1 // Copyright 2013 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 #ifndef CONTENT_PUBLIC_RENDERER_RESOURCE_FETCHER_H_ 6 #define CONTENT_PUBLIC_RENDERER_RESOURCE_FETCHER_H_ 7 8 #include <string> 9 10 #include "base/callback.h" 11 #include "content/common/content_export.h" 12 #include "third_party/WebKit/public/platform/WebURLRequest.h" 13 14 class GURL; 15 16 namespace base { 17 class TimeDelta; 18 } 19 20 namespace blink { 21 class WebFrame; 22 class WebURLResponse; 23 } 24 25 namespace content { 26 27 // Interface to download resources asynchronously. 28 class CONTENT_EXPORT ResourceFetcher { 29 public: ~ResourceFetcher()30 virtual ~ResourceFetcher() {} 31 32 // This will be called asynchronously after the URL has been fetched, 33 // successfully or not. If there is a failure, response and data will both be 34 // empty. |response| and |data| are both valid until the URLFetcher instance 35 // is destroyed. 36 typedef base::Callback<void(const blink::WebURLResponse& response, 37 const std::string& data)> Callback; 38 39 // Creates a ResourceFetcher for the specified resource. Caller takes 40 // ownership of the returned object. Deleting the ResourceFetcher will cancel 41 // the request, and the callback will never be run. 42 static ResourceFetcher* Create(const GURL& url); 43 44 // Set the corresponding parameters of the request. Must be called before 45 // Start. By default, requests are GETs with no body. 46 virtual void SetMethod(const std::string& method) = 0; 47 virtual void SetBody(const std::string& body) = 0; 48 virtual void SetHeader(const std::string& header, 49 const std::string& value) = 0; 50 51 // Starts the request using the specified frame. Calls |callback| when 52 // done. 53 virtual void Start(blink::WebFrame* frame, 54 blink::WebURLRequest::TargetType target_type, 55 const Callback& callback) = 0; 56 57 // Sets how long to wait for the server to reply. By default, there is no 58 // timeout. Must be called after a request is started. 59 virtual void SetTimeout(const base::TimeDelta& timeout) = 0; 60 }; 61 62 } // namespace content 63 64 #endif // CONTENT_PUBLIC_RENDERER_RESOURCE_FETCHER_H_ 65