AdonisJs后端服务对接外部接口BA认证之node JS实现

AdonisJs后端服务对接外部接口BA认证之node JS实现

官方对接的文档只有JAVA、php、python的实现案例，并没有js的实现版本，后面经过不断的摸索及测试验证，成功对接通过，现把相关的代码共享一下，有需要的同学可以参与，大家有更好的方法也可以给我留言，期待共同进步~

生成签名方法实现

/**
 * 生成签名
 * @param {String} data 待加密字符串
 * @param {String} key 公共秘钥
 */
const genSign = (data,key) => {
    
    
  // 第一个参数为加密字符串，第二个参数为公共秘钥
  var hash = CryptoJS.HmacSHA1(data, key);
  var base64 = CryptoJS.enc.Base64.stringify(hash);
  return base64.toString();
}

验证签名方法实现

/**
 * 验证签名
 * @param {Object} request 请求
 * @param {Object} response 响应
 */
const checkSign = ({
     
     request, response}) => {
    
    
  let clientId = Env.get('CLIENTID');
  let clientSecret = Env.get('CLIENTSECRET');
  let date = request.headers.date;
  let authorization = request.headers.authorization;
  let stringToSign = request.method + " " + request.url + "\n" + date;
  //console.log(stringToSign);

  if (!authorization || !date) {
    
    
    return false;
  }

  const currSign = genSign(stringToSign,clientSecret);
  let checkAuth = "MWS " + clientId + ":" + currSign;
  //console.log(checkAuth);

  return checkAuth == authorization;
}

因对方订单号orderId入参是int19位，直接使用JSON.parse会造成精度丢失，17位之后的数字变成0，可以引入以下代码解决

import JSONbig from 'json-bigint'
console.log(JSONbig.parse(str));

返参的orderId也要是int19位并且是json字串，一开始使用JSONbig.stringify处理后，orderId并没有在json字串中显示，后面将orderId的值转成字串符，转成json字串后，再处理字符串，将orderId值两头的’'去掉，问题得到解决。

请求接口的JS代码实现:

/**
 * 发送请求到对方接口
 * @param {Object} dataJSON 提交的JSON数据
 */
const request = async (dataJSON) => {
    
    
  try {
    
    
    let partnerId = Env.get('PARTNERID');
    let clientId = Env.get('CLIENTID');
    let clientSecret = Env.get('CLIENTSECRET');
    let noticeUrl = Env.get('CONSUME_NOTICE');//请求地址

    //格式化签名日期(Wed, 02 Nov 2022 00:49:01 GMT)
    let curDateStr = moment(new Date()).subtract(8,'hours').toString();
    let tmStr = curDateStr.substring(0,curDateStr.indexOf('+'));
    tmStr = tmStr.split(' ');
    let sortDateStr = tmStr[0] + ', '+ tmStr[2] + ' ' + tmStr[1] + ' ' + tmStr[3] + ' ' + tmStr[4] + ' ' + tmStr[5];
    //格式化验签请求地址
    let signUrl = noticeUrl.substring(noticeUrl.indexOf('com/')+3);
    let stringToSign = "POST "+signUrl+"\n" + sortDateStr;
    console.log('Meituan stringToSign:', stringToSign);
    const currSign = genSign(stringToSign,clientSecret);
    let auth = "MWS " + clientId + ":" + currSign;

    // 设置请求头数据
    const config = {
    
    
      url: signUrl,
      method: 'POST',
      headers: {
    
    
        'PartnerId': partnerId,
        'Authorization': auth,
        'Date': sortDateStr,
        'Content-Type': 'application/json;charset=UTF-8'
      },
    };
	
	//去掉orderId值两头的单引号.
    let reqStr = dealResponseOrderId(JSON.stringify(dataJSON));
    console.log('reqStr:', reqStr);
    const response = await Axios.post(noticeUrl, reqStr,config);
    const data = response.data;
    console.log(response.data);

    if (data.code == 200) {
    
    
      return {
    
    
        success: true,
        data: data,
      };
    } else {
    
    
      return {
    
    
        success: false,
        message: data.describe
      }
    }
  } catch (error) {
    
    
    console.error(error);
    return {
    
    
      success: false
    }
  }
}

去掉返回值两边的单引号，写法有点粗糙，不喜勿喷~

/**
 * 处理返回orderId（去掉返回值左右两边的字符串标识""）.
 * @param {Object} obj 
 */
 const dealResponseOrderId = (responseStr) => {
    
    
  if (responseStr.indexOf('"orderId"') == -1) {
    
    
    return responseStr;
  }
  let tmpStrs = responseStr.split('"orderId":"');
  let resultStr = tmpStrs[1].substring(0,tmpStrs[1].indexOf('"'));
  let result = tmpStrs[0]+'"orderId":'+resultStr+tmpStrs[1].substring(resultStr.length+1);
	return result;
}