6f67699396a9563da91ffc926ad6134ca5dacdf0
[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / core / fetch / ResourceLoader.h
1 /*
2  * Copyright (C) 2005, 2006, 2011 Apple 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
6  * are met:
7  *
8  * 1.  Redistributions of source code must retain the above copyright
9  *     notice, this list of conditions and the following disclaimer.
10  * 2.  Redistributions in binary form must reproduce the above copyright
11  *     notice, this list of conditions and the following disclaimer in the
12  *     documentation and/or other materials provided with the distribution.
13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14  *     its contributors may be used to endorse or promote products derived
15  *     from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28
29 #ifndef ResourceLoader_h
30 #define ResourceLoader_h
31
32 #include "core/fetch/ResourceLoaderOptions.h"
33 #include "platform/network/ResourceRequest.h"
34 #include "public/platform/WebURLLoader.h"
35 #include "public/platform/WebURLLoaderClient.h"
36 #include "wtf/Forward.h"
37 #include "wtf/RefCounted.h"
38
39 namespace blink {
40 class WebThreadedDataReceiver;
41 }
42
43 namespace blink {
44
45 class Resource;
46 class KURL;
47 class ResourceError;
48 class ResourceResponse;
49 class ResourceLoaderHost;
50
51 class ResourceLoader FINAL : public RefCountedWillBeGarbageCollectedFinalized<ResourceLoader>, protected WebURLLoaderClient {
52 public:
53     static PassRefPtrWillBeRawPtr<ResourceLoader> create(ResourceLoaderHost*, Resource*, const ResourceRequest&, const ResourceLoaderOptions&);
54     virtual ~ResourceLoader();
55     void trace(Visitor*);
56
57     void start();
58     void changeToSynchronous();
59
60     void cancel();
61     void cancel(const ResourceError&);
62     void cancelIfNotFinishing();
63
64     Resource* cachedResource() { return m_resource; }
65     const ResourceRequest& originalRequest() const { return m_originalRequest; }
66
67     void setDefersLoading(bool);
68     bool defersLoading() const { return m_defersLoading; }
69
70     void attachThreadedDataReceiver(PassOwnPtr<blink::WebThreadedDataReceiver>);
71
72     void releaseResources();
73
74     void didChangePriority(ResourceLoadPriority, int intraPriorityValue);
75
76     // WebURLLoaderClient
77     virtual void willSendRequest(blink::WebURLLoader*, blink::WebURLRequest&, const blink::WebURLResponse& redirectResponse) OVERRIDE;
78     virtual void didSendData(blink::WebURLLoader*, unsigned long long bytesSent, unsigned long long totalBytesToBeSent) OVERRIDE;
79     virtual void didReceiveResponse(blink::WebURLLoader*, const blink::WebURLResponse&) OVERRIDE;
80     virtual void didReceiveData(blink::WebURLLoader*, const char*, int, int encodedDataLength) OVERRIDE;
81     virtual void didReceiveCachedMetadata(blink::WebURLLoader*, const char* data, int length) OVERRIDE;
82     virtual void didFinishLoading(blink::WebURLLoader*, double finishTime, int64 encodedDataLength) OVERRIDE;
83     virtual void didFail(blink::WebURLLoader*, const blink::WebURLError&) OVERRIDE;
84     virtual void didDownloadData(blink::WebURLLoader*, int, int) OVERRIDE;
85
86     const KURL& url() const { return m_request.url(); }
87     bool shouldSniffContent() const { return m_options.sniffContent == SniffContent; }
88     bool isLoadedBy(ResourceLoaderHost*) const;
89
90     bool reachedTerminalState() const { return m_state == Terminated; }
91     const ResourceRequest& request() const { return m_request; }
92
93     class RequestCountTracker {
94     public:
95         RequestCountTracker(ResourceLoaderHost*, Resource*);
96         RequestCountTracker(const RequestCountTracker&);
97         ~RequestCountTracker();
98     private:
99         ResourceLoaderHost* m_host;
100         Resource* m_resource;
101     };
102
103 private:
104     ResourceLoader(ResourceLoaderHost*, Resource*, const ResourceLoaderOptions&);
105
106     void init(const ResourceRequest&);
107     void requestSynchronously();
108
109     void didFinishLoadingOnePart(double finishTime, int64_t encodedDataLength);
110
111     bool responseNeedsAccessControlCheck() const;
112
113     ResourceRequest& applyOptions(ResourceRequest&) const;
114
115     OwnPtr<blink::WebURLLoader> m_loader;
116     RefPtrWillBeMember<ResourceLoaderHost> m_host;
117
118     ResourceRequest m_request;
119     ResourceRequest m_originalRequest; // Before redirects.
120
121     bool m_notifiedLoadComplete;
122
123     bool m_defersLoading;
124     ResourceRequest m_deferredRequest;
125     ResourceLoaderOptions m_options;
126
127     enum ResourceLoaderState {
128         Initialized,
129         Finishing,
130         Terminated
131     };
132
133     enum ConnectionState {
134         ConnectionStateNew,
135         ConnectionStateStarted,
136         ConnectionStateReceivedResponse,
137         ConnectionStateReceivingData,
138         ConnectionStateFinishedLoading,
139         ConnectionStateCanceled,
140         ConnectionStateFailed,
141     };
142
143     RawPtrWillBeMember<Resource> m_resource;
144     ResourceLoaderState m_state;
145
146     // Used for sanity checking to make sure we don't experience illegal state
147     // transitions.
148     ConnectionState m_connectionState;
149
150     OwnPtr<RequestCountTracker> m_requestCountTracker;
151 };
152
153 }
154
155 #endif