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 "base/metrics/histogram_macros.h"
   9 #include "base/metrics/sparse_histogram.h"
  10 #include "google_apis/drive/drive_api_error_codes.h"
  11 #include "google_apis/drive/drive_api_requests.h"
  12 #include "google_apis/drive/request_sender.h"
  13
  14 namespace google_apis {
  15
  16 FilesListRequestRunner::FilesListRequestRunner(
  17     RequestSender* request_sender,
  18     const google_apis::DriveApiUrlGenerator& url_generator)
  19     : request_sender_(request_sender),
  20       url_generator_(url_generator),
  21       weak_ptr_factory_(this) {
  22 }
  23
  24 FilesListRequestRunner::~FilesListRequestRunner() {
  25 }
  26
  27 CancelCallback FilesListRequestRunner::CreateAndStartWithSizeBackoff(
  28     int max_results,
  29     const std::string& q,
  30     const std::string& fields,
  31     const FileListCallback& callback) {
  32   UMA_HISTOGRAM_COUNTS_1000("Drive.FilesListRequestRunner.MaxResults",
  33                             max_results);
  34   base::Closure* const cancel_callback = new base::Closure;
  35   drive::FilesListRequest* const request = new drive::FilesListRequest(
  36       request_sender_, url_generator_,
  37       base::Bind(&FilesListRequestRunner::OnCompleted,
  38                  weak_ptr_factory_.GetWeakPtr(), max_results, q, fields,
  39                  callback, base::Owned(cancel_callback)));
  40   request->set_max_results(max_results);
  41   request->set_q(q);
  42   request->set_fields(fields);
  43   *cancel_callback = request_sender_->StartRequestWithAuthRetry(request);
  44
  45   // The cancellation callback is owned by the completion callback, so it must
  46   // not be used after |callback| is called.
  47   return base::Bind(&FilesListRequestRunner::OnCancel,
  48                     weak_ptr_factory_.GetWeakPtr(),
  49                     base::Unretained(cancel_callback));
  50 }
  51
  52 void FilesListRequestRunner::OnCancel(base::Closure* cancel_callback) {
  53   DCHECK(cancel_callback);
  54   DCHECK(!cancel_callback->is_null());
  55   cancel_callback->Run();
  56 }
  57
  58 void FilesListRequestRunner::OnCompleted(int max_results,
  59                                          const std::string& q,
  60                                          const std::string& fields,
  61                                          const FileListCallback& callback,
  62                                          CancelCallback* cancel_callback,
  63                                          DriveApiErrorCode error,
  64                                          scoped_ptr<FileList> entry) {
  65   if (!request_completed_callback_for_testing_.is_null())
  66     request_completed_callback_for_testing_.Run();
  67
  68   UMA_HISTOGRAM_SPARSE_SLOWLY(
  69       "Drive.FilesListRequestRunner.ApiErrorCode", error);
  70
  71   if (error == google_apis::DRIVE_RESPONSE_TOO_LARGE && max_results > 1) {
  72     CreateAndStartWithSizeBackoff(max_results / 2, q, fields, callback);
  73     return;
  74   }
  75
  76   callback.Run(error, entry.Pass());
  77 }
  78
  79 void FilesListRequestRunner::SetRequestCompletedCallbackForTesting(
  80     const base::Closure& callback) {
  81   request_completed_callback_for_testing_ = callback;
  82 }
  83
  84 }  // namespace google_apis