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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ThreadableLoader_h
#define ThreadableLoader_h
#include "core/fetch/ResourceLoaderOptions.h"
#include "platform/CrossThreadCopier.h"
#include "wtf/Noncopyable.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
namespace blink {
class ResourceRequest;
class ExecutionContext;
class ThreadableLoaderClient;
enum CrossOriginRequestPolicy {
DenyCrossOriginRequests,
UseAccessControl,
AllowCrossOriginRequests
};
enum PreflightPolicy {
ConsiderPreflight,
ForcePreflight,
PreventPreflight
};
enum ContentSecurityPolicyEnforcement {
EnforceConnectSrcDirective,
DoNotEnforceContentSecurityPolicy,
};
struct ThreadableLoaderOptions {
ThreadableLoaderOptions()
: preflightPolicy(ConsiderPreflight)
, crossOriginRequestPolicy(DenyCrossOriginRequests)
, contentSecurityPolicyEnforcement(EnforceConnectSrcDirective)
, timeoutMilliseconds(0) { }
// When adding members, CrossThreadThreadableLoaderOptionsData should
// be updated.
PreflightPolicy preflightPolicy; // If AccessControl is used, how to determine if a preflight is needed.
CrossOriginRequestPolicy crossOriginRequestPolicy;
AtomicString initiator;
ContentSecurityPolicyEnforcement contentSecurityPolicyEnforcement;
unsigned long timeoutMilliseconds;
};
// Encode AtomicString as String to cross threads.
struct CrossThreadThreadableLoaderOptionsData {
explicit CrossThreadThreadableLoaderOptionsData(const ThreadableLoaderOptions& options)
: preflightPolicy(options.preflightPolicy)
, crossOriginRequestPolicy(options.crossOriginRequestPolicy)
, initiator(options.initiator.string().isolatedCopy())
, contentSecurityPolicyEnforcement(options.contentSecurityPolicyEnforcement)
, timeoutMilliseconds(options.timeoutMilliseconds) { }
operator ThreadableLoaderOptions() const
{
ThreadableLoaderOptions options;
options.preflightPolicy = preflightPolicy;
options.crossOriginRequestPolicy = crossOriginRequestPolicy;
options.initiator = AtomicString(initiator);
options.contentSecurityPolicyEnforcement = contentSecurityPolicyEnforcement;
options.timeoutMilliseconds = timeoutMilliseconds;
return options;
}
PreflightPolicy preflightPolicy;
CrossOriginRequestPolicy crossOriginRequestPolicy;
String initiator;
ContentSecurityPolicyEnforcement contentSecurityPolicyEnforcement;
unsigned long timeoutMilliseconds;
};
template<> struct CrossThreadCopierBase<false, false, false, ThreadableLoaderOptions> {
typedef CrossThreadThreadableLoaderOptionsData Type;
static Type copy(const ThreadableLoaderOptions& options)
{
return CrossThreadThreadableLoaderOptionsData(options);
}
};
// Useful for doing loader operations from any thread (not threadsafe,
// just able to run on threads other than the main thread).
class ThreadableLoader : public RefCounted<ThreadableLoader> {
WTF_MAKE_NONCOPYABLE(ThreadableLoader);
public:
// ThreadableLoaderOptions argument configures this ThreadableLoader's
// behavior.
//
// ResourceLoaderOptions argument will be passed to the FetchRequest
// that this ThreadableLoader creates. It can be altered e.g. when
// redirect happens.
static void loadResourceSynchronously(ExecutionContext&, const ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
static PassRefPtr<ThreadableLoader> create(ExecutionContext&, ThreadableLoaderClient*, const ResourceRequest&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
// A ThreadableLoader may have a timeout specified. It is possible, in some cases, for
// the timeout to be overridden after the request is sent (for example, XMLHttpRequests
// may override their timeout setting after sending).
//
// Set a new timeout relative to the time the request started, in milliseconds.
virtual void overrideTimeout(unsigned long timeoutMilliseconds) = 0;
virtual void cancel() = 0;
virtual ~ThreadableLoader() { }
protected:
ThreadableLoader() { }
};
} // namespace blink
#endif // ThreadableLoader_h
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