1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package main 6 7 import ( 8 "flag" 9 "html/template" 10 "log" 11 "net/http" 12 ) 13 14 var addr = flag.String("addr", ":1718", "http service address") // Q=17, R=18 15 16 var templ = template.Must(template.New("qr").Parse(templateStr)) 17 18 func main() { 19 flag.Parse() 20 http.Handle("/", http.HandlerFunc(QR)) 21 err := http.ListenAndServe(*addr, nil) 22 if err != nil { 23 log.Fatal("ListenAndServe:", err) 24 } 25 } 26 27 func QR(w http.ResponseWriter, req *http.Request) { 28 templ.Execute(w, req.FormValue("s")) 29 } 30 31 const templateStr = ` 32 <html> 33 <head> 34 <title>QR Link Generator</title> 35 </head> 36 <body> 37 {{if .}} 38 <img src="http://chart.apis.google.com/chart?chs=300x300&cht=qr&choe=UTF-8&chl={{.}}" /> 39 <br> 40 {{.}} 41 <br> 42 <br> 43 {{end}} 44 <form action="/" name=f method="GET"><input maxLength=1024 size=70 45 name=s value="" title="Text to QR Encode"><input type=submit 46 value="Show QR" name=qr> 47 </form> 48 </body> 49 </html> 50 ` 51
