* `IncomingMessage` {http.IncomingMessage} Specifies the `IncomingMessage`

class to be used. Useful for extending the original `IncomingMessage`.

**Default:** `IncomingMessage`.

* `keepAlive` {boolean} If set to `true`, it enables keep-alive functionality

on the socket immediately after a new incoming connection is received,

similarly on what is done in \[`socket.setKeepAlive([enable][, initialDelay])`]\[`socket.setKeepAlive(enable, initialDelay)`].

a 400 (Bad Request) status code to any HTTP/1.1 request message

that lacks a Host header (as mandated by the specification).

**Default:** `true`.

* `ServerResponse` {http.ServerResponse} Specifies the `ServerResponse` class

to be used. Useful for extending the original `ServerResponse`. **Default:**

`ServerResponse`.

invalid HTTP headers when `true`. Using the insecure parser should be

avoided. See [`--insecure-http-parser`][] for more information.

**Default:** `false`

* `localAddress` {string} Local interface to bind for network connections.

* `localPort` {number} Local port to connect from.

* `lookup` {Function} Custom lookup function. **Default:** [`dns.lookup()`][].

* `uniqueHeaders` {Array} A list of request headers that should be sent

only once. If the header's value is an array, the items will be joined

using `; `.

* `callback` {Function}

* Returns: {http.ClientRequest}