Drive: Add BatchableRequest subclass.

google_apis/drive/base_requests.h

 // Copyright (c) 2012 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.
 //
 // This file provides base classes used to issue HTTP requests for Google
 // APIs.
 
 #ifndef GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_
 #define GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_
 
@@ skipping 240 matching lines @@
 
   base::ThreadChecker thread_checker_;
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<UrlFetchRequestBase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UrlFetchRequestBase);
 };
 
+//============================ BatchableRequestBase ============================
+
+class BatchableRequestBase : public UrlFetchRequestBase {
+ public:
+  explicit BatchableRequestBase(RequestSender* sender) :
+      UrlFetchRequestBase(sender) {}
+
+  GURL GetURL() const override = 0;
+  net::URLFetcher::RequestType GetRequestType() const override;
+  std::vector<std::string> GetExtraRequestHeaders() const override;
+  void Prepare(const PrepareCallback& callback) override;
+  bool GetContentData(std::string* upload_content_type,
+                      std::string* upload_content) override;
+  void RunCallbackOnPrematureFailure(DriveApiErrorCode code) override = 0;
+  virtual void ProcessURLFetchResults(
+      DriveApiErrorCode code, const std::string& body) = 0;
+
+ private:
+  void ProcessURLFetchResults(const net::URLFetcher* source) final;
+};
+
 //============================ EntryActionRequest ============================
 
 // Callback type for requests that return only error status, like: Delete/Move.
 typedef base::Callback<void(DriveApiErrorCode error)> EntryActionCallback;
 
 // This class performs a simple action over a given entry (document/file).
 // It is meant to be used for requests that return no JSON blobs.
 class EntryActionRequest : public UrlFetchRequestBase {
  public:
   // |callback| is called when the request is finished either by success or by
@@ skipping 197 matching lines @@
  private:
   const int64 content_length_;
 
   DISALLOW_COPY_AND_ASSIGN(GetUploadStatusRequestBase);
 };
 
 //=========================== MultipartUploadRequestBase=======================
 
 // This class provides base implementation for performing the request for
 // uploading a file by multipart body.
-class MultipartUploadRequestBase : public UrlFetchRequestBase {
+class MultipartUploadRequestBase : public BatchableRequestBase {
  public:
   // Set boundary. Only tests can use this method.
   void SetBoundaryForTesting(const std::string& boundary);
 
  protected:
   // |callback| will be called with the file resource.upload URL.
   // |content_type| and |content_length| should be the attributes of the
   // uploading file. Other parameters are optional and can be empty or null
   // depending on Upload URL provided by the subclasses.
   MultipartUploadRequestBase(RequestSender* sender,
                              const std::string& metadata_json,
                              const std::string& content_type,
                              int64 content_length,
                              const base::FilePath& local_file_path,
                              const FileResourceCallback& callback,
                              const ProgressCallback& progress_callback);
   ~MultipartUploadRequestBase() override;
 
   // Overridden from UrlFetchRequestBase.
   void Prepare(const PrepareCallback& callback) override;
   bool GetContentData(std::string* upload_content_type,
                       std::string* upload_content) override;
-  void ProcessURLFetchResults(const net::URLFetcher* source) override;
+  void ProcessURLFetchResults(
+      DriveApiErrorCode code, const std::string& body) override;
   void RunCallbackOnPrematureFailure(DriveApiErrorCode code) override;
 
   // content::UrlFetcherDelegate overrides.
   void OnURLFetchUploadProgress(const net::URLFetcher* source,
                                 int64 current,
                                 int64 total) override;
 
   // Parses the response value and invokes |callback_| with |FileResource|.
   void OnDataParsed(DriveApiErrorCode code, scoped_ptr<base::Value> value);
 
@@ skipping 80 matching lines @@
   const ProgressCallback progress_callback_;
   const GURL download_url_;
   const base::FilePath output_file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileRequestBase);
 };
 
 }  // namespace google_apis
 
 #endif  // GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_