webhook/app/dependencies.py

45 lines
1.6 KiB
Python

from os import getenv
import hmac
from fastapi import Request
from fastapi.exceptions import HTTPException
async def check_ref(request: Request):
json = await request.json()
if json["ref"] and json["ref"] == f"refs/heads/{getenv('BRANCH')}":
return
raise HTTPException(status_code=202, detail="Invalid branch")
async def auth_hook(request: Request):
try:
json = await request.json()
text = await request.body()
except:
raise HTTPException(status_code=204, detail="Missing or bad content")
header_signature = request.headers.get('X-Hub-Signature')
if not header_signature:
raise HTTPException(status_code=400, detail="Missing signature")
# separate the signature from the sha1 indication
sha_name, signature = header_signature.split('=')
if sha_name != 'sha1':
raise HTTPException(status_code=400, detail="Invalid signature")
secret_key = getenv('WEBHOOK_SECRET')
if secret_key is None:
raise HTTPException(status_code=503, detail="Missing WEBHOOK_SECRET")
# create a new hmac with the secret key and the request data
mac = hmac.new(secret_key.encode(), msg=text, digestmod='sha1')
# verify the digest matches the signature
if not hmac.compare_digest(mac.hexdigest(), signature):
raise HTTPException(status_code=403, detail="Unauthorized")
async def auth_web(request: Request):
token = request._query_params.get("token")
if token is None or token is "":
raise HTTPException(status_code=400, detail="Missing token")
if token == getenv("TOKEN"):
return
raise HTTPException(status_code=403, detail="Invalid token")