google_apis/drive/files_list_request_runner.cc

   1 // Copyright 2015 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 "google_apis/drive/files_list_request_runner.h"
   6
   7 #include "base/bind.h"
   8 #include "google_apis/drive/drive_api_error_codes.h"
   9 #include "google_apis/drive/drive_api_requests.h"
  10 #include "google_apis/drive/request_sender.h"
  11
  12 namespace google_apis {
  13
  14 FilesListRequestRunner::FilesListRequestRunner(
  15     RequestSender* request_sender,
  16     const google_apis::DriveApiUrlGenerator& url_generator)
  17     : request_sender_(request_sender),
  18       url_generator_(url_generator),
  19       weak_ptr_factory_(this) {
  20 }
  21
  22 FilesListRequestRunner::~FilesListRequestRunner() {
  23 }
  24
  25 CancelCallback FilesListRequestRunner::CreateAndStartWithSizeBackoff(
  26     int max_results,
  27     const std::string& q,
  28     const std::string& fields,
  29     const FileListCallback& callback) {
  30   base::Closure* const cancel_callback = new base::Closure;
  31   drive::FilesListRequest* const request = new drive::FilesListRequest(
  32       request_sender_, url_generator_,
  33       base::Bind(&FilesListRequestRunner::OnCompleted,
  34                  weak_ptr_factory_.GetWeakPtr(), max_results, q, fields,
  35                  callback, base::Owned(cancel_callback)));
  36   request->set_max_results(max_results);
  37   request->set_q(q);
  38   request->set_fields(fields);
  39   *cancel_callback = request_sender_->StartRequestWithAuthRetry(request);
  40
  41   // The cancellation callback is owned by the completion callback, so it must
  42   // not be used after |callback| is called.
  43   return base::Bind(&FilesListRequestRunner::OnCancel,
  44                     weak_ptr_factory_.GetWeakPtr(),
  45                     base::Unretained(cancel_callback));
  46 }
  47
  48 void FilesListRequestRunner::OnCancel(base::Closure* cancel_callback) {
  49   DCHECK(cancel_callback);
  50   DCHECK(!cancel_callback->is_null());
  51   cancel_callback->Run();
  52 }
  53
  54 void FilesListRequestRunner::OnCompleted(int max_results,
  55                                          const std::string& q,
  56                                          const std::string& fields,
  57                                          const FileListCallback& callback,
  58                                          CancelCallback* cancel_callback,
  59                                          DriveApiErrorCode error,
  60                                          scoped_ptr<FileList> entry) {
  61   if (!request_completed_callback_for_testing_.is_null())
  62     request_completed_callback_for_testing_.Run();
  63
  64   if (error == google_apis::DRIVE_RESPONSE_TOO_LARGE && max_results > 1) {
  65     CreateAndStartWithSizeBackoff(max_results / 2, q, fields, callback);
  66     return;
  67   }
  68
  69   callback.Run(error, entry.Pass());
  70 }
  71
  72 void FilesListRequestRunner::SetRequestCompletedCallbackForTesting(
  73     const base::Closure& callback) {
  74   request_completed_callback_for_testing_ = callback;
  75 }
  76
  77 }  // namespace google_apis