Embed templates in binary

Makefile

 build: dist/go-httpbin
 
-dist/go-httpbin: *.go httpbin/*.go
+dist/go-httpbin: assets *.go httpbin/*.go
 	mkdir -p dist
 	go build -o dist/go-httpbin
 
+assets: httpbin/templates/*.html
+	go-bindata -o httpbin/templates.go -pkg=httpbin -prefix=httpbin/templates httpbin/templates
+
 test:
 	go test -v github.com/mccutchen/go-httpbin/httpbin
 

httpbin/handlers.go

@@ -9,33 +9,18 @@ import (
 
 // Index renders an HTML index page
 func (h *HTTPBin) Index(w http.ResponseWriter, r *http.Request) {
-	t := h.templates.Lookup("index.html")
-	if t == nil {
-		http.Error(w, fmt.Sprintf("error looking up index.html"), http.StatusInternalServerError)
-		return
-	}
-	t.Execute(w, nil)
+	w.Write(MustAsset("index.html"))
 }
 
 // FormsPost renders an HTML form that submits a request to the /post endpoint
 func (h *HTTPBin) FormsPost(w http.ResponseWriter, r *http.Request) {
-	t := h.templates.Lookup("forms-post.html")
-	if t == nil {
-		http.Error(w, fmt.Sprintf("error looking up index.html"), http.StatusInternalServerError)
-		return
-	}
-	t.Execute(w, nil)
+	w.Write(MustAsset("forms-post.html"))
 }
 
 // UTF8 renders an HTML encoding stress test
 func (h *HTTPBin) UTF8(w http.ResponseWriter, r *http.Request) {
-	t := h.templates.Lookup("utf8.html")
-	if t == nil {
-		http.Error(w, fmt.Sprintf("error looking up index.html"), http.StatusInternalServerError)
-		return
-	}
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	t.Execute(w, nil)
+	w.Write(MustAsset("utf8.html"))
 }
 
 // Get handles HTTP GET requests

httpbin/httpbin.go

 package httpbin
 
 import (
-	"html/template"
-	"log"
 	"net/http"
 	"net/url"
 )
@@ -46,8 +44,7 @@ type Options struct {
 
 // HTTPBin contains the business logic
 type HTTPBin struct {
-	options   *Options
-	templates *template.Template
+	options *Options
 }
 
 // Handler returns an http.Handler that exposes all HTTPBin endpoints
@@ -76,14 +73,7 @@ func NewHTTPBin(options *Options) *HTTPBin {
 	if options == nil {
 		options = &Options{}
 	}
-
-	t, err := template.ParseGlob("templates/*.html")
-	if err != nil {
-		log.Fatalf("error parsing templates: %s", err)
-	}
-
 	return &HTTPBin{
-		options:   options,
-		templates: t,
+		options: options,
 	}
 }