如何再微信云函数中使用腾讯云的接口？(身份证卡证识别)
发布于 4 年前 作者 wengang 5494 次浏览 来自 问答

场景：用户上传身份证照片后，把照片保存再云存储，然后通过cloud.getTempFileURL换出这个照片的临时url，把这个url通过云函数传递给腾讯云接口并且得到返回的结果。

已知：通过腾讯云的 API Explorer 得到node环境中请求的代码（附上API Explorer链接：https://console.cloud.tencent.com/api/explorer?Product=ocr&Version=2018-11-19&Action=IDCardOCR&SignVersion=

代码如下：（腾讯云ID和密钥，以及图片url没有写入，替换进去即可）（我已经再node环境中使用过以下代码可以得到满意的结果）

问题：如何把这个代码迁移到微信云函数里去？？

const tencentcloud = require("../../../../tencentcloud-sdk-nodejs");

const OcrClient = tencentcloud.ocr.v20181119.Client;
const models = tencentcloud.ocr.v20181119.Models;

const Credential = tencentcloud.common.Credential;
const ClientProfile = tencentcloud.common.ClientProfile;
const HttpProfile = tencentcloud.common.HttpProfile;

let cred = new Credential("腾讯云ID", "腾讯云密钥");
let httpProfile = new HttpProfile();
httpProfile.endpoint = "ocr.tencentcloudapi.com";
let clientProfile = new ClientProfile();
clientProfile.httpProfile = httpProfile;
let client = new OcrClient(cred, "ap-guangzhou", clientProfile);

let req = new models.IDCardOCRRequest();

let params = '{"ImageUrl":"这里写入图片URL连接","CardSide":"FRONT"}'
req.from_json_string(params);

client.IDCardOCR(req, function(errMsg, response) {

    if (errMsg) {
        console.log(errMsg);
        return;
    }

    console.log(response.to_json_string());
});

云函数

// 云函数入口文件
const cloud = require('wx-server-sdk')
cloud.init()

// 
exports.main = async (event, context) => {
 
}
2 回复

已解决

解决代码如下：

关键在于把client.IDcardOCR函数包装成一个promise对象返回，不然得不到返回值，也可以使用async/await。

// 云函数入口文件
const cloud = require('wx-server-sdk')
cloud.init()
// 导入腾讯云密钥配置文件
const {
  TENCENTCLOUD_APPID,
  TENCENTCLOUD_SECRETID,
  TENCENTCLOUD_SECRETKEY,
} = require('./config.js')

//  
const tencentcloud = require("tencentcloud-sdk-nodejs");
const OcrClient = tencentcloud.ocr.v20181119.Client;
const models = tencentcloud.ocr.v20181119.Models;
const Credential = tencentcloud.common.Credential;
const ClientProfile = tencentcloud.common.ClientProfile;
const HttpProfile = tencentcloud.common.HttpProfile;

// 设置腾讯云密钥
let cred = new Credential(TENCENTCLOUD_SECRETID,TENCENTCLOUD_SECRETKEY);

let httpProfile = new HttpProfile();
httpProfile.endpoint = "ocr.tencentcloudapi.com";
let clientProfile = new ClientProfile();
clientProfile.httpProfile = httpProfile;
let client = new OcrClient(cred, "ap-guangzhou", clientProfile);
let req = new models.IDCardOCRRequest();

// 云函数入口函数
exports.main = async (event, context) => {
  // 传入参数url
  let params = `{"ImageUrl":"${event.url}","CardSide":"FRONT"}`
  req.from_json_string(params);

  // 需要返回一个Promise对象
  return new Promise((resolve,reject)=>{
    client.IDCardOCR(req, function (errMsg, response) {

      if (errMsg) {
        // console.log(errMsg);
        reject(errMsg)
        return;
      }
      resolve(response.to_json_string())
      // console.log(response.to_json_string());
    });
  })
}

将node的代码按koa2的格式改写，复制到云函数里就行。

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