Fix VCS webhooks assuming repo URLs are unique

Fixes #264

app/blueprints/vcs/gitlab.py

@@ -0,0 +1,81 @@
+# ContentDB
+# Copyright (C) 2020-24  rubenwardy
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import datetime
+
+from flask import request, jsonify
+
+from app import csrf
+from app.blueprints.api.support import error, api_create_vcs_release
+from app.models import APIToken
+
+from . import bp
+from .common import get_packages_for_vcs_and_token
+
+
+def webhook_impl():
+	json = request.json
+
+	# Get all tokens for package
+	secret = request.headers.get("X-Gitlab-Token")
+	if secret is None:
+		return error(403, "Token required")
+
+	token: APIToken = APIToken.query.filter_by(access_token=secret).first()
+	if token is None:
+		return error(403, "Invalid authentication")
+
+	packages = get_packages_for_vcs_and_token(token, json["project"]["web_url"].replace("https://", "").replace("http://", ""))
+	for package in packages:
+		#
+		# Check event
+		#
+		event = json["event_name"]
+		if event == "push":
+			ref = json["after"]
+			title = datetime.datetime.utcnow().strftime("%Y-%m-%d") + " " + ref[:5]
+			branch = json["ref"].replace("refs/heads/", "")
+			if branch not in ["master", "main"]:
+				continue
+		elif event == "tag_push":
+			ref = json["ref"]
+			title = ref.replace("refs/tags/", "")
+		else:
+			return error(400, "Unsupported event: '{}'. Only 'push', 'create:tag', and 'ping' are supported."
+					.format(event or "null"))
+
+		#
+		# Perform release
+		#
+		if package.releases.filter_by(commit_hash=ref).count() > 0:
+			continue
+
+		return api_create_vcs_release(token, package, title, ref, reason="Webhook")
+
+	return jsonify({
+		"success": False,
+		"message": "No release made. Either the release already exists or the event was filtered based on the branch"
+	})
+
+
+
+@bp.route("/gitlab/webhook/", methods=["POST"])
+@csrf.exempt
+def gitlab_webhook():
+	try:
+		return webhook_impl()
+	except KeyError as err:
+		return error(400, "Missing field: {}".format(err.args[0]))