二维码/条形码的生成

business/jxutils/jxutils_cms.go

@@ -11,12 +11,25 @@ import (
 	"strings"
 	"sync"
 	"time"
-
+	"errors"
+	"image/png"
+	"os"
+	"encoding/base64"
 	"git.rosy.net.cn/baseapi/platformapi"
 	"git.rosy.net.cn/baseapi/utils"
 	"git.rosy.net.cn/jx-callback/business/model"
 	"git.rosy.net.cn/jx-callback/business/model/dao"
 	"git.rosy.net.cn/jx-callback/globals"
+	"github.com/boombuler/barcode"
+	"github.com/boombuler/barcode/qr"
+	"github.com/boombuler/barcode/code128"
+)
+
+const (
+	MaxCodeWidth  = 400
+	MaxCodeHeight = 400
+	CodeTypeQr 	  = "qr"
+	CodeTypeBar	  = "bar"
 )
 
 var (
@@ -451,3 +464,82 @@ func CaculateSkuEarningPrice(shopPrice, salePrice int64, storePayPercentage int)
 	earningPrice = earningPrice * int64(storePayPercentage) / 100
 	return earningPrice
 }
+
+func File2BytesByFileName(filename string) ([]byte, error) {
+	file, err := os.Open(filename)
+	defer file.Close()
+    if err != nil {
+		return nil, err
+    }
+
+    return File2BytesByFile(file)
+}
+
+func File2BytesByFile(file *os.File) ([]byte, error) {
+    stats, err := file.Stat()
+    if err != nil {
+        return nil, err
+    }
+
+    data := make([]byte, stats.Size())
+    _, err = file.Read(data)
+    if err != nil {
+		return nil, err
+    }
+
+    return data, nil
+}
+
+func CreateCodeImage(qrCode barcode.Barcode) (fileName string, err error) {
+	fileName = "qrcode.png"
+	file, err := os.Create(fileName)
+	defer file.Close()
+	if err == nil {
+		err = png.Encode(file, qrCode)
+	}
+
+	return fileName, err
+}
+
+func GetImgBase64(qrCode barcode.Barcode) (imgBase64 string, err error) {
+	fileName, err := CreateCodeImage(qrCode)
+	if err == nil {
+		fileData, err := File2BytesByFileName(fileName)
+		if err == nil {
+			imgBase64 = "data:image/png;base64," + base64.StdEncoding.EncodeToString(fileData)
+		}
+	}
+
+	return imgBase64, err
+}
+
+func CreateQrAndBarCode(width, height int, codetype, srcData string) (imgBase64 string, err error) {
+	if width > MaxCodeWidth {
+		width = MaxCodeWidth
+	}
+	if height > MaxCodeHeight {
+		height = MaxCodeHeight
+	}
+
+	if codetype == CodeTypeQr {
+		qrCode, err := qr.Encode(srcData, qr.M, qr.Auto)
+		if err == nil {
+			qrCode, err = barcode.Scale(qrCode, width, height)
+			if err == nil {
+				imgBase64, err = GetImgBase64(qrCode)
+			}
+		}
+	} else if codetype == CodeTypeBar {
+		cs, err := code128.Encode(srcData)
+		if err == nil { 
+			qrCode, err2 := barcode.Scale(cs, width, height)
+			if err = err2; err == nil {
+				imgBase64, err = GetImgBase64(qrCode)
+			}
+		}
+	} else {
+		err = errors.New(fmt.Sprintf("未知编码类型:%s", codetype))
+	}
+
+	return imgBase64, err
+}