//------------------------------------------------------------------------------
/*
    Copyright (c) 2011-2013, OpenCoin, Inc.
*/
//==============================================================================

SETUP_LOG (HTTPRequest)

// Logic to handle incoming HTTP reqests

void HTTPRequest::reset ()
{
    mHeaders.clear ();
    sRequestBody.clear ();
    sAuthorization.clear ();
    iDataSize = 0;
    bShouldClose = true;
    eState = await_request;
}

HTTPRequest::Action HTTPRequest::requestDone (bool forceClose)
{
    if (forceClose || bShouldClose)
        return haCLOSE_CONN;

    reset ();
    return haREAD_LINE;
}

std::string HTTPRequest::getReplyHeaders (bool forceClose)
{
    if (forceClose || bShouldClose)
        return "Connection: close\r\n";
    else
        return "Connection: Keep-Alive\r\n";
}

HTTPRequest::Action HTTPRequest::consume (boost::asio::streambuf& buf)
{
    std::string line;
    std::istream is (&buf);
    std::getline (is, line);
    boost::trim (line);

    //  WriteLog (lsTRACE, HTTPRequest) << "HTTPRequest line: " << line;

    if (eState == await_request)
    {
        // VERB URL PROTO
        if (line.empty ())
            return haREAD_LINE;

        sRequest = line;
        bShouldClose = sRequest.find ("HTTP/1.1") == std::string::npos;

        eState = await_header;
        return haREAD_LINE;
    }

    if (eState == await_header)
    {
        // HEADER_NAME: HEADER_BODY
        if (line.empty ()) // empty line or bare \r
        {
            if (iDataSize == 0)
            {
                // no body
                eState = do_request;
                return haDO_REQUEST;
            }

            eState = getting_body;
            return haREAD_RAW;
        }

        size_t colon = line.find (':');

        if (colon != std::string::npos)
        {
            std::string headerName = line.substr (0, colon);
            boost::trim (headerName);
            boost::to_lower (headerName);

            std::string headerValue = line.substr (colon + 1);
            boost::trim (headerValue);

            mHeaders[headerName] += headerValue;

            if (headerName == "connection")
            {
                boost::to_lower (headerValue);

                if ((headerValue == "keep-alive") || (headerValue == "keepalive"))
                    bShouldClose = false;

                if (headerValue == "close")
                    bShouldClose = true;
            }

            if (headerName == "content-length")
                iDataSize = lexicalCastThrow <int> (headerValue);

            if (headerName == "authorization")
                sAuthorization = headerValue;
        }

        return haREAD_LINE;
    }

    assert (false);
    return haERROR;
}

// vim:ts=4