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      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 {
     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