This is used to trap uncaught errors from future middleware and return a 500 Internal Service Error instead of nothing Previous Middleware are typically used to filter the error into something more presentable, and/or report the error to your error tracking service

go get github.com/ScruffyProdigy/Middleware/errorhandler

http://godoc.org/github.com/ScruffyProdigy/Middleware/errorhandler

• Just add errorhandler.ErrorHandler to your rack

package main

import (
	"github.com/ScruffyProdigy/Middleware/errorhandler"
	"github.com/ScruffyProdigy/TheRack/httper"
	"github.com/ScruffyProdigy/TheRack/rack"
)

var HelloWorldWare rack.Func = func(vars map[string]interface{}, next func()) {
	array := make([]byte, 0)
	array[1] = 0 //this action results in a runtime error; we are indexing past the range of the slice
}

func main() {
	rackup := rack.New()
	rackup.Add(errorhandler.ErrorHandler)
	rackup.Add(HelloWorldWare)

	conn := httper.HttpConnection(":3000")
	conn.Go(rackup)
}

when run, it should simply display "runtime error: index out of range", as there is a runtime error inside of the HelloWorldWare. The status code returned is a "500 - Internal Service Error"