{"id":25030,"date":"2023-06-06T13:49:00","date_gmt":"2023-06-06T11:49:00","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/?p=25030"},"modified":"2025-01-24T10:42:42","modified_gmt":"2025-01-24T09:42:42","slug":"using-webhooks-from-gitlab-to-execute-external-code-and-tools","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/using-webhooks-from-gitlab-to-execute-external-code-and-tools\/","title":{"rendered":"Using WebHook’s from GitLab to execute external code and tools"},"content":{"rendered":"\n

by Alexandre Nestor<\/p>\n\n\n\n

Introduction<\/h2>\n\n\n\n

WebHooks are HTTP callbacks that are triggered by events. In case of GitLab<\/a> these can be events like pushing some code, or creating an issue, or pushing some comments.<\/p>\n\n\n\n

In this quick post I will explain how to add a WebHook to a project and how to execute some external code when a Gitlab event is triggered.<\/p>\n\n\n\n

VM preparation<\/h3>\n\n\n\n

Do not forget to open the firewall port for TCP<\/code> protocol, on 8200<\/code> port must be opened.<\/p>\n\n\n

\n[root@wb ~]# firewall-cmd --list-all\npublic (active)\n  target: default\n  icmp-block-inversion: no\n  interfaces: ens3\n  sources:\n  services: dhcpv6-client http ssh\n  ports:\n  protocols:\n  forward: no\n  masquerade: no\n  forward-ports:\n  source-ports:\n  icmp-blocks:\n  rich rules:\n\n[root@wb ~]# firewall-cmd --zone=public --add-port=8200\/tcp\nsuccess\n\n[root@wb ~]# firewall-cmd --list-all\npublic (active)\n  target: default\n  icmp-block-inversion: no\n  interfaces: ens3\n  sources:\n  services: dhcpv6-client http ssh\n  ports: 8200\/tcp\n  protocols:\n  forward: no\n  masquerade: no\n  forward-ports:\n  source-ports:\n  icmp-blocks:\n  rich rules:\n  \n<\/pre><\/div>\n\n\n
Python code<\/h3>\n\n\n\n
An easy way is to use Flask<\/a><\/code>, to retrieve the HTTP<\/code> frame.<\/p>\n\n\n
\n#\u00a0app.py \nfrom flask import Flask, request, abort\nimport json\n\napp = Flask(__name__)\n\n@app.route('\/my_webhook', methods=['POST'])\ndef my_webhook():\n    if request.method == 'POST':\n        print(json.dumps(request.json, indent=2))\n        return 'success', 200\n    else:\n        abort(400)\n\nif __name__ == '__main__':\n    app.run(host='0.0.0.0', port=8200, debug=True)\n<\/pre><\/div>\n\n\n