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// Copyright (c) 2011 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/chromeos/fileapi/cros_mount_point_provider.h"
#include "base/logging.h"
#include "base/memory/scoped_callback_factory.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "base/message_loop_proxy.h"
#include "base/stringprintf.h"
#include "base/synchronization/lock.h"
#include "base/utf_string_conversions.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFileSystem.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
#include "webkit/chromeos/fileapi/file_access_permissions.h"
#include "webkit/fileapi/file_system_path_manager.h"
#include "webkit/fileapi/file_system_util.h"
#include "webkit/glue/webkit_glue.h"
namespace chromeos {
typedef struct {
const char* local_root_path;
const char* web_root_path;
} FixedExposedPaths;
const char kChromeUIScheme[] = "chrome";
// Top level file system elements exposed in FileAPI in ChromeOS:
FixedExposedPaths fixed_exposed_paths[] = {
{"/home/chronos/user/", "Downloads"},
{"/", "media"},
};
CrosMountPointProvider::CrosMountPointProvider(
scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy)
: special_storage_policy_(special_storage_policy),
file_access_permissions_(new FileAccessPermissions()) {
for (size_t i = 0; i < arraysize(fixed_exposed_paths); i++) {
mount_point_map_.insert(std::pair<std::string, FilePath>(
std::string(fixed_exposed_paths[i].web_root_path),
FilePath(std::string(fixed_exposed_paths[i].local_root_path))));
}
}
CrosMountPointProvider::~CrosMountPointProvider() {
}
// TODO(zelidrag) share with SandboxMountPointProvider impl.
std::string GetOriginIdentifierFromURL(
const GURL& url) {
WebKit::WebSecurityOrigin web_security_origin =
WebKit::WebSecurityOrigin::createFromString(UTF8ToUTF16(url.spec()));
return web_security_origin.databaseIdentifier().utf8();
}
bool CrosMountPointProvider::GetRootForVirtualPath(
const FilePath& virtual_path, FilePath* root_path) {
std::vector<FilePath::StringType> components;
virtual_path.GetComponents(&components);
if (components.size() < 1) {
return false;
}
base::AutoLock locker(lock_);
// Check if this root mount point is exposed by this provider.
MountPointMap::iterator iter = mount_point_map_.find(components[0]);
if (iter == mount_point_map_.end()) {
return false;
}
*root_path = iter->second;
return true;
}
void CrosMountPointProvider::ValidateFileSystemRootAndGetURL(
const GURL& origin_url,
fileapi::FileSystemType type,
bool create,
fileapi::FileSystemPathManager::GetRootPathCallback* callback_ptr) {
DCHECK(type == fileapi::kFileSystemTypeExternal);
std::string name(GetOriginIdentifierFromURL(origin_url));
name += ':';
name += fileapi::kExternalName;
FilePath root_path;
root_path = FilePath(fileapi::kExternalDir);
callback_ptr->Run(true, root_path, name);
}
FilePath CrosMountPointProvider::ValidateFileSystemRootAndGetPathOnFileThread(
const GURL& origin_url,
fileapi::FileSystemType type,
const FilePath& virtual_path,
bool create) {
DCHECK(type == fileapi::kFileSystemTypeExternal);
FilePath root_path;
if (!GetRootForVirtualPath(virtual_path, &root_path))
return FilePath();
return root_path;
}
// TODO(zelidrag): Share this code with SandboxMountPointProvider impl.
bool CrosMountPointProvider::IsRestrictedFileName(const FilePath& path) const {
return false;
}
bool CrosMountPointProvider::IsAccessAllowed(const GURL& origin_url,
fileapi::FileSystemType type,
const FilePath& virtual_path) {
if (type != fileapi::kFileSystemTypeExternal)
return false;
// Permit access to mount points from internal WebUI.
if (origin_url.SchemeIs(kChromeUIScheme))
return true;
std::string extension_id = origin_url.host();
// Check first to make sure this extension has fileBrowserHander permissions.
if (!special_storage_policy_->IsFileHandler(extension_id))
return false;
return file_access_permissions_->HasAccessPermission(extension_id,
virtual_path);
}
void CrosMountPointProvider::AddMountPoint(FilePath mount_point) {
base::AutoLock locker(lock_);
mount_point_map_.insert(std::pair<std::string, FilePath>(
mount_point.BaseName().value(), mount_point.DirName()));
}
void CrosMountPointProvider::RemoveMountPoint(FilePath mount_point) {
base::AutoLock locker(lock_);
mount_point_map_.erase(mount_point.BaseName().value());
}
void CrosMountPointProvider::GrantFullAccessToExtension(
const std::string& extension_id) {
DCHECK(special_storage_policy_->IsFileHandler(extension_id));
if (!special_storage_policy_->IsFileHandler(extension_id))
return;
for (MountPointMap::const_iterator iter = mount_point_map_.begin();
iter != mount_point_map_.end();
++iter) {
GrantFileAccessToExtension(extension_id, FilePath(iter->first));
}
}
void CrosMountPointProvider::GrantFileAccessToExtension(
const std::string& extension_id, const FilePath& virtual_path) {
// All we care about here is access from extensions for now.
DCHECK(special_storage_policy_->IsFileHandler(extension_id));
if (!special_storage_policy_->IsFileHandler(extension_id))
return;
file_access_permissions_->GrantAccessPermission(extension_id, virtual_path);
}
void CrosMountPointProvider::RevokeAccessForExtension(
const std::string& extension_id) {
file_access_permissions_->RevokePermissions(extension_id);
}
std::vector<FilePath> CrosMountPointProvider::GetRootDirectories() const {
std::vector<FilePath> root_dirs;
for (MountPointMap::const_iterator iter = mount_point_map_.begin();
iter != mount_point_map_.end();
++iter) {
root_dirs.push_back(iter->second.Append(iter->first));
}
return root_dirs;
}
} // namespace chromeos
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