http.py 文件源码

def checkPersistence(self, request, version):
        """Check if the channel should close or not."""
        connection = request.getHeader('connection')
        if connection:
            tokens = map(str.lower, connection.split(' '))
        else:
            tokens = []

        # HTTP 1.0 persistent connection support is currently disabled,
        # since we need a way to disable pipelining. HTTP 1.0 can't do
        # pipelining since we can't know in advance if we'll have a
        # content-length header, if we don't have the header we need to close the
        # connection. In HTTP 1.1 this is not an issue since we use chunked
        # encoding if content-length is not available.

        #if version == "HTTP/1.0":
        #    if 'keep-alive' in tokens:
        #        request.setHeader('connection', 'Keep-Alive')
        #        return 1
        #    else:
        #        return 0
        if version == "HTTP/1.1":
            if 'close' in tokens:
                request.setHeader('connection', 'close')
                return 0
            else:
                return 1
        else:
            return 0