94 lines
2.7 KiB
Python
94 lines
2.7 KiB
Python
import arrow
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from flask import request, session, redirect, url_for, flash
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from flask_login import login_user
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from requests_oauthlib import OAuth2Session
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from app.auth.base import auth_bp
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from app.config import GITHUB_CLIENT_ID, GITHUB_CLIENT_SECRET
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from app.email_utils import notify_admin
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from app.extensions import db
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from app.log import LOG
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from app.models import User
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from app.utils import random_string
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authorization_base_url = "https://github.com/login/oauth/authorize"
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token_url = "https://github.com/login/oauth/access_token"
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@auth_bp.route("/github/login")
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def github_login():
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github = OAuth2Session(GITHUB_CLIENT_ID, scope=["user:email"])
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authorization_url, state = github.authorization_url(authorization_base_url)
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# State is used to prevent CSRF, keep this for later.
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session["oauth_state"] = state
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return redirect(authorization_url)
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@auth_bp.route("/github/callback")
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def github_callback():
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github = OAuth2Session(
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GITHUB_CLIENT_ID, state=session["oauth_state"], scope=["user:email"]
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)
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token = github.fetch_token(
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token_url,
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client_secret=GITHUB_CLIENT_SECRET,
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authorization_response=request.url,
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)
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# a dict with "name", "login"
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github_user_data = github.get("https://api.github.com/user").json()
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LOG.d("user login with github %s", github_user_data)
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# return list of emails
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# {
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# 'email': 'abcd@gmail.com',
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# 'primary': False,
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# 'verified': True,
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# 'visibility': None
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# }
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emails = github.get("https://api.github.com/user/emails").json()
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# only take the primary email
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email = None
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for e in emails:
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if e.get("verified") and e.get("primary"):
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email = e.get("email")
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break
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if not email:
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raise Exception("cannot get email for github user")
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user = User.get_by(email=email)
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if user:
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login_user(user)
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# create user
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else:
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LOG.d("create github user")
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user = User.create(email=email, name=github_user_data["name"])
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# set a random password
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user.set_password(random_string(20))
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user.activated = True
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db.session.commit()
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login_user(user)
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flash(f"Welcome to SimpleLogin {user.name}!", "success")
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notify_admin(
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f"new user signs up {user.email}", f"{user.name} signs up at {arrow.now()}"
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)
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# The activation link contains the original page, for ex authorize page
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if "next" in request.args:
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next_url = request.args.get("next")
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LOG.debug("redirect user to %s", next_url)
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return redirect(next_url)
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else:
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LOG.debug("redirect user to dashboard")
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return redirect(url_for("dashboard.index"))
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