https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/ocr/ocr.businessLicense.html

尝试了两种方式，

第一种img_url:

async readBizLicense(imgUrl){

let at = await this.getAccessToken()

let readUrl = 'https://api.weixin.qq.com/cv/ocr/bizlicense?access_token=' + at

let data = {img_url: imgUrl}

console.log("data", data)

let content = await http({url: readUrl,method: 'POST',data: data}).then(res => {

console.log(res.data)

return res.data

})

return content

}

img_url的格式是https://.../xx.jpg，尝试过直接给出，encodeUrl和encodeUrlComponent三种方式，均报41005错误, media data missing hint.

第二种img:buffer:

const stream = await this.ctx.getFileStream();

let result = null;

let fullpath = uploadPath + "/license/"

        if (!fs.existsSync(fullpath)) fs.mkdirSync(fullpath)

        let filename = encodeURIComponent(stream.filename)

        let extname = path.extname(filename)

        filename = this.ctx.helper.getUUID() + extname

        const target = path.join(this.config.baseDir, fullpath, filename);

        const writeStream = fs.createWriteStream(target);

        await pump(stream, writeStream);

let data = fs.readFileSync(target);

let bufferData = new Buffer(data,'base64'); 

let buffer = 'data:' + stream.mimeType + ';base64,' + bufferData; 

let img = {

contentType: stream.mimeType,

value: buffer

}

result = await this.ctx.service.content.readBizLicense(img)

上传小于2M大于1M的图片时报错：content out of size limit，上传小于1M 的图片时报错：media data missing hint

试了一天了，不知道该怎么解决？求大神帮助！谢谢！