echo/website/content/guide/customization.md

title	menu
Customization	side parent weight guide 2

HTTP error handler

Echo#SetHTTPErrorHandler(h HTTPErrorHandler)

Registers a custom Echo#HTTPErrorHandler.

Default handler rules:

• If error is of type Echo#HTTPError it sends HTTP response with status code HTTPError.Code and message HTTPError.Message.
• Else it sends 500 - Internal Server Error.
• If debug mode is enabled, it uses error.Error() as status message.

Debug

Echo#SetDebug(on bool)

Enables/disables debug mode.

Disable colored log

Echo#DisableColoredLog()

Hook

Echo#Hook(http.HandlerFunc)

Hook registers a callback which is invoked from Echo#ServerHTTP as the first statement. Hook is useful if you want to modify response/response objects even before it hits the router or any middleware.

For example, the following hook strips the trailing slash from the request path.

e.Hook(func(w http.ResponseWriter, r *http.Request) {
    path := r.URL.Path
    l := len(path) - 1
    if path != "/" && path[l] == '/' {
        r.URL.Path = path[:l]
    }
})