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