_mutex_t mutex;     // Protects (max|num)_threads
-  pthread_cond_t  cond;      // Condvar for tracking workers terminations
-
-  struct socket queue[20];   // Accepted sockets
-  volatile int sq_head;      // Head of the socket queue
-  volatile int sq_tail;      // Tail of the socket queue
-  pthread_cond_t sq_full;    // Singaled when socket is produced
-  pthread_cond_t sq_empty;   // Signaled when socket is consumed
-};
-
-struct mg_connection {
-  struct mg_connection *peer; // Remote target in proxy mode
-  struct mg_request_info request_info;
-  struct mg_context *ctx;
-  SSL *ssl;                   // SSL descriptor
-  struct socket client;       // Connected client
-  time_t birth_time;          // Time connection was accepted
-  int64_t num_bytes_sent;     // Total bytes sent to client
-  int64_t content_len;        // Content-Length header value
-  int64_t consumed_content;   // How many bytes of content is already read
-  char *buf;                  // Buffer for received data
-  int buf_size;               // Buffer size
-  int request_len;            // Size of the request + headers in a buffer
-  int data_len;               // Total size of data in a buffer
-};
-
-const char **mg_get_valid_option_names(void) {
-  return config_options;
-}
-
-static void *call_user(struct mg_connection *conn, enum mg_event event) {
-  conn->request_info.user_data = conn->ctx->user_data;
-  return conn->ctx->user_callback == NULL ? NULL :
-    conn->ctx->user_callback(event, conn, &conn->request_info);
-}
-
-static int get_option_index(const char *name) {
-  int i;
-
-  for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
-    if (strcmp(config_options[i], name) == 0 ||
-        strcmp(config_options[i + 1], name) == 0) {
-      return i / ENTRIES_PER_CONFIG_OPTION;
-    }
-  }
-  return -1;
-}
-
-const char *mg_get_option(const struct mg_context *ctx, const char *name) {
-  int i;
-  if ((i = get_option_index(name)) == -1) {
-    return NULL;
-  } else if (ctx->config[i] == NULL) {
-    return "";
-  } else {
-    return ctx->config[i];
-  }
-}
-
-// Print error message to the opened error log stream.
-static void cry(struct mg_connection *conn, const char *fmt, ...) {
-  char buf[BUFSIZ];
-  va_list ap;
-  FILE *fp;
-  time_t timestamp;
-
-  va_start(ap, fmt);
-  (void) vsnprintf(buf, sizeof(buf), fmt, ap);
-  va_end(ap);
-
-  // Do not lock when getting the callback value, here and below.
-  // I suppose this is fine, since function cannot disappear in the
-  // same way string option can.
-  conn->request_info.log_message = buf;
-  if (call_user(conn, MG_EVENT_LOG) == NULL) {
-    fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
-      mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
-
-    if (fp != NULL) {
-      flockfile(fp);
-      timestamp = time(NULL);
-
-      (void) fprintf(fp,
-          "[%010lu] [error] [client %s] ",
-          (unsigned long) timestamp,
-          inet_ntoa(conn->client.rsa.u.sin.sin_addr));
-
-      if (conn->request_info.request_method != NULL) {
-        (void) fprintf(fp, "%s %s: ",
-            conn->request_info.request_method,
-            conn->request_info.uri);
-      }
-
-      (void) fprintf(fp, "%s", buf);
-      fputc('\n', fp);
-      funlockfile(fp);
-      if (fp != stderr) {
-        fclose(fp);
-      }
-    }
-  }
-  conn->request_info.log_message = NULL;
-}
-
-// Return OpenSSL error message
-static const char *ssl_error(void) {
-  unsigned long err;
-  err = ERR_get_error();
-  return err == 0 ? "" : ERR_error_string(err, NULL);
-}
-
-// Return fake connection structure. Used for logging, if connection
-// is not applicable at the moment of logging.
-static struct mg_connection *fc(struct mg_context *ctx) {
-  static struct mg_connection fake_connection;
-  fake_connection.ctx = ctx;
-  return &fake_connection;
-}
-
-const char *mg_version(void) {
-  return MONGOOSE_VERSION;
-}
-
-static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
-  for (; *src != '\0' && n > 1; n--) {
-    *dst++ = *src++;
-  }
-  *dst = '\0';
-}
-
-static int lowercase(const char *s) {
-  return tolower(* (const unsigned char *) s);
-}
-
-static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
-  int diff = 0;
-
-  if (len > 0)
-    do {
-      diff = lowercase(s1++) - lowercase(s2++);
-    } while (diff == 0 && s1[-1] != '\0' && --len > 0);
-
-  return diff;
-}
-
-static int mg_strcasecmp(const char *s1, const char *s2) {
-  int diff;
-
-  do {
-    diff = lowercase(s1++) - lowercase(s2++);
-  } while (diff == 0 && s1[-1] != '\0');
-
-  return diff;
-}
-
-static char * mg_strndup(const char *ptr, size_t len) {
-  char *p;
-
-  if ((p = (char *) malloc(len + 1)) != NULL) {
-    mg_strlcpy(p, ptr, len + 1);
-  }
-
-  return p;
-}
-
-static char * mg_strdup(const char *str) {
-  return mg_strndup(str, strlen(str));
-}
-
-// Like snprintf(), but never returns negative value, or the value
-// that is larger than a supplied buffer.
-// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
-// in his audit report.
-static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
-                        const char *fmt, va_list ap) {
-  int n;
-
-  if (buflen == 0)
-    return 0;
-
-  n = vsnprintf(buf, buflen, fmt, ap);
-
-  if (n < 0) {
-    cry(conn, "vsnprintf error");
-    n = 0;
-  } else if (n >= (int) buflen) {
-    cry(conn, "truncating vsnprintf buffer: [%.*s]",
-        n > 200 ? 200 : n, buf);
-    n = (int) buflen - 1;
-  }
-  buf[n] = '\0';
-
-  return n;
-}
-
-static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
-                       const char *fmt, ...) {
-  va_list ap;
-  int n;
-
-  va_start(ap, fmt);
-  n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
-  va_end(ap);
-
-  return n;
-}
-
-// Skip the characters until one of the delimiters characters found.
-// 0-terminate resulting word. Skip the delimiter and following whitespaces if any.
-// Advance pointer to buffer to the next word. Return found 0-terminated word.
-// Delimiters can be quoted with quotechar.
-static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) {
-  char *p, *begin_word, *end_word, *end_whitespace;
-
-  begin_word = *buf;
-  end_word = begin_word + strcspn(begin_word, delimiters);
-
-  // Check for quotechar
-  if (end_word > begin_word) {
-    p = end_word - 1;
-    while (*p == quotechar) {
-      // If there is anything beyond end_word, copy it
-      if (*end_word == '\0') {
-        *p = '\0';
-        break;
-      } else {
-        size_t end_off = strcspn(end_word + 1, delimiters);
-        memmove (p, end_word, end_off + 1);
-        p += end_off; // p must correspond to end_word - 1
-        end_word += end_off + 1;
-      }
-    }
-    for (p++; p < end_word; p++) {
-      *p = '\0';
-    }
-  }
-
-  if (*end_word == '\0') {
-    *buf = end_word;
-  } else {
-    end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
-
-    for (p = end_word; p < end_whitespace; p++) {
-      *p = '\0';
-    }
-
-    *buf = end_whitespace;
-  }
-
-  return begin_word;
-}
-
-// Simplified version of skip_quoted without quote char
-// and whitespace == delimiters
-static char *skip(char **buf, const char *delimiters) {
-  return skip_quoted(buf, delimiters, delimiters, 0);
-}
-
-
-// Return HTTP header value, or NULL if not found.
-static const char *get_header(const struct mg_request_info *ri,
-                              const char *name) {
-  int i;
-
-  for (i = 0; i < ri->num_headers; i++)
-    if (!mg_strcasecmp(name, ri->http_headers[i].name))
-      return ri->http_headers[i].value;
-
-  return NULL;
-}
-
-const char *mg_get_header(const struct mg_connection *conn, const char *name) {
-  return get_header(&conn->request_info, name);
-}
-
-// A helper function for traversing comma separated list of values.
-// It returns a list pointer shifted to the next value, of NULL if the end
-// of the list found.
-// Value is stored in val vector. If value has form "x=y", then eq_val
-// vector is initialized to point to the "y" part, and val vector length
-// is adjusted to point only to "x".
-static const char *next_option(const char *list, struct vec *val,
-                               struct vec *eq_val) {
-  if (list == NULL || *list == '\0') {
-    // End of the list
-    list = NULL;
-  } else {
-    val->ptr = list;
-    if ((list = strchr(val->ptr, ',')) != NULL) {
-      // Comma found. Store length and shift the list ptr
-      val->len = list - val->ptr;
-      list++;
-    } else {
-      // This value is the last one
-      list = val->ptr + strlen(val->ptr);
-      val->len = list - val->ptr;
-    }
-
-    if (eq_val != NULL) {
-      // Value has form "x=y", adjust pointers and lengths
-      // so that val points to "x", and eq_val points to "y".
-      eq_val->len = 0;
-      eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
-      if (eq_val->ptr != NULL) {
-        eq_val->ptr++;  // Skip over '=' character
-        eq_val->len = val->ptr + val->len - eq_val->ptr;
-        val->len = (eq_val->ptr - val->ptr) - 1;
-      }
-    }
-  }
-
-  return list;
-}
-
-static int match_extension(const char *path, const char *ext_list) {
-  struct vec ext_vec;
-  size_t path_len;
-
-  path_len = strlen(path);
-
-  while ((ext_list = next_option(ext_list, &ext_vec, NULL)) != NULL)
-    if (ext_vec.len < path_len &&
-        mg_strncasecmp(path + path_len - ext_vec.len,
-          ext_vec.ptr, ext_vec.len) == 0)
-      return 1;
-
-  return 0;
-}
-
-// HTTP 1.1 assumes keep alive if "Connection:" header is not set
-// This function must tolerate situations when connection info is not
-// set up, for example if request parsing failed.
-static int should_keep_alive(const struct mg_connection *conn) {
-  const char *http_version = conn->request_info.http_version;
-  const char *header = mg_get_header(conn, "Connection");
-  return (header == NULL && http_version && !strcmp(http_version, "1.1")) ||
-      (header != NULL && !mg_strcasecmp(header, "keep-alive"));
-}
-
-static const char *suggest_connection_header(const struct mg_connection *conn) {
-  return should_keep_alive(conn) ? "keep-alive" : "close";
-}
-
-static void send_http_error(struct mg_connection *conn, int status,
-                            const char *reason, const char *fmt, ...) {
-  char buf[BUFSIZ];
-  va_list ap;
-  int len;
-
-  conn->request_info.status_code = status;
-
-  if (call_user(conn, MG_HTTP_ERROR) == NULL) {
-    buf[0] = '\0';
-    len = 0;
-
-    // Errors 1xx, 204 and 304 MUST NOT send a body
-    if (status > 199 && status != 204 && status != 304) {
-      len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
-      cry(conn, "%s", buf);
-      buf[len++] = '\n';
-
-      va_start(ap, fmt);
-      len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
-      va_end(ap);
-    }
-    DEBUG_TRACE(("[%s]", buf));
-
-    mg_printf(conn, "HTTP/1.1 %d %s\r\n"
-              "Content-Type: text/plain\r\n"
-              "Content-Length: %d\r\n"
-              "Connection: %s\r\n\r\n", status, reason, len,
-              suggest_connection_header(conn));
-    conn->num_bytes_sent += mg_printf(conn, "%s", buf);
-  }
-}
-
-#if defined(_WIN32) && !defined(__SYMBIAN32__)
-static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
-  unused = NULL;
-  *mutex = CreateMutex(NULL, FALSE, NULL);
-  return *mutex == NULL ? -1 : 0;
-}
-
-static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
-  return CloseHandle(*mutex) == 0 ? -1 : 0;
-}
-
-static int pthread_mutex_lock(pthread_mutex_t *mutex) {
-  return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
-}
-
-static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
-  return ReleaseMutex(*mutex) == 0 ? -1 : 0;
-}
-
-static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
-  unused = NULL;
-  cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
-  cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
-  return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
-}
-
-static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
-  HANDLE handles[2];
-  handles[0] = cv->signal;
-  handles[1] = cv->broadcast;
-  ReleaseMutex(*mutex);
-  WaitForMultipleObjects(2, handles, FALSE, INFINITE);
-  return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
-}
-
-static int pthread_cond_signal(pthread_cond_t *cv) {
-  return SetEvent(cv->signal) == 0 ? -1 : 0;
-}
-
-static int pthread_cond_broadcast(pthread_cond_t *cv) {
-  // Implementation with PulseEvent() has race condition, see
-  // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
-  return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
-}
-
-static int pthread_cond_destroy(pthread_cond_t *cv) {
-  return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
-}
-
-// For Windows, change all slashes to backslashes in path names.
-static void change_slashes_to_backslashes(char *path) {
-  int i;
-
-  for (i = 0; path[i] != '\0'; i++) {
-    if (path[i] == '/')
-      path[i] = '\\';
-    // i > 0 check is to preserve UNC paths, like \\server\file.txt
-    if (path[i] == '\\' && i > 0)
-      while (path[i + 1] == '\\' || path[i + 1] == '/')
-        (void) memmove(path + i + 1,
-            path + i + 2, strlen(path + i + 1));
-  }
-}
-
-// Encode 'path' which is assumed UTF-8 string, into UNICODE string.
-// wbuf and wbuf_len is a target buffer and its length.
-static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
-  char buf[PATH_MAX], buf2[PATH_MAX], *p;
-
-  mg_strlcpy(buf, path, sizeof(buf));
-  change_slashes_to_backslashes(buf);
-
-  // Point p to the end of the file name
-  p = buf + strlen(buf) - 1;
-
-  // Trim trailing backslash character
-  while (p > buf && *p == '\\' && p[-1] != ':') {
-    *p-- = '\0';
-  }
-
-   // Protect from CGI code disclosure.
-   // This is very nasty hole. Windows happily opens files with
-   // some garbage in the end of file name. So fopen("a.cgi    ", "r")
-   // actually opens "a.cgi", and does not return an error!
-  if (*p == 0x20 ||               // No space at the end
-      (*p == 0x2e && p > buf) ||  // No '.' but allow '.' as full path
-      *p == 0x2b ||               // No '+'
-      (*p & ~0x7f)) {             // And generally no non-ascii chars
-    (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
-    wbuf[0] = L'\0';
-  } else {
-    // Convert to Unicode and back. If doubly-converted string does not
-    // match the original, something is fishy, reject.
-    MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
-    WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
-                        NULL, NULL);
-    if (strcmp(buf, buf2) != 0) {
-      wbuf[0] = L'\0';
-    }
-  }
-}
-
-#if defined(_WIN32_WCE)
-static time_t time(time_t *ptime) {
-  time_t t;
-  SYSTEMTIME st;
-  FILETIME ft;
-
-  GetSystemTime(&st);
-  SystemTimeToFileTime(&st, &ft);
-  t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
-
-  if (ptime != NULL) {
-    *ptime = t;
-  }
-
-  return t;
-}
-
-static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
-  int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
-  FILETIME ft, lft;
-  SYSTEMTIME st;
-  TIME_ZONE_INFORMATION tzinfo;
-
-  if (ptm == NULL) {
-    return NULL;
-  }
-
-  * (int64_t *) &ft = t;
-  FileTimeToLocalFileTime(&ft, &lft);
-  FileTimeToSystemTime(&lft, &st);
-  ptm->tm_year = st.wYear - 1900;
-  ptm->tm_mon = st.wMonth - 1;
-  ptm->tm_wday = st.wDayOfWeek;
-  ptm->tm_mday = st.wDay;
-  ptm->tm_hour = st.wHour;
-  ptm->tm_min = st.wMinute;
-  ptm->tm_sec = st.wSecond;
-  ptm->tm_yday = 0; // hope nobody uses this
-  ptm->tm_isdst =
-    GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
-
-  return ptm;
-}
-
-static struct tm *gmtime(const time_t *ptime, struct tm *ptm) {
-  // FIXME(lsm): fix this.
-  return localtime(ptime, ptm);
-}
-
-static size_t strftime(char *dst, size_t dst_size, const char *fmt,
-                       const struct tm *tm) {
-  (void) snprintf(dst, dst_size, "implement strftime() for WinCE");
-  return 0;
-}
-#endif
-
-static int mg_rename(const char* oldname, const char* newname) {
-  wchar_t woldbuf[PATH_MAX];
-  wchar_t wnewbuf[PATH_MAX];
-
-  to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
-  to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
-
-  return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
-}
-
-
-static FILE *mg_fopen(const char *path, const char *mode) {
-  wchar_t wbuf[PATH_MAX], wmode[20];
-
-  to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
-  MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
-
-  return _wfopen(wbuf, wmode);
-}
-
-static int mg_stat(const char *path, struct mgstat *stp) {
-  int ok = -1; // Error
-  wchar_t wbuf[PATH_MAX];
-  WIN32_FILE_ATTRIBUTE_DATA info;
-
-  to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
-
-  if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
-    stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
-    stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
-                               info.ftLastWriteTime.dwHighDateTime);
-    stp->is_directory =
-      info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
-    ok = 0;  // Success
-  }
-
-  return ok;
-}
-
-static int mg_remove(const char *path) {
-  wchar_t wbuf[PATH_MAX];
-  to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
-  return DeleteFileW(wbuf) ? 0 : -1;
-}
-
-static int mg_mkdir(const char *path, int mode) {
-  char buf[PATH_MAX];
-  wchar_t wbuf[PATH_MAX];
-
-  mode = 0; // Unused
-  mg_strlcpy(buf, path, sizeof(buf));
-  change_slashes_to_backslashes(buf);
-
-  (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
-
-  return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
-}
-
-// Implementation of POSIX opendir/closedir/readdir for Windows.
-static DIR * opendir(const char *name) {
-  DIR *dir = NULL;
-  wchar_t wpath[PATH_MAX];
-  DWORD attrs;
-
-  if (name == NULL) {
-    SetLastError(ERROR_BAD_ARGUMENTS);
-  } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
-    SetLastError(ERROR_NOT_ENOUGH_MEMORY);
-  } else {
-    to_unicode(name, wpath, ARRAY_SIZE(wpath));
-    attrs = GetFileAttributesW(wpath);
-    if (attrs != 0xFFFFFFFF &&
-        ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
-      (void) wcscat(wpath, L"\\*");
-      dir->handle = FindFirstFileW(wpath, &dir->info);
-      dir->result.d_name[0] = '\0';
-    } else {
-      free(dir);
-      dir = NULL;
-    }
-  }
-
-  return dir;
-}
-
-static int closedir(DIR *dir) {
-  int result = 0;
-
-  if (dir != NULL) {
-    if (dir->handle != INVALID_HANDLE_VALUE)
-      result = FindClose(dir->handle) ? 0 : -1;
-
-    free(dir);
-  } else {
-    result = -1;
-    SetLastError(ERROR_BAD_ARGUMENTS);
-  }
-
-  return result;
-}
-
-struct dirent * readdir(DIR *dir) {
-  struct dirent *result = 0;
-
-  if (dir) {
-    if (dir->handle != INVALID_HANDLE_VALUE) {
-      result = &dir->result;
-      (void) WideCharToMultiByte(CP_UTF8, 0,
-          dir->info.cFileName, -1, result->d_name,
-          sizeof(result->d_name), NULL, NULL);
-
-      if (!FindNextFileW(dir->handle, &dir->info)) {
-        (void) FindClose(dir->handle);
-        dir->handle = INVALID_HANDLE_VALUE;
-      }
-
-    } else {
-      SetLastError(ERROR_FILE_NOT_FOUND);
-    }
-  } else {
-    SetLastError(ERROR_BAD_ARGUMENTS);
-  }
-
-  return result;
-}
-
-#define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
-
-static int start_thread(struct mg_context *ctx, mg_thread_func_t f, void *p) {
-  return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0;
-}
-
-static HANDLE dlopen(const char *dll_name, int flags) {
-  wchar_t wbuf[PATH_MAX];
-  flags = 0; // Unused
-  to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
-  return LoadLibraryW(wbuf);
-}
-
-#if !defined(NO_CGI)
-#define SIGKILL 0
-static int kill(pid_t pid, int sig_num) {
-  (void) TerminateProcess(pid, sig_num);
-  (void) CloseHandle(pid);
-  return 0;
-}
-
-static pid_t spawn_process(struct mg_connection *conn, const char *prog,
-                           char *envblk, char *envp[], int fd_stdin,
-                           int fd_stdout, const char *dir) {
-  HANDLE me;
-  char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX];
-  FILE *fp;
-  STARTUPINFOA si;
-  PROCESS_INFORMATION pi;
-
-  envp = NULL; // Unused
-
-  (void) memset(&si, 0, sizeof(si));
-  (void) memset(&pi, 0, sizeof(pi));
-
-  // TODO(lsm): redirect CGI errors to the error log file
-  si.cb  = sizeof(si);
-  si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
-  si.wShowWindow = SW_HIDE;
-
-  me = GetCurrentProcess();
-  (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
-      &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
-  (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
-      &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
-
-  // If CGI file is a script, try to read the interpreter line
-  interp = conn->ctx->config[CGI_INTERPRETER];
-  if (interp == NULL) {
-    buf[2] = '\0';
-    mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog);
-    if ((fp = fopen(cmdline, "r")) != NULL) {
-      (void) fgets(buf, sizeof(buf), fp);
-      if (buf[0] != '#' || buf[1] != '!') {
-        // First line does not start with "#!". Do not set interpreter.
-        buf[2] = '\0';
-      } else {
-        // Trim whitespaces in interpreter name
-        for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) {
-          *p = '\0';
-        }
-      }
-      (void) fclose(fp);
-    }
-    interp = buf + 2;
-  }
-
-  (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s",
-                     interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog);
-
-  DEBUG_TRACE(("Running [%s]", cmdline));
-  if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
-        CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
-    cry(conn, "%s: CreateProcess(%s): %d",
-        __func__, cmdline, ERRNO);
-    pi.hProcess = (pid_t) -1;
-  } else {
-    (void) close(fd_stdin);
-    (void) close(fd_stdout);
-  }
-
-  (void) CloseHandle(si.hStdOutput);
-  (void) CloseHandle(si.hStdInput);
-  (void) CloseHandle(pi.hThread);
-
-  return (pid_t) pi.hProcess;
-}
-#endif // !NO_CGI
-
-static int set_non_blocking_mode(SOCKET sock) {
-  unsigned long on = 1;
-  return ioctlsocket(sock, FIONBIO, &on);
-}
-
-#else
-static int mg_stat(const char *path, struct mgstat *stp) {
-  struct stat st;
-  int ok;
-
-  if (stat(path, &st) == 0) {
-    ok = 0;
-    stp->size = st.st_size;
-    stp->mtime = st.st_mtime;
-    stp->is_directory = S_ISDIR(st.st_mode);
-  } else {
-    ok = -1;
-  }
-
-  return ok;
-}
-
-static void set_close_on_exec(int fd) {
-  (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
-}
-
-static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
-                        void *param) {
-  pthread_t thread_id;
-  pthread_attr_t attr;
-  int retval;
-
-  (void) pthread_attr_init(&attr);
-  (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-  // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled
-  // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5);
-
-  if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) {
-    cry(fc(ctx), "%s: %s", __func__, strerror(retval));
-  }
-
-  return retval;
-}
-
-#ifndef NO_CGI
-static pid_t spawn_process(struct mg_connection *conn, const char *prog,
-                           char *envblk, char *envp[], int fd_stdin,
-                           int fd_stdout, const char *dir) {
-  pid_t pid;
-  const char *interp;
-
-  envblk = NULL; // Unused
-
-  if ((pid = fork()) == -1) {
-    // Parent
-    send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
-  } else if (pid == 0) {
-    // Child
-    if (chdir(dir) != 0) {
-      cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
-    } else if (dup2(fd_stdin, 0) == -1) {
-      cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
-    } else if (dup2(fd_stdout, 1) == -1) {
-      cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
-    } else {
-      (void) dup2(fd_stdout, 2);
-      (void) close(fd_stdin);
-      (void) close(fd_stdout);
-
-      // Execute CGI program. No need to lock: new process
-      interp = conn->ctx->config[CGI_INTERPRETER];
-      if (interp == NULL) {
-        (void) execle(prog, prog, NULL, envp);
-        cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
-      } else {
-        (void) execle(interp, interp, prog, NULL, envp);
-        cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
-            strerror(ERRNO));
-      }
-    }
-    exit(EXIT_FAILURE);
-  } else {
-    // Parent. Close stdio descriptors
-    (void) close(fd_stdin);
-    (void) close(fd_stdout);
-  }
-
-  return pid;
-}
-#endif // !NO_CGI
-
-static int set_non_blocking_mode(SOCKET sock) {
-  int flags;
-
-  flags = fcntl(sock, F_GETFL, 0);
-  (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
-
-  return 0;
-}
-#endif // _WIN32
-
-// Write data to the IO channel - opened file descriptor, socket or SSL
-// descriptor. Return number of bytes written.
-static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
-                    int64_t len) {
-  int64_t sent;
-  int n, k;
-
-  sent = 0;
-  while (sent < len) {
-
-    // How many bytes we send in this iteration
-    k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
-
-    if (ssl != NULL) {
-      n = SSL_write(ssl, buf + sent, k);
-    } else if (fp != NULL) {
-      n = fwrite(buf + sent, 1, (size_t)k, fp);
-      if (ferror(fp))
-        n = -1;
-    } else {
-      n = send(sock, buf + sent, (size_t)k, 0);
-    }
-
-    if (n < 0)
-      break;
-
-    sent += n;
-  }
-
-  return sent;
-}
-
-// Read from IO channel - opened file descriptor, socket, or SSL descriptor.
-// Return number of bytes read.
-static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) {
-  int nread;
-
-  if (ssl != NULL) {
-    nread = SSL_read(ssl, buf, len);
-  } else if (fp != NULL) {
-    // Use read() instead of fread(), because if we're reading from the CGI
-    // pipe, fread() may block until IO buffer is filled up. We cannot afford
-    // to block and must pass all read bytes immediately to the client.
-    nread = read(fileno(fp), buf, (size_t) len);
-    if (ferror(fp))
-      nread = -1;
-  } else {
-    nread = recv(sock, buf, (size_t) len, 0);
-  }
-
-  return nread;
-}
-
-int mg_read(struct mg_connection *conn, void *buf, size_t len) {
-  int n, buffered_len, nread;
-  const char *buffered;
-
-  assert((conn->content_len == -1 && conn->consumed_content == 0) ||
-         conn->consumed_content <= conn->content_len);
-  DEBUG_TRACE(("%p %zu %lld %lld", buf, len,
-               conn->content_len, conn->consumed_content));
-  nread = 0;
-  if (conn->consumed_content < conn->content_len) {
-
-    // Adjust number of bytes to read.
-    int64_t to_read = conn->content_len - conn->consumed_content;
-    if (to_read < (int64_t) len) {
-      len = (int) to_read;
-    }
-
-    // How many bytes of data we have buffered in the request buffer?
-    buffered = conn->buf + conn->request_len + conn->consumed_content;
-    buffered_len = conn->data_len - conn->request_len;
-    assert(buffered_len >= 0);
-
-    // Return buffered data back if we haven't done that yet.
-    if (conn->consumed_content < (int64_t) buffered_len) {
-      buffered_len -= (int) conn->consumed_content;
-      if (len < (size_t) buffered_len) {
-        buffered_len = len;
-      }
-      memcpy(buf, buffered, (size_t)buffered_len);
-      len -= buffered_len;
-      buf = (char *) buf + buffered_len;
-      conn->consumed_content += buffered_len;
-      nread = buffered_len;
-    }
-
-    // We have returned all buffered data. Read new data from the remote socket.
-    while (len > 0) {
-      n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len);
-      if (n <= 0) {
-        break;
-      }
-      buf = (char *) buf + n;
-      conn->consumed_content += n;
-      nread += n;
-      len -= n;
-    }
-  }
-  return nread;
-}
-
-int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
-  return (int) push(NULL, conn->client.sock, conn->ssl,
-      (const char *) buf, (int64_t) len);
-}
-
-int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
-  char buf[BUFSIZ];
-  int len;
-  va_list ap;
-
-  va_start(ap, fmt);
-  len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap);
-  va_end(ap);
-
-  return mg_write(conn, buf, (size_t)len);
-}
-
-// URL-decode input buffer into destination buffer.
-// 0-terminate the destination buffer. Return the length of decoded data.
-// form-url-encoded data differs from URI encoding in a way that it
-// uses '+' as character for space, see RFC 1866 section 8.2.1
-// http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
-static size_t url_decode(const char *src, size_t src_len, char *dst,
-                         size_t dst_len, int is_form_url_encoded) {
-  size_t i, j;
-  int a, b;
-#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
-
-  for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
-    if (src[i] == '%' &&
-        isxdigit(* (const unsigned char *) (src + i + 1)) &&
-        isxdigit(* (const unsigned char *) (src + i + 2))) {
-      a = tolower(* (const unsigned char *) (src + i + 1));
-      b = tolower(* (const unsigned char *) (src + i + 2));
-      dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
-      i += 2;
-    } else if (is_form_url_encoded && src[i] == '+') {
-      dst[j] = ' ';
-    } else {
-      dst[j] = src[i];
-    }
-  }
-
-  dst[j] = '\0'; // Null-terminate the destination
-
-  return j;
-}
-
-// Scan given buffer and fetch the value of the given variable.
-// It can be specified in query string, or in the POST data.
-// Return NULL if the variable not found, or allocated 0-terminated value.
-// It is caller's responsibility to free the returned value.
-int mg_get_var(const char *buf, size_t buf_len, const char *name,
-               char *dst, size_t dst_len) {
-  const char *p, *e, *s;
-  size_t name_len, len;
-
-  name_len = strlen(name);
-  e = buf + buf_len;
-  len = -1;
-  dst[0] = '\0';
-
-  // buf is "var1=val1&var2=val2...". Find variable first
-  for (p = buf; p != NULL && p + name_len < e; p++) {
-    if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
-        !mg_strncasecmp(name, p, name_len)) {
-
-      // Point p to variable value
-      p += name_len + 1;
-
-      // Point s to the end of the value
-      s = (const char *) memchr(p, '&', (size_t)(e - p));
-      if (s == NULL) {
-        s = e;
-      }
-      assert(s >= p);
-
-      // Decode variable into destination buffer
-      if ((size_t) (s - p) < dst_len) {
-        len = url_decode(p, (size_t)(s - p), dst, dst_len, 1);
-      }
-      break;
-    }
-  }
-
-  return len;
-}
-
-int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
-                  char *dst, size_t dst_size) {
-  const char *s, *p, *end;
-  int name_len, len = -1;
-
-  dst[0] = '\0';
-  if ((s = mg_get_header(conn, "Cookie")) == NULL) {
-    return 0;
-  }
-
-  name_len = strlen(cookie_name);
-  end = s + strlen(s);
-
-  for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
-    if (s[name_len] == '=') {
-      s += name_len + 1;
-      if ((p = strchr(s, ' ')) == NULL)
-        p = end;
-      if (p[-1] == ';')
-        p--;
-      if (*s == '"' && p[-1] == '"' && p > s + 1) {
-        s++;
-        p--;
-      }
-      if ((size_t) (p - s) < dst_size) {
-        len = (p - s) + 1;
-        mg_strlcpy(dst, s, (size_t)len);
-      }
-      break;
-    }
-
-  return len;
-}
-
-// Mongoose allows to specify multiple directories to serve,
-// like /var/www,/~bob=/home/bob. That means that root directory depends on URI.
-// This function returns root dir for given URI.
-static int get_document_root(const struct mg_connection *conn,
-                             struct vec *document_root) {
-  const char *root, *uri;
-  int len_of_matched_uri;
-  struct vec uri_vec, path_vec;
-
-  uri = conn->request_info.uri;
-  len_of_matched_uri = 0;
-  root = next_option(conn->ctx->config[DOCUMENT_ROOT], document_root, NULL);
-
-  while ((root = next_option(root, &uri_vec, &path_vec)) != NULL) {
-    if (memcmp(uri, uri_vec.ptr, uri_vec.len) == 0) {
-      *document_root = path_vec;
-      len_of_matched_uri = uri_vec.len;
-      break;
-    }
-  }
-
-  return len_of_matched_uri;
-}
-
-static void convert_uri_to_file_name(struct mg_connection *conn,
-                                     const char *uri, char *buf,
-                                     size_t buf_len) {
-  struct vec vec;
-  int match_len;
-
-  match_len = get_document_root(conn, &vec);
-  mg_snprintf(conn, buf, buf_len, "%.*s%s", vec.len, vec.ptr, uri + match_len);
-
-#if defined(_WIN32) && !defined(__SYMBIAN32__)
-  change_slashes_to_backslashes(buf);
-#endif // _WIN32
-
-  DEBUG_TRACE(("[%s] -> [%s], [%.*s]", uri, buf, (int) vec.len, vec.ptr));
-}
-
-static int sslize(struct mg_connection *conn, int (*func)(SSL *)) {
-  return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL &&
-    SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
-    func(conn->ssl) == 1;
-}
-
-static struct mg_connection *mg_connect(struct mg_connection *conn,
-                                 const char *host, int port, int use_ssl) {
-  struct mg_connection *newconn = NULL;
-  struct sockaddr_in sin;
-  struct hostent *he;
-  int sock;
-
-  if (conn->ctx->ssl_ctx == NULL && use_ssl) {
-    cry(conn, "%s: SSL is not initialized", __func__);
-  } else if ((he = gethostbyname(host)) == NULL) {
-    cry(conn, "%s: gethostbyname(%s): %s", __func__, host, strerror(ERRNO));
-  } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
-    cry(conn, "%s: socket: %s", __func__, strerror(ERRNO));
-  } else {
-    sin.sin_family = AF_INET;
-    sin.sin_port = htons((uint16_t) port);
-    sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
-    if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
-      cry(conn, "%s: connect(%s:%d): %s", __func__, host, port,
-          strerror(ERRNO));
-      closesocket(sock);
-    } else if ((newconn = (struct mg_connection *)
-                calloc(1, sizeof(*newconn))) == NULL) {
-      cry(conn, "%s: calloc: %s", __func__, strerror(ERRNO));
-      closesocket(sock);
-    } else {
-      newconn->client.sock = sock;
-      newconn->client.rsa.u.sin = sin;
-      if (use_ssl) {
-        sslize(newconn, SSL_connect);
-      }
-    }
-  }
-
-  return newconn;
-}
-
-// Check whether full request is buffered. Return:
-//   -1  if request is malformed
-//    0  if request is not yet fully buffered
-//   >0  actual request length, including last \r\n\r\n
-static int get_request_len(const char *buf, int buflen) {
-  const char *s, *e;
-  int len = 0;
-
-  DEBUG_TRACE(("buf: %p, len: %d", buf, buflen));
-  for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
-    // Control characters are not allowed but >=128 is.
-    if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
-        *s != '\n' && * (const unsigned char *) s < 128) {
-      len = -1;
-    } else if (s[0] == '\n' && s[1] == '\n') {
-      len = (int) (s - buf) + 2;
-    } else if (s[0] == '\n' && &s[1] < e &&
-        s[1] == '\r' && s[2] == '\n') {
-      len = (int) (s - buf) + 3;
-    }
-
-  return len;
-}
-
-// Convert month to the month number. Return -1 on error, or month number
-static int get_month_index(const char *s) {
-  size_t i;
-
-  for (i = 0; i < ARRAY_SIZE(month_names); i++)
-    if (!strcmp(s, month_names[i]))
-      return (int) i;
-
-  return -1;
-}
-
-// Parse UTC date-time string, and return the corresponding time_t value.
-static time_t parse_date_string(const char *datetime) {
-  static const unsigned short days_before_month[] = {
-    0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
-  };
-  char month_str[32];
-  int second, minute, hour, day, month, year, leap_days, days;
-  time_t result = (time_t) 0;
-
-  if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
-               &day, month_str, &year, &hour, &minute, &second) == 6) ||
-       (sscanf(datetime, "%d %3s %d %d:%d:%d",
-               &day, month_str, &year, &hour, &minute, &second) == 6) ||
-       (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
-               &day, month_str, &year, &hour, &minute, &second) == 6) ||
-       (sscanf(datetime, "%d-%3s-%d %d:%d:%d",
-               &day, month_str, &year, &hour, &minute, &second) == 6)) &&
-      year > 1970 &&
-      (month = get_month_index(month_str)) != -1) {
-    year -= 1970;
-    leap_days = year / 4 - year / 100 + year / 400;
-    days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
-    result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
-  }
-
-  return result;
-}
-
-// Protect against directory disclosure attack by removing '..',
-// excessive '/' and '\' characters
-static void remove_double_dots_and_double_slashes(char *s) {
-  char *p = s;
-
-  while (*s != '\0') {
-    *p++ = *s++;
-    if (s[-1] == '/' || s[-1] == '\\') {
-      // Skip all following slashes and backslashes
-      while (*s == '/' || *s == '\\') {
-        s++;
-      }
-
-      // Skip all double-dots
-      while (*s == '.' && s[1] == '.') {
-        s += 2;
-      }
-    }
-  }
-  *p = '\0';
-}
-
-static const struct {
-  const char *extension;
-  size_t ext_len;
-  const char *mime_type;
-  size_t mime_type_len;
-} builtin_mime_types[] = {
-  {".html", 5, "text/html",   9},
-  {".htm", 4, "text/html",   9},
-  {".shtm", 5, "text/html",   9},
-  {".shtml", 6, "text/html",   9},
-  {".css", 4, "text/css",   8},
-  {".js",  3, "application/x-javascript", 24},
-  {".ico", 4, "image/x-icon",   12},
-  {".gif", 4, "image/gif",   9},
-  {".jpg", 4, "image/jpeg",   10},
-  {".jpeg", 5, "image/jpeg",   10},
-  {".png", 4, "image/png",   9},
-  {".svg", 4, "image/svg+xml",  13},
-  {".torrent", 8, "application/x-bittorrent", 24},
-  {".wav", 4, "audio/x-wav",   11},
-  {".mp3", 4, "audio/x-mp3",   11},
-  {".mid", 4, "audio/mid",   9},
-  {".m3u", 4, "audio/x-mpegurl",  15},
-  {".ram", 4, "audio/x-pn-realaudio",  20},
-  {".xml", 4, "text/xml",   8},
-  {".xslt", 5, "application/xml",  15},
-  {".ra",  3, "audio/x-pn-realaudio",  20},
-  {".doc", 4, "application/msword",  19},
-  {".exe", 4, "application/octet-stream", 24},
-  {".zip", 4, "application/x-zip-compressed", 28},
-  {".xls", 4, "application/excel",  17},
-  {".tgz", 4, "application/x-tar-gz",  20},
-  {".tar", 4, "application/x-tar",  17},
-  {".gz",  3, "application/x-gunzip",  20},
-  {".arj", 4, "application/x-arj-compressed", 28},
-  {".rar", 4, "application/x-arj-compressed", 28},
-  {".rtf", 4, "application/rtf",  15},
-  {".pdf", 4, "application/pdf",  15},
-  {".swf", 4, "application/x-shockwave-flash",29},
-  {".mpg", 4, "video/mpeg",   10},
-  {".mpeg", 5, "video/mpeg",   10},
-  {".mp4", 4, "video/mp4", 9},
-  {".m4v", 4, "video/x-m4v", 11},
-  {".asf", 4, "video/x-ms-asf",  14},
-  {".avi", 4, "video/x-msvideo",  15},
-  {".bmp", 4, "image/bmp",   9},
-  {NULL,  0, NULL,    0}
-};
-
-// Look at the "path" extension and figure what mime type it has.
-// Store mime type in the vector.
-static void get_mime_type(struct mg_context *ctx, const char *path,
-                          struct vec *vec) {
-  struct vec ext_vec, mime_vec;
-  const char *list, *ext;
-  size_t i, path_len;
-
-  path_len = strlen(path);
-
-  // Scan user-defined mime types first, in case user wants to
-  // override default mime types.
-  list = ctx->config[EXTRA_MIME_TYPES];
-  while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
-    // ext now points to the path suffix
-    ext = path + path_len - ext_vec.len;
-    if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
-      *vec = mime_vec;
-      return;
-    }
-  }
-
-  // Now scan built-in mime types
-  for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
-    ext = path + (path_len - builtin_mime_types[i].ext_len);
-    if (path_len > builtin_mime_types[i].ext_len &&
-        mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
-      vec->ptr = builtin_mime_types[i].mime_type;
-      vec->len = builtin_mime_types[i].mime_type_len;
-      return;
-    }
-  }
-
-  // Nothing found. Fall back to "text/plain"
-  vec->ptr = "text/plain";
-  vec->len = 10;
-}
-
-#ifndef HAVE_MD5
-typedef struct MD5Context {
-  uint32_t buf[4];
-  uint32_t bits[2];
-  unsigned char in[64];
-} MD5_CTX;
-
-#if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
-#define byteReverse(buf, len) // Do nothing
-#else
-static void byteReverse(unsigned char *buf, unsigned longs) {
-  uint32_t t;
-  do {
-    t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
-      ((unsigned) buf[1] << 8 | buf[0]);
-    *(uint32_t *) buf = t;
-    buf += 4;
-  } while (--longs);
-}
-#endif
-
-#define F1(x, y, z) (z ^ (x & (y ^ z)))
-#define F2(x, y, z) F1(z, x, y)
-#define F3(x, y, z) (x ^ y ^ z)
-#define F4(x, y, z) (y ^ (x | ~z))
-
-#define MD5STEP(f, w, x, y, z, data, s) \
-  ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
-
-// Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
-// initialization constants.
-static void MD5Init(MD5_CTX *ctx) {
-  ctx->buf[0] = 0x67452301;
-  ctx->buf[1] = 0xefcdab89;
-  ctx->buf[2] = 0x98badcfe;
-  ctx->buf[3] = 0x10325476;
-
-  ctx->bits[0] = 0;
-  ctx->bits[1] = 0;
-}
-
-static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
-  register uint32_t a, b, c, d;
-
-  a = buf[0];
-  b = buf[1];
-  c = buf[2];
-  d = buf[3];
-
-  MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
-  MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
-  MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
-  MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
-  MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
-  MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
-  MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
-  MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
-  MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
-  MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
-  MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
-  MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
-  MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
-  MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
-  MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
-  MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
-
-  MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
-  MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
-  MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
-  MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
-  MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
-  MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
-  MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
-  MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
-  MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
-  MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
-  MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
-  MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
-  MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
-  MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
-  MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
-  MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
-
-  MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
-  MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
-  MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
-  MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
-  MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
-  MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
-  MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
-  MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
-  MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
-  MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
-  MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
-  MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
-  MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
-  MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
-  MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
-  MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
-
-  MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
-  MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
-  MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
-  MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
-  MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
-  MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
-  MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
-  MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
-  MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
-  MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
-  MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
-  MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
-  MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
-  MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
-  MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
-  MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
-
-  buf[0] += a;
-  buf[1] += b;
-  buf[2] += c;
-  buf[3] += d;
-}
-
-static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
-  uint32_t t;
-
-  t = ctx->bits[0];
-  if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
-    ctx->bits[1]++;
-  ctx->bits[1] += len >> 29;
-
-  t = (t >> 3) & 0x3f;
-
-  if (t) {
-    unsigned char *p = (unsigned char *) ctx->in + t;
-
-    t = 64 - t;
-    if (len < t) {
-      memcpy(p, buf, len);
-      return;
-    }
-    memcpy(p, buf, t);
-    byteReverse(ctx->in, 16);
-    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-    buf += t;
-    len -= t;
-  }
-
-  while (len >= 64) {
-    memcpy(ctx->in, buf, 64);
-    byteReverse(ctx->in, 16);
-    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-    buf += 64;
-    len -= 64;
-  }
-
-  memcpy(ctx->in, buf, len);
-}
-
-static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
-  unsigned count;
-  unsigned char *p;
-
-  count = (ctx->bits[0] >> 3) & 0x3F;
-
-  p = ctx->in + count;
-  *p++ = 0x80;
-  count = 64 - 1 - count;
-  if (count < 8) {
-    memset(p, 0, count);
-    byteReverse(ctx->in, 16);
-    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-    memset(ctx->in, 0, 56);
-  } else {
-    memset(p, 0, count - 8);
-  }
-  byteReverse(ctx->in, 14);
-
-  ((uint32_t *) ctx->in)[14] = ctx->bits[0];
-  ((uint32_t *) ctx->in)[15] = ctx->bits[1];
-
-  MD5Transform(ctx->buf, (uint32_t *) ctx->in);
-  byteReverse((unsigned char *) ctx->buf, 4);
-  memcpy(digest, ctx->buf, 16);
-  memset((char *) ctx, 0, sizeof(*ctx));
-}
-#endif // !HAVE_MD5
-
-// Stringify binary data. Output buffer must be twice as big as input,
-// because each byte takes 2 bytes in string representation
-static void bin2str(char *to, const unsigned char *p, size_t len) {
-  static const char *hex = "0123456789abcdef";
-
-  for (; len--; p++) {
-    *to++ = hex[p[0] >> 4];
-    *to++ = hex[p[0] & 0x0f];
-  }
-  *to = '\0';
-}
-
-// Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes.
-void mg_md5(char *buf, ...) {
-  unsigned char hash[16];
-  const char *p;
-  va_list ap;
-  MD5_CTX ctx;
-
-  MD5Init(&ctx);
-
-  va_start(ap, buf);
-  while ((p = va_arg(ap, const char *)) != NULL) {
-    MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
-  }
-  va_end(ap);
-
-  MD5Final(hash, &ctx);
-  bin2str(buf, hash, sizeof(hash));
-}
-
-// Check the user's password, return 1 if OK
-static int check_password(const char *method, const char *ha1, const char *uri,
-                          const char *nonce, const char *nc, const char *cnonce,
-                          const char *qop, const char *response) {
-  char ha2[32 + 1], expected_response[32 + 1];
-
-  // Some of the parameters may be NULL
-  if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
-      qop == NULL || response == NULL) {
-    return 0;
-  }
-
-  // NOTE(lsm): due to a bug in MSIE, we do not compare the URI
-  // TODO(lsm): check for authentication timeout
-  if (// strcmp(dig->uri, c->ouri) != 0 ||
-      strlen(response) != 32
-      // || now - strtoul(dig->nonce, NULL, 10) > 3600
-      ) {
-    return 0;
-  }
-
-  mg_md5(ha2, method, ":", uri, NULL);
-  mg_md5(expected_response, ha1, ":", nonce, ":", nc,
-      ":", cnonce, ":", qop, ":", ha2, NULL);
-
-  return mg_strcasecmp(response, expected_response) == 0;
-}
-
-// Use the global passwords file, if specified by auth_gpass option,
-// or search for .htpasswd in the requested directory.
-static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
-  struct mg_context *ctx = conn->ctx;
-  char name[PATH_MAX];
-  const char *p, *e;
-  struct mgstat st;
-  FILE *fp;
-
-  if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
-    // Use global passwords file
-    fp =  mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
-    if (fp == NULL)
-      cry(fc(ctx), "fopen(%s): %s",
-          ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
-  } else if (!mg_stat(path, &st) && st.is_directory) {
-    (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
-        path, DIRSEP, PASSWORDS_FILE_NAME);
-    fp = mg_fopen(name, "r");
-  } else {
-     // Try to find .htpasswd in requested directory.
-    for (p = path, e = p + strlen(p) - 1; e > p; e--)
-      if (IS_DIRSEP_CHAR(*e))
-        break;
-    (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
-        (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME);
-    fp = mg_fopen(name, "r");
-  }
-
-  return fp;
-}
-
-// Parsed Authorization header
-struct ah {
-  char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
-};
-
-static int parse_auth_header(struct mg_connection *conn, char *buf,
-                             size_t buf_size, struct ah *ah) {
-  char *name, *value, *s;
-  const char *auth_header;
-
-  if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
-      mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
-    return 0;
-  }
-
-  // Make modifiable copy of the auth header
-  (void) mg_strlcpy(buf, auth_header + 7, buf_size);
-
-  s = buf;
-  (void) memset(ah, 0, sizeof(*ah));
-
-  // Parse authorization header
-  for (;;) {
-    // Gobble initial spaces
-    while (isspace(* (unsigned char *) s)) {
-      s++;
-    }
-    name = skip_quoted(&s, "=", " ", 0);
-    // Value is either quote-delimited, or ends at first comma or space.
-    if (s[0] == '\"') {
-      s++;
-      value = skip_quoted(&s, "\"", " ", '\\');
-      if (s[0] == ',') {
-        s++;
-      }
-    } else {
-      value = skip_quoted(&s, ", ", " ", 0);  // IE uses commas, FF uses spaces
-    }
-    if (*name == '\0') {
-      break;
-    }
-
-    if (!strcmp(name, "username")) {
-      ah->user = value;
-    } else if (!strcmp(name, "cnonce")) {
-      ah->cnonce = value;
-    } else if (!strcmp(name, "response")) {
-      ah->response = value;
-    } else if (!strcmp(name, "uri")) {
-      ah->uri = value;
-    } else if (!strcmp(name, "qop")) {
-      ah->qop = value;
-    } else if (!strcmp(name, "nc")) {
-      ah->nc = value;
-    } else if (!strcmp(name, "nonce")) {
-      ah->nonce = value;
-    }
-  }
-
-  // CGI needs it as REMOTE_USER
-  if (ah->user != NULL) {
-    conn->request_info.remote_user = mg_strdup(ah->user);
-  } else {
-    return 0;
-  }
-
-  return 1;
-}
-
-// Authorize against the opened passwords file. Return 1 if authorized.
-static int authorize(struct mg_connection *conn, FILE *fp) {
-  struct ah ah;
-  char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ];
-
-  if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
-    return 0;
-  }
-
-  // Loop over passwords file
-  while (fgets(line, sizeof(line), fp) != NULL) {
-    if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
-      continue;
-    }
-
-    if (!strcmp(ah.user, f_user) &&
-        !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
-      return check_password(
-            conn->request_info.request_method,
-            ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
-            ah.response);
-  }
-
-  return 0;
-}
-
-// Return 1 if request is authorised, 0 otherwise.
-static int check_authorization(struct mg_connection *conn, const char *path) {
-  FILE *fp;
-  char fname[PATH_MAX];
-  struct vec uri_vec, filename_vec;
-  const char *list;
-  int authorized;
-
-  fp = NULL;
-  authorized = 1;
-
-  list = conn->ctx->config[PROTECT_URI];
-  while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
-    if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
-      (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s",
-          filename_vec.len, filename_vec.ptr);
-      if ((fp = mg_fopen(fname, "r")) == NULL) {
-        cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
-      }
-      break;
-    }
-  }
-
-  if (fp == NULL) {
-    fp = open_auth_file(conn, path);
-  }
-
-  if (fp != NULL) {
-    authorized = authorize(conn, fp);
-    (void) fclose(fp);
-  }
-
-  return authorized;
-}
-
-static void send_authorization_request(struct mg_connection *conn) {
-  conn->request_info.status_code = 401;
-  (void) mg_printf(conn,
-      "HTTP/1.1 401 Unauthorized\r\n"
-      "Content-Length: 0\r\n"
-      "WWW-Authenticate: Digest qop=\"auth\", "
-      "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
-      conn->ctx->config[AUTHENTICATION_DOMAIN],
-      (unsigned long) time(NULL));
-}
-
-static int is_authorized_for_put(struct mg_connection *conn) {
-  FILE *fp;
-  int ret = 0;
-
-  fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
-    mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
-
-  if (fp != NULL) {
-    ret = authorize(conn, fp);
-    (void) fclose(fp);
-  }
-
-  return ret;
-}
-
-int mg_modify_passwords_file(const char *fname, const char *domain,
-                             const char *user, const char *pass) {
-  int found;
-  char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
-  FILE *fp, *fp2;
-
-  found = 0;
-  fp = fp2 = NULL;
-
-  // Regard empty password as no password - remove user record.
-  if (pass != NULL && pass[0] == '\0') {
-    pass = NULL;
-  }
-
-  (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
-
-  // Create the file if does not exist
-  if ((fp = mg_fopen(fname, "a+")) != NULL) {
-    (void) fclose(fp);
-  }
-
-  // Open the given file and temporary file
-  if ((fp = mg_fopen(fname, "r")) == NULL) {
-    return 0;
-  } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
-    fclose(fp);
-    return 0;
-  }
-
-  // Copy the stuff to temporary file
-  while (fgets(line, sizeof(line), fp) != NULL) {
-    if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
-      continue;
-    }
-
-    if (!strcmp(u, user) && !strcmp(d, domain)) {
-      found++;
-      if (pass != NULL) {
-        mg_md5(ha1, user, ":", domain, ":", pass, NULL);
-        fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
-      }
-    } else {
-      (void) fprintf(fp2, "%s", line);
-    }
-  }
-
-  // If new user, just add it
-  if (!found && pass != NULL) {
-    mg_md5(ha1, user, ":", domain, ":", pass, NULL);
-    (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
-  }
-
-  // Close files
-  (void) fclose(fp);
-  (void) fclose(fp2);
-
-  // Put the temp file in place of real file
-  (void) mg_remove(fname);
-  (void) mg_rename(tmp, fname);
-
-  return 1;
-}
-
-struct de {
-  struct mg_connection *conn;
-  char *file_name;
-  struct mgstat st;
-};
-
-static void url_encode(const char *src, char *dst, size_t dst_len) {
-  static const char *dont_escape = "._-$,;~()";
-  static const char *hex = "0123456789abcdef";
-  const char *end = dst + dst_len - 1;
-
-  for (; *src != '\0' && dst < end; src++, dst++) {
-    if (isalnum(*(const unsigned char *) src) ||
-        strchr(dont_escape, * (const unsigned char *) src) != NULL) {
-      *dst = *src;
-    } else if (dst + 2 < end) {
-      dst[0] = '%';
-      dst[1] = hex[(* (const unsigned char *) src) >> 4];
-      dst[2] = hex[(* (const unsigned char *) src) & 0xf];
-      dst += 2;
-    }
-  }
-
-  *dst = '\0';
-}
-
-static void print_dir_entry(struct de *de) {
-  char size[64], mod[64], href[PATH_MAX];
-
-  if (de->st.is_directory) {
-    (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
-  } else {
-     // We use (signed) cast below because MSVC 6 compiler cannot
-     // convert unsigned __int64 to double. Sigh.
-    if (de->st.size < 1024) {
-      (void) mg_snprintf(de->conn, size, sizeof(size),
-          "%lu", (unsigned long) de->st.size);
-    } else if (de->st.size < 1024 * 1024) {
-      (void) mg_snprintf(de->conn, size, sizeof(size),
-          "%.1fk", (double) de->st.size / 1024.0);
-    } else if (de->st.size < 1024 * 1024 * 1024) {
-      (void) mg_snprintf(de->conn, size, sizeof(size),
-          "%.1fM", (double) de->st.size / 1048576);
-    } else {
-      (void) mg_snprintf(de->conn, size, sizeof(size),
-          "%.1fG", (double) de->st.size / 1073741824);
-    }
-  }
-  (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
-  url_encode(de->file_name, href, sizeof(href));
-  de->conn->num_bytes_sent += mg_printf(de->conn,
-      "<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
-      "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
-      de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
-      de->file_name, de->st.is_directory ? "/" : "", mod, size);
-}
-
-// This function is called from send_directory() and used for
-// sorting directory entries by size, or name, or modification time.
-// On windows, __cdecl specification is needed in case if project is built
-// with __stdcall convention. qsort always requires __cdels callback.
-static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
-  const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
-  const char *query_string = a->conn->request_info.query_string;
-  int cmp_result = 0;
-
-  if (query_string == NULL) {
-    query_string = "na";
-  }
-
-  if (a->st.is_directory && !b->st.is_directory) {
-    return -1;  // Always put directories on top
-  } else if (!a->st.is_directory && b->st.is_directory) {
-    return 1;   // Always put directories on top
-  } else if (*query_string == 'n') {
-    cmp_result = strcmp(a->file_name, b->file_name);
-  } else if (*query_string == 's') {
-    cmp_result = a->st.size == b->st.size ? 0 :
-      a->st.size > b->st.size ? 1 : -1;
-  } else if (*query_string == 'd') {
-    cmp_result = a->st.mtime == b->st.mtime ? 0 :
-      a->st.mtime > b->st.mtime ? 1 : -1;
-  }
-
-  return query_string[1] == 'd' ? -cmp_result : cmp_result;
-}
-
-static int scan_directory(struct mg_connection *conn, const char *dir,
-                          void *data, void (*cb)(struct de *, void *)) {
-  char path[PATH_MAX];
-  struct dirent *dp;
-  DIR *dirp;
-  struct de de;
-
-  if ((dirp = opendir(dir)) == NULL) {
-    return 0;
-  } else {
-    de.conn = conn;
-
-    while ((dp = readdir(dirp)) != NULL) {
-      // Do not show current dir and passwords file
-      if (!strcmp(dp->d_name, ".") ||
-          !strcmp(dp->d_name, "..") ||
-          !strcmp(dp->d_name, PASSWORDS_FILE_NAME))
-        continue;
-
-      mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name);
-
-      // If we don't memset stat structure to zero, mtime will have
-      // garbage and strftime() will segfault later on in
-      // print_dir_entry(). memset is required only if mg_stat()
-      // fails. For more details, see
-      // http://code.google.com/p/mongoose/issues/detail?id=79
-      if (mg_stat(path, &de.st) != 0) {
-        memset(&de.st, 0, sizeof(de.st));
-      }
-      de.file_name = dp->d_name;
-
-      cb(&de, data);
-    }
-    (void) closedir(dirp);
-  }
-  return 1;
-}
-
-struct dir_scan_data {
-  struct de *entries;
-  int num_entries;
-  int arr_size;
-};
-
-static void dir_scan_callback(struct de *de, void *data) {
-  struct dir_scan_data *dsd = (struct dir_scan_data *) data;
-
-  if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) {
-    dsd->arr_size *= 2;
-    dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size *
-                                         sizeof(dsd->entries[0]));
-  }
-  if (dsd->entries == NULL) {
-    // TODO(lsm): propagate an error to the caller
-    dsd->num_entries = 0;
-  } else {
-    dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
-    dsd->entries[dsd->num_entries].st = de->st;
-    dsd->entries[dsd->num_entries].conn = de->conn;
-    dsd->num_entries++;
-  }
-}
-
-static void handle_directory_request(struct mg_connection *conn,
-                                     const char *dir) {
-  int i, sort_direction;
-  struct dir_scan_data data = { NULL, 0, 128 };
-
-  if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
-    send_http_error(conn, 500, "Cannot open directory",
-                    "Error: opendir(%s): %s", dir, strerror(ERRNO));
-    return;
-  }
-
-  sort_direction = conn->request_info.query_string != NULL &&
-    conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
-
-  mg_printf(conn, "%s",
-            "HTTP/1.1 200 OK\r\n"
-            "Connection: close\r\n"
-            "Content-Type: text/html; charset=utf-8\r\n\r\n");
-
-  conn->num_bytes_sent += mg_printf(conn,
-      "<html><head><title>Index of %s</title>"
-      "<style>th {text-align: left;}</style></head>"
-      "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
-      "<tr><th><a href=\"?n%c\">Name</a></th>"
-      "<th><a href=\"?d%c\">Modified</a></th>"
-      "<th><a href=\"?s%c\">Size</a></th></tr>"
-      "<tr><td colspan=\"3\"><hr></td></tr>",
-      conn->request_info.uri, conn->request_info.uri,
-      sort_direction, sort_direction, sort_direction);
-
-  // Print first entry - link to a parent directory
-  conn->num_bytes_sent += mg_printf(conn,
-      "<tr><td><a href=\"%s%s\">%s</a></td>"
-      "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
-      conn->request_info.uri, "..", "Parent directory", "-", "-");
-
-  // Sort and print directory entries
-  qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
-        compare_dir_entries);
-  for (i = 0; i < data.num_entries; i++) {
-    print_dir_entry(&data.entries[i]);
-    free(data.entries[i].file_name);
-  }
-  free(data.entries);
-
-  conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
-  conn->request_info.status_code = 200;
-}
-
-// Send len bytes from the opened file to the client.
-static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
-  char buf[BUFSIZ];
-  int to_read, num_read, num_written;
-
-  while (len > 0) {
-    // Calculate how much to read from the file in the buffer
-    to_read = sizeof(buf);
-    if ((int64_t) to_read > len)
-      to_read = (int) len;
-
-    // Read from file, exit the loop on error
-    if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0)
-      break;
-
-    // Send read bytes to the client, exit the loop on error
-    if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read)
-      break;
-
-    // Both read and were successful, adjust counters
-    conn->num_bytes_sent += num_written;
-    len -= num_written;
-  }
-}
-
-static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
-  return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
-}
-
-static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
-  strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
-}
-
-static void handle_file_request(struct mg_connection *conn, const char *path,
-                                struct mgstat *stp) {
-  char date[64], lm[64], etag[64], range[64];
-  const char *msg = "OK", *hdr;
-  time_t curtime = time(NULL);
-  int64_t cl, r1, r2;
-  struct vec mime_vec;
-  FILE *fp;
-  int n;
-
-  get_mime_type(conn->ctx, path, &mime_vec);
-  cl = stp->size;
-  conn->request_info.status_code = 200;
-  range[0] = '\0';
-
-  if ((fp = mg_fopen(path, "rb")) == NULL) {
-    send_http_error(conn, 500, http_500_error,
-        "fopen(%s): %s", path, strerror(ERRNO));
-    return;
-  }
-  set_close_on_exec(fileno(fp));
-
-  // If Range: header specified, act accordingly
-  r1 = r2 = 0;
-  hdr = mg_get_header(conn, "Range");
-  if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
-    conn->request_info.status_code = 206;
-    (void) fseeko(fp, (off_t) r1, SEEK_SET);
-    cl = n == 2 ? r2 - r1 + 1: cl - r1;
-    (void) mg_snprintf(conn, range, sizeof(range),
-        "Content-Range: bytes "
-        "%" INT64_FMT "-%"
-        INT64_FMT "/%" INT64_FMT "\r\n",
-        r1, r1 + cl - 1, stp->size);
-    msg = "Partial Content";
-  }
-
-  // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
-  // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
-  gmt_time_string(date, sizeof(date), &curtime);
-  gmt_time_string(lm, sizeof(lm), &stp->mtime);
-  (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx",
-      (unsigned long) stp->mtime, (unsigned long) stp->size);
-
-  (void) mg_printf(conn,
-      "HTTP/1.1 %d %s\r\n"
-      "Date: %s\r\n"
-      "Last-Modified: %s\r\n"
-      "Etag: \"%s\"\r\n"
-      "Content-Type: %.*s\r\n"
-      "Content-Length: %" INT64_FMT "\r\n"
-      "Connection: %s\r\n"
-      "Accept-Ranges: bytes\r\n"
-      "%s\r\n",
-      conn->request_info.status_code, msg, date, lm, etag,
-      mime_vec.len, mime_vec.ptr, cl, suggest_connection_header(conn), range);
-
-  if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
-    send_file_data(conn, fp, cl);
-  }
-  (void) fclose(fp);
-}
-
-void mg_send_file(struct mg_connection *conn, const char *path) {
-  struct mgstat st;
-  if (mg_stat(path, &st) == 0) {
-    handle_file_request(conn, path, &st);
-  } else {
-    send_http_error(conn, 404, "Not Found", "%s", "File not found");
-  }
-}
-
-
-// Parse HTTP headers from the given buffer, advance buffer to the point
-// where parsing stopped.
-static void parse_http_headers(char **buf, struct mg_request_info *ri) {
-  int i;
-
-  for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
-    ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
-    ri->http_headers[i].value = skip(buf, "\r\n");
-    if (ri->http_headers[i].name[0] == '\0')
-      break;
-    ri->num_headers = i + 1;
-  }
-}
-
-static int is_valid_http_method(const char *method) {
-  return !strcmp(method, "GET") || !strcmp(method, "POST") ||
-    !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
-    !strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
-    !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND");
-}
-
-// Parse HTTP request, fill in mg_request_info structure.
-static int parse_http_request(char *buf, struct mg_request_info *ri) {
-  int status = 0;
-
-  // RFC says that all initial whitespaces should be ingored
-  while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
-    buf++;
-  }
-
-  ri->request_method = skip(&buf, " ");
-  ri->uri = skip(&buf, " ");
-  ri->http_version = skip(&buf, "\r\n");
-
-  if (is_valid_http_method(ri->request_method) &&
-      strncmp(ri->http_version, "HTTP/", 5) == 0) {
-    ri->http_version += 5;   // Skip "HTTP/"
-    parse_http_headers(&buf, ri);
-    status = 1;
-  }
-
-  return status;
-}
-
-// Keep reading the input (either opened file descriptor fd, or socket sock,
-// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
-// buffer (which marks the end of HTTP request). Buffer buf may already
-// have some data. The length of the data is stored in nread.
-// Upon every read operation, increase nread by the number of bytes read.
-static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
-                        int *nread) {
-  int n, request_len;
-
-  request_len = 0;
-  while (*nread < bufsiz && request_len == 0) {
-    n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread);
-    if (n <= 0) {
-      break;
-    } else {
-      *nread += n;
-      request_len = get_request_len(buf, *nread);
-    }
-  }
-
-  return request_len;
-}
-
-// For given directory path, substitute it to valid index file.
-// Return 0 if index file has been found, -1 if not found.
-// If the file is found, it's stats is returned in stp.
-static int substitute_index_file(struct mg_connection *conn, char *path,
-                                 size_t path_len, struct mgstat *stp) {
-  const char *list = conn->ctx->config[INDEX_FILES];
-  struct mgstat st;
-  struct vec filename_vec;
-  size_t n = strlen(path);
-  int found = 0;
-
-  // The 'path' given to us points to the directory. Remove all trailing
-  // directory separator characters from the end of the path, and
-  // then append single directory separator character.
-  while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
-    n--;
-  }
-  path[n] = DIRSEP;
-
-  // Traverse index files list. For each entry, append it to the given
-  // path and see if the file exists. If it exists, break the loop
-  while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
-
-    // Ignore too long entries that may overflow path buffer
-    if (filename_vec.len > path_len - n)
-      continue;
-
-    // Prepare full path to the index file
-    (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
-
-    // Does it exist?
-    if (mg_stat(path, &st) == 0) {
-      // Yes it does, break the loop
-      *stp = st;
-      found = 1;
-      break;
-    }
-  }
-
-  // If no index file exists, restore directory path
-  if (!found) {
-    path[n] = '\0';
-  }
-
-  return found;
-}
-
-// Return True if we should reply 304 Not Modified.
-static int is_not_modified(const struct mg_connection *conn,
-                           const struct mgstat *stp) {
-  const char *ims = mg_get_header(conn, "If-Modified-Since");
-  return ims != NULL && stp->mtime <= parse_date_string(ims);
-}
-
-static int forward_body_data(struct mg_connection *conn, FILE *fp,
-                             SOCKET sock, SSL *ssl) {
-  const char *expect, *buffered;
-  char buf[BUFSIZ];
-  int to_read, nread, buffered_len, success = 0;
-
-  expect = mg_get_header(conn, "Expect");
-  assert(fp != NULL);
-
-  if (conn->content_len == -1) {
-    send_http_error(conn, 411, "Length Required", "");
-  } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
-    send_http_error(conn, 417, "Expectation Failed", "");
-  } else {
-    if (expect != NULL) {
-      (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
-    }
-
-    buffered = conn->buf + conn->request_len;
-    buffered_len = conn->data_len - conn->request_len;
-    assert(buffered_len >= 0);
-    assert(conn->consumed_content == 0);
-
-    if (buffered_len > 0) {
-      if ((int64_t) buffered_len > conn->content_len) {
-        buffered_len = (int) conn->content_len;
-      }
-      push(fp, sock, ssl, buffered, (int64_t) buffered_len);
-      conn->consumed_content += buffered_len;
-    }
-
-    while (conn->consumed_content < conn->content_len) {
-      to_read = sizeof(buf);
-      if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
-        to_read = (int) (conn->content_len - conn->consumed_content);
-      }
-      nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read);
-      if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
-        break;
-      }
-      conn->consumed_content += nread;
-    }
-
-    if (conn->consumed_content == conn->content_len) {
-      success = 1;
-    }
-
-    // Each error code path in this function must send an error
-    if (!success) {
-      send_http_error(conn, 577, http_500_error, "");
-    }
-  }
-
-  return success;
-}
-
-#if !defined(NO_CGI)
-// This structure helps to create an environment for the spawned CGI program.
-// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
-// last element must be NULL.
-// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
-// strings must reside in a contiguous buffer. The end of the buffer is
-// marked by two '\0' characters.
-// We satisfy both worlds: we create an envp array (which is vars), all
-// entries are actually pointers inside buf.
-struct cgi_env_block {
-  struct mg_connection *conn;
-  char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
-  int len; // Space taken
-  char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
-  int nvars; // Number of variables
-};
-
-// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
-// pointer into the vars array.
-static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
-  int n, space;
-  char *added;
-  va_list ap;
-
-  // Calculate how much space is left in the buffer
-  space = sizeof(block->buf) - block->len - 2;
-  assert(space >= 0);
-
-  // Make a pointer to the free space int the buffer
-  added = block->buf + block->len;
-
-  // Copy VARIABLE=VALUE\0 string into the free space
-  va_start(ap, fmt);
-  n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
-  va_end(ap);
-
-  // Make sure we do not overflow buffer and the envp array
-  if (n > 0 && n < space &&
-      block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
-    // Append a pointer to the added string into the envp array
-    block->vars[block->nvars++] = block->buf + block->len;
-    // Bump up used length counter. Include \0 terminator
-    block->len += n + 1;
-  }
-
-  return added;
-}
-
-static void prepare_cgi_environment(struct mg_connection *conn,
-                                    const char *prog,
-                                    struct cgi_env_block *blk) {
-  const char *s, *slash;
-  struct vec var_vec, root;
-  char *p;
-  int  i;
-
-  blk->len = blk->nvars = 0;
-  blk->conn = conn;
-
-  memset(&root, 0, sizeof(root));
-
-  get_document_root(conn, &root);
-
-  addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
-  addenv(blk, "SERVER_ROOT=%.*s", root.len, root.ptr);
-  addenv(blk, "DOCUMENT_ROOT=%.*s", root.len, root.ptr);
-
-  // Prepare the environment block
-  addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
-  addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
-  addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
-  addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.u.sin.sin_port));
-  addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
-  addenv(blk, "REMOTE_ADDR=%s",
-      inet_ntoa(conn->client.rsa.u.sin.sin_addr));
-  addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
-  addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
-
-  // SCRIPT_NAME
-  assert(conn->request_info.uri[0] == '/');
-  slash = strrchr(conn->request_info.uri, '/');
-  if ((s = strrchr(prog, '/')) == NULL)
-    s = prog;
-  addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri,
-         conn->request_info.uri, s);
-
-  addenv(blk, "SCRIPT_FILENAME=%s", prog);
-  addenv(blk, "PATH_TRANSLATED=%s", prog);
-  addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
-
-  if ((s = mg_get_header(conn, "Content-Type")) != NULL)
-    addenv(blk, "CONTENT_TYPE=%s", s);
-
-  if (conn->request_info.query_string != NULL)
-    addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
-
-  if ((s = mg_get_header(conn, "Content-Length")) != NULL)
-    addenv(blk, "CONTENT_LENGTH=%s", s);
-
-  if ((s = getenv("PATH")) != NULL)
-    addenv(blk, "PATH=%s", s);
-
-#if defined(_WIN32)
-  if ((s = getenv("COMSPEC")) != NULL)
-    addenv(blk, "COMSPEC=%s", s);
-  if ((s = getenv("SYSTEMROOT")) != NULL)
-    addenv(blk, "SYSTEMROOT=%s", s);
-#else
-  if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
-    addenv(blk, "LD_LIBRARY_PATH=%s", s);
-#endif // _WIN32
-
-  if ((s = getenv("PERLLIB")) != NULL)
-    addenv(blk, "PERLLIB=%s", s);
-
-  if (conn->request_info.remote_user != NULL) {
-    addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
-    addenv(blk, "%s", "AUTH_TYPE=Digest");
-  }
-
-  // Add all headers as HTTP_* variables
-  for (i = 0; i < conn->request_info.num_headers; i++) {
-    p = addenv(blk, "HTTP_%s=%s",
-        conn->request_info.http_headers[i].name,
-        conn->request_info.http_headers[i].value);
-
-    // Convert variable name into uppercase, and change - to _
-    for (; *p != '=' && *p != '\0'; p++) {
-      if (*p == '-')
-        *p = '_';
-      *p = (char) toupper(* (unsigned char *) p);
-    }
-  }
-
-  // Add user-specified variables
-  s = conn->ctx->config[CGI_ENVIRONMENT];
-  while ((s = next_option(s, &var_vec, NULL)) != NULL) {
-    addenv(blk, "%.*s", var_vec.len, var_vec.ptr);
-  }
-
-  blk->vars[blk->nvars++] = NULL;
-  blk->buf[blk->len++] = '\0';
-
-  assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
-  assert(blk->len > 0);
-  assert(blk->len < (int) sizeof(blk->buf));
-}
-
-static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
-  int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
-  const char *status;
-  char buf[BUFSIZ], *pbuf, dir[PATH_MAX], *p;
-  struct mg_request_info ri;
-  struct cgi_env_block blk;
-  FILE *in, *out;
-  pid_t pid;
-
-  memset(&ri, 0, sizeof(ri));
-
-  prepare_cgi_environment(conn, prog, &blk);
-
-  // CGI must be executed in its own directory. 'dir' must point to the
-  // directory containing executable program, 'p' must point to the
-  // executable program name relative to 'dir'.
-  (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
-  if ((p = strrchr(dir, DIRSEP)) != NULL) {
-    *p++ = '\0';
-  } else {
-    dir[0] = '.', dir[1] = '\0';
-    p = (char *) prog;
-  }
-
-  pid = (pid_t) -1;
-  fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
-  in = out = NULL;
-
-  if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
-    send_http_error(conn, 500, http_500_error,
-        "Cannot create CGI pipe: %s", strerror(ERRNO));
-    goto done;
-  } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
-          fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
-    goto done;
-  } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
-      (out = fdopen(fd_stdout[0], "rb")) == NULL) {
-    send_http_error(conn, 500, http_500_error,
-        "fopen: %s", strerror(ERRNO));
-    goto done;
-  }
-
-  setbuf(in, NULL);
-  setbuf(out, NULL);
-
-  // spawn_process() must close those!
-  // If we don't mark them as closed, close() attempt before
-  // return from this function throws an exception on Windows.
-  // Windows does not like when closed descriptor is closed again.
-  fd_stdin[0] = fd_stdout[1] = -1;
-
-  // Send POST data to the CGI process if needed
-  if (!strcmp(conn->request_info.request_method, "POST") &&
-      !forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
-    goto done;
-  }
-
-  // Now read CGI reply into a buffer. We need to set correct
-  // status code, thus we need to see all HTTP headers first.
-  // Do not send anything back to client, until we buffer in all
-  // HTTP headers.
-  data_len = 0;
-  headers_len = read_request(out, INVALID_SOCKET, NULL,
-      buf, sizeof(buf), &data_len);
-  if (headers_len <= 0) {
-    send_http_error(conn, 500, http_500_error,
-                    "CGI program sent malformed HTTP headers: [%.*s]",
-                    data_len, buf);
-    goto done;
-  }
-  pbuf = buf;
-  buf[headers_len - 1] = '\0';
-  parse_http_headers(&pbuf, &ri);
-
-  // Make up and send the status line
-  status = get_header(&ri, "Status");
-  conn->request_info.status_code = status == NULL ? 200 : atoi(status);
-  (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n", conn->request_info.status_code);
-
-  // Send headers
-  for (i = 0; i < ri.num_headers; i++) {
-    mg_printf(conn, "%s: %s\r\n",
-              ri.http_headers[i].name, ri.http_headers[i].value);
-  }
-  (void) mg_write(conn, "\r\n", 2);
-
-  // Send chunk of data that may be read after the headers
-  conn->num_bytes_sent += mg_write(conn, buf + headers_len,
-                                   (size_t)(data_len - headers_len));
-
-  // Read the rest of CGI output and send to the client
-  send_file_data(conn, out, INT64_MAX);
-
-done:
-  if (pid != (pid_t) -1) {
-    kill(pid, SIGKILL);
-  }
-  if (fd_stdin[0] != -1) {
-    (void) close(fd_stdin[0]);
-  }
-  if (fd_stdout[1] != -1) {
-    (void) close(fd_stdout[1]);
-  }
-
-  if (in != NULL) {
-    (void) fclose(in);
-  } else if (fd_stdin[1] != -1) {
-    (void) close(fd_stdin[1]);
-  }
-
-  if (out != NULL) {
-    (void) fclose(out);
-  } else if (fd_stdout[0] != -1) {
-    (void) close(fd_stdout[0]);
-  }
-}
-#endif // !NO_CGI
-
-// For a given PUT path, create all intermediate subdirectories
-// for given path. Return 0 if the path itself is a directory,
-// or -1 on error, 1 if OK.
-static int put_dir(const char *path) {
-  char buf[PATH_MAX];
-  const char *s, *p;
-  struct mgstat st;
-  int len, res = 1;
-
-  for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) {
-    len = p - path;
-    if (len >= (int) sizeof(buf)) {
-      res = -1;
-      break;
-    }
-    memcpy(buf, path, len);
-    buf[len] = '\0';
-
-    // Try to create intermediate directory
-    DEBUG_TRACE(("mkdir(%s)", buf));
-    if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
-      res = -1;
-      break;
-    }
-
-    // Is path itself a directory?
-    if (p[1] == '\0') {
-      res = 0;
-    }
-  }
-
-  return res;
-}
-
-static void put_file(struct mg_connection *conn, const char *path) {
-  struct mgstat st;
-  const char *range;
-  int64_t r1, r2;
-  FILE *fp;
-  int rc;
-
-  conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
-
-  if ((rc = put_dir(path)) == 0) {
-    mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
-  } else if (rc == -1) {
-    send_http_error(conn, 500, http_500_error,
-        "put_dir(%s): %s", path, strerror(ERRNO));
-  } else if ((fp = mg_fopen(path, "wb+")) == NULL) {
-    send_http_error(conn, 500, http_500_error,
-        "fopen(%s): %s", path, strerror(ERRNO));
-  } else {
-    set_close_on_exec(fileno(fp));
-    range = mg_get_header(conn, "Content-Range");
-    r1 = r2 = 0;
-    if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
-      conn->request_info.status_code = 206;
-      // TODO(lsm): handle seek error
-      (void) fseeko(fp, (off_t) r1, SEEK_SET);
-    }
-    if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
-      (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
-          conn->request_info.status_code);
-    (void) fclose(fp);
-  }
-}
-
-static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
-
-static void do_ssi_include(struct mg_connection *conn, const char *ssi,
-                           char *tag, int include_level) {
-  char file_name[BUFSIZ], path[PATH_MAX], *p;
-  struct vec root;
-  int is_ssi;
-  FILE *fp;
-
-  get_document_root(conn, &root);
-
-  // sscanf() is safe here, since send_ssi_file() also uses buffer
-  // of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ.
-  if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the webserver root
-    (void) mg_snprintf(conn, path, sizeof(path), "%.*s%c%s",
-        root.len, root.ptr, DIRSEP, file_name);
-  } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the webserver working directory
-    // or it is absolute system path
-    (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
-  } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the currect document
-    (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
-    if ((p = strrchr(path, DIRSEP)) != NULL) {
-      p[1] = '\0';
-    }
-    (void) mg_snprintf(conn, path + strlen(path),
-        sizeof(path) - strlen(path), "%s", file_name);
-  } else {
-    cry(conn, "Bad SSI #include: [%s]", tag);
-    return;
-  }
-
-  if ((fp = mg_fopen(path, "rb")) == NULL) {
-    cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
-        tag, path, strerror(ERRNO));
-  } else {
-    set_close_on_exec(fileno(fp));
-    is_ssi = match_extension(path, conn->ctx->config[SSI_EXTENSIONS]);
-    if (is_ssi) {
-      send_ssi_file(conn, path, fp, include_level + 1);
-    } else {
-      send_file_data(conn, fp, INT64_MAX);
-    }
-    (void) fclose(fp);
-  }
-}
-
-#if !defined(NO_POPEN)
-static void do_ssi_exec(struct mg_connection *conn, char *tag) {
-  char cmd[BUFSIZ];
-  FILE *fp;
-
-  if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
-    cry(conn, "Bad SSI #exec: [%s]", tag);
-  } else if ((fp = popen(cmd, "r")) == NULL) {
-    cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
-  } else {
-    send_file_data(conn, fp, INT64_MAX);
-    (void) pclose(fp);
-  }
-}
-#endif // !NO_POPEN
-
-static void send_ssi_file(struct mg_connection *conn, const char *path,
-                          FILE *fp, int include_level) {
-  char buf[BUFSIZ];
-  int ch, len, in_ssi_tag;
-
-  if (include_level > 10) {
-    cry(conn, "SSI #include level is too deep (%s)", path);
-    return;
-  }
-
-  in_ssi_tag = 0;
-  len = 0;
-
-  while ((ch = fgetc(fp)) != EOF) {
-    if (in_ssi_tag && ch == '>') {
-      in_ssi_tag = 0;
-      buf[len++] = (char) ch;
-      buf[len] = '\0';
-      assert(len <= (int) sizeof(buf));
-      if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
-        // Not an SSI tag, pass it
-        (void) mg_write(conn, buf, (size_t)len);
-      } else {
-        if (!memcmp(buf + 5, "include", 7)) {
-          do_ssi_include(conn, path, buf + 12, include_level);
-#if !defined(NO_POPEN)
-        } else if (!memcmp(buf + 5, "exec", 4)) {
-          do_ssi_exec(conn, buf + 9);
-#endif // !NO_POPEN
-        } else {
-          cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
-        }
-      }
-      len = 0;
-    } else if (in_ssi_tag) {
-      if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
-        // Not an SSI tag
-        in_ssi_tag = 0;
-      } else if (len == (int) sizeof(buf) - 2) {
-        cry(conn, "%s: SSI tag is too large", path);
-        len = 0;
-      }
-      buf[len++] = ch & 0xff;
-    } else if (ch == '<') {
-      in_ssi_tag = 1;
-      if (len > 0) {
-        (void) mg_write(conn, buf, (size_t)len);
-      }
-      len = 0;
-      buf[len++] = ch & 0xff;
-    } else {
-      buf[len++] = ch & 0xff;
-      if (len == (int) sizeof(buf)) {
-        (void) mg_write(conn, buf, (size_t)len);
-        len = 0;
-      }
-    }
-  }
-
-  // Send the rest of buffered data
-  if (len > 0) {
-    (void) mg_write(conn, buf, (size_t)len);
-  }
-}
-
-static void handle_ssi_file_request(struct mg_connection *conn,
-                                    const char *path) {
-  FILE *fp;
-
-  if ((fp = mg_fopen(path, "rb")) == NULL) {
-    send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
-                    strerror(ERRNO));
-  } else {
-    set_close_on_exec(fileno(fp));
-    mg_printf(conn, "HTTP/1.1 200 OK\r\n"
-              "Content-Type: text/html\r\nConnection: %s\r\n\r\n",
-              suggest_connection_header(conn));
-    send_ssi_file(conn, path, fp, 0);
-    (void) fclose(fp);
-  }
-}
-
-static void send_options(struct mg_connection *conn) {
-  conn->request_info.status_code = 200;
-
-  (void) mg_printf(conn,
-      "HTTP/1.1 200 OK\r\n"
-      "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n"
-      "DAV: 1\r\n\r\n");
-}
-
-// Writes PROPFIND properties for a collection element
-static void print_props(struct mg_connection *conn, const char* uri,
-                        struct mgstat* st) {
-  char mtime[64];
-  gmt_time_string(mtime, sizeof(mtime), &st->mtime);
-  conn->num_bytes_sent += mg_printf(conn,
-      "<d:response>"
-       "<d:href>%s</d:href>"
-       "<d:propstat>"
-        "<d:prop>"
-         "<d:resourcetype>%s</d:resourcetype>"
-         "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
-         "<d:getlastmodified>%s</d:getlastmodified>"
-        "</d:prop>"
-        "<d:status>HTTP/1.1 200 OK</d:status>"
-       "</d:propstat>"
-      "</d:response>\n",
-      uri,
-      st->is_directory ? "<d:collection/>" : "",
-      st->size,
-      mtime);
-}
-
-static void print_dav_dir_entry(struct de *de, void *data) {
-  char href[PATH_MAX];
-  struct mg_connection *conn = (struct mg_connection *) data;
-  mg_snprintf(conn, href, sizeof(href), "%s%s",
-              conn->request_info.uri, de->file_name);
-  print_props(conn, href, &de->st);
-}
-
-static void handle_propfind(struct mg_connection *conn, const char* path,
-                            struct mgstat* st) {
-  const char *depth = mg_get_header(conn, "Depth");
-
-  conn->request_info.status_code = 207;
-  mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n"
-            "Connection: close\r\n"
-            "Content-Type: text/xml; charset=utf-8\r\n\r\n");
-
-  conn->num_bytes_sent += mg_printf(conn,
-      "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
-      "<d:multistatus xmlns:d='DAV:'>\n");
-
-  // Print properties for the requested resource itself
-  print_props(conn, conn->request_info.uri, st);
-
-  // If it is a directory, print directory entries too if Depth is not 0
-  if (st->is_directory &&
-      !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") &&
-      (depth == NULL || strcmp(depth, "0") != 0)) {
-    scan_directory(conn, path, conn, &print_dav_dir_entry);
-  }
-
-  conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>");
-}
-
-// This is the heart of the Mongoose's logic.
-// This function is called when the request is read, parsed and validated,
-// and Mongoose must decide what action to take: serve a file, or
-// a directory, or call embedded function, etcetera.
-static void handle_request(struct mg_connection *conn) {
-  struct mg_request_info *ri = &conn->request_info;
-  char path[PATH_MAX];
-  int uri_len;
-  struct mgstat st;
-
-  if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
-    * conn->request_info.query_string++ = '\0';
-  }
-  uri_len = strlen(ri->uri);
-  url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
-  remove_double_dots_and_double_slashes(ri->uri);
-  convert_uri_to_file_name(conn, ri->uri, path, sizeof(path));
-
-  DEBUG_TRACE(("%s", ri->uri));
-  if (!check_authorization(conn, path)) {
-    send_authorization_request(conn);
-  } else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
-    // Do nothing, callback has served the request
-  } else if (!strcmp(ri->request_method, "OPTIONS")) {
-    send_options(conn);
-  } else if (strstr(path, PASSWORDS_FILE_NAME)) {
-    // Do not allow to view passwords files
-    send_http_error(conn, 403, "Forbidden", "Access Forbidden");
-  } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
-    send_http_error(conn, 404, "Not Found", "Not Found");
-  } else if ((!strcmp(ri->request_method, "PUT") ||
-        !strcmp(ri->request_method, "DELETE")) &&
-      (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
-       !is_authorized_for_put(conn))) {
-    send_authorization_request(conn);
-  } else if (!strcmp(ri->request_method, "PUT")) {
-    put_file(conn, path);
-  } else if (!strcmp(ri->request_method, "DELETE")) {
-    if (mg_remove(path) == 0) {
-      send_http_error(conn, 200, "OK", "");
-    } else {
-      send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
-                      strerror(ERRNO));
-    }
-  } else if (mg_stat(path, &st) != 0) {
-    send_http_error(conn, 404, "Not Found", "%s", "File not found");
-  } else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
-    (void) mg_printf(conn,
-        "HTTP/1.1 301 Moved Permanently\r\n"
-        "Location: %s/\r\n\r\n", ri->uri);
-  } else if (!strcmp(ri->request_method, "PROPFIND")) {
-    handle_propfind(conn, path, &st);
-  } else if (st.is_directory &&
-             !substitute_index_file(conn, path, sizeof(path), &st)) {
-    if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
-      handle_directory_request(conn, path);
-    } else {
-      send_http_error(conn, 403, "Directory Listing Denied",
-          "Directory listing denied");
-    }
-#if !defined(NO_CGI)
-  } else if (match_extension(path, conn->ctx->config[CGI_EXTENSIONS])) {
-    if (strcmp(ri->request_method, "POST") &&
-        strcmp(ri->request_method, "GET")) {
-      send_http_error(conn, 501, "Not Implemented",
-          "Method %s is not implemented", ri->request_method);
-    } else {
-      handle_cgi_request(conn, path);
-    }
-#endif // !NO_CGI
-  } else if (match_extension(path, conn->ctx->config[SSI_EXTENSIONS])) {
-    handle_ssi_file_request(conn, path);
-  } else if (is_not_modified(conn, &st)) {
-    send_http_error(conn, 304, "Not Modified", "");
-  } else {
-    handle_file_request(conn, path, &st);
-  }
-}
-
-static void close_all_listening_sockets(struct mg_context *ctx) {
-  struct socket *sp, *tmp;
-  for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
-    tmp = sp->next;
-    (void) closesocket(sp->sock);
-    free(sp);
-  }
-}
-
-// Valid listening port specification is: [ip_address:]port[s|p]
-// Examples: 80, 443s, 127.0.0.1:3128p, 1.2.3.4:8080sp
-static int parse_port_string(const struct vec *vec, struct socket *so) {
-  struct usa *usa = &so->lsa;
-  int a, b, c, d, port, len;
-
-  // MacOS needs that. If we do not zero it, subsequent bind() will fail.
-  memset(so, 0, sizeof(*so));
-
-  if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
-    // IP address to bind to is specified
-    usa->u.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
-  } else if (sscanf(vec->ptr, "%d%n", &port, &len) == 1) {
-    // Only port number is specified. Bind to all addresses
-    usa->u.sin.sin_addr.s_addr = htonl(INADDR_ANY);
-  } else {
-    return 0;
-  }
-  assert(len > 0 && len <= (int) vec->len);
-
-  if (strchr("sp,", vec->ptr[len]) == NULL) {
-    return 0;
-  }
-
-  so->is_ssl = vec->ptr[len] == 's';
-  so->is_proxy = vec->ptr[len] == 'p';
-  usa->len = sizeof(usa->u.sin);
-  usa->u.sin.sin_family = AF_INET;
-  usa->u.sin.sin_port = htons((uint16_t) port);
-
-  return 1;
-}
-
-static int set_ports_option(struct mg_context *ctx) {
-  const char *list = ctx->config[LISTENING_PORTS];
-  int on = 1, success = 1;
-  SOCKET sock;
-  struct vec vec;
-  struct socket so, *listener;
-
-  struct linger linger;
-  linger.l_onoff = 1;
-  linger.l_linger = 1;
-
-  while (success && (list = next_option(list, &vec, NULL)) != NULL) {
-    if (!parse_port_string(&vec, &so)) {
-      cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
-          __func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
-      success = 0;
-    } else if (so.is_ssl && ctx->ssl_ctx == NULL) {
-      cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?");
-      success = 0;
-    } else if ((sock = socket(PF_INET, SOCK_STREAM, 6)) == INVALID_SOCKET ||
-#if !defined(_WIN32)
-               // On Windows, SO_REUSEADDR is recommended only for
-               // broadcast UDP sockets
-               setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on,
-                          sizeof(on)) != 0 ||
-#endif // !_WIN32
-               // Set TCP keep-alive. This is needed because if HTTP-level
-               // keep-alive is enabled, and client resets the connection,
-               // server won't get TCP FIN or RST and will keep the connection
-               // open forever. With TCP keep-alive, next keep-alive
-               // handshake will figure out that the client is down and
-               // will close the server end.
-               // Thanks to Igor Klopov who suggested the patch.
-               setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on,
-                          sizeof(on)) != 0 ||
-               setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &linger,
-                          sizeof(linger)) ||
-               bind(sock, &so.lsa.u.sa, so.lsa.len) != 0 ||
-               listen(sock, 100) != 0) {
-      closesocket(sock);
-      cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
-          vec.len, vec.ptr, strerror(ERRNO));
-      success = 0;
-    } else if ((listener = (struct socket *)
-                calloc(1, sizeof(*listener))) == NULL) {
-      closesocket(sock);
-      cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
-      success = 0;
-    } else {
-      *listener = so;
-      listener->sock = sock;
-      set_close_on_exec(listener->sock);
-      listener->next = ctx->listening_sockets;
-      ctx->listening_sockets = listener;
-    }
-  }
-
-  if (!success) {
-    close_all_listening_sockets(ctx);
-  }
-
-  return success;
-}
-
-static void log_header(const struct mg_connection *conn, const char *header,
-                       FILE *fp) {
-  const char *header_value;
-
-  if ((header_value = mg_get_header(conn, header)) == NULL) {
-    (void) fprintf(fp, "%s", " -");
-  } else {
-    (void) fprintf(fp, " \"%s\"", header_value);
-  }
-}
-
-static void log_access(const struct mg_connection *conn) {
-  const struct mg_request_info *ri;
-  FILE *fp;
-  char date[64];
-
-  fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ?  NULL :
-    mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
-
-  if (fp == NULL)
-    return;
-
-  (void) strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
-      localtime(&conn->birth_time));
-
-  ri = &conn->request_info;
-
-  flockfile(fp);
-
-  (void) fprintf(fp,
-      "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
-      inet_ntoa(conn->client.rsa.u.sin.sin_addr),
-      ri->remote_user == NULL ? "-" : ri->remote_user,
-      date,
-      ri->request_method ? ri->request_method : "-",
-      ri->uri ? ri->uri : "-",
-      ri->http_version,
-      conn->request_info.status_code, conn->num_bytes_sent);
-  log_header(conn, "Referer", fp);
-  log_header(conn, "User-Agent", fp);
-  (void) fputc('\n', fp);
-  (void) fflush(fp);
-
-  funlockfile(fp);
-  (void) fclose(fp);
-}
-
-static int isbyte(int n) {
-  return n >= 0 && n <= 255;
-}
-
-// Verify given socket address against the ACL.
-// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
-static int check_acl(struct mg_context *ctx, const struct usa *usa) {
-  int a, b, c, d, n, mask, allowed;
-  char flag;
-  uint32_t acl_subnet, acl_mask, remote_ip;
-  struct vec vec;
-  const char *list = ctx->config[ACCESS_CONTROL_LIST];
-
-  if (list == NULL) {
-    return 1;
-  }
-
-  (void) memcpy(&remote_ip, &usa->u.sin.sin_addr, sizeof(remote_ip));
-
-  // If any ACL is set, deny by default
-  allowed = '-';
-
-  while ((list = next_option(list, &vec, NULL)) != NULL) {
-    mask = 32;
-
-    if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) {
-      cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
-      return -1;
-    } else if (flag != '+' && flag != '-') {
-      cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr);
-      return -1;
-    } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
-      cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr);
-      return -1;
-    } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) {
-      // Do nothing, no mask specified
-    } else if (mask < 0 || mask > 32) {
-      cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr);
-      return -1;
-    }
-
-    acl_subnet = (a << 24) | (b << 16) | (c << 8) | d;
-    acl_mask = mask ? 0xffffffffU << (32 - mask) : 0;
-
-    if (acl_subnet == (ntohl(remote_ip) & acl_mask)) {
-      allowed = flag;
-    }
-  }
-
-  return allowed == '+';
-}
-
-static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
-  FD_SET(fd, set);
-  if (fd > (SOCKET) *max_fd) {
-    *max_fd = (int) fd;
-  }
-}
-
-#if !defined(_WIN32)
-static int set_uid_option(struct mg_context *ctx) {
-  struct passwd *pw;
-  const char *uid = ctx->config[RUN_AS_USER];
-  int success = 0;
-
-  if (uid == NULL) {
-    success = 1;
-  } else {
-    if ((pw = getpwnam(uid)) == NULL) {
-      cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
-    } else if (setgid(pw->pw_gid) == -1) {
-      cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
-    } else if (setuid(pw->pw_uid) == -1) {
-      cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
-    } else {
-      success = 1;
-    }
-  }
-
-  return success;
-}
-#endif // !_WIN32
-
-#if !defined(NO_SSL)
-static pthread_mutex_t *ssl_mutexes;
-
-static void ssl_locking_callback(int mode, int mutex_num, const char *file,
-                                 int line) {
-  line = 0;    // Unused
-  file = NULL; // Unused
-
-  if (mode & CRYPTO_LOCK) {
-    (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
-  } else {
-    (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
-  }
-}
-
-static unsigned long ssl_id_callback(void) {
-  return (unsigned long) pthread_self();
-}
-
-#if !defined(NO_SSL_DL)
-static int load_dll(struct mg_context *ctx, const char *dll_name,
-                    struct ssl_func *sw) {
-  union {void *p; void (*fp)(void);} u;
-  void  *dll_handle;
-  struct ssl_func *fp;
-
-  if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
-    cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
-    return 0;
-  }
-
-  for (fp = sw; fp->name != NULL; fp++) {
-#ifdef _WIN32
-    // GetProcAddress() returns pointer to function
-    u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
-#else
-    // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to
-    // function pointers. We need to use a union to make a cast.
-    u.p = dlsym(dll_handle, fp->name);
-#endif // _WIN32
-    if (u.fp == NULL) {
-      cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
-      return 0;
-    } else {
-      fp->ptr = u.fp;
-    }
-  }
-
-  return 1;
-}
-#endif // NO_SSL_DL
-
-// Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
-static int set_ssl_option(struct mg_context *ctx) {
-  struct mg_request_info request_info;
-  SSL_CTX *CTX;
-  int i, size;
-  const char *pem = ctx->config[SSL_CERTIFICATE];
-  const char *chain = ctx->config[SSL_CHAIN_FILE];
-
-  if (pem == NULL) {
-    return 1;
-  }
-
-#if !defined(NO_SSL_DL)
-  if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
-      !load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
-    return 0;
-  }
-#endif // NO_SSL_DL
-
-  // Initialize SSL crap
-  SSL_library_init();
-  SSL_load_error_strings();
-
-  if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) {
-    cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
-  } else if (ctx->user_callback != NULL) {
-    memset(&request_info, 0, sizeof(request_info));
-    request_info.user_data = ctx->user_data;
-    ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX,
-                       &request_info);
-  }
-
-  if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem,
-        SSL_FILETYPE_PEM) == 0) {
-    cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
-    return 0;
-  } else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem,
-        SSL_FILETYPE_PEM) == 0) {
-    cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error());
-    return 0;
-  }
-
-  if (CTX != NULL && chain != NULL &&
-      SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) {
-    cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error());
-    return 0;
-  }
-
-  // Initialize locking callbacks, needed for thread safety.
-  // http://www.openssl.org/support/faq.html#PROG1
-  size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
-  if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
-    cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
-    return 0;
-  }
-
-  for (i = 0; i < CRYPTO_num_locks(); i++) {
-    pthread_mutex_init(&ssl_mutexes[i], NULL);
-  }
-
-  CRYPTO_set_locking_callback(&ssl_locking_callback);
-  CRYPTO_set_id_callback(&ssl_id_callback);
-
-  // Done with everything. Save the context.
-  ctx->ssl_ctx = CTX;
-
-  return 1;
-}
-
-static void uninitialize_ssl(struct mg_context *ctx) {
-  int i;
-  if (ctx->ssl_ctx != NULL) {
-    CRYPTO_set_locking_callback(NULL);
-    for (i = 0; i < CRYPTO_num_locks(); i++) {
-      pthread_mutex_destroy(&ssl_mutexes[i]);
-    }
-    CRYPTO_set_locking_callback(NULL);
-    CRYPTO_set_id_callback(NULL);
-  }
-}
-#endif // !NO_SSL
-
-static int set_gpass_option(struct mg_context *ctx) {
-  struct mgstat mgstat;
-  const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
-  return path == NULL || mg_stat(path, &mgstat) == 0;
-}
-
-static int set_acl_option(struct mg_context *ctx) {
-  struct usa fake;
-  return check_acl(ctx, &fake) != -1;
-}
-
-static void reset_per_request_attributes(struct mg_connection *conn) {
-  struct mg_request_info *ri = &conn->request_info;
-
-  // Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
-  if (ri->remote_user != NULL) {
-    free((void *) ri->remote_user);
-  }
-  ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL;
-  ri->num_headers = 0;
-  ri->status_code = -1;
-
-  conn->num_bytes_sent = conn->consumed_content = 0;
-  conn->content_len = -1;
-  conn->request_len = conn->data_len = 0;
-}
-
-static void close_socket_gracefully(SOCKET sock) {
-  char buf[BUFSIZ];
-  int n;
-
-  // Send FIN to the client
-  (void) shutdown(sock, SHUT_WR);
-  set_non_blocking_mode(sock);
-
-  // Read and discard pending data. If we do not do that and close the
-  // socket, the data in the send buffer may be discarded. This
-  // behaviour is seen on Windows, when client keeps sending data
-  // when server decide to close the connection; then when client
-  // does recv() it gets no data back.
-  do {
-    n = pull(NULL, sock, NULL, buf, sizeof(buf));
-  } while (n > 0);
-
-  // Now we know that our FIN is ACK-ed, safe to close
-  (void) closesocket(sock);
-}
-
-static void close_connection(struct mg_connection *conn) {
-  if (conn->ssl) {
-    SSL_free(conn->ssl);
-    conn->ssl = NULL;
-  }
-
-  if (conn->client.sock != INVALID_SOCKET) {
-    close_socket_gracefully(conn->client.sock);
-  }
-}
-
-static void discard_current_request_from_buffer(struct mg_connection *conn) {
-  int buffered_len, body_len;
-
-  buffered_len = conn->data_len - conn->request_len;
-  assert(buffered_len >= 0);
-
-  if (conn->content_len == -1) {
-    body_len = 0;
-  } else if (conn->content_len < (int64_t) buffered_len) {
-    body_len = (int) conn->content_len;
-  } else {
-    body_len = buffered_len;
-  }
-
-  conn->data_len -= conn->request_len + body_len;
-  memmove(conn->buf, conn->buf + conn->request_len + body_len,
-          (size_t) conn->data_len);
-}
-
-static int parse_url(const char *url, char *host, int *port) {
-  int len;
-
-  if (sscanf(url, "%*[htps]://%1024[^:]:%d%n", host, port, &len) == 2 ||
-      sscanf(url, "%1024[^:]:%d%n", host, port, &len) == 2) {
-  } else if (sscanf(url, "%*[htps]://%1024[^/]%n", host, &len) == 1) {
-    *port = 80;
-  } else {
-    sscanf(url, "%1024[^/]%n", host, &len);
-    *port = 80;
-  }
-  DEBUG_TRACE(("Host:%s, port:%d", host, *port));
-
-  return len;
-}
-
-static void handle_proxy_request(struct mg_connection *conn) {
-  struct mg_request_info *ri = &conn->request_info;
-  char host[1025], buf[BUFSIZ];
-  int port, is_ssl, len, i, n;
-
-  DEBUG_TRACE(("URL: %s", ri->uri));
-  if (ri->uri == NULL ||
-      ri->uri[0] == '/' ||
-      (len = parse_url(ri->uri, host, &port)) == 0) {
-    return;
-  }
-
-  if (conn->peer == NULL) {
-    is_ssl = !strcmp(ri->request_method, "CONNECT");
-    if ((conn->peer = mg_connect(conn, host, port, is_ssl)) == NULL) {
-      return;
-    }
-    conn->peer->client.is_ssl = is_ssl;
-  }
-
-  // Forward client's request to the target
-  mg_printf(conn->peer, "%s %s HTTP/%s\r\n", ri->request_method, ri->uri + len,
-            ri->http_version);
-
-  // And also all headers. TODO(lsm): anonymize!
-  for (i = 0; i < ri->num_headers; i++) {
-    mg_printf(conn->peer, "%s: %s\r\n", ri->http_headers[i].name,
-              ri->http_headers[i].value);
-  }
-  // End of headers, final newline
-  mg_write(conn->peer, "\r\n", 2);
-
-  // Read and forward body data if any
-  if (!strcmp(ri->request_method, "POST")) {
-    forward_body_data(conn, NULL, conn->peer->client.sock, conn->peer->ssl);
-  }
-
-  // Read data from the target and forward it to the client
-  while ((n = pull(NULL, conn->peer->client.sock, conn->peer->ssl,
-                   buf, sizeof(buf))) > 0) {
-    if (mg_write(conn, buf, (size_t)n) != n) {
-      break;
-    }
-  }
-
-  if (!conn->peer->client.is_ssl) {
-    close_connection(conn->peer);
-    free(conn->peer);
-    conn->peer = NULL;
-  }
-}
-
-static int is_valid_uri(const char *uri) {
-  // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
-  // URI can be an asterisk (*) or should start with slash.
-  return (uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'));
-}
-
-static void process_new_connection(struct mg_connection *conn) {
-  struct mg_request_info *ri = &conn->request_info;
-  int keep_alive_enabled;
-  const char *cl;
-
-  keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
-
-  do {
-    reset_per_request_attributes(conn);
-
-    // If next request is not pipelined, read it in
-    if ((conn->request_len = get_request_len(conn->buf, conn->data_len)) == 0) {
-      conn->request_len = read_request(NULL, conn->client.sock, conn->ssl,
-          conn->buf, conn->buf_size, &conn->data_len);
-    }
-    assert(conn->data_len >= conn->request_len);
-    if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
-      send_http_error(conn, 413, "Request Too Large", "");
-      return;
-    } if (conn->request_len <= 0) {
-      return;  // Remote end closed the connection
-    }
-
-    // Nul-terminate the request cause parse_http_request() uses sscanf
-    conn->buf[conn->request_len - 1] = '\0';
-    if (!parse_http_request(conn->buf, ri) ||
-        (!conn->client.is_proxy && !is_valid_uri(ri->uri))) {
-      // Do not put garbage in the access log, just send it back to the client
-      send_http_error(conn, 400, "Bad Request",
-          "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
-    } else if (strcmp(ri->http_version, "1.0") &&
-               strcmp(ri->http_version, "1.1")) {
-      // Request seems valid, but HTTP version is strange
-      send_http_error(conn, 505, "HTTP version not supported", "");
-      log_access(conn);
-    } else {
-      // Request is valid, handle it
-      cl = get_header(ri, "Content-Length");
-      conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
-      conn->birth_time = time(NULL);
-      if (conn->client.is_proxy) {
-        handle_proxy_request(conn);
-      } else {
-        handle_request(conn);
-      }
-      log_access(conn);
-      discard_current_request_from_buffer(conn);
-    }
-    // conn->peer is not NULL only for SSL-ed proxy connections
-  } while (conn->ctx->stop_flag == 0 &&
-           (conn->peer || (keep_alive_enabled && should_keep_alive(conn))));
-}
-
-// Worker threads take accepted socket from the queue
-static int consume_socket(struct mg_context *ctx, struct socket *sp) {
-  (void) pthread_mutex_lock(&ctx->mutex);
-  DEBUG_TRACE(("going idle"));
-
-  // If the queue is empty, wait. We're idle at this point.
-  while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
-    pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
-  }
-
-  // If we're stopping, sq_head may be equal to sq_tail.
-  if (ctx->sq_head > ctx->sq_tail) {
-    // Copy socket from the queue and increment tail
-    *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
-    ctx->sq_tail++;
-    DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
-
-    // Wrap pointers if needed
-    while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
-      ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
-      ctx->sq_head -= ARRAY_SIZE(ctx->queue);
-    }
-  }
-
-  (void) pthread_cond_signal(&ctx->sq_empty);
-  (void) pthread_mutex_unlock(&ctx->mutex);
-
-  return !ctx->stop_flag;
-}
-
-static void worker_thread(struct mg_context *ctx) {
-  struct mg_connection *conn;
-  int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]);
-
-  conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size);
-  conn->buf_size = buf_size;
-  conn->buf = (char *) (conn + 1);
-  assert(conn != NULL);
-
-  // Call consume_socket() even when ctx->stop_flag > 0, to let it signal
-  // sq_empty condvar to wake up the master waiting in produce_socket()
-  while (consume_socket(ctx, &conn->client)) {
-    conn->birth_time = time(NULL);
-    conn->ctx = ctx;
-
-    // Fill in IP, port info early so even if SSL setup below fails,
-    // error handler would have the corresponding info.
-    // Thanks to Johannes Winkelmann for the patch.
-    conn->request_info.remote_port = ntohs(conn->client.rsa.u.sin.sin_port);
-    memcpy(&conn->request_info.remote_ip,
-           &conn->client.rsa.u.sin.sin_addr.s_addr, 4);
-    conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
-    conn->request_info.is_ssl = conn->client.is_ssl;
-
-    if (!conn->client.is_ssl ||
-        (conn->client.is_ssl && sslize(conn, SSL_accept))) {
-      process_new_connection(conn);
-    }
-
-    close_connection(conn);
-  }
-  free(conn);
-
-  // Signal master that we're done with connection and exiting
-  (void) pthread_mutex_lock(&ctx->mutex);
-  ctx->num_threads--;
-  (void) pthread_cond_signal(&ctx->cond);
-  assert(ctx->num_threads >= 0);
-  (void) pthread_mutex_unlock(&ctx->mutex);
-
-  DEBUG_TRACE(("exiting"));
-}
-
-// Master thread adds accepted socket to a queue
-static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
-  (void) pthread_mutex_lock(&ctx->mutex);
-
-  // If the queue is full, wait
-  while (ctx->stop_flag == 0 &&
-         ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
-    (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
-  }
-
-  if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) {
-    // Copy socket to the queue and increment head
-    ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
-    ctx->sq_head++;
-    DEBUG_TRACE(("queued socket %d", sp->sock));
-  }
-
-  (void) pthread_cond_signal(&ctx->sq_full);
-  (void) pthread_mutex_unlock(&ctx->mutex);
-}
-
-static void accept_new_connection(const struct socket *listener,
-                                  struct mg_context *ctx) {
-  struct socket accepted;
-  int allowed;
-
-  accepted.rsa.len = sizeof(accepted.rsa.u.sin);
-  accepted.lsa = listener->lsa;
-  accepted.sock = accept(listener->sock, &accepted.rsa.u.sa, &accepted.rsa.len);
-  if (accepted.sock != INVALID_SOCKET) {
-    allowed = check_acl(ctx, &accepted.rsa);
-    if (allowed) {
-      // Put accepted socket structure into the queue
-      DEBUG_TRACE(("accepted socket %d", accepted.sock));
-      accepted.is_ssl = listener->is_ssl;
-      accepted.is_proxy = listener->is_proxy;
-      produce_socket(ctx, &accepted);
-    } else {
-      cry(fc(ctx), "%s: %s is not allowed to connect",
-          __func__, inet_ntoa(accepted.rsa.u.sin.sin_addr));
-      (void) closesocket(accepted.sock);
-    }
-  }
-}
-
-static void master_thread(struct mg_context *ctx) {
-  fd_set read_set;
-  struct timeval tv;
-  struct socket *sp;
-  int max_fd;
-
-  while (ctx->stop_flag == 0) {
-    FD_ZERO(&read_set);
-    max_fd = -1;
-
-    // Add listening sockets to the read set
-    for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
-      add_to_set(sp->sock, &read_set, &max_fd);
-    }
-
-    tv.tv_sec = 0;
-    tv.tv_usec = 200 * 1000;
-
-    if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
-#ifdef _WIN32
-      // On windows, if read_set and write_set are empty,
-      // select() returns "Invalid parameter" error
-      // (at least on my Windows XP Pro). So in this case, we sleep here.
-      sleep(1);
-#endif // _WIN32
-    } else {
-      for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
-        if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) {
-          accept_new_connection(sp, ctx);
-        }
-      }
-    }
-  }
-  DEBUG_TRACE(("stopping workers"));
-
-  // Stop signal received: somebody called mg_stop. Quit.
-  close_all_listening_sockets(ctx);
-
-  // Wakeup workers that are waiting for connections to handle.
-  pthread_cond_broadcast(&ctx->sq_full);
-
-  // Wait until all threads finish
-  (void) pthread_mutex_lock(&ctx->mutex);
-  while (ctx->num_threads > 0) {
-    (void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
-  }
-  (void) pthread_mutex_unlock(&ctx->mutex);
-
-  // All threads exited, no sync is needed. Destroy mutex and condvars
-  (void) pthread_mutex_destroy(&ctx->mutex);
-  (void) pthread_cond_destroy(&ctx->cond);
-  (void) pthread_cond_destroy(&ctx->sq_empty);
-  (void) pthread_cond_destroy(&ctx->sq_full);
-
-#if !defined(NO_SSL)
-  uninitialize_ssl(ctx);
-#endif
-
-  // Signal mg_stop() that we're done
-  ctx->stop_flag = 2;
-
-  DEBUG_TRACE(("exiting"));
-}
-
-static void free_context(struct mg_context *ctx) {
-  int i;
-
-  // Deallocate config parameters
-  for (i = 0; i < NUM_OPTIONS; i++) {
-    if (ctx->config[i] != NULL)
-      free(ctx->config[i]);
-  }
-
-  // Deallocate SSL context
-  if (ctx->ssl_ctx != NULL) {
-    SSL_CTX_free(ctx->ssl_ctx);
-  }
-#ifndef NO_SSL
-  if (ssl_mutexes != NULL) {
-    free(ssl_mutexes);
-  }
-#endif // !NO_SSL
-
-  // Deallocate context itself
-  free(ctx);
-}
-
-void mg_stop(struct mg_context *ctx) {
-  ctx->stop_flag = 1;
-
-  // Wait until mg_fini() stops
-  while (ctx->stop_flag != 2) {
-    (void) sleep(0);
-  }
-  free_context(ctx);
-
-#if defined(_WIN32) && !defined(__SYMBIAN32__)
-  (void) WSACleanup();
-#endif // _WIN32
-}
-
-struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
-                            const char **options) {
-  struct mg_context *ctx;
-  const char *name, *value, *default_value;
-  int i;
-
-#if defined(_WIN32) && !defined(__SYMBIAN32__)
-  WSADATA data;
-  WSAStartup(MAKEWORD(2,2), &data);
-#endif // _WIN32
-
-  // Allocate context and initialize reasonable general case defaults.
-  // TODO(lsm): do proper error handling here.
-  ctx = (struct mg_context *) calloc(1, sizeof(*ctx));
-  ctx->user_callback = user_callback;
-  ctx->user_data = user_data;
-
-  while (options && (name = *options++) != NULL) {
-    if ((i = get_option_index(name)) == -1) {
-      cry(fc(ctx), "Invalid option: %s", name);
-      free_context(ctx);
-      return NULL;
-    } else if ((value = *options++) == NULL) {
-      cry(fc(ctx), "%s: option value cannot be NULL", name);
-      free_context(ctx);
-      return NULL;
-    }
-    ctx->config[i] = mg_strdup(value);
-    DEBUG_TRACE(("[%s] -> [%s]", name, value));
-  }
-
-  // Set default value if needed
-  for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
-    default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
-    if (ctx->config[i] == NULL && default_value != NULL) {
-      ctx->config[i] = mg_strdup(default_value);
-      DEBUG_TRACE(("Setting default: [%s] -> [%s]",
-                   config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
-                   default_value));
-    }
-  }
-
-  // NOTE(lsm): order is important here. SSL certificates must
-  // be initialized before listening ports. UID must be set last.
-  if (!set_gpass_option(ctx) ||
-#if !defined(NO_SSL)
-      !set_ssl_option(ctx) ||
-#endif
-      !set_ports_option(ctx) ||
-#if !defined(_WIN32)
-      !set_uid_option(ctx) ||
-#endif
-      !set_acl_option(ctx)) {
-    free_context(ctx);
-    return NULL;
-  }
-
-#if !defined(_WIN32) && !defined(__SYMBIAN32__)
-  // Ignore SIGPIPE signal, so if browser cancels the request, it
-  // won't kill the whole process.
-  (void) signal(SIGPIPE, SIG_IGN);
-#endif // !_WIN32
-
-  (void) pthread_mutex_init(&ctx->mutex, NULL);
-  (void) pthread_cond_init(&ctx->cond, NULL);
-  (void) pthread_cond_init(&ctx->sq_empty, NULL);
-  (void) pthread_cond_init(&ctx->sq_full, NULL);
-
-  // Start master (listening) thread
-  start_thread(ctx, (mg_thread_func_t) master_thread, ctx);
-
-  // Start worker threads
-  for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
-    if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) {
-      cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);
-    } else {
-      ctx->num_threads++;
-    }
-  }
-
-  return ctx;
-}