void ResourceRequest::doUpdatePlatformRequest()
{
    CFMutableURLRequestRef cfRequest;

    RetainPtr<CFURLRef> url(AdoptCF, ResourceRequest::url().createCFURL());
    RetainPtr<CFURLRef> firstPartyForCookies(AdoptCF, ResourceRequest::firstPartyForCookies().createCFURL());
    if (m_cfRequest) {
        cfRequest = CFURLRequestCreateMutableCopy(0, m_cfRequest.get());
        CFURLRequestSetURL(cfRequest, url.get());
        CFURLRequestSetMainDocumentURL(cfRequest, firstPartyForCookies.get());
        CFURLRequestSetCachePolicy(cfRequest, (CFURLRequestCachePolicy)cachePolicy());
        CFURLRequestSetTimeoutInterval(cfRequest, timeoutInterval());
    } else {
        cfRequest = CFURLRequestCreateMutable(0, url.get(), (CFURLRequestCachePolicy)cachePolicy(), timeoutInterval(), firstPartyForCookies.get());
    }

    RetainPtr<CFStringRef> requestMethod(AdoptCF, httpMethod().createCFString());
    CFURLRequestSetHTTPRequestMethod(cfRequest, requestMethod.get());

    addHeadersFromHashMap(cfRequest, httpHeaderFields());
    WebCore::setHTTPBody(cfRequest, httpBody());
    CFURLRequestSetShouldHandleHTTPCookies(cfRequest, allowHTTPCookies());

    unsigned fallbackCount = m_responseContentDispositionEncodingFallbackArray.size();
    RetainPtr<CFMutableArrayRef> encodingFallbacks(AdoptCF, CFArrayCreateMutable(kCFAllocatorDefault, fallbackCount, 0));
    for (unsigned i = 0; i != fallbackCount; ++i) {
        RetainPtr<CFStringRef> encodingName(AdoptCF, m_responseContentDispositionEncodingFallbackArray[i].createCFString());
        CFStringEncoding encoding = CFStringConvertIANACharSetNameToEncoding(encodingName.get());
        if (encoding != kCFStringEncodingInvalidId)
            CFArrayAppendValue(encodingFallbacks.get(), reinterpret_cast<const void*>(encoding));
    }
    setContentDispositionEncodingFallbackArray(cfRequest, encodingFallbacks.get());

    if (m_cfRequest) {
        RetainPtr<CFHTTPCookieStorageRef> cookieStorage(AdoptCF, CFURLRequestCopyHTTPCookieStorage(m_cfRequest.get()));
        if (cookieStorage)
            CFURLRequestSetHTTPCookieStorage(cfRequest, cookieStorage.get());
        CFURLRequestSetHTTPCookieStorageAcceptPolicy(cfRequest, CFURLRequestGetHTTPCookieStorageAcceptPolicy(m_cfRequest.get()));
        CFURLRequestSetSSLProperties(cfRequest, CFURLRequestGetSSLProperties(m_cfRequest.get()));
    }

    m_cfRequest.adoptCF(cfRequest);
}
CFURLRequestRef cfURLRequest(const ResourceRequest& request)
{
    CFURLRef url = request.url().createCFURL();
    CFURLRef mainDocumentURL = request.mainDocumentURL().createCFURL();

    CFMutableURLRequestRef cfRequest = CFURLRequestCreateMutable(0, url, (CFURLRequestCachePolicy)request.cachePolicy(), request.timeoutInterval(), mainDocumentURL);

    CFRelease(url);
    CFRelease(mainDocumentURL);

    CFStringRef requestMethod = request.httpMethod().createCFString();
    CFURLRequestSetHTTPRequestMethod(cfRequest, requestMethod);
    CFRelease(requestMethod);

    addHeadersFromHashMap(cfRequest, request.httpHeaderFields());
    setHTTPBody(cfRequest, request.httpBody());
    CFURLRequestSetShouldHandleHTTPCookies(cfRequest, request.allowHTTPCookies());

    return cfRequest;
}