| package main |
| |
| import ( |
| "flag" |
| "log" |
| "net/http" |
| "text/template" |
| ) |
| |
| 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={{urlquery .}}" /> |
| <br> |
| {{html .}} |
| <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> |
| ` |
