const koa = require("koa");
const sha1 = require("sha1"); // 加密
const cors = require("koa2-cors");
const { wechat } = require("./config");

const app = new koa();

app.use(cors());

app.use(async (ctx, next) => {
  const token = wechat.token;
  const signature = ctx.query.signature;
  const nonce = ctx.query.nonce;
  const timestamp = ctx.query.timestamp;
  const echostr = ctx.query.echostr;
  let str = [token, timestamp, nonce].sort().join("");
  let sha = sha1(str);
  if (sha == signature) {
    ctx.body = echostr;
  } else {
    ctx.body = "wrong";
  }
});

server.listen(8080, () => {
  // /sbin/iptables -I INPUT -p tcp --dport 8080 -j ACCEPT 在服务器运行时需要执行这段命令让服务器开启这个端口
  console.log("server is running on port 8080!");
});