net/url_request/file_protocol_handler.cc

   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 "net/url_request/file_protocol_handler.h"
   6
   7 #include "base/logging.h"
   8 #include "base/task_runner.h"
   9 #include "net/base/filename_util.h"
  10 #include "net/base/net_errors.h"
  11 #include "net/url_request/url_request.h"
  12 #include "net/url_request/url_request_error_job.h"
  13 #include "net/url_request/url_request_file_dir_job.h"
  14 #include "net/url_request/url_request_file_job.h"
  15
  16 namespace net {
  17
  18 FileProtocolHandler::FileProtocolHandler(
  19     const scoped_refptr<base::TaskRunner>& file_task_runner)
  20     : file_task_runner_(file_task_runner) {}
  21
  22 FileProtocolHandler::~FileProtocolHandler() {}
  23
  24 URLRequestJob* FileProtocolHandler::MaybeCreateJob(
  25     URLRequest* request, NetworkDelegate* network_delegate) const {
  26   base::FilePath file_path;
  27   const bool is_file = FileURLToFilePath(request->url(), &file_path);
  28
  29   // Check file access permissions.
  30   if (!network_delegate ||
  31       !network_delegate->CanAccessFile(*request, file_path)) {
  32     return new URLRequestErrorJob(request, network_delegate, ERR_ACCESS_DENIED);
  33   }
  34
  35   // We need to decide whether to create URLRequestFileJob for file access or
  36   // URLRequestFileDirJob for directory access. To avoid accessing the
  37   // filesystem, we only look at the path string here.
  38   // The code in the URLRequestFileJob::Start() method discovers that a path,
  39   // which doesn't end with a slash, should really be treated as a directory,
  40   // and it then redirects to the URLRequestFileDirJob.
  41   if (is_file &&
  42       file_path.EndsWithSeparator() &&
  43       file_path.IsAbsolute()) {
  44     return new URLRequestFileDirJob(request, network_delegate, file_path);
  45   }
  46
  47   // Use a regular file request job for all non-directories (including invalid
  48   // file names).
  49   return new URLRequestFileJob(request, network_delegate, file_path,
  50                                file_task_runner_);
  51 }
  52
  53 bool FileProtocolHandler::IsSafeRedirectTarget(const GURL& location) const {
  54   return false;
  55 }
  56
  57 }  // namespace net