Using the render package

If you want rendering JSON and HTML to be even simpler, there is the
github.com/unrolled/render package. This package was inspired by the
martini-contrib/render package and is my goto when it comes to rendering data
for presentation in my web applications.

  1. package main
  3. import (
  4.     "net/http"
  6.     "gopkg.in/unrolled/render.v1"
  7. )
  9. func main() {
  10.     r := render.New(render.Options{})
  11.     mux := http.NewServeMux()
  13.     mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
  14.         w.Write([]byte("Welcome, visit sub pages now."))
  15.     })
  17.     mux.HandleFunc("/data", func(w http.ResponseWriter, req *http.Request) {
  18.         r.Data(w, http.StatusOK, []byte("Some binary data here."))
  19.     })
  21.     mux.HandleFunc("/json", func(w http.ResponseWriter, req *http.Request) {
  22.         r.JSON(w, http.StatusOK, map[string]string{"hello": "json"})
  23.     })
  25.     mux.HandleFunc("/html", func(w http.ResponseWriter, req *http.Request) {
  26.         // Assumes you have a template in ./templates called "example.tmpl"
  27.         // $ mkdir -p templates && echo "<h1>Hello {{.}}.</h1>" > templates/example.tmpl
  28.         r.HTML(w, http.StatusOK, "example", nil)
  29.     })
  31.     http.ListenAndServe(":8080", mux)
  32. }

Exercises

  1. Have fun playing with all of the options available when calling render.New()
  2. Try using the .yield helper function (with the curly braces) and a layout with HTML templates.