/**
     * HTTP Status-Code 301: Moved Permanently.
     */
    public static final int HTTP_MOVED_PERM = 301; 

    /**
     * HTTP Status-Code 302: Temporary Redirect.
     */
    public static final int HTTP_MOVED_TEMP = 302;
    /**
     * HTTP Status-Code 303: See Other.
     */
    public static final int HTTP_SEE_OTHER = 303; 

    /**
     * HTTP Status-Code 304: Not Modified.
     */
    public static final int HTTP_NOT_MODIFIED = 304; 

    /**
     * HTTP Status-Code 305: Use Proxy.
     */
    public static final int HTTP_USE_PROXY = 305; 

    /* 4XX: client error */ 

    /**
     * HTTP Status-Code 400: Bad Request.
     */
    public static final int HTTP_BAD_REQUEST = 400; 

    /**
     * HTTP Status-Code 401: Unauthorized.
     */
    public static final int HTTP_UNAUTHORIZED = 401; 

    /**
     * HTTP Status-Code 402: Payment Required.
     */
    public static final int HTTP_PAYMENT_REQUIRED = 402; 

    /**
     * HTTP Status-Code 403: Forbidden.
     */
    public static final int HTTP_FORBIDDEN = 403; 

    /**
     * HTTP Status-Code 404: Not Found.
     */
    public static final int HTTP_NOT_FOUND = 404; 

    /**
     * HTTP Status-Code 405: Method Not Allowed.
     */
    public static final int HTTP_BAD_METHOD = 405; 

    /**
     * HTTP Status-Code 406: Not Acceptable.
     */
    public static final int HTTP_NOT_ACCEPTABLE = 406; 

    /**
     * HTTP Status-Code 407: Proxy Authentication Required.
     */
    public static final int HTTP_PROXY_AUTH = 407; 

    /**
     * HTTP Status-Code 408: Request Time-Out.
     */
    public static final int HTTP_CLIENT_TIMEOUT = 408; 

    /**
     * HTTP Status-Code 409: Conflict.
     */
    public static final int HTTP_CONFLICT = 409; 

    /**
     * HTTP Status-Code 410: Gone.
     */
    public static final int HTTP_GONE = 410; 

    /**
     * HTTP Status-Code 411: Length Required.
     */
    public static final int HTTP_LENGTH_REQUIRED = 411; 

    /**
     * HTTP Status-Code 412: Precondition Failed.
     */
    public static final int HTTP_PRECON_FAILED = 412; 

    /**
     * HTTP Status-Code 413: Request Entity Too Large.
     */
    public static final int HTTP_ENTITY_TOO_LARGE = 413; 

    /**
     * HTTP Status-Code 414: Request-URI Too Large.
     */
    public static final int HTTP_REQ_TOO_LONG = 414; 

    /**
     * HTTP Status-Code 415: Unsupported Media Type.
     */
    public static final int HTTP_UNSUPPORTED_TYPE = 415;
    /* 5XX: server error */ 

    /**
     * HTTP Status-Code 500: Internal Server Error. 
     * @deprecated   it is misplaced and shouldn't have existed.
     */
    @Deprecated
    public static final int HTTP_SERVER_ERROR = 500; 

    /** 
     * HTTP Status-Code 500: Internal Server Error. 
     */
    public static final int HTTP_INTERNAL_ERROR = 500; 

    /** 
     * HTTP Status-Code 501: Not Implemented.
     */
    public static final int HTTP_NOT_IMPLEMENTED = 501; 

    /**
     * HTTP Status-Code 502: Bad Gateway.
     */
    public static final int HTTP_BAD_GATEWAY = 502;