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https://github.com/chai2010/qrcode
QR code encoder/decoder
https://github.com/chai2010/qrcode
Last synced: about 2 months ago
JSON representation
QR code encoder/decoder
- Host: GitHub
- URL: https://github.com/chai2010/qrcode
- Owner: chai2010
- License: bsd-3-clause
- Created: 2014-10-16T05:51:20.000Z (about 10 years ago)
- Default Branch: master
- Last Pushed: 2020-03-31T15:16:18.000Z (almost 5 years ago)
- Last Synced: 2024-11-01T12:42:16.775Z (2 months ago)
- Language: Go
- Homepage: http://godoc.org/github.com/chai2010/qrcode
- Size: 3.38 MB
- Stars: 18
- Watchers: 3
- Forks: 6
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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----
QR code encoder/decoder
=======================
PkgDoc: [http://godoc.org/github.com/chai2010/qrcode](http://godoc.org/github.com/chai2010/qrcode)
Install
=======
Install `GCC` or `MinGW` ([download here](http://tdm-gcc.tdragon.net/download)) at first,
and then run these commands:
1. `go get -d github.com/chai2010/qrcode`
2. `go generate` and `go install`
3. `go run hello.go`
**Notes**
If use `TDM-GCC`, and build error like this:
c:\tdm-gcc-64\x86_64-w64-mingw32\include\aviriff.h:3:25: error: 'refer' does not
name a type
* No warranty is given; refer to the file DISCLAIMER within this package.
...
You need fix the `C:\TDM-GCC-64\x86_64-w64-mingw32\include\aviriff.h` header first:
** // fixit: ** -> /**
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER within this package.
*/
Example
=======
```Go
// Copyright 2014 . All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ingore
// QR codes encoder.
package main
import (
"bytes"
"flag"
"fmt"
"image"
_ "image/jpeg"
_ "image/png"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"github.com/chai2010/qrcode"
)
var (
flagText = flag.String("text", "[email protected]", "Set text")
flagLevel = flag.String("n", "Q", "Set QR encode level(L|M|Q|H), default is 'Q'.")
flagOutput = flag.String("o", "qrcode.png", "Set output filename (PNG only).")
)
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [options] text\n", filepath.Base(os.Args[0]))
flag.PrintDefaults()
}
}
func main() {
flag.Parse()
filename := filepath.Clean(*flagOutput)
if filename == "" {
filename = "qr.png"
}
if !strings.HasSuffix(strings.ToLower(filename), ".png") {
filename += ".png"
}
level := qrcode.Q
switch strings.ToUpper(*flagLevel) {
case "L":
level = qrcode.L
case "M":
level = qrcode.M
case "Q":
level = qrcode.Q
case "H":
level = qrcode.H
}
code, err := qrcode.Encode(*flagText, level)
if err != nil {
log.Fatal(err)
}
err = ioutil.WriteFile(filename, code.PNG(), 0666)
if err != nil {
log.Fatal(err)
}
fmt.Println("Save as:", filename)
// Load file data
data, err := ioutil.ReadFile("testdata/01-1.jpg")
if err != nil {
log.Fatal(err)
}
// Decode image
m, _, err := image.Decode(bytes.NewReader(data))
if err != nil {
log.Fatal(err)
}
// Decode QR Code
text, err := qrcode.Decode(m)
if err != nil {
log.Fatal(err)
}
fmt.Println("testdata/01-1.jpg:", text)
}
```
BUGS
====
Report bugs to .
Thanks!