泊头哪给做网站的好网络营销的四大基础理论

// http对象为wx.request()的二次封装
import http from "../utils";
​
// 向后端发请请求
const res = await http.post("/payment/order", {body: "腾讯QQ-购买会员", // 商品描述total_fee: 998, // 总金额，单位为分
});
if (res.status === 200) {try {// 得到接口返回的数据，向微信发起支付const result = await wx.requestPayment({...res.data,});wx.showToast({title: "支付成功",});console.log("支付结果：", result);} catch (err) {wx.showToast({title: "支付失败",});}
}

  async order(ctx) {// egg框架写法const { service, request } = ctx;// 获取前端传入参数const { userid, total_fee, body } = request.body;// 引入微信配置参数（上面准备工作中保存的config/wx.js文件，包含小程序id，密钥，商户id，商户密钥）const { config } = require("../../config/wx");// 生成订单号（保证唯一性：我采用时间戳拼6位随机数的方式）const tradeNo = Date.now() + '' + randomCode(100000, 999999);// 统一下单签名参数const orderParams = {appid: config.appid, // 小程序idmch_id: config.mch_id, // 商户idnonce_str: service.wx.randomStr(), // 自定义生成随机字符方法sign_type: "MD5", // 加密类型body, // 商品简单描述，有格式要求out_trade_no: tradeNo, // 订单号total_fee, // 单位：分spbill_create_ip: "121.34.253.98", // 服务器ipnotify_url: "https://你的服务器域名/payment/wxnotify", // 支付成功通知地址trade_type: "JSAPI", // 支付方式（小程序支付选JSAPI）openid: user.openid, // 用户openid，步骤0保存的数据};// 签名：对上面所有参数加密（签名算法请查看接口文档，下同）const orderSign = service.wx.sign(orderParams);// json->xmlconst xmlData = convert.js2xml({ xml: { ...orderParams, sign: orderSign } },{ compact: true });// 调用统一下单接口（接口没说明，但必须为post请求）const { data } = await ctx.curl("https://api.mch.weixin.qq.com/pay/unifiedorder",{method: "post",data: xmlData,});// xml->jsconst result = convert.xml2js(data, { compact: true });if (result.prepay_id) {// 此处可以把订单信息保存到数据库// 返回prepay_id后，接着就是把参数返回前端// =>为了更清晰，我把这里的代码写在下一步// ...}}

    // 支付签名参数const payParams = {appId: config.appid, // 商户 idtimeStamp: Date.now(), // 时间戳nonceStr: this.randomStr(), // 随机字符package: "prepay_id=" + result.prepay_id, //预支付会话标识（格式为：prepay_id=统一下单接口返回数据）signType: "MD5", //签名类型（必须与上面的统一下单接口一致）};// 签名const paySign = service.wx.sign(payParams);
​// 把参数+签名返回给前端ctx.body = formatData({data: {timeStamp: payParams.timeStamp,nonceStr: payParams.nonceStr,package: payParams.package,signType: payParams.signType,paySign,},});

    "use strict";const { Service } = require("egg");const crypto = require("crypto");// 微信基本配置const { weapp } = require("../../config/wx");class wxService extends Service {randomStr(len = 24) {const str ="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";let result = "";for (let i = 0; i < len; i++) {result += str[Math.floor(Math.random() * str.length)];}return result;}sign(data, signType = "MD5") {const keys = [];for (const key in data) {if (data[key] !== undefined) {keys.push(key);}}// 字典排序=>key=valueconst stringA = keys.sort().map((key) => `${key}=${decodeURIComponent(data[key])}`).join("&");// 拼接商户keyconst stringSignTemp = stringA + "&key=" + weapp.mch_key;console.log("stringSignTemp", stringSignTemp);// 加密let hash;if (signType === "MD5") {hash = crypto.createHash("md5");} else {hash = crypto.createHmac("sha256", "laoxie");}hash.update(stringSignTemp);const paySign = hash.digest("hex").toUpperCase();return paySign;}}module.exports = wxService;

  "use strict";
​const Controller = require("egg").Controller;const getRawBody = require("raw-body");const contentType = require("content-type");const { formatData, randomCode, params, formatParams } = require("../utils");
​class PaymentController extends Controller {// 微信支付回调地址async notify(ctx) {const { req } = ctx;
​// 微信调用该接口时传入的数据为xml,所以先转换const data = await getRawBody(req, {length: req.headers["content-length"],limit: "1mb",encoding: contentType.parse(req).parameters.charset,});const result = params.xml2js(data);
​// 验签：微信传入的除sign外的所有数据进行签名，拒后与sign进行对比是否一致// 一致说明支付成功，否则支付失败// 并根据不同的结果通知微信服务器（响应不同的xml数据，如下）const resultSign = result.sign;delete result.sign;const mySign = ctx.service.wx.sign(result);console.log("sign:", resultSign, mySign);
​ctx.set("content-type", "text/plain");
​if (resultSign === mySign) {// 修改商户订单状态const {device_info,openid,trade_type,bank_type,total_fee,settlement_total_fee,fee_type,transaction_id,time_end,attach,} = result;
​// 格式化自定义参数let myattach = {};if (attach) {myattach = params.parse(attach);}
​// 格式化支付时间：20200423161017=>2020/04/23 16:10:17let pay_time = time_end.replace(/(d{4})(d{2})(d{2})(d{2})(d{2})(d{2})/,"$1/$2/$3 $4:$5:$6");pay_time = new Date(pay_time);
​// 根据订单号更新数据库中的订单状态const newData = {device_info,openid,trade_type,bank_type,total_fee,settlement_total_fee,fee_type,transaction_id,pay_time,status: 1,...myattach,};db.update("purchase",{out_trade_no: result.out_trade_no,},{$set: newData,});
​ctx.body = `<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>`;} else {ctx.body = `<xml><return_code><![CDATA[FAIL]]></return_code><return_msg><![CDATA[ERROR]]></return_msg></xml>`;}}}
​module.exports = PaymentController;

  const params = {parse(queryString) {// 'a=1&b=2' => {a:1,b:2}return queryString.split("&").reduce((res, item) => {const arr = item.split("=");res[arr[0]] = arr[1];return res;}, {});},js2xml(data) {return convert.js2xml({ xml: data }, { compact: true });},xml2js(xml) {const result = convert.xml2js(xml, {compact: true,textKey: "value",cdataKey: "value",}).xml;const data = {};for (const key in result) {data[key] = result[key].value;}return data;},};module.exports = {params}