spoof 2.0.5

HTTP server for testing environments

Spoof is a simple HTTP server for test environments.

>>> import requests
... import spoof
...
... with spoof.HTTPServer() as httpd:
...     httpd.queueResponse([200, [], "This is Spoof 👻👋"])
...     requests.get(httpd.url).text
...     httpd.requests
...
'This is Spoof 👻👋'
[SpoofRequestEnv(method='GET', uri='/', protocol='HTTP/1.1', serverName='localhost', serverPort=62775, headers=<http.client.HTTPMessage object at 0x10d8a8f50>, path='/', queryString=None, content=None, contentType=None, contentEncoding=None, contentLength=0)]

Test interface for HTTP

Spoof lets you easily create HTTP servers listening on real network sockets. Designed for test environments, what responses to return can be configured while an HTTP server is running, and requests can be inspected live or after a response is sent.

Unlike a traditional HTTP server, where specific methods and paths are configured in advance, Spoof accepts and captures all requests, sending whatever responses are queued, or a default response if the queue is empty.

Why would I want this?

Spoof is all about enabling test-driven development (and refactoring) of HTTP client code. Have you ever felt icky patching a client library to write tests? Ever been burned by this? Ever wanted to refactor a client library, but had no way to prove functionality apart from doing live integration testing? If you answered yes to any of the above, Spoof is for you.

Compatibility

Spoof is tested on Python 3.10 to 3.14, leverages the http.server module included in the standard library, and has no external dependencies. It may work on older versions of Python, but this is not supported.

Multiple Spoof HTTP servers can be run concurrently, and by default, the port number is the next available unused port. With OpenSSL installed, Spoof can also provide an SSL/TLS HTTP server. IPv6 is fully supported.

Spoof HTTP servers run in a single background thread, so request and response order should be predictable. Tests should be able to use the same fixtures, in the same order, and get the same results.

SpoofRequestEnv instances

Spoof captures each request as a namedtuple with the following properties:

Property	Description
content	bytes object of request content
contentEncoding	Value of Content-Encoding header, if present
contentLength	Value of Content-Length header, if present
contentType	Value of Content-Type header, if present
headers	http.client.HTTPMessage object of headers
method	Request method (e.g. GET, POST, HEAD)
path	Decoded URI path, without query string
protocol	Protocol version (e.g. HTTP/1.0)
queryString	Anything in URI after ?
serverName	Host name of HTTP server
serverPort	Port number of HTTP server
uri	Raw URI path and query string, if present

Queued responses

Queue multiple responses, verify content, and request paths:

import requests
import spoof

with spoof.HTTPServer() as httpd:
    responses = [
        [200, [("Content-Type", "application/json")], '{"id": 1111}'],
        [200, [("Content-Type", "application/json")], '{"id": 2222}'],
    ]
    httpd.queueResponse(*responses)
    httpd.defaultResponse = [404, [], "Not found"]

    assert requests.get(httpd.url + "/path").json() == {"id": 1111}
    assert requests.get(httpd.url + "/alt/path").json() == {"id": 2222}
    assert requests.get(httpd.url + "/oops").status_code == 404
    assert [r.path for r in httpd.requests] == ["/path", "/alt/path", "/oops"]

Callback response

Set a callback as the default response (callbacks can also be queued):

import requests
import spoof

with spoof.HTTPServer() as httpd:
    httpd.defaultResponse = lambda request: [200, [], request.path]

    assert requests.get(httpd.url + "/alt").content == b"/alt"

SSL/TLS Mode

Test queued response with a self-signed SSL/TLS certificate:

import requests
import spoof

with spoof.SelfSignedSSLContext() as selfSigned:
    with spoof.HTTPServer(sslContext=selfSigned.sslContext) as httpd:
        httpd.queueResponse([200, [], "No self-signed cert warning!"])
        response = requests.get(httpd.url + "/path",
                                verify=selfSigned.certFile)

        assert httpd.requests[-1].method == "GET"
        assert httpd.requests[-1].path == "/path"
        assert response.content == b"No self-signed cert warning!"

Proxy Mode

Spoof also supports proxying HTTP requests by setting the upstream attribute to another Spoof instance:

import requests
import spoof

with spoof.SelfSignedSSLContext(commonName="example.spoof") as ssl:
    with spoof.HTTPServer(sslContext=ssl.sslContext) as proxy:
        with spoof.HTTPServer(sslContext=ssl.sslContext) as upstream:
            proxy.upstream = upstream
            proxy.defaultResponse = [200, [("X-Spoof-Proxy", "True")], ""]
            upstream.defaultResponse = [200, [], "I'm here!"]
            response = requests.get(
                "https://example.spoof/ayt",
                proxies={"https": proxy.url},
                verify=ssl.certFile
            )
            assert proxy.requests[0].method == "CONNECT"
            assert proxy.requests[0].path == "example.spoof:443"
            assert upstream.requests[0].method == "GET"
            assert upstream.requests[0].path == "/ayt"
            assert response.content == b"I'm here!"

Using IPv6

Setting the host attribute to an IPv6 address will work as expected. There is also an IPv6-only spoof.HTTPServer6 class that can be used if needed.

>>> import requests
... import spoof
...
... with spoof.HTTPServer(host="::1") as httpd:
...     httpd.queueResponse([200, [], "This is Spoof on IPv6 👀"])
...     requests.get(httpd.url).text
...     httpd.url
...
'This is Spoof on IPv6 👀'
'http://[::1]:51324'