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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/browser/sync/engine/net/server_connection_manager.h" | |
| 6 | |
| 7 #include <errno.h> | |
| 8 | |
| 9 #include <ostream> | |
| 10 #include <string> | |
| 11 #include <vector> | |
| 12 | |
| 13 #include "base/command_line.h" | |
| 14 #include "build/build_config.h" | |
| 15 #include "chrome/browser/sync/engine/net/url_translator.h" | |
| 16 #include "chrome/browser/sync/engine/syncer.h" | |
| 17 #include "chrome/browser/sync/engine/syncproto.h" | |
| 18 #include "googleurl/src/gurl.h" | |
| 19 #include "net/http/http_status_code.h" | |
| 20 #include "sync/protocol/sync.pb.h" | |
| 21 | |
| 22 namespace browser_sync { | |
| 23 | |
| 24 using std::ostream; | |
| 25 using std::string; | |
| 26 using std::vector; | |
| 27 | |
| 28 static const char kSyncServerSyncPath[] = "/command/"; | |
| 29 | |
| 30 // At the /time/ path of the sync server, we expect to find a very simple | |
| 31 // time of day service that we can use to synchronize the local clock with | |
| 32 // server time. | |
| 33 static const char kSyncServerGetTimePath[] = "/time"; | |
| 34 | |
| 35 HttpResponse::HttpResponse() | |
| 36 : response_code(kUnsetResponseCode), | |
| 37 content_length(kUnsetContentLength), | |
| 38 payload_length(kUnsetPayloadLength), | |
| 39 server_status(NONE) {} | |
| 40 | |
| 41 #define ENUM_CASE(x) case x: return #x; break | |
| 42 | |
| 43 const char* HttpResponse::GetServerConnectionCodeString( | |
| 44 ServerConnectionCode code) { | |
| 45 switch (code) { | |
| 46 ENUM_CASE(NONE); | |
| 47 ENUM_CASE(CONNECTION_UNAVAILABLE); | |
| 48 ENUM_CASE(IO_ERROR); | |
| 49 ENUM_CASE(SYNC_SERVER_ERROR); | |
| 50 ENUM_CASE(SYNC_AUTH_ERROR); | |
| 51 ENUM_CASE(SERVER_CONNECTION_OK); | |
| 52 ENUM_CASE(RETRY); | |
| 53 } | |
| 54 NOTREACHED(); | |
| 55 return ""; | |
| 56 } | |
| 57 | |
| 58 #undef ENUM_CASE | |
| 59 | |
| 60 ServerConnectionManager::Connection::Connection( | |
| 61 ServerConnectionManager* scm) : scm_(scm) { | |
| 62 } | |
| 63 | |
| 64 ServerConnectionManager::Connection::~Connection() { | |
| 65 } | |
| 66 | |
| 67 bool ServerConnectionManager::Connection::ReadBufferResponse( | |
| 68 string* buffer_out, | |
| 69 HttpResponse* response, | |
| 70 bool require_response) { | |
| 71 if (net::HTTP_OK != response->response_code) { | |
| 72 response->server_status = HttpResponse::SYNC_SERVER_ERROR; | |
| 73 return false; | |
| 74 } | |
| 75 | |
| 76 if (require_response && (1 > response->content_length)) | |
| 77 return false; | |
| 78 | |
| 79 const int64 bytes_read = ReadResponse(buffer_out, | |
| 80 static_cast<int>(response->content_length)); | |
| 81 if (bytes_read != response->content_length) { | |
| 82 response->server_status = HttpResponse::IO_ERROR; | |
| 83 return false; | |
| 84 } | |
| 85 return true; | |
| 86 } | |
| 87 | |
| 88 bool ServerConnectionManager::Connection::ReadDownloadResponse( | |
| 89 HttpResponse* response, | |
| 90 string* buffer_out) { | |
| 91 const int64 bytes_read = ReadResponse(buffer_out, | |
| 92 static_cast<int>(response->content_length)); | |
| 93 | |
| 94 if (bytes_read != response->content_length) { | |
| 95 LOG(ERROR) << "Mismatched content lengths, server claimed " << | |
| 96 response->content_length << ", but sent " << bytes_read; | |
| 97 response->server_status = HttpResponse::IO_ERROR; | |
| 98 return false; | |
| 99 } | |
| 100 return true; | |
| 101 } | |
| 102 | |
| 103 ServerConnectionManager::ScopedConnectionHelper::ScopedConnectionHelper( | |
| 104 ServerConnectionManager* manager, Connection* connection) | |
| 105 : manager_(manager), connection_(connection) {} | |
| 106 | |
| 107 ServerConnectionManager::ScopedConnectionHelper::~ScopedConnectionHelper() { | |
| 108 if (connection_.get()) | |
| 109 manager_->OnConnectionDestroyed(connection_.get()); | |
| 110 connection_.reset(); | |
| 111 } | |
| 112 | |
| 113 ServerConnectionManager::Connection* | |
| 114 ServerConnectionManager::ScopedConnectionHelper::get() { | |
| 115 return connection_.get(); | |
| 116 } | |
| 117 | |
| 118 namespace { | |
| 119 | |
| 120 string StripTrailingSlash(const string& s) { | |
| 121 int stripped_end_pos = s.size(); | |
| 122 if (s.at(stripped_end_pos - 1) == '/') { | |
| 123 stripped_end_pos = stripped_end_pos - 1; | |
| 124 } | |
| 125 | |
| 126 return s.substr(0, stripped_end_pos); | |
| 127 } | |
| 128 | |
| 129 } // namespace | |
| 130 | |
| 131 // TODO(chron): Use a GURL instead of string concatenation. | |
| 132 string ServerConnectionManager::Connection::MakeConnectionURL( | |
| 133 const string& sync_server, | |
| 134 const string& path, | |
| 135 bool use_ssl) const { | |
| 136 string connection_url = (use_ssl ? "https://" : "http://"); | |
| 137 connection_url += sync_server; | |
| 138 connection_url = StripTrailingSlash(connection_url); | |
| 139 connection_url += path; | |
| 140 | |
| 141 return connection_url; | |
| 142 } | |
| 143 | |
| 144 int ServerConnectionManager::Connection::ReadResponse(string* out_buffer, | |
| 145 int length) { | |
| 146 int bytes_read = buffer_.length(); | |
| 147 CHECK(length <= bytes_read); | |
| 148 out_buffer->assign(buffer_); | |
| 149 return bytes_read; | |
| 150 } | |
| 151 | |
| 152 ScopedServerStatusWatcher::ScopedServerStatusWatcher( | |
| 153 ServerConnectionManager* conn_mgr, HttpResponse* response) | |
| 154 : conn_mgr_(conn_mgr), | |
| 155 response_(response), | |
| 156 server_reachable_(conn_mgr->server_reachable_) { | |
| 157 response->server_status = conn_mgr->server_status_; | |
| 158 } | |
| 159 | |
| 160 ScopedServerStatusWatcher::~ScopedServerStatusWatcher() { | |
| 161 if (conn_mgr_->server_status_ != response_->server_status) { | |
| 162 conn_mgr_->server_status_ = response_->server_status; | |
| 163 conn_mgr_->NotifyStatusChanged(); | |
| 164 return; | |
| 165 } | |
| 166 // Notify if we've gone on or offline. | |
| 167 if (server_reachable_ != conn_mgr_->server_reachable_) | |
| 168 conn_mgr_->NotifyStatusChanged(); | |
| 169 } | |
| 170 | |
| 171 ServerConnectionManager::ServerConnectionManager( | |
| 172 const string& server, | |
| 173 int port, | |
| 174 bool use_ssl, | |
| 175 const string& user_agent) | |
| 176 : sync_server_(server), | |
| 177 sync_server_port_(port), | |
| 178 user_agent_(user_agent), | |
| 179 use_ssl_(use_ssl), | |
| 180 proto_sync_path_(kSyncServerSyncPath), | |
| 181 get_time_path_(kSyncServerGetTimePath), | |
| 182 server_status_(HttpResponse::NONE), | |
| 183 server_reachable_(false), | |
| 184 terminated_(false), | |
| 185 active_connection_(NULL) { | |
| 186 } | |
| 187 | |
| 188 ServerConnectionManager::~ServerConnectionManager() { | |
| 189 } | |
| 190 | |
| 191 ServerConnectionManager::Connection* | |
| 192 ServerConnectionManager::MakeActiveConnection() { | |
| 193 base::AutoLock lock(terminate_connection_lock_); | |
| 194 DCHECK(!active_connection_); | |
| 195 if (terminated_) | |
| 196 return NULL; | |
| 197 | |
| 198 active_connection_ = MakeConnection(); | |
| 199 return active_connection_; | |
| 200 } | |
| 201 | |
| 202 void ServerConnectionManager::OnConnectionDestroyed(Connection* connection) { | |
| 203 DCHECK(connection); | |
| 204 base::AutoLock lock(terminate_connection_lock_); | |
| 205 // |active_connection_| can be NULL already if it was aborted. Also, | |
| 206 // it can legitimately be a different Connection object if a new Connection | |
| 207 // was created after a previous one was Aborted and destroyed. | |
| 208 if (active_connection_ != connection) | |
| 209 return; | |
| 210 | |
| 211 active_connection_ = NULL; | |
| 212 } | |
| 213 | |
| 214 void ServerConnectionManager::NotifyStatusChanged() { | |
| 215 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 216 FOR_EACH_OBSERVER(ServerConnectionEventListener, listeners_, | |
| 217 OnServerConnectionEvent( | |
| 218 ServerConnectionEvent(server_status_, server_reachable_))); | |
| 219 } | |
| 220 | |
| 221 bool ServerConnectionManager::PostBufferWithCachedAuth( | |
| 222 PostBufferParams* params, ScopedServerStatusWatcher* watcher) { | |
| 223 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 224 string path = | |
| 225 MakeSyncServerPath(proto_sync_path(), MakeSyncQueryString(client_id_)); | |
| 226 return PostBufferToPath(params, path, auth_token(), watcher); | |
| 227 } | |
| 228 | |
| 229 bool ServerConnectionManager::PostBufferToPath(PostBufferParams* params, | |
| 230 const string& path, const string& auth_token, | |
| 231 ScopedServerStatusWatcher* watcher) { | |
| 232 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 233 DCHECK(watcher != NULL); | |
| 234 | |
| 235 if (auth_token.empty()) { | |
| 236 params->response.server_status = HttpResponse::SYNC_AUTH_ERROR; | |
| 237 return false; | |
| 238 } | |
| 239 | |
| 240 // When our connection object falls out of scope, it clears itself from | |
| 241 // active_connection_. | |
| 242 ScopedConnectionHelper post(this, MakeActiveConnection()); | |
| 243 if (!post.get()) { | |
| 244 params->response.server_status = HttpResponse::CONNECTION_UNAVAILABLE; | |
| 245 return false; | |
| 246 } | |
| 247 | |
| 248 // Note that |post| may be aborted by now, which will just cause Init to fail | |
| 249 // with CONNECTION_UNAVAILABLE. | |
| 250 bool ok = post.get()->Init( | |
| 251 path.c_str(), auth_token, params->buffer_in, ¶ms->response); | |
| 252 | |
| 253 if (params->response.server_status == HttpResponse::SYNC_AUTH_ERROR) | |
| 254 InvalidateAndClearAuthToken(); | |
| 255 | |
| 256 if (!ok || net::HTTP_OK != params->response.response_code) | |
| 257 return false; | |
| 258 | |
| 259 if (post.get()->ReadBufferResponse( | |
| 260 ¶ms->buffer_out, ¶ms->response, true)) { | |
| 261 params->response.server_status = HttpResponse::SERVER_CONNECTION_OK; | |
| 262 server_reachable_ = true; | |
| 263 return true; | |
| 264 } | |
| 265 return false; | |
| 266 } | |
| 267 | |
| 268 bool ServerConnectionManager::CheckTime(int32* out_time) { | |
| 269 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 270 | |
| 271 // Verify that the server really is reachable by checking the time. We need | |
| 272 // to do this because of wifi interstitials that intercept messages from the | |
| 273 // client and return HTTP OK instead of a redirect. | |
| 274 HttpResponse response; | |
| 275 ScopedServerStatusWatcher watcher(this, &response); | |
| 276 string post_body = "command=get_time"; | |
| 277 | |
| 278 for (int i = 0 ; i < 3; i++) { | |
| 279 ScopedConnectionHelper post(this, MakeActiveConnection()); | |
| 280 if (!post.get()) | |
| 281 break; | |
| 282 | |
| 283 // Note that the server's get_time path doesn't require authentication. | |
| 284 string get_time_path = | |
| 285 MakeSyncServerPath(kSyncServerGetTimePath, post_body); | |
| 286 DVLOG(1) << "Requesting get_time from:" << get_time_path; | |
| 287 | |
| 288 string blank_post_body; | |
| 289 bool ok = post.get()->Init(get_time_path.c_str(), blank_post_body, | |
| 290 blank_post_body, &response); | |
| 291 if (!ok) { | |
| 292 DVLOG(1) << "Unable to check the time"; | |
| 293 continue; | |
| 294 } | |
| 295 string time_response; | |
| 296 time_response.resize( | |
| 297 static_cast<string::size_type>(response.content_length)); | |
| 298 ok = post.get()->ReadDownloadResponse(&response, &time_response); | |
| 299 if (!ok || string::npos != | |
| 300 time_response.find_first_not_of("0123456789")) { | |
| 301 LOG(ERROR) << "unable to read a non-numeric response from get_time:" | |
| 302 << time_response; | |
| 303 continue; | |
| 304 } | |
| 305 *out_time = atoi(time_response.c_str()); | |
| 306 DVLOG(1) << "Server was reachable."; | |
| 307 return true; | |
| 308 } | |
| 309 return false; | |
| 310 } | |
| 311 | |
| 312 bool ServerConnectionManager::IsServerReachable() { | |
| 313 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 314 int32 time; | |
| 315 return CheckTime(&time); | |
| 316 } | |
| 317 | |
| 318 bool ServerConnectionManager::IsUserAuthenticated() { | |
| 319 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 320 return IsGoodReplyFromServer(server_status_); | |
| 321 } | |
| 322 | |
| 323 bool ServerConnectionManager::CheckServerReachable() { | |
| 324 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 325 const bool server_is_reachable = IsServerReachable(); | |
| 326 if (server_reachable_ != server_is_reachable) { | |
| 327 server_reachable_ = server_is_reachable; | |
| 328 NotifyStatusChanged(); | |
| 329 } | |
| 330 return server_is_reachable; | |
| 331 } | |
| 332 | |
| 333 void ServerConnectionManager::SetServerParameters(const string& server_url, | |
| 334 int port, | |
| 335 bool use_ssl) { | |
| 336 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 337 sync_server_ = server_url; | |
| 338 sync_server_port_ = port; | |
| 339 use_ssl_ = use_ssl; | |
| 340 } | |
| 341 | |
| 342 // Returns the current server parameters in server_url and port. | |
| 343 void ServerConnectionManager::GetServerParameters(string* server_url, | |
| 344 int* port, | |
| 345 bool* use_ssl) const { | |
| 346 if (server_url != NULL) | |
| 347 *server_url = sync_server_; | |
| 348 if (port != NULL) | |
| 349 *port = sync_server_port_; | |
| 350 if (use_ssl != NULL) | |
| 351 *use_ssl = use_ssl_; | |
| 352 } | |
| 353 | |
| 354 std::string ServerConnectionManager::GetServerHost() const { | |
| 355 string server_url; | |
| 356 int port; | |
| 357 bool use_ssl; | |
| 358 GetServerParameters(&server_url, &port, &use_ssl); | |
| 359 // For unit tests. | |
| 360 if (server_url.empty()) | |
| 361 return std::string(); | |
| 362 // We just want the hostname, so we don't need to switch on use_ssl. | |
| 363 server_url = "http://" + server_url; | |
| 364 GURL gurl(server_url); | |
| 365 DCHECK(gurl.is_valid()) << gurl; | |
| 366 return gurl.host(); | |
| 367 } | |
| 368 | |
| 369 void ServerConnectionManager::AddListener( | |
| 370 ServerConnectionEventListener* listener) { | |
| 371 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 372 listeners_.AddObserver(listener); | |
| 373 } | |
| 374 | |
| 375 void ServerConnectionManager::RemoveListener( | |
| 376 ServerConnectionEventListener* listener) { | |
| 377 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 378 listeners_.RemoveObserver(listener); | |
| 379 } | |
| 380 | |
| 381 ServerConnectionManager::Connection* ServerConnectionManager::MakeConnection() | |
| 382 { | |
| 383 return NULL; // For testing. | |
| 384 } | |
| 385 | |
| 386 void ServerConnectionManager::TerminateAllIO() { | |
| 387 base::AutoLock lock(terminate_connection_lock_); | |
| 388 terminated_ = true; | |
| 389 if (active_connection_) | |
| 390 active_connection_->Abort(); | |
| 391 | |
| 392 // Sever our ties to this connection object. Note that it still may exist, | |
| 393 // since we don't own it, but it has been neutered. | |
| 394 active_connection_ = NULL; | |
| 395 } | |
| 396 | |
| 397 bool FillMessageWithShareDetails(sync_pb::ClientToServerMessage* csm, | |
| 398 syncable::Directory* directory, | |
| 399 const std::string& share) { | |
| 400 string birthday = directory->store_birthday(); | |
| 401 if (!birthday.empty()) | |
| 402 csm->set_store_birthday(birthday); | |
| 403 csm->set_share(share); | |
| 404 return true; | |
| 405 } | |
| 406 | |
| 407 std::ostream& operator << (std::ostream& s, const struct HttpResponse& hr) { | |
| 408 s << " Response Code (bogus on error): " << hr.response_code; | |
| 409 s << " Content-Length (bogus on error): " << hr.content_length; | |
| 410 s << " Server Status: " << hr.server_status; | |
| 411 return s; | |
| 412 } | |
| 413 | |
| 414 } // namespace browser_sync | |
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Chromium Code Reviews
Issue 9699057:
[Sync] Move 'sync' target to sync/ (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src