New FileSystemURL cracking

webkit/fileapi/file_system_context.h

 // 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.
 
 #ifndef WEBKIT_FILEAPI_FILE_SYSTEM_CONTEXT_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_CONTEXT_H_
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "webkit/fileapi/file_system_types.h"
+#include "webkit/fileapi/file_system_url.h"
 #include "webkit/fileapi/task_runner_bound_observer_list.h"
 #include "webkit/storage/webkit_storage_export.h"
 
 class FilePath;
 
 namespace quota {
 class QuotaManagerProxy;
 class SpecialStoragePolicy;
 }
 
 namespace webkit_blob {
 class FileStreamReader;
 }
 
 namespace fileapi {
 
 class ExternalFileSystemMountPointProvider;
+class ExternalMountPoints;
 class FileSystemFileUtil;
 class FileSystemMountPointProvider;
 class FileSystemOperation;
 class FileSystemOptions;
 class FileSystemQuotaUtil;
 class FileSystemTaskRunners;
 class FileSystemURL;
 class IsolatedMountPointProvider;
 class LocalFileChangeTracker;
+class LocalFileSyncContext;
+class MountPoints;
 class SandboxMountPointProvider;
-class LocalFileSyncContext;
 
 struct DefaultContextDeleter;
 
 // This class keeps and provides a file system context for FileSystem API.
 // An instance of this class is created and owned by profile.
 class WEBKIT_STORAGE_EXPORT FileSystemContext
     : public base::RefCountedThreadSafe<FileSystemContext,
                                         DefaultContextDeleter> {
  public:
   // task_runners->file_task_runner() is used as default TaskRunner.
@@ skipping 76 matching lines @@
       bool create,
       const OpenFileSystemCallback& callback);
 
   // Deletes the filesystem for the given |origin_url| and |type|. This should
   // be called on the IO Thread.
   void DeleteFileSystem(
       const GURL& origin_url,
       FileSystemType type,
       const DeleteFileSystemCallback& callback);
 
-  // Creates a new FileSystemOperation instance by cracking
-  // the given filesystem URL |url| to get an appropriate MountPointProvider
-  // and calling the provider's corresponding CreateFileSystemOperation method.
+  // Creates a new FileSystemOperation instance by getting an appropriate
+  // MountPointProvider for |url| and calling the provider's corresponding
+  // CreateFileSystemOperation method.
   // The resolved MountPointProvider could perform further specialization
   // depending on the filesystem type pointed by the |url|.
   FileSystemOperation* CreateFileSystemOperation(
       const FileSystemURL& url,
       base::PlatformFileError* error_code);
 
   // Creates new FileStreamReader instance to read a file pointed by the given
   // filesystem URL |url| starting from |offset|. |expected_modification_time|
   // specifies the expected last modification if the value is non-null, the
   // reader will check the underlying file's actual modification time to see if
@@ skipping 16 matching lines @@
   FileSystemTaskRunners* task_runners() { return task_runners_.get(); }
 
   LocalFileChangeTracker* change_tracker() { return change_tracker_.get(); }
   void SetLocalFileChangeTracker(scoped_ptr<LocalFileChangeTracker> tracker);
 
   LocalFileSyncContext* sync_context() { return sync_context_.get(); }
   void set_sync_context(LocalFileSyncContext* sync_context);
 
   const FilePath& partition_path() const { return partition_path_; }
 
+  // Same as |CrackFileSystemURL|, but cracks FileSystemURL created from |url|.
+  FileSystemURL CrackURL(const GURL& url) const;
+  // Same as |CrackFileSystemURL|, but cracks FileSystemURL created from method
+  // arguments.
+  FileSystemURL CreateCrackedFileSystemURL(const GURL& origin,
+                                           FileSystemType type,
+                                           const FilePath& path) const;
+
  private:
   friend struct DefaultContextDeleter;
   friend class base::DeleteHelper<FileSystemContext>;
   friend class base::RefCountedThreadSafe<FileSystemContext,
                                           DefaultContextDeleter>;
   ~FileSystemContext();
 
   void DeleteOnCorrectThread() const;
 
+  // For non-cracked isolated and external mount points, returns a FileSystemURL
+  // created by cracking |url|. The url is cracked using MountPoints registered
+  // as |url_crackers_|. If the url cannot be cracked, returns invalid
+  // FileSystemURL.
+  //
+  // If the original url does not point to an isolated or external filesystem,
+  // returns the original url, without attempting to crack it.
+  FileSystemURL CrackFileSystemURL(const FileSystemURL& url) const;
+
   scoped_ptr<FileSystemTaskRunners> task_runners_;
 
   scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
 
   // Regular mount point providers.
   scoped_ptr<SandboxMountPointProvider> sandbox_provider_;
   scoped_ptr<IsolatedMountPointProvider> isolated_provider_;
   scoped_ptr<ExternalFileSystemMountPointProvider> external_provider_;
 
   // Registered mount point providers.
   std::map<FileSystemType, FileSystemMountPointProvider*> provider_map_;
 
+  // MountPoints used to crack FileSystemURLs. The MountPoints are ordered
+  // in order they should try to crack a FileSystemURL.
+  std::vector<MountPoints*> url_crackers_;
+
   // The base path of the storage partition for this context.
   const FilePath partition_path_;
 
   // For syncable file systems.
   scoped_ptr<LocalFileChangeTracker> change_tracker_;
   scoped_refptr<LocalFileSyncContext> sync_context_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemContext);
 };
 
 struct DefaultContextDeleter {
   static void Destruct(const FileSystemContext* context) {
     context->DeleteOnCorrectThread();
   }
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_CONTEXT_H_