server.py 文件源码

def getClientIP(request, useForwardedHeader=False):
    """Get the client's IP address from the ``'X-Forwarded-For:'``
    header, or from the :api:`request <twisted.web.server.Request>`.

    :type request: :api:`twisted.web.http.Request`
    :param request: A ``Request`` for a :api:`twisted.web.resource.Resource`.
    :param bool useForwardedHeader: If ``True``, attempt to get the client's
        IP address from the ``'X-Forwarded-For:'`` header.
    :rtype: ``None`` or :any:`str`
    :returns: The client's IP address, if it was obtainable.
    """
    ip = None

    if useForwardedHeader:
        header = request.getHeader("X-Forwarded-For")
        if header:
            ip = header.split(",")[-1].strip()
            if not isIPAddress(ip):
                log.msg("Got weird X-Forwarded-For value %r" % header)
                ip = None
    else:
        ip = request.getClientIP()

    return ip