Initial commit.
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Moon Man
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from flask import Flask, Response, redirect
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from flask import request
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from markupsafe import escape
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from mastodon import Mastodon
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from email.headerregistry import Address
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import jwt
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import shelve
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from gevent.pywsgi import WSGIServer
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import os
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SECRET = os.environ["SECRET"]
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ZULIP = f"https://{os.environ['ZULIP']}/accounts/login/jwt/"
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REDIRECT = f"https://{os.environ['ZULIP']}/callback"
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SHELVE_LOCATION = os.environ.get("DB_DIR", "/var/lib/fedi-zulip")
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PORT = int(os.environ.get("PORT", "5000"))
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app = Flask(__name__)
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@app.get("/")
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def index():
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return f"""
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<!DOCTYPE html>
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<html lang="en">
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<body>
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<h1>Login to Pleroma Chat Using Handle</h1>
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<p>
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You can use this page to login to {os.environ['ZULIP']} using your
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Pleroma, Akkoma or Mastodon handle. Format is <code>nickname@server</code>.
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</p>
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<form action="/login" method="post">
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<label for="nickname">Fediverse handle</label>
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<br>
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<input type="email" id="nickname" name="nickname">
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<button>login</button>
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</form>
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</body>
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</html>
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"""
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@app.post("/login")
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def login():
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instance = Address(addr_spec=request.form["nickname"]).domain
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try:
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with shelve.open(SHELVE_LOCATION) as apps:
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app = apps.get(instance)
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if app == None:
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(client, secret) = Mastodon.create_app(
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"zulip",
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scopes=["read"],
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redirect_uris=REDIRECT,
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api_base_url=f"https://{instance}",
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)
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apps[instance] = (client, secret)
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(client, secret) = apps[instance]
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masto = Mastodon(
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client_id=client,
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client_secret=secret,
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api_base_url=f"https://{instance}",
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)
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oauth = Mastodon.auth_request_url(
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masto,
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scopes=["read"],
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force_login=True,
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redirect_uris=REDIRECT,
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state=instance,
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)
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return redirect(oauth)
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except Exception as e:
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print(e)
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return Response("fail", status=400)
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@app.get("/callback")
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def callback():
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oauth = request.args.get("code")
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instance = request.args.get("state")
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if oauth != None and instance != None:
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try:
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with shelve.open(SHELVE_LOCATION) as apps:
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app = apps.get(instance)
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if app != None:
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masto = Mastodon(
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client_id=app[0],
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client_secret=app[1],
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api_base_url=f"https://{instance}",
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)
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Mastodon.log_in(masto, code=oauth, scopes=["read"])
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creds = Mastodon.account_verify_credentials(masto)
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token = jwt.encode(
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{"email": f"{creds.acct}@{instance}"},
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SECRET,
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algorithm="HS256",
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)
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return f"""
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<!DOCTYPE html>
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<html lang="en">
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<body>
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<form name="zulip" action="{ZULIP}" method="post">
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<input type="hidden" name="token" value={escape(token)}>
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<button>login to zulip</button>
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</form>
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<script type="text/javascript">
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document.zulip.submit();
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</script>
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</body>
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</html>
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"""
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except:
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pass
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return Response("fail", status=400)
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http_server = WSGIServer(("127.0.0.1", PORT), app)
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http_server.serve_forever()
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@ -0,0 +1,3 @@
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flask
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markupsafe
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mastodon
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