273 lines
8.2 KiB
Python
273 lines
8.2 KiB
Python
# ContentDB
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# Copyright (C) 2018 rubenwardy
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from flask import Blueprint
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bp = Blueprint("github", __name__)
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from flask import redirect, url_for, request, flash, abort, render_template, jsonify, current_app
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from flask_user import current_user, login_required
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from sqlalchemy import func, or_, and_
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from app import github, csrf
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from app.models import db, User, APIToken, Package, Permission
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from app.utils import loginUser, randomString, abs_url_for
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from app.blueprints.api.support import error, handleCreateRelease
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import hmac, requests, json
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from flask_wtf import FlaskForm
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from wtforms import SelectField, SubmitField
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@bp.route("/github/start/")
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def start():
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return github.authorize("", redirect_uri=abs_url_for("github.callback"))
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@bp.route("/github/view/")
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def view_permissions():
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url = "https://github.com/settings/connections/applications/" + \
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current_app.config["GITHUB_CLIENT_ID"]
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return redirect(url)
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@bp.route("/github/callback/")
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@github.authorized_handler
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def callback(oauth_token):
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next_url = request.args.get("next")
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if oauth_token is None:
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flash("Authorization failed [err=gh-oauth-login-failed]", "danger")
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return redirect(url_for("user.login"))
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# Get Github username
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url = "https://api.github.com/user"
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r = requests.get(url, headers={"Authorization": "token " + oauth_token})
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username = r.json()["login"]
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# Get user by github username
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userByGithub = User.query.filter(func.lower(User.github_username) == func.lower(username)).first()
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# If logged in, connect
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if current_user and current_user.is_authenticated:
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if userByGithub is None:
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current_user.github_username = username
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db.session.commit()
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flash("Linked github to account", "success")
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return redirect(url_for("homepage.home"))
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else:
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flash("Github account is already associated with another user", "danger")
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return redirect(url_for("homepage.home"))
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# If not logged in, log in
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else:
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if userByGithub is None:
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flash("Unable to find an account for that Github user", "danger")
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return redirect(url_for("users.claim"))
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elif loginUser(userByGithub):
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if not current_user.hasPassword():
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return redirect(next_url or url_for("users.set_password", optional=True))
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else:
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return redirect(next_url or url_for("homepage.home"))
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else:
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flash("Authorization failed [err=gh-login-failed]", "danger")
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return redirect(url_for("user.login"))
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@bp.route("/github/webhook/", methods=["POST"])
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@csrf.exempt
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def webhook():
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json = request.json
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# Get package
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github_url = "github.com/" + json["repository"]["full_name"]
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package = Package.query.filter(Package.repo.ilike("%{}%".format(github_url))).first()
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if package is None:
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return error(400, "Could not find package, did you set the VCS repo in CDB correctly? Expected {}".format(github_url))
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# Get all tokens for package
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tokens_query = APIToken.query.filter(or_(APIToken.package==package,
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and_(APIToken.package==None, APIToken.owner==package.author)))
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possible_tokens = tokens_query.all()
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actual_token = None
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#
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# Check signature
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#
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header_signature = request.headers.get('X-Hub-Signature')
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if header_signature is None:
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return error(403, "Expected payload signature")
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sha_name, signature = header_signature.split('=')
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if sha_name != 'sha1':
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return error(403, "Expected SHA1 payload signature")
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for token in possible_tokens:
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mac = hmac.new(token.access_token.encode("utf-8"), msg=request.data, digestmod='sha1')
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if hmac.compare_digest(str(mac.hexdigest()), signature):
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actual_token = token
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break
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if actual_token is None:
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return error(403, "Invalid authentication, couldn't validate API token")
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if not package.checkPerm(actual_token.owner, Permission.APPROVE_RELEASE):
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return error(403, "You do not have the permission to approve releases")
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#
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# Check event
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#
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event = request.headers.get("X-GitHub-Event")
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if event == "push":
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ref = json["after"]
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title = json["head_commit"]["message"].partition("\n")[0]
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elif event == "create" and json["ref_type"] == "tag":
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ref = json["ref"]
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title = ref
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elif event == "ping":
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return jsonify({ "success": True, "message": "Ping successful" })
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else:
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return error(400, "Unsupported event. Only 'push', `create:tag`, and 'ping' are supported.")
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#
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# Perform release
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#
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return handleCreateRelease(actual_token, package, title, ref)
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class SetupWebhookForm(FlaskForm):
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event = SelectField("Event Type", choices=[('create', 'New tag or GitHub release'), ('push', 'Push')])
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submit = SubmitField("Save")
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@bp.route("/github/callback/webhook/")
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@github.authorized_handler
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def callback_webhook(oauth_token=None):
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pid = request.args.get("pid")
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if pid is None:
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abort(404)
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current_user.github_access_token = oauth_token
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db.session.commit()
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return redirect(url_for("github.setup_webhook", pid=pid))
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@bp.route("/github/webhook/new/", methods=["GET", "POST"])
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@login_required
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def setup_webhook():
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pid = request.args.get("pid")
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if pid is None:
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abort(404)
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package = Package.query.get(pid)
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if package is None:
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abort(404)
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if not package.checkPerm(current_user, Permission.APPROVE_RELEASE):
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flash("Only trusted members can use webhooks", "danger")
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return redirect(package.getDetailsURL())
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gh_user, gh_repo = package.getGitHubFullName()
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if gh_user is None or gh_repo is None:
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flash("Unable to get Github full name from repo address", "danger")
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return redirect(package.getDetailsURL())
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if current_user.github_access_token is None:
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return github.authorize("write:repo_hook",
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redirect_uri=abs_url_for("github.callback_webhook", pid=pid))
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form = SetupWebhookForm(formdata=request.form)
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if request.method == "POST" and form.validate():
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token = APIToken()
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token.name = "GitHub Webhook for " + package.title
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token.owner = current_user
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token.access_token = randomString(32)
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token.package = package
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event = form.event.data
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if event != "push" and event != "create":
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abort(500)
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if handleMakeWebhook(gh_user, gh_repo, package,
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current_user.github_access_token, event, token):
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flash("Successfully created webhook", "success")
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return redirect(package.getDetailsURL())
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else:
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return redirect(url_for("github.setup_webhook", pid=package.id))
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return render_template("github/setup_webhook.html",
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form=form, package=package)
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def handleMakeWebhook(gh_user, gh_repo, package, oauth, event, token):
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url = "https://api.github.com/repos/{}/{}/hooks".format(gh_user, gh_repo)
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headers = {
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"Authorization": "token " + oauth
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}
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data = {
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"name": "web",
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"active": True,
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"events": [event],
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"config": {
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"url": abs_url_for("github.webhook"),
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"content_type": "json",
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"secret": token.access_token
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},
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}
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# First check that the webhook doesn't already exist
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r = requests.get(url, headers=headers)
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if r.status_code == 401 or r.status_code == 403:
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current_user.github_access_token = None
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db.session.commit()
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return False
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if r.status_code != 200:
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flash("Failed to create webhook, received response from Github " +
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str(r.status_code) + ": " +
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str(r.json().get("message")), "danger")
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return False
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for hook in r.json():
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if hook.get("config") and hook["config"].get("url") and \
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hook["config"]["url"] == data["config"]["url"]:
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flash("Failed to create webhook, as it already exists", "danger")
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return False
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# Create it
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r = requests.post(url, headers=headers, data=json.dumps(data))
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if r.status_code == 201:
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db.session.add(token)
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db.session.commit()
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return True
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elif r.status_code == 401 or r.status_code == 403:
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current_user.github_access_token = None
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db.session.commit()
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return False
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else:
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flash("Failed to create webhook, received response from Github " +
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str(r.status_code) + ": " +
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str(r.json().get("message")), "danger")
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return False
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