微信小程序 支付功能开发错误总结

网络编程 发布日期:2024/11/6 浏览次数:1

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微信小程序 支付功能开发错误总结

微信小程序支付终于踩完坑了,发现里面坑挺大的,现在发个贴,希望以后入坑的同学可以看一下 :

https://pay.weixin.qq.com/wiki/doc/api/wxa/wxa_api.php"color: #ff0000">{"errcode":40013,"errmsg":"invalid appid, hints: [ req_id: iil1ba0504ns86 ]"}错误

 onLoad: function () {
  var that = this
  wx.login({
   success: function (res) {
    if (res.code) {
     //发起网络请求
     wx.request({
      url: 'https://api.weixin.qq.com/sns/jscode2session"POST",
      success: function (res) {
       that.setData({
        openid: res.data.openid
       })
      }
     })
    } else {
     console.log('获取用户登录态失败!' + res.errMsg)
    }
   }
  });
 }

第二个坑,支付统一下单接口,签名这个坑是比较多人遇到问题的这个是MD5加密经常和签名工具里面的加密签名不一样

签名加密工具地址:https://pay.weixin.qq.com/wiki/doc/api/jsapi.php"utf-8"));

 // 统一下单接口获取sign(签名)
 paysignjsapi: function (appid, attach, body, mch_id, nonce_str, notify_url, openid, out_trade_no, spbill_create_ip, total_fee, trade_type, key) {
  var self = this;
  //加密签名
  wx.request({
   url: 'http://localhost:8080/XinXingWXApi/wxXcxApi/Md5Encrypt.do',
   method: 'GET',
   data: {
    appid: appid,
    attach: attach,
    body: body,
    mch_id: mch_id,
    nonce_str: nonce_str,
    notify_url: notify_url,
    openid: openid,
    out_trade_no: out_trade_no,
    spbill_create_ip: spbill_create_ip,
    total_fee: total_fee,
    trade_type: trade_type,
    key: key
   },
   //统一下单
   success: function (res) {
    var sign = res.data.strMd5
    var formData = "<xml>"
    formData += "<appid>" + appid + "</appid>" //appid 
    formData += "<attach>" + attach + "</attach>" //附加数据 
    formData += "<body>" + body + "</body>"    //标题
    formData += "<mch_id>" + mch_id + "</mch_id>" //商户号 
    formData += "<nonce_str>" + nonce_str + "</nonce_str>" //随机字符串,不长于32位。 
    formData += "<notify_url>" + notify_url + "</notify_url>" //异步接收微信支付结果通知的回调地址
    formData += "<openid>" + openid + "</openid>"  //用户Id
    formData += "<out_trade_no>" + out_trade_no + "</out_trade_no>" //商户订单号
    formData += "<spbill_create_ip>" + spbill_create_ip + "</spbill_create_ip>"
    formData += "<total_fee>" + total_fee + "</total_fee>" //金额
    formData += "<trade_type>" + trade_type + "</trade_type>"  //公共号支付
    formData += "<sign>" + sign + "</sign>"//签名
    formData += "</xml>"

返回数据解析xml

 //请求统一下单接口
    wx.request({
     url: "https://api.mch.weixin.qq.com/pay/unifiedorder",
     method: 'POST',
     data: formData,
     success: function (data) {
      wx.request({
       url: "http://localhost:8080/XinXingWXApi/wxXcxApi/xmlAnalyze.do" + data.data,
       method: 'POST',
       success: function (res) {
        var pk = 'prepay_id=' + res.data.prepayId;
        var timeStamp = self.createTimeStamp();
        //获取支付签名,并支付
        self.getsignType(appid, timeStamp, nonce_str, pk, "MD5", key);
       }
      })
     }
    })
   }
  });
 }

第三就是调用支付了,这里也有几个小坑,第一就是appId很多写成appid就不行了,第二个就是preoatid 的参数格式要写对prepay_id=wx2017011711060194dccf725232155886323 第三个就是调用支付的时候报支付签名错误,也需要到签名接口查看签名是否一致,查看参数是否是对的,调用微信支付的时候必须加上appId

getsignType: function (appid, timeStamp, nonce_str, pk, signType, key) {
  var that = this;
  wx.request({
   url: "http://localhost:8080/XinXingWXApi/wxXcxApi/getSignType.hn",
   method: 'GET',
   data: {
    appId: appid,
    timeStamp: timeStamp,
    nonceStr: nonce_str,
    pk: pk,
    signType: signType,
    key: key
   },
   success: function (res) {
    console.log(res.data.paySign)
    var paySign = res.data.paySign
    //调用微信支付
    wx.requestPayment({
     'appId': appid,
     'timeStamp': timeStamp,
     'nonceStr': nonce_str,
     'package': pk,
     'signType': 'MD5',
     'paySign': paySign,
     'success': function (res) {
      console.log(res);
      console.log('success');
     },
     'fail': function (res) {
      console.log(res);
      console.log('fail');
     },
     'complete': function (res) {
      // console.log(res);
      console.log('complete');
     }
    });
   }
  })
 }

感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!