matrix-webhook/matrix_webhook/handler.py

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2021-08-08 02:41:37 -04:00
"""Matrix Webhook main request handler."""
import json
import logging
from http import HTTPStatus
from markdown import markdown
from . import conf, formatters, utils
LOGGER = logging.getLogger("matrix_webhook.handler")
async def matrix_webhook(request):
"""
Coroutine given to the server, st. it knows what to do with an HTTP request.
This one handles a POST, checks its content, and forwards it to the matrix room.
"""
LOGGER.debug(f"Handling {request=}")
data = await request.read()
try:
data = json.loads(data.decode())
except json.decoder.JSONDecodeError:
return utils.create_json_response(HTTPStatus.BAD_REQUEST, "Invalid JSON")
# legacy naming
if "text" in data and "body" not in data:
data["body"] = data["text"]
# allow key to be passed as a parameter
if "key" in request.rel_url.query and "key" not in data:
data["key"] = request.rel_url.query["key"]
if "formatter" in request.rel_url.query:
try:
data = getattr(formatters, request.rel_url.query["formatter"])(data)
except AttributeError:
return utils.create_json_response(
HTTPStatus.BAD_REQUEST, "Unknown formatter"
)
if "room_id" in request.rel_url.query and "room_id" not in data:
data["room_id"] = request.rel_url.query["room_id"]
if "room_id" not in data:
data["room_id"] = request.path.lstrip("/")
missing = []
for key in ["body", "key", "room_id"]:
if key not in data or not data[key]:
missing.append(key)
if missing:
return utils.create_json_response(
HTTPStatus.BAD_REQUEST, f"Missing {', '.join(missing)}"
)
if data["key"] != conf.API_KEY:
return utils.create_json_response(HTTPStatus.UNAUTHORIZED, "Invalid API key")
if "formatted_body" in data:
formatted_body = data["formatted_body"]
else:
formatted_body = markdown(str(data["body"]), extensions=["extra"])
content = {
"msgtype": "m.text",
"body": data["body"],
"format": "org.matrix.custom.html",
"formatted_body": formatted_body,
}
return await utils.send_room_message(data["room_id"], content)