INNER CODE UNIT · Go

Headers

megaease/easemesh · go-sdk/stdlib/stdlib.go:113

func Headers() []string {
	return DefaultAgent.Headers()
}

// WrapHandleFunc wraps http.HandleFunc to serve agent role.
// It copies canary headers to reponse writer, the function itself must not alter them.
func (a *Agent) WrapHandleFunc(fn http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		keys := a.headers.Load().([]string)
		for k, v := range r.Header.Clone() {
			if strInSlice(k, keys) {
				w.Header()[k] = v
			}
		}

		fn(w, r)

		// NOTE: Copying headers after fn it might not take effect,

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