// Recovery returns a middleware that recovers from any panics and writes a 500 if there was one.
// While Martini is in development mode, Recovery will also output the panic as HTML.
func Recovery() Handler {
return func(c Context, log *log.Logger) {
defer func() {
if err := recover(); err != nil {
stack := stack(3)
log.Printf("PANIC: %s\n%s", err, stack)
// Lookup the current responsewriter
val := c.Get(inject.InterfaceOf((*http.ResponseWriter)(nil)))
res := val.Interface().(http.ResponseWriter)
// respond with panic message while in development mode
var body []byte
if Env == Dev {
res.Header().Set("Content-Type", "text/html")
body = []byte(fmt.Sprintf(panicHtml, err, err, stack))
} else {
body = []byte("500 Internal Server Error")
}
res.WriteHeader(http.StatusInternalServerError)
if nil != body {
res.Write(body)
}
}
}()
c.Next()
}
}
func defaultReturnHandler() ReturnHandler {
return func(ctx Context, vals []reflect.Value) {
rv := ctx.Get(inject.InterfaceOf((*http.ResponseWriter)(nil)))
res := rv.Interface().(http.ResponseWriter)
var responseVal reflect.Value
if len(vals) > 1 && vals[0].Kind() == reflect.Int {
res.WriteHeader(int(vals[0].Int()))
responseVal = vals[1]
} else if len(vals) > 0 {
responseVal = vals[0]
}
if canDeref(responseVal) {
responseVal = responseVal.Elem()
}
if isByteSlice(responseVal) {
res.Write(responseVal.Bytes())
} else {
res.Write([]byte(responseVal.String()))
}
}
}