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
38namespace 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 {
58        ThreadableLoaderOptions() : sendLoadCallbacks(false), sniffContent(false), allowCredentials(false), forcePreflight(false), crossOriginRequestPolicy(DenyCrossOriginRequests), shouldBufferData(true) { }
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        bool shouldBufferData;
65    };
66
67    // Useful for doing loader operations from any thread (not threadsafe,
68    // just able to run on threads other than the main thread).
69    class ThreadableLoader {
70        WTF_MAKE_NONCOPYABLE(ThreadableLoader);
71    public:
72        static void loadResourceSynchronously(ScriptExecutionContext*, const ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&);
73        static PassRefPtr<ThreadableLoader> create(ScriptExecutionContext*, ThreadableLoaderClient*, const ResourceRequest&, const ThreadableLoaderOptions&);
74
75        virtual void cancel() = 0;
76        void ref() { refThreadableLoader(); }
77        void deref() { derefThreadableLoader(); }
78
79    protected:
80        ThreadableLoader() { }
81        virtual ~ThreadableLoader() { }
82        virtual void refThreadableLoader() = 0;
83        virtual void derefThreadableLoader() = 0;
84    };
85
86} // namespace WebCore
87
88#endif // ThreadableLoader_h
89