resourceresponse.h

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2006 Apple Computer, 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. 
 */

#ifndef ResourceResponse_h
#define ResourceResponse_h

#include "ResourceResponseBase.h"
#include <wtf/RetainPtr.h>

#ifdef __OBJC__
@class NSURLResponse;
#else
class NSURLResponse;
#endif

namespace WebCore {

class ResourceResponse : public ResourceResponseBase {
public:
    ResourceResponse()
        : m_isUpToDate(true)
    {
    }

    ResourceResponse(NSURLResponse* nsResponse)
        : m_nsResponse(nsResponse)
        , m_isUpToDate(false)
    {
        m_isNull = !nsResponse;
    }
    
    ResourceResponse(const KURL& url, const String& mimeType, long long expectedLength, const String& textEncodingName, const String& filename)
        : ResourceResponseBase(url, mimeType, expectedLength, textEncodingName, filename)
        , m_isUpToDate(true)
    {
    }

    unsigned memoryUsage() const
    {
        // FIXME: Find some programmatic lighweight way to calculate ResourceResponse and associated classes.
        // This is a rough estimate of resource overhead based on stats collected from the stress test.
        return 3072;
        /*  1280 * 2 +                // average size of ResourceResponse. Doubled to account for the WebCore copy and the CF copy.
                                      // Mostly due to the size of the hash maps, the Header Map strings and the URL.
            256 * 2                   // Overhead from ResourceRequest, doubled to account for WebCore copy and CF copy.
                                      // Mostly due to the URL and Header Map.
         */
    }

    NSURLResponse *nsURLResponse() const;

private:
    friend class ResourceResponseBase;

    void platformLazyInit();
    static bool platformCompare(const ResourceResponse& a, const ResourceResponse& b);

    RetainPtr<NSURLResponse> m_nsResponse;
    bool m_isUpToDate;
};

} // namespace WebCore

#endif // ResourceResponse_h