小程序本地图片base64上传

<script type="text/javascript">
    this.imgshow2 = localIds;
    wx.getLocalImgData({
      localId: localIds[0],//图片的本地ID
      success: res => {
        var localData = res.localData;
        if (localData.indexOf('data:image') != 0) {
            //判断是否有这样的头部
            localData = 'data:image/jpeg;base64,' +  localData;
        }
        localData = localData.replace(/\r|\n/g, '').replace('data:image/jgp', 'data:image/jpeg');
        this.Fetch({ url: '/asyncUpload/uploadImgBase64.gu', body: { base64: localData } }).then(res => {
          if (!res) {
            this.$vux.toast.show({
              text: '上传失败',
              type: 'warn'
            })
          } else {
            this[`image2`] = res
          }
        }).catch(err => {
            this.$vux.toast.show({
            text: '上传出错,请重试',
            type: 'warn'
          })
        })
      }
    });
</script>