doc/progs/eff_qr.go - go - Git at Google

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

 package main

 import (
 	"flag"
 	"html/template"
 	"log"
 	"net/http"
 )

 var addr = flag.String("addr", ":1718", "http service address") // Q=17, R=18

 var templ = template.Must(template.New("qr").Parse(templateStr))

 func main() {
 	flag.Parse()
 	http.Handle("/", http.HandlerFunc(QR))
 	err := http.ListenAndServe(*addr, nil)
 	if err != nil {
 		log.Fatal("ListenAndServe:", err)
 	}
 }

 func QR(w http.ResponseWriter, req *http.Request) {
 	templ.Execute(w, req.FormValue("s"))
 }

 const templateStr = `
 <html>
 <head>
 <title>QR Link Generator</title>
 </head>
 <body>
 {{if .}}
 <img src="http://chart.apis.google.com/chart?chs=300x300&cht=qr&choe=UTF-8&chl={{.}}" />
 <br>
 {{.}}
 <br>
 <br>
 {{end}}
 <form action="/" name=f method="GET"><input maxLength=1024 size=70
 name=s value="" title="Text to QR Encode"><input type=submit
 value="Show QR" name=qr>
 </form>
 </body>
 </html>
 `
	// Copyright 2009 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	package main

	import (
	"flag"
	"html/template"
	"log"
	"net/http"
	)

	var addr = flag.String("addr", ":1718", "http service address") // Q=17, R=18

	var templ = template.Must(template.New("qr").Parse(templateStr))

	func main() {
	flag.Parse()
	http.Handle("/", http.HandlerFunc(QR))
	err := http.ListenAndServe(*addr, nil)
	if err != nil {
	log.Fatal("ListenAndServe:", err)
	}
	}

	func QR(w http.ResponseWriter, req *http.Request) {
	templ.Execute(w, req.FormValue("s"))
	}

	const templateStr = `
	<html>
	<head>
	<title>QR Link Generator</title>
	</head>
	<body>
	{{if .}}
	<img src="http://chart.apis.google.com/chart?chs=300x300&cht=qr&choe=UTF-8&chl={{.}}" />
	<br>
	{{.}}
	<br>
	<br>
	{{end}}
	<form action="/" name=f method="GET"><input maxLength=1024 size=70
	name=s value="" title="Text to QR Encode"><input type=submit
	value="Show QR" name=qr>
	</form>
	</body>
	</html>
	`