kuda.ai

Golang Path Parameters

Created on April 4, 2026

go

Since go v1.22, you can use r.PathValue("id"). Previously, you needed to hand parse it from r.URL.Path.

since go v1.22

// DELETE /activities/{id}
func (app *application) bellevueActivityDelete(w http.ResponseWriter, r *http.Request) {
	activityIDString := r.PathValue("id")
	activityID, err := strconv.Atoi(activityIDString)
	if err != nil {
		app.serverError(w, r, fmt.Errorf("invalid activityID in path, could not parse: %v", err))
		return
	}
}

before go v1.22

// DELETE /activities/{id}
func (app *application) bellevueActivityDelete(w http.ResponseWriter, r *http.Request) {

	// get ID from URL:
	parts := strings.Split(r.URL.Path, "/")

	// We expect: ["", "activities", "{ID}"]
	if len(parts) != 3 {
		log.Println("failed splitting request URL")
		app.renderClientError(w, r, http.StatusBadRequest)
		return
	}

        activityID := parts[2]