Lifecyle Hooks

[grant]

Certain use-cases require function invocations on certain events related to a container's lifecycle or individual function invocation lifecycle.

Here are some possible examples:

• on('bad_request', (req, res) => {})
  • Handle bad HTTP request (400)
• on('startup', (req, res) => {})
  • Invoke once after the container is started and before the first HTTP request.
• on('shutdown', (req, res) => {})
  • Invoke once before the container is terminated.
• on('before_function', (req, res) => {})
  • Invoke before every function invocation
• on('after_function', (req, res) => {})
  • Invoke after every function invocation

An example API could be the following:

functionsframework.on('bad_request', (e, req, res, next) {
    if (e.message === "Bad request") {
        res.status(400).json({error: {msg: e.message, stack: e.stack}});
    }
});

---

Feel free to add to this issue for your use-case in a comment.