New FileSystemURL cracking

webkit/fileapi/isolated_context.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/isolated_context.h"
 
 #include "base/file_path.h"
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/rand_util.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
+#include "webkit/fileapi/file_system_url.h"
 
 namespace fileapi {
 
 namespace {
 
 FilePath::StringType GetRegisterNameForPath(const FilePath& path) {
   // If it's not a root path simply return a base name.
   if (path.DirName() != path)
     return path.BaseName().value();
 
@@ skipping 193 matching lines @@
       register_name->assign(name);
   }
 
   base::AutoLock locker(lock_);
   std::string filesystem_id = GetNewFileSystemId();
   instance_map_[filesystem_id] = new Instance(type, MountPointInfo(name, path));
   path_to_id_map_[path].insert(filesystem_id);
   return filesystem_id;
 }
 
+bool IsolatedContext::HandlesFileSystemMountType(FileSystemType type) const {
+  return type == kFileSystemTypeIsolated;
+}
+
 bool IsolatedContext::RevokeFileSystem(const std::string& filesystem_id) {
   base::AutoLock locker(lock_);
   return UnregisterFileSystem(filesystem_id);
 }
 
 bool IsolatedContext::GetRegisteredPath(
     const std::string& filesystem_id, FilePath* path) const {
   DCHECK(path);
   base::AutoLock locker(lock_);
   IDToInstance::const_iterator found = instance_map_.find(filesystem_id);
@@ skipping 47 matching lines @@
     if (!instance->ResolvePathForName(name, &cracked_path))
       return false;
   }
 
   for (; component_iter != components.end(); ++component_iter)
     cracked_path = cracked_path.Append(*component_iter);
   *path = cracked_path;
   return true;
 }
 
+FileSystemURL IsolatedContext::CrackURL(const GURL& url) const {
+  FileSystemURL filesystem_url = FileSystemURL(url);
+  if (!filesystem_url.is_valid())
+    return FileSystemURL();
+  return CreateCrackedFileSystemURL(filesystem_url.origin(),
+                                    filesystem_url.mount_type(),
+                                    filesystem_url.path());
+}
+
+FileSystemURL IsolatedContext::CreateCrackedFileSystemURL(
+    const GURL& origin,
+    FileSystemType type,
+    const FilePath& path) const {
+  if (!HandlesFileSystemMountType(type))
+    return FileSystemURL();
+
+  std::string mount_name;
+  FileSystemType cracked_type;
+  FilePath cracked_path;
+  if (!CrackVirtualPath(path, &mount_name, &cracked_type, &cracked_path))
+    return FileSystemURL();
+
+  return FileSystemURL(origin, type, path,
+                       mount_name, cracked_type, cracked_path);
+}
+
 void IsolatedContext::RevokeFileSystemByPath(const FilePath& path_in) {
   base::AutoLock locker(lock_);
   FilePath path(path_in.NormalizePathSeparators());
   PathToID::iterator ids_iter = path_to_id_map_.find(path);
   if (ids_iter == path_to_id_map_.end())
     return;
   std::set<std::string>& ids = ids_iter->second;
   for (std::set<std::string>::iterator iter = ids.begin();
        iter != ids.end(); ++iter) {
     IDToInstance::iterator found = instance_map_.find(*iter);
@@ skipping 79 matching lines @@
   uint32 random_data[4];
   std::string id;
   do {
     base::RandBytes(random_data, sizeof(random_data));
     id = base::HexEncode(random_data, sizeof(random_data));
   } while (instance_map_.find(id) != instance_map_.end());
   return id;
 }
 
 }  // namespace fileapi