Wisp Example: Configuring default responses#

gleam run   # Run the server
gleam test  # Run the tests

Wisp has a response body value called Empty, which is just that: an empty body. It can be returned by middleware functions such as wisp.require_json when the request isn't suitable for request handler to run, such as if the request body contains invalid JSON.

You likely want your application to return a generic error page rather than an empty body, and this example shows how to do that.

This example is based off of the "routing" example so read that first. The additions are detailed here and commented in the code.

app/router module#

The handle_request function has been updated to return responses with the wisp.Empty body.

app/web module#

The middleware function has been updated to return default responses when an wisp.Empty response body is returned.

app_test module#

Tests have been added to test each of the .

Other files#

No changes have been made to the other files.