app.js

const Koa = require("koa");
const app = new Koa();
// const views = require('koa-views')
const json = require("koa-json");
// const onerror = require('koa-onerror')
const bodyparser = require("koa-bodyparser");
const logger = require("koa-logger");

// const noauth = require("./routes/noAuth");
const api = require("./routes/api");

// const jwt = require("koa-jwt");
// const config = require("./config/index");
// error handler
// onerror(app)

// // Custom 401 handling if you don't want to expose koa-jwt errors to users
// app.use(function(ctx, next) {
//   return next().catch(err => {
//     if (401 == err.status) {
//       ctx.status = 401
//       ctx.body = 'Protected resource, use Authorization header to get access\n'
//     } else {
//       throw err
//     }
//   })
// })

// 解决跨域和options请求问题，集中处理错误
const handler = async (ctx, next) => {
  // log request URL:
  ctx.set("Access-Control-Allow-Origin", "*");
  ctx.set(
    "Access-Control-Allow-Methods",
    "POST, GET, OPTIONS, PATCH, HEAD, PUT, DELETE"
  );
  ctx.set("Access-Control-Max-Age", "3600");
  ctx.set(
    "Access-Control-Allow-Headers",
    "x-requested-with,Authorization,Content-Type,Accept"
  );
  ctx.set("Access-Control-Allow-Credentials", "true");
  if (ctx.request.method == "OPTIONS") {
    ctx.response.status = 200;
  } else {
    console.log(`Process ${ctx.request.method} ${ctx.request.url}`);
    try {
      await next();
      console.log("handler通过");
    } catch (err) {
      console.log("handler处理错误");
      console.log(err);
      ctx.response.status = err.statusCode || err.status || 500;
      ctx.response.body = {
        message: err.message,
      };
    }
  }
};

// middlewares
app.use(
  bodyparser({
    enableTypes: ["json", "form", "text"],
  })
);
app.use(json());
app.use(logger());
app.use(require("koa-static")(__dirname + "/front"));
// app.use(
//   views(__dirname + '/views', {
//     extension: 'pug'
//   })
// )
app.use(handler);

// logger
app.use(async (ctx, next) => {
  const start = new Date();
  await next();
  const ms = new Date() - start;
  console.log(`${ctx.method} ${ctx.url} - ${ms}ms`);
});

// app.use(
//   jwt({ secret: config.jwtsecret }).unless({
//     path: [/^\/noauth/, /^\/api\/lianyue/]
//     // path: [/^\/public/, /^\/uploads/, /^\/noauth/]
//   })
// );

// routes
// app.use(noauth.routes(), noauth.allowedMethods());
app.use(api.routes(), api.allowedMethods());

// // error-handling
// app.on('error', (err, ctx) => {
//   console.error('server error', err, ctx)
// })

module.exports = app;