C++ HttpHeader::authorizationTarget方法代码示例

KLUPD::CoreError KLUPD::HttpProtocol::httpRequestAttempt(
    const Path &fileNameIn,
    const Path &relativeUrlPathIn,
    const Address &serverAddressIn, const std::string &userAgent,
    const bool useProxy, const Address &proxyAddressIn,
    const AuthorizationTypeList &proxyAuthorizationMethods,
    const size_t regettingPosition)
{
    size_t infiniteRedirectLoop = 0;

    Path fileName = fileNameIn;
    Path relativeUrlPath = relativeUrlPathIn;
    Address serverAddress = serverAddressIn;
    Address proxyAddress = proxyAddressIn;

    m_regettingPosition = regettingPosition;

    // cache for next iteration generate request
     // at first attempt the target is not known, but proxy server target is used,
     //  because of possible protection from client for authorization on server
    DownloadProgress::AuthorizationTarget authorizationTarget = DownloadProgress::proxyServer;


    ////////////////////
    // the State flags agains proxies that close connection after authorization switch.
    //  There are proxies (e.g. Squid/2.4.STABLE7) which deals in next way:
    // *** Client -> Server:  GET file
    // *** Server -> Client: HTTP 407 / Proxy-Connection: keep-alive
    // *** Server closes connection
    // *** Client -> Server GET 407
    //
    // Here are 3 flags to track such situations, that previous response is received,
    //  BUT then server closes connection
    bool previousResponseReceived = false;
    bool authorizationTypeSwitched = false;
    bool requestHasAlreadyBeenRepeated = false;
    ////////////////////


    ////////////////////
    // in case proxy server requires authorization, but sends incorrect (from HTTP)
    //   code for authorization failure in next way
    // *** Client -> Server:  GET file
    // *** Server -> Client: HTTP 407 / Proxy-Authorization: NTLM
    // *** Client -> Server GET  / Proxy-Authorization: NTLM
    // *** Server -> Client: HTTP 502 (or 403 or other code)
    // *** here is authorization state is forgotten, because 502 request does NOT contain "Proxy-Authorization: NTLM"
    // *** Client ask from product new credentials
    // *** Client -> Server GET  / Proxy-Authorization: NTLM (with new credentials)
    bool authorizationWasNeededOnProxy = false;

    // it makes no sence to try Ntlm without credentials authorization type,
     // because this authorization type does not depend on provided credentials
    bool ntlmAuthorizationTriedAlready = false;

    int lastHttpCode = 0;

    for(size_t protectionAgainstCyclingCounter = 100; protectionAgainstCyclingCounter; --protectionAgainstCyclingCounter)
    {
        const CoreError connectionResult = setupLowLevelConnectionIfNeed(useProxy, useProxy ? proxyAddress : serverAddress, proxyAuthorizationMethods);
        if(connectionResult != CORE_NO_ERROR)
        {
            TRACE_MESSAGE2("Failed to setup connection to HTTP Server, result '%S'",
                toString(connectionResult).toWideChar());
            return connectionResult;
        }

        // make proxy authorization header
        std::string proxyAuthorizationHeader;
        if(!m_authorizationDriver.makeProxyAuthorizationHeader(proxyAuthorizationHeader)
            // we know authorization methods supported by proxy server
            || ((m_authorizationDriver.currentAuthorizationType() == noAuthorization) && !m_authorizationDriver.supportedAuthorizationTypesByServer().empty()))
        {
            if(!switchAuthorization(fileName, relativeUrlPath, authorizationTarget, proxyAddress,
                authorizationTypeSwitched, ntlmAuthorizationTriedAlready))
            {
                if(lastHttpCode)
                    return HttpHeader::convertHttpCodeToUpdaterCode(lastHttpCode);

                return useProxy ? CORE_PROXY_AUTH_ERROR : CORE_SERVER_AUTH_ERROR;
            }

            // try other authorization type
            continue;
        }

        HTTPRequestBuilder requestBuilder(m_method);
        const std::vector<unsigned char> requestBuffer = requestBuilder.generateRequest(
            fileName,
            relativeUrlPath,
            useProxy,
            serverAddress,
            userAgent,
            proxyAuthorizationHeader,
            m_regettingPosition,
            m_postData);

        TRACE_MESSAGE2("Sending HTTP request\n%s", requestBuilder.toString().c_str());

        if(requestBuffer.empty())
//.........这里部分代码省略.........