feat: wechat pay (#30)

* feat: 配置 dockerfile

* feat: wechat pay

docs/nest/index.md

@@ -4,4 +4,9 @@
 
 # 拓展
 
-💄 目前额外拓展了 ali-oss，alipay 的内容
+目前额外拓展的内容如下：
+
+- 💄 [ali-oss](https://thinkasany.github.io/docs/#/docs/nest/24/24?id=ali-oss)
+- 💄 [ali-pay](https://thinkasany.github.io/docs/#/docs/nest/pay/1)
+- 💄 [wechat-pay](https://thinkasany.github.io/docs/#/docs/nest/pay/wechat)
+- 💄 [wechat-pay](https://thinkasany.github.io/docs/#/docs/nest/sso/1)

docs/nest/pay/wechat.md

@@ -0,0 +1,119 @@
+[源码](https://github.com/thinkasany/nestjs-course-code/tree/master/%E6%94%AF%E4%BB%98/node-wechat/server)
+
+# 实现效果
+
+<img src="/docs/nest/pay/images/2.jpeg" style="width: 200px; height: 300px;" />
+
+# core
+
+github： https://github.com/yjiewei/payment-demo 感谢大哥的仓库和尚硅谷提供的账号
+
+主要用的是微信 v3 的支付，总所周知，最头疼的问题就是商家账号的事情了这边为大家提供了 pem 和 商户账号信息，不知道啥时候回过期，反正留下了截图也了解了总体的过程就好了。
+
+接口请求发送成功返回的url，在微信打开就是上面的实现效果
+
+```
+weixin://wxpay/bizpayurl?pr=dDeABFRzz
+```
+
+# 核心配置
+
+```
+const order = {
+  appid: "wx74862e0dfcf69954", // appid
+  mchid: "1558950191", // 商户号
+  description: "测试支付",
+  out_trade_no: "wzm20210209111",
+  amount: {
+    total: 1
+  },
+  notify_url: "https://xxx.cn/"
+};
+v3Pay(order, "34345964330B66427E0D3D28826C4993C77E631F"); // 证书编号，在商户后台申请证书后会有编号
+```
+
+# 代码
+
+```
+import express from "express";
+const app = new express();
+import axios from "axios";
+import { readFileSync } from "fs";
+import { createSign as _createSign } from "crypto";
+
+/**
+ * 生成随机字符串
+ * @param {number} len 字符串长度
+ */
+function createRandomString(len) {
+  const data = "ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678";
+  let str = "";
+  for (let i = 0; i < len; i++) {
+    str += data.charAt(Math.floor(Math.random() * data.length));
+  }
+  return str;
+}
+
+/**
+ * 微信支付v3 签名生成
+ * @param {string} method 请求方法
+ * @param {string} url
+ * @param {number} timestamp 时间戳 秒级
+ * @param {string} nonce_str 随机字符串
+ * @param {Object} order 主体信息
+ */
+function createSign(method, url, timestamp, nonce_str, order) {
+  const signStr = `${method}\n${url}\n${timestamp}\n${nonce_str}\n${JSON.stringify(order)}\n`;
+  const cert = readFileSync("./apiclient_key.pem", "utf-8");
+  const sign = _createSign("RSA-SHA256");
+  sign.update(signStr);
+  return sign.sign(cert, "base64");
+}
+
+/**
+ * 微信支付v3
+ * @param {Object} order 订单信息
+ */
+function v3Pay(order, serial_no) {
+  const timestamp = Math.floor(new Date().getTime() / 1000);
+  const nonce_str = createRandomString(32);
+  const signature = createSign(
+    "POST",
+    "/v3/pay/transactions/native",
+    timestamp,
+    nonce_str,
+    order
+  );
+  const Authorization = `WECHATPAY2-SHA256-RSA2048 mchid="${order.mchid}",nonce_str="${nonce_str}",timestamp="${timestamp}",signature="${signature}",serial_no="${serial_no}"`;
+  console.log(Authorization);
+  axios
+    .post("https://api.mch.weixin.qq.com/v3/pay/transactions/native", order, {
+      headers: { Authorization }
+    })
+    .then(res => {
+      console.log(res);
+    })
+    .catch(err => {
+      console.log(err);
+    });
+}
+
+/**
+ * github： https://github.com/yjiewei/payment-demo 感谢大哥的仓库和尚硅谷提供的账号
+ */
+const order = {
+  appid: "wx74862e0dfcf69954", // appid
+  mchid: "1558950191", // 商户号
+  description: "测试支付",
+  out_trade_no: "wzm20210209111",
+  amount: {
+    total: 1
+  },
+  notify_url: "https://xxx.cn/"
+};
+v3Pay(order, "34345964330B66427E0D3D28826C4993C77E631F"); // 证书编号，在商户后台申请证书后会有编号
+
+app.listen(3000);
+```
+
+<!--  -->

docs/summary.md

@@ -1,5 +1,8 @@
 - Nest 通关秘籍
   - [前言](/docs/nest/index.md)
+  - [pay-alipay-sendbox](/docs/nest/pay/1.md)
+  - [pay-wechat](/docs/nest/pay/wechat.md)
+  - [sso-单点登录](/docs/nest/sso/1.md)
   - [5.IOC 解决了什么痛点问题？](/docs/nest/5/5.md)
   - [7.使用多种 Provider，灵活注入对象](/docs/nest/7/1.md)
   - [9.AOP 架构有什么好处？🔥](/docs/nest/9/1.md)
@@ -23,6 +26,4 @@
   - [54.MySQL + TypeORM + JWT 实现登录注册](/docs/nest/54/54.md)
   - [55.基于 ACL 实现权限控制](/docs/nest/55/55.md)
   - [56.基于 RBAC 实现权限控制](/docs/nest/56/56.md)
-  - [pay](/docs/nest/pay/1.md)
-  - [sso](/docs/nest/sso/1.md)
   - [todo...](/docs/typeorm/1.md)