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百度排名公司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?chapter=7_4&index=2
业务流程在这里大家看文档的时候可以看到。第一个坑获取用户的openid参数一定要拼在url连接上否则会报{"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?appid=wxaacf22345345cfc7162fe3&secret=83ebd41c3e6f34a49b3a34578063434548ff3f71&js_code=' + res.code + '&grant_type=authorization_code',
method: "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?chapter=20_1
签名加密的时候要转成utf-8,加密我用自己的接口进行加密的 digest.update(data.getBytes("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: ':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: ":8080/XinXingWXApi/wxXcxApi/xmlAnalyze.do?strXml=" + 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);
}
})
}
})
}
});
}