1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 */ 31 32 #ifndef PingLoader_h 33 #define PingLoader_h 34 35 #include "ResourceHandleClient.h" 36 #include "Timer.h" 37 #include <wtf/Noncopyable.h> 38 #include <wtf/RefPtr.h> 39 40 namespace WebCore { 41 42 class Frame; 43 class KURL; 44 class ResourceError; 45 class ResourceHandle; 46 class ResourceResponse; 47 48 // This class triggers asynchronous loads independent of Frame staying alive (i.e., auditing pingbacks). 49 // Since nothing depends on resources loaded through this class, we just want 50 // to allow the load to live long enough to ensure the message was actually sent. 51 // Therefore, as soon as a callback is received from the ResourceHandle, this class 52 // will cancel the load and delete itself. 53 class PingLoader : private ResourceHandleClient { 54 WTF_MAKE_NONCOPYABLE(PingLoader); WTF_MAKE_FAST_ALLOCATED; 55 public: 56 static void loadImage(Frame*, const KURL& url); 57 static void sendPing(Frame*, const KURL& pingURL, const KURL& destinationURL); 58 59 ~PingLoader(); 60 61 private: 62 PingLoader(Frame*, const ResourceRequest&); 63 didReceiveResponse(ResourceHandle *,const ResourceResponse &)64 void didReceiveResponse(ResourceHandle*, const ResourceResponse&) { delete this; } didReceiveData(ResourceHandle *,const char *,int,int)65 void didReceiveData(ResourceHandle*, const char*, int, int) { delete this; } didFinishLoading(ResourceHandle *,double)66 void didFinishLoading(ResourceHandle*, double) { delete this; } didFail(ResourceHandle *,const ResourceError &)67 void didFail(ResourceHandle*, const ResourceError&) { delete this; } timeout(Timer<PingLoader> *)68 void timeout(Timer<PingLoader>*) { delete this; } shouldUseCredentialStorage(ResourceHandle *)69 bool shouldUseCredentialStorage(ResourceHandle*) { return m_shouldUseCredentialStorage; } 70 71 RefPtr<ResourceHandle> m_handle; 72 Timer<PingLoader> m_timeout; 73 bool m_shouldUseCredentialStorage; 74 }; 75 76 } 77 78 #endif 79