/*
 * Copyright (C) 2009, 2012 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.
 */

#pragma once

#include "CrossOriginPreflightChecker.h"
#include "ResourceResponse.h"
#include "SecurityOrigin.h"
#include "ThreadableLoader.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>

namespace WebCore {
class ContentSecurityPolicy;
class Document;
class ThreadableLoaderClient;

class DocumentThreadableLoader FINAL : public RefCounted<DocumentThreadableLoader>, public ThreadableLoader, private CachedRawResourceClient  {
	WTF_MAKE_FAST_ALLOCATED;
public:
	static void loadResourceSynchronously(Document*, ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&, RefPtr<SecurityOrigin>, PassOwnPtr<ContentSecurityPolicy>);

	enum class ShouldLogError { No, Yes };
	static PassRefPtr<DocumentThreadableLoader> create(Document*, ThreadableLoaderClient*, ResourceRequest&, const ThreadableLoaderOptions&, RefPtr<SecurityOrigin>, PassOwnPtr<ContentSecurityPolicy>, const String& referrer);
	virtual ~DocumentThreadableLoader();

	virtual void cancel() override;
	virtual void setDefersLoading(bool);
    void clearClient() { m_client = nullptr; }

	friend class CrossOriginPreflightChecker;

	using RefCounted<DocumentThreadableLoader>::ref;
	using RefCounted<DocumentThreadableLoader>::deref;

protected:
	virtual void refThreadableLoader() override { ref(); }
	virtual void derefThreadableLoader() override { deref(); }

private:
	enum BlockingBehavior {
		LoadSynchronously,
		LoadAsynchronously
	};

	DocumentThreadableLoader(Document*, ThreadableLoaderClient*, BlockingBehavior, ResourceRequest&, const ThreadableLoaderOptions&, PassRefPtr<SecurityOrigin>, PassOwnPtr<ContentSecurityPolicy>, const String& referrer);

	void clearResource();

	// CachedRawResourceClient
	virtual void dataSent(CachedResource*, unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;
	virtual void responseReceived(CachedResource*, const ResourceResponse&) override;
	virtual void dataReceived(CachedResource*, const char* data, int dataLength) override;
	virtual void redirectReceived(CachedResource*, ResourceRequest&, const ResourceResponse&) override;
	virtual void notifyFinished(CachedResource*) override;
#if PLATFORM(CHROMIUM)
	virtual void dataDownloaded(CachedResource*, int);
#endif

	void didReceiveResponse(unsigned long identifier, const ResourceResponse&);
	void didReceiveData(unsigned long identifier, const char* data, int dataLength);
	void didFinishLoading(unsigned long identifier, double finishTime);
	void didFail(unsigned long identifier, const ResourceError&);
	void makeCrossOriginAccessRequest(const ResourceRequest&);
	void makeSimpleCrossOriginAccessRequest(const ResourceRequest&);
	void makeCrossOriginAccessRequestWithPreflight(PassOwnPtr<ResourceRequest>);
	void preflightSuccess(PassOwnPtr<ResourceRequest>);
	void preflightFailure(unsigned long identifier, const ResourceError&);

	void loadRequest(ResourceRequest&, SecurityCheckPolicy);
	bool isAllowedRedirect(const KURL&);
	bool isAllowedByContentSecurityPolicy(const KURL&, bool didRedirect = false);

    virtual bool isXMLHttpRequest() const final;

	SecurityOrigin* securityOrigin() const;
	const ThreadableLoaderOptions& options() const { return m_options; }
	const String& referrer() const { return m_referrer; }
	const ContentSecurityPolicy& contentSecurityPolicy() const;

	Document& document() { return *m_document; }
	bool isLoading() { return m_resource || m_preflightChecker; }

	void reportRedirectionWithBadScheme(const KURL&);
	void reportContentSecurityPolicyError(const KURL&);
	void reportCrossOriginResourceSharingError(const KURL&);
	void reportIntegrityMetadataError(const KURL&);
	void logErrorAndFail(const ResourceError&);

	CachedResourceHandle<CachedRawResource> m_resource;
	ThreadableLoaderClient* m_client;
	Document* m_document;
	ThreadableLoaderOptions m_options;
	RefPtr<SecurityOrigin> m_origin;
	String m_referrer;
	bool m_sameOriginRequest;
	bool m_simpleRequest;
	bool m_async;
	bool m_delayCallbacksForIntegrityCheck;
	OwnPtr<CrossOriginPreflightChecker> m_preflightChecker;
	OwnPtr<ContentSecurityPolicy> m_contentSecurityPolicy;
	OwnPtr<HTTPHeaderMap> m_originalHeaders;

	ShouldLogError m_shouldLogError;
};

} // namespace WebCore
