New FileSystemURL cracking

webkit/fileapi/file_system_url.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/fileapi/file_system_url.h"
 
 #include <sstream>
 
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "net/base/escape.h"
 #include "webkit/fileapi/external_mount_points.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/fileapi/file_system_util.h"
 #include "webkit/fileapi/isolated_context.h"
 
 namespace fileapi {
 
 namespace {
 
-bool CrackFileSystemURL(
-    const GURL& url,
-    GURL* origin_url,
-    FileSystemType* type,
-    FilePath* file_path) {
+bool ParseFileSystemURL(const GURL& url,
+                        GURL* origin_url,
+                        FileSystemType* type,
+                        FilePath* file_path) {
   GURL origin;
   FileSystemType file_system_type = kFileSystemTypeUnknown;
 
   if (!url.is_valid() || !url.SchemeIsFileSystem())
     return false;
   DCHECK(url.inner_url());
 
   std::string inner_path = url.inner_url()->path();
 
   const struct {
     FileSystemType type;
     const char* dir;
   } kValidTypes[] = {
     { kFileSystemTypePersistent, kPersistentDir },
     { kFileSystemTypeTemporary, kTemporaryDir },
     { kFileSystemTypeIsolated, kIsolatedDir },
     { kFileSystemTypeExternal, kExternalDir },
     { kFileSystemTypeTest, kTestDir },
   };
+
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kValidTypes); ++i) {
     if (StartsWithASCII(inner_path, kValidTypes[i].dir, true)) {
       file_system_type = kValidTypes[i].type;
       break;
     }
   }
 
   if (file_system_type == kFileSystemTypeUnknown)
     return false;
 
@@ skipping 18 matching lines @@
   if (file_path)
     *file_path = converted_path.NormalizePathSeparators().
         StripTrailingSeparators();
 
   return true;
 }
 
 }  // namespace
 
 FileSystemURL::FileSystemURL()
-    : type_(kFileSystemTypeUnknown),
-      mount_type_(kFileSystemTypeUnknown),
-      is_valid_(false) {}
+    : is_valid_(false),
+      type_(kFileSystemTypeUnknown),
+      mount_type_(kFileSystemTypeUnknown) {
+}
+
+// static
+FileSystemURL FileSystemURL::CreateForTest(const GURL& url) {
+  return FileSystemURL(url);
+}
+
+FileSystemURL FileSystemURL::CreateForTest(const GURL& origin,
+                                           FileSystemType type,
+                                           const FilePath& path) {
+  return FileSystemURL(origin, type, path);
+}
 
 FileSystemURL::FileSystemURL(const GURL& url)
-    : type_(kFileSystemTypeUnknown) {
-  is_valid_ = CrackFileSystemURL(url, &origin_, &type_, &virtual_path_);
-  MayCrackIsolatedPath();
+    : type_(kFileSystemTypeUnknown),
+      mount_type_(kFileSystemTypeUnknown) {
+  is_valid_ = ParseFileSystemURL(url, &origin_, &type_, &path_);
+  mount_type_ = type_;
 }
 
-FileSystemURL::FileSystemURL(
-    const GURL& origin,
-    FileSystemType type,
-    const FilePath& path)
-    : origin_(origin),
+FileSystemURL::FileSystemURL(const GURL& origin,
+                             FileSystemType type,
+                             const FilePath& path)
+    : is_valid_(true),
+      origin_(origin),
       type_(type),
-      virtual_path_(path.NormalizePathSeparators()),
-      is_valid_(true) {
-  MayCrackIsolatedPath();
+      path_(path.NormalizePathSeparators()),
+      mount_type_(type) {
+}
+
+FileSystemURL::FileSystemURL(const GURL& origin,
+                             FileSystemType original_type,
+                             const FilePath& original_path,
+                             const std::string& filesystem_id,
+                             FileSystemType cracked_type,
+                             const FilePath& cracked_path)
+    : is_valid_(true),
+      origin_(origin),
+      type_(cracked_type),
+      path_(cracked_path.NormalizePathSeparators()),
+      filesystem_id_(filesystem_id),
+      mount_type_(original_type),
+      virtual_path_(original_path) {
 }
 
 FileSystemURL::~FileSystemURL() {}
 
+// static
+FileSystemURL FileSystemURL::CreateForCrackedURL(
+    const FileSystemURL& original,
+    const std::string& filesystem_id,
+    FileSystemType cracked_type,
+    const FilePath& cracked_path) {
+  if (!original.is_valid())
+    return FileSystemURL();
+  return FileSystemURL(original.origin(),
+                       original.type(),
+                       original.path(),
+                       filesystem_id,
+                       cracked_type,
+                       cracked_path);
+}
+
 std::string FileSystemURL::DebugString() const {
   if (!is_valid_)
     return "invalid filesystem: URL";
   std::ostringstream ss;
   ss << GetFileSystemRootURI(origin_, mount_type_);
-  if (!virtual_path_.empty())
+
+  // filesystem_id_ will be non empty for (and only for) cracked URLs.
+  if (!filesystem_id_.empty()) {
     ss << virtual_path_.value();
-  if (type_ != mount_type_ || path_ != virtual_path_) {
     ss << " (";
     ss << GetFileSystemTypeString(type_) << "@" << filesystem_id_ << ":";
     ss << path_.value();
     ss << ")";
+  } else {
+    ss << path_.value();
   }
   return ss.str();
 }
 
 FileSystemURL FileSystemURL::WithPath(const FilePath& path) const {
   FileSystemURL url = *this;
   url.path_ = path;
   url.virtual_path_.clear();
   return url;
 }
@@ skipping 18 matching lines @@
   DCHECK(lhs.is_valid_ && rhs.is_valid_);
   if (lhs.origin_ != rhs.origin_)
     return lhs.origin_ < rhs.origin_;
   if (lhs.type_ != rhs.type_)
     return lhs.type_ < rhs.type_;
   if (lhs.filesystem_id_ != rhs.filesystem_id_)
     return lhs.filesystem_id_ < rhs.filesystem_id_;
   return lhs.path_ < rhs.path_;
 }
 
-void FileSystemURL::MayCrackIsolatedPath() {
-  path_ = virtual_path_;
-  mount_type_ = type_;
-  if (is_valid_ && IsolatedContext::IsIsolatedType(type_)) {
-    // If the type is isolated, crack the path further to get the 'real'
-    // filesystem type and path.
-    is_valid_ = ExternalMountPoints::GetSystemInstance()->CrackVirtualPath(
-        virtual_path_, &filesystem_id_, &type_, &path_);
-    if (is_valid_)
-      return;
-    is_valid_ = IsolatedContext::GetInstance()->CrackVirtualPath(
-        virtual_path_, &filesystem_id_, &type_, &path_);
-  }
-}
-
 }  // namespace fileapi