wechat/qrcode.go

package wechat

import (
	"bytes"
	"encoding/base64"
	"errors"
	"fmt"
	"log"

	"git.tetele.net/tgo/helper"
)

// 获取小程序码
func GetMiniappQrcode(access_token string, qrcodeParamsMap map[string]interface{}) (string, error) {

	getCodeUrl := fmt.Sprintf(GET_MINIAPP_QRCODE, access_token)

	checkPath := true
	envVersion := "release"
	width := 430
	autoColor := false
	isHyaline := false

	if _, exist := qrcodeParamsMap["check_path"]; exist {
		checkPath = qrcodeParamsMap["check_path"].(bool)
	}

	if _, exist := qrcodeParamsMap["env_version"]; exist {
		envVersion = helper.ToStr(qrcodeParamsMap["env_version"])
	}

	if _, exist := qrcodeParamsMap["width"]; exist {
		width = helper.ToInt(qrcodeParamsMap["width"])
	}

	if _, exist := qrcodeParamsMap["auto_color"]; exist {
		autoColor = qrcodeParamsMap["auto_color"].(bool)
	}

	if _, exist := qrcodeParamsMap["is_hyaline"]; exist {
		isHyaline = qrcodeParamsMap["is_hyaline"].(bool)
	}

	requestData := map[string]interface{}{
		"scene":       qrcodeParamsMap["scene"],
		"page":        qrcodeParamsMap["page"],
		"check_path":  checkPath,
		"env_version": envVersion,
		"width":       width,
		"auto_color":  autoColor,
		"is_hyaline":  isHyaline,
	}
	// json.marshal 会转义&字符
	/*requestDataJson, err := json.Marshal(requestData)

	if err != nil {
		return "", err
	}*/

	bf := bytes.NewBuffer([]byte{})
	jsonEncoder := json.NewEncoder(bf)
	jsonEncoder.SetEscapeHTML(false)
	jsonEncoder.Encode(requestData)

	response, err := PostJson(getCodeUrl, bf.Bytes())

	log.Println("get mp qrcode response:", string(response), err)

	if err != nil {
		return "", err
	}

	responseData := map[string]interface{}{}
	err = json.Unmarshal(response, &responseData)
	if err != nil {
		// 有错，但能解析
		log.Println(err)
	}

	if _, exist := responseData["errcode"]; exist && helper.ToInt(responseData["errcode"]) != 0 {
		return "", errors.New(helper.ToStr(responseData["errmsg"]) + ",errcode:" + helper.ToStr(responseData["errcode"]))
	}

	return "data:image/png;base64," + base64.StdEncoding.EncodeToString(response), nil
}