First round of dead file removal

experimental/conways_life/web_resource_loader.h

-// Copyright (c) 2011 The Native Client Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WEB_RESOURCE_LOADER_H_
-#define WEB_RESOURCE_LOADER_H_
-
-#include <string>
-
-#include "experimental/conways_life/threading/ref_count.h"
-#include "ppapi/cpp/completion_callback.h"
-#include "ppapi/cpp/url_loader.h"
-
-namespace pp {
-class Instance;
-class URLRequestInfo;
-}  // namespace pp
-
-namespace life {
-
-// WebResourceLoader handles downloading resources from URLs. It handles the
-// callbacks. It uses a delegate pattern to connect to the class that
-// is aggregating and interpreting the resource data. This Delegate class must
-// declare the following methods:
-//
-// OnWebResourceLoaderCallback:
-// Called at various times during the download process. The op_code indicates
-// what step has just been completed. The Delegate should return true to
-// continue the download process, or false to abort.
-//     bool OnWebResourceLoaderCallback(DispatchOpCode op_code,
-//                                      WebResourceLoader* loader);
-//
-// OnWebResourceLoaderError:
-// Called when an error occurs.
-//     void OnWebResourceLoaderError(int32_t error, WebResourceLoader* loader);
-//
-// OnWebResourceLoaderDone:
-// This is always the last method called, either after a successful download or
-// after an error.
-//     void OnWebResourceLoaderDone(WebResourceLoader* loader);
-template <class Delegate>
-class WebResourceLoader {
- public:
-  // DispatchOpCode used with Delegate::OnWebResourceLoaderCallback.
-  enum DispatchOpCode {
-    kUrlResponseInfoReady,  // URL response ready; query with GetResponseInfo.
-    kDataReceived,  // A chunk of data has been received in buffer.
-    kDownloadComplete  // Download done, data/file is ready for consumption.
-  };
-
-  WebResourceLoader(pp::Instance* instance, Delegate* delegate);
-  virtual ~WebResourceLoader();
-
-  // You can call this function from any thread or from Delegate method
-  // OnWebResourceLoaderDone to safely delete this loader instance.
-  void CloseAndDeleteSelf();
-
-  // Initiate a download from the given URL.
-  void LoadURL(const std::string& url);
-
-  // Buffer to receive the resource data. If no buffer is provided, a 4K
-  // internal buffer is used. Method set_content_buffer should be called
-  // before starting a download or from within one of the delegate methods.
-  void set_content_buffer(char* buffer, size_t size);
-  const char* buffer() const { return buffer_; }
-  int32_t data_size() const { return data_size_; }
-
-  // Get info about the current download.
-  const std::string url() const;
-  int32_t GetHttpStatus() const;
-  pp::URLResponseInfo GetResponseInfo() const;
-
-  // Close the current connection. It is ok to use the same loader to download
-  // from several URLs. However, the current connection must be closed before
-  // starting a new one.
-  void Close();
-
- private:
-  // We use a single completion callback with a dispatch op-code to distinguish
-  // between the various operations.
-  void CompletionCallbackFunc(int32_t result, DispatchOpCode op_code);
-  // Create a completion callback taking the given op-code.
-  pp::CompletionCallback MakeCallback(DispatchOpCode op_code);
-
-  // Helpers.
-  void InitializeRequest(const std::string& url, pp::URLRequestInfo* request);
-  void ReadNextDataBlock();
-  void StartDownload(int32_t result, const std::string& url);
-
-  // Main-thread callback for CloseAndDeleteSelf.
-  static void DeleteOnMainThread(void* user_data, int32_t err);
-
-  pp::CompletionCallbackFactory<WebResourceLoader,
-                                threading::RefCount> factory_;
-  pp::Instance* instance_;
-  pp::URLLoader url_loader_;
-  bool connected_;
-
-  char* buffer_;
-  size_t buffer_size_;
-  int32_t data_size_;
-
-  static const int32_t kInternalBufferSize = 4096;
-  char internal_buffer_[kInternalBufferSize];
-
-  Delegate* delegate_;
-};
-
-
-}  // namespace life
-
-#endif  // WEB_RESOURCE_LOADER_H_