Home | History | Annotate | Download | only in loader 
      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 "core/loader/ResourceLoaderOptions.h"
     35 #include "weborigin/SecurityOrigin.h"
     36 #include "wtf/Noncopyable.h"
     37 #include "wtf/PassRefPtr.h"
     38 #include "wtf/RefPtr.h"
     39 
     40 namespace WebCore {
     41 
     42     class ResourceError;
     43     class ResourceRequest;
     44     class ResourceResponse;
     45     class ScriptExecutionContext;
     46     class ThreadableLoaderClient;
     47 
     48     enum CrossOriginRequestPolicy {
     49         DenyCrossOriginRequests,
     50         UseAccessControl,
     51         AllowCrossOriginRequests
     52     };
     53 
     54     enum PreflightPolicy {
     55         ConsiderPreflight,
     56         ForcePreflight,
     57         PreventPreflight
     58     };
     59 
     60     enum ContentSecurityPolicyEnforcement {
     61         EnforceConnectSrcDirective,
     62         DoNotEnforceContentSecurityPolicy,
     63     };
     64 
     65     struct ThreadableLoaderOptions : public ResourceLoaderOptions {
     66         ThreadableLoaderOptions()
     67             : preflightPolicy(ConsiderPreflight)
     68             , crossOriginRequestPolicy(DenyCrossOriginRequests)
     69             , contentSecurityPolicyEnforcement(EnforceConnectSrcDirective)
     70             , timeoutMilliseconds(0) { }
     71 
     72         PreflightPolicy preflightPolicy; // If AccessControl is used, how to determine if a preflight is needed.
     73         CrossOriginRequestPolicy crossOriginRequestPolicy;
     74         RefPtr<SecurityOrigin> securityOrigin;
     75         AtomicString initiator;
     76         ContentSecurityPolicyEnforcement contentSecurityPolicyEnforcement;
     77         unsigned long timeoutMilliseconds;
     78     };
     79 
     80     // Useful for doing loader operations from any thread (not threadsafe,
     81     // just able to run on threads other than the main thread).
     82     class ThreadableLoader {
     83         WTF_MAKE_NONCOPYABLE(ThreadableLoader);
     84     public:
     85         static void loadResourceSynchronously(ScriptExecutionContext*, const ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&);
     86         static PassRefPtr<ThreadableLoader> create(ScriptExecutionContext*, ThreadableLoaderClient*, const ResourceRequest&, const ThreadableLoaderOptions&);
     87 
     88         virtual void cancel() = 0;
     89         void ref() { refThreadableLoader(); }
     90         void deref() { derefThreadableLoader(); }
     91 
     92     protected:
     93         ThreadableLoader() { }
     94         virtual ~ThreadableLoader() { }
     95         virtual void refThreadableLoader() = 0;
     96         virtual void derefThreadableLoader() = 0;
     97     };
     98 
     99 } // namespace WebCore
    100 
    101 #endif // ThreadableLoader_h
    102