Webhook Listener

Very basic webserver module to listen for webhooks and forward requests to predefined functions.

Author: Todd Roberts

https://pypi.org/project/webhook_listener/

https://github.com/toddrob99/Webhooks

Install

Install from PyPI using pip

pip install webhook_listener

Use

• Define a function to process requests
  • request parameter will be a cherrypy request object
  • *args parameter will be a tuple of URL path components
  • **kwargs parameter will be a dictionary of URL parameters
  • Get the body of a POST request from request.body.read passing the length of request.headers['Content-Length']: request.body.read(int(request.headers['Content-Length'])) if int(request.headers.get('Content-Length',0)) > 0 else ''
  • Note: The body will be a byte array, and not a string. You may need to decode it to a string. For example:

    import json
    body_raw = request.body.read(int(request.headers['Content-Length'])) if int(request.headers.get('Content-Length',0)) > 0 else '{}'
    body = json.loads(body_raw.decode('utf-8'))
    

• Include webhook-listener in your project
• Create an instance of the webhook_listener.Listener class
  • handlers = Dictionary of functions/callables for each supported HTTP method. (Example: {'POST':process_post_request, 'GET':process_get_request})
  • port = Port for the web server to listen on (default: 8090)
  • host = Host for the web server to listen on (default: '0.0.0.0')
  • threadPool = Number of worker threads for the web server (default: 10)
  • logScreen = Setting for cherrypy to log to screen (default: False)
  • autoReload = Setting for cherrypy to auto reload when python files are changed (default: False)
  • sslModule = Select which SSL library to use (default: 'builtin')
  • sslCert = Path to the certificate (SSL is disabled when empty)
  • sslPrivKey = Path to the certificate's private key (SSL is disabled when empty)
  • sslCertChain = Path to the full certificate chain see https://cherrypydocrework.readthedocs.io/deploy.html#ssl-support for more information on SSL support
• Start the Listener
• Keep your application running so the Listener can run in a separate thread

Example

import time
import webhook_listener


def process_post_request(request, *args, **kwargs):
    print(
        "Received request:\n"
        + "Method: {}\n".format(request.method)
        + "Headers: {}\n".format(request.headers)
        + "Args (url path): {}\n".format(args)
        + "Keyword Args (url parameters): {}\n".format(kwargs)
        + "Body: {}".format(
            request.body.read(int(request.headers["Content-Length"]))
            if int(request.headers.get("Content-Length", 0)) > 0
            else ""
        )
    )

    # Process the request!
    # ...

    return


webhooks = webhook_listener.Listener(handlers={"POST": process_post_request})
webhooks.start()

while True:
    print("Still alive...")
    time.sleep(300)