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/*
* Copyright 2010, The Android Open Source Project
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 WebUrlLoaderClient_h
#define WebUrlLoaderClient_h
#include "RefCounted.h"
#include "WebResponse.h"
#include "WebUrlLoader.h"
#include <base/ref_counted.h>
#include <base/tuple.h>
#include <string>
#include <deque>
class Lock;
class ConditionVariable;
namespace base {
class Thread;
}
namespace net {
class IOBuffer;
}
namespace android {
class WebRequest;
// This class handles communication between the IO thread where loading happens
// and the webkit main thread.
// TODO:
// - Implement didFail
// - Implement sync requests
// - Implement downloadFile
// - Implement pauseLoad
class WebUrlLoaderClient {
public:
WebUrlLoaderClient(WebCore::ResourceHandle*, const WebCore::ResourceRequest&);
~WebUrlLoaderClient();
// Called from WebCore, will be forwarded to the IO thread
bool start(bool sync, bool isPrivateBrowsing);
void cancel();
void downloadFile();
void pauseLoad(bool pause) {} // Android method, does nothing for now
typedef void CallbackFunction(void*);
// This is called from the IO thread, and dispatches the callback to the main thread.
// (For asynchronous calls, we just delegate to WebKit's callOnMainThread.)
void maybeCallOnMainThread(CallbackFunction*, void* context);
// Called by WebRequest (using maybeCallOnMainThread), should be forwarded to WebCore.
static void didReceiveResponse(void*);
static void didReceiveData(void*);
static void didReceiveDataUrl(void*);
static void didFinishLoading(void*);
static void didFail(void*);
static void willSendRequest(void*);
private:
void finish();
RefPtr<WebCore::ResourceHandle> m_resourceHandle;
bool m_cancelling;
bool m_sync;
volatile bool m_finished;
// Not an OwnPtr since it should be deleted on another thread
WebRequest* m_request;
// Handle to the chrome IO thread
static base::Thread* ioThread();
// Check if a request is active
bool isActive() const;
// Mutex and condition variable used for synchronous requests.
// Note that these are static. This works because there's only one main thread.
static Lock* syncLock();
static ConditionVariable* syncCondition();
typedef Tuple2<CallbackFunction*, void*> Callback;
typedef std::deque<Callback> CallbackQueue;
// Queue of callbacks to be executed by the main thread. Must only be accessed inside mutex.
CallbackQueue m_queue;
};
// A struct to send more than one thing in a void*, needed for maybeCallOnMainThread
struct LoaderData {
net::IOBuffer* buffer;
WebUrlLoaderClient* loader;
WebResponse webResponse;
const int size;
OwnPtr<std::string*> string;
LoaderData(WebUrlLoaderClient* l) : buffer(0), loader(l), size(0)
{
}
LoaderData(WebUrlLoaderClient* l, std::string* s) : buffer(0), loader(l), size(0), string(s)
{
}
LoaderData(WebUrlLoaderClient* l, WebResponse r) : buffer(0), loader(l), webResponse(r), size(0)
{
}
LoaderData(WebUrlLoaderClient* l, net::IOBuffer* b, const int s) : buffer(b), loader(l), size(s)
{
}
~LoaderData();
};
} // namespace android
#endif
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