/*

 * Copyright (C) 2009 Apple Inc. All Rights Reserved.

 * 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:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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. 

 *

 */

#include "config.h"

#if ENABLE(WORKERS)

#include "WorkerScriptLoader.h"

#include "GenericWorkerTask.h"

#include "ResourceRequest.h"

#include "ScriptExecutionContext.h"

#include "SecurityOrigin.h"

#include "WorkerContext.h"

#include "WorkerScriptLoaderClient.h"

#include "WorkerThreadableLoader.h"

#include <wtf/OwnPtr.h>

#include <wtf/UnusedParam.h>

namespace WebCore {

WorkerScriptLoader::WorkerScriptLoader()

    : m_client(0)

    , m_failed(false)

    , m_identifier(0)

{

}

void WorkerScriptLoader::loadSynchronously(ScriptExecutionContext* scriptExecutionContext, const KURL& url, CrossOriginRequestPolicy crossOriginRequestPolicy)

{

    m_url = url;

    OwnPtr<ResourceRequest> request(createResourceRequest());

    if (!request)

        return;

    ASSERT(scriptExecutionContext->isWorkerContext());

    ThreadableLoaderOptions options;

    options.allowCredentials = true;

    options.crossOriginRequestPolicy = crossOriginRequestPolicy;

    WorkerThreadableLoader::loadResourceSynchronously(static_cast<WorkerContext*>(scriptExecutionContext), *request, *this, options);

}

void WorkerScriptLoader::loadAsynchronously(ScriptExecutionContext* scriptExecutionContext, const KURL& url, CrossOriginRequestPolicy crossOriginRequestPolicy, WorkerScriptLoaderClient* client)

{

    ASSERT(client);

    m_client = client;

    m_url = url;

    OwnPtr<ResourceRequest> request(createResourceRequest());

    if (!request)

        return;

    ThreadableLoaderOptions options;

    options.allowCredentials = true;

    options.crossOriginRequestPolicy = crossOriginRequestPolicy;

    m_threadableLoader = ThreadableLoader::create(scriptExecutionContext, this, *request, options);

}

PassOwnPtr<ResourceRequest> WorkerScriptLoader::createResourceRequest()

{

    OwnPtr<ResourceRequest> request(new ResourceRequest(m_url));

    request->setHTTPMethod("GET");

    return request.release();

}

void WorkerScriptLoader::didReceiveResponse(const ResourceResponse& response)

{

    if (response.httpStatusCode() / 100 != 2 && response.httpStatusCode()) {

        m_failed = true;

        return;

    }

    m_responseEncoding = response.textEncodingName();

}

void WorkerScriptLoader::didReceiveData(const char* data, int len)

{

    if (m_failed)

        return;

    if (!m_decoder) {

        if (!m_responseEncoding.isEmpty())

            m_decoder = TextResourceDecoder::create("text/javascript", m_responseEncoding);

        else

            m_decoder = TextResourceDecoder::create("text/javascript", "UTF-8");

    }

    if (!len)

        return;

    if (len == -1)

        len = strlen(data);

    m_script += m_decoder->decode(data, len);

}

void WorkerScriptLoader::didFinishLoading(unsigned long identifier)

{

    if (m_failed)

        return;

    if (m_decoder)

        m_script += m_decoder->flush();

    m_identifier = identifier;

    notifyFinished();

}

void WorkerScriptLoader::didFail(const ResourceError&)

{

    notifyError();

}

void WorkerScriptLoader::didFailRedirectCheck()

{

    notifyError();

}

void WorkerScriptLoader::didReceiveAuthenticationCancellation(const ResourceResponse&)

{

    notifyError();

}

void WorkerScriptLoader::notifyError()

{

    m_failed = true;

    notifyFinished();

}

void WorkerScriptLoader::notifyFinished()

{

    if (m_client)

        m_client->notifyFinished();

}

} // namespace WebCore

#endif // ENABLE(WORKERS)