Could a router have a specific error handler ?

[kapouer]

I understand that the (err, req, res, next) signature is not supported, however,
that feature is really missing.
For example, my app have three separate routers with totally different behaviors:

• generates html pages
• the api
• static files

and each router needs to deal with errors very differently.

[kartikk221]

Hello, as you may have read from previous issues and documentation, the hyper-express middleware system at the moment is very different from Express.js in both its operation and internal logic.

• Middlewares and Routes are different without sharing the same signature.
• Middlewares execute in a hierarchical manner where order is GLOBAL -> LOCAL -> ROUTE_SPECIFIC

Unfortunately, we only support a global error handler at the moment. I do think that a router specific error handler should be possible in theory since it would be an additive change rather than a breaking one.

Do you have reference on the signature, behavior and expectation of this feature?

[kapouer]

A router-specific error handler would just have to get the error and be able to res.send() something.

Also while you are considering this, I think currently hyper-express doesn't catch errors when calling a middleware with (req, res, next) signature ?