minimal hypothesis websocket client for python

README.md

This example shows how to listen on a websocket for updates to Hypothesis.

wsclient.py

import asyncio
import ssl
import uuid
import json
import certifi
import websockets
import traceback

def _ssl_context(verify=True):
    ssl_context = ssl.create_default_context(cafile=certifi.where())
    if not verify:
        ssl_context.check_hostname = False
        ssl_context.verify_mode = ssl.CERT_NONE
    return ssl_context

def main():
  async def hello(uri):
    async with websockets.connect(uri, ssl=_ssl_context(verify=True)) as ws:
      try:
        msg = json.dumps({'type': 'whoami','id': 1}) # expect: {"reply_to": 1, "type": "whoyouare", "userid": "acct:judell@hypothes.is", "ok": true}
        await ws.send(msg)
        msg = json.dumps({"filter":{"match_policy":"include_any","clauses":[{"field":"/group","operator":"one_of","value":["__world__"],}],"actions":{"create":True,"update":True,"delete":True}}})      
        await ws.send(msg)
        while True:
          print ('waiting')
          print(await(ws.recv()))
      except:
        print ('exception! closing socket')
        ws.close()
        raise

  while True:
    try:
      asyncio.get_event_loop().run_until_complete(
        hello('wss://hypothes.is/ws?access_token=...'))
    except:
      traceback.print_exc()
      continue 

if __name__ == '__main__':
    main()