    def __init__(self, method, uri, headers, bodyProducer, persistent=False):
        """
        @param method: The HTTP method for this request, ex: b'GET', b'HEAD',
            b'POST', etc.
        @type method: L{bytes}

        @param uri: The relative URI of the resource to request.  For example,
            C{b'/foo/bar?baz=quux'}.
        @type uri: L{bytes}

        @param headers: Headers to be sent to the server.  It is important to
            note that this object does not create any implicit headers.  So it
            is up to the HTTP Client to add required headers such as 'Host'.
        @type headers: L{twisted.web.http_headers.Headers}

        @param bodyProducer: L{None} or an L{IBodyProducer} provider which
            produces the content body to send to the remote HTTP server.

        @param persistent: Set to C{True} when you use HTTP persistent
            connection, defaults to C{False}.
        @type persistent: L{bool}
        """
        self.method = _ensureValidMethod(method)
        self.uri = _ensureValidURI(uri)
        self.headers = headers
        self.bodyProducer = bodyProducer
        self.persistent = persistent
        self._parsedURI = None
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.