wx.chooseImage({
 count:1,
 success(res) {
   let url = res.tempFilePaths[0];
   wx.serviceMarket.invokeService({
     service: 'wx79ac3de8be320b71',
     api: 'OcrAllInOne',
     data: {
       img_url: url,
       data_type: 3,
       ocr_type: 1,
     },
   }).then(res => {
     console.log(res);
   }).catch(err => console.log(err))
 }
})

报错：

Error: invokeService:fail operateWXData:fail (err_code -2)
    at VM4738 WAService.js:2
    at VM4738 WAService.js:2
    at Object.throw (VM4738 WAService.js:2)
    at o (VM4738 WAService.js:2)