147 lines
4.6 KiB
Python
147 lines
4.6 KiB
Python
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 requests_oauthlib.compliance_fixes import facebook_compliance_fix
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from app import email_utils
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from app.auth.base import auth_bp
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from app.auth.views.google import create_file_from_url
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from app.config import (
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URL,
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FACEBOOK_CLIENT_ID,
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FACEBOOK_CLIENT_SECRET,
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DISABLE_REGISTRATION,
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)
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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 .login_utils import after_login
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from ...email_utils import can_be_used_as_personal_email
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_authorization_base_url = "https://www.facebook.com/dialog/oauth"
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_token_url = "https://graph.facebook.com/oauth/access_token"
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_scope = ["email"]
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# need to set explicitly redirect_uri instead of leaving the lib to pre-fill redirect_uri
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# when served behind nginx, the redirect_uri is localhost... and not the real url
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_redirect_uri = URL + "/auth/facebook/callback"
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@auth_bp.route("/facebook/login")
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def facebook_login():
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# to avoid flask-login displaying the login error message
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session.pop("_flashes", None)
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next_url = request.args.get("next")
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# Facebook does not allow to append param to redirect_uri
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# we need to pass the next url by session
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if next_url:
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session["facebook_next_url"] = next_url
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facebook = OAuth2Session(
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FACEBOOK_CLIENT_ID, scope=_scope, redirect_uri=_redirect_uri
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)
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facebook = facebook_compliance_fix(facebook)
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authorization_url, state = facebook.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("/facebook/callback")
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def facebook_callback():
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# user clicks on cancel
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if "error" in request.args:
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flash("Please use another sign in method then", "warning")
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return redirect("/")
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facebook = OAuth2Session(
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FACEBOOK_CLIENT_ID,
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state=session["oauth_state"],
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scope=_scope,
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redirect_uri=_redirect_uri,
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)
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facebook = facebook_compliance_fix(facebook)
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token = facebook.fetch_token(
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_token_url,
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client_secret=FACEBOOK_CLIENT_SECRET,
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authorization_response=request.url,
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)
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# Fetch a protected resource, i.e. user profile
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# {
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# "email": "abcd@gmail.com",
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# "id": "1234",
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# "name": "First Last",
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# "picture": {
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# "data": {
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# "url": "long_url"
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# }
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# }
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# }
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facebook_user_data = facebook.get(
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"https://graph.facebook.com/me?fields=id,name,email,picture{url}"
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).json()
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email = facebook_user_data.get("email")
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# user choose to not share email, cannot continue
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if not email:
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flash(
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"In order to use SimpleLogin, you need to give us a valid email", "warning"
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)
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return redirect(url_for("auth.register"))
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user = User.get_by(email=email)
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picture_url = facebook_user_data.get("picture", {}).get("data", {}).get("url")
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if user:
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if picture_url and not user.profile_picture_id:
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LOG.d("set user profile picture to %s", picture_url)
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file = create_file_from_url(picture_url)
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user.profile_picture_id = file.id
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db.session.commit()
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# create user
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else:
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if DISABLE_REGISTRATION:
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flash("Registration is closed", "error")
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return redirect(url_for("auth.login"))
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if not can_be_used_as_personal_email(email):
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flash(
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f"You cannot use {email} as your personal inbox.", "error",
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)
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return redirect(url_for("auth.login"))
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LOG.d("create facebook user with %s", facebook_user_data)
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user = User.create(
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email=email.lower(), name=facebook_user_data["name"], activated=True
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)
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if picture_url:
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LOG.d("set user profile picture to %s", picture_url)
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file = create_file_from_url(picture_url)
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user.profile_picture_id = file.id
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db.session.commit()
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login_user(user)
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email_utils.send_welcome_email(user.email, user.name)
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flash(f"Welcome to SimpleLogin {user.name}!", "success")
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next_url = None
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# The activation link contains the original page, for ex authorize page
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if "facebook_next_url" in session:
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next_url = session["facebook_next_url"]
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LOG.debug("redirect user to %s", next_url)
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# reset the next_url to avoid user getting redirected at each login :)
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session.pop("facebook_next_url", None)
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return after_login(user, next_url)
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