1 /*
2  * Copyright (C) 2009 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 #ifndef ThreadableLoader_h
32 #define ThreadableLoader_h
33 
34 #include <wtf/Noncopyable.h>
35 #include <wtf/PassRefPtr.h>
36 #include <wtf/Vector.h>
37 
38 namespace WebCore {
39 
40     class ResourceError;
41     class ResourceRequest;
42     class ResourceResponse;
43     class ScriptExecutionContext;
44     class ThreadableLoaderClient;
45 
46     enum StoredCredentials {
47         AllowStoredCredentials,
48         DoNotAllowStoredCredentials
49     };
50 
51     enum CrossOriginRequestPolicy {
52         DenyCrossOriginRequests,
53         UseAccessControl,
54         AllowCrossOriginRequests
55     };
56 
57     struct ThreadableLoaderOptions {
ThreadableLoaderOptionsThreadableLoaderOptions58         ThreadableLoaderOptions() : sendLoadCallbacks(false), sniffContent(false), allowCredentials(false), forcePreflight(false), crossOriginRequestPolicy(DenyCrossOriginRequests) { }
59         bool sendLoadCallbacks;
60         bool sniffContent;
61         bool allowCredentials;  // Whether HTTP credentials and cookies are sent with the request.
62         bool forcePreflight;  // If AccessControl is used, whether to force a preflight.
63         CrossOriginRequestPolicy crossOriginRequestPolicy;
64     };
65 
66     // Useful for doing loader operations from any thread (not threadsafe,
67     // just able to run on threads other than the main thread).
68     class ThreadableLoader {
69         WTF_MAKE_NONCOPYABLE(ThreadableLoader);
70     public:
71         static void loadResourceSynchronously(ScriptExecutionContext*, const ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&);
72         static PassRefPtr<ThreadableLoader> create(ScriptExecutionContext*, ThreadableLoaderClient*, const ResourceRequest&, const ThreadableLoaderOptions&);
73 
74         virtual void cancel() = 0;
ref()75         void ref() { refThreadableLoader(); }
deref()76         void deref() { derefThreadableLoader(); }
77 
78     protected:
ThreadableLoader()79         ThreadableLoader() { }
~ThreadableLoader()80         virtual ~ThreadableLoader() { }
81         virtual void refThreadableLoader() = 0;
82         virtual void derefThreadableLoader() = 0;
83     };
84 
85 } // namespace WebCore
86 
87 #endif // ThreadableLoader_h
88