app.js

const Koa = require('koa');
const app = new Koa();
const router = require('koa-router')();
const views = require('koa-views');
const co = require('co');
const convert = require('koa-convert');
const json = require('koa-json');
const onerror = require('koa-onerror');
const bodyparser = require('koa-bodyparser')();
const logger = require('koa-logger');

const index = require('./routes/index');
const users = require('./routes/users');
const api = require('./routes/api');
const response_formatter = require('./middlewares/response_formatter');
const request_proxy = require('./middlewares/request_proxy');
// middlewares
app.use(convert(bodyparser));
app.use(convert(json()));
app.use(convert(logger()));
app.use(require('koa-static')(__dirname + '/public'));

app.use(views(__dirname + '/views', {
  extension: 'jade'
}));
//log工具
const logUtil = require('./utils/log_util');
// logger
app.use(async (ctx, next) => {
  //响应开始时间
  const start = new Date();
  //响应间隔时间
  var ms;
  try {
    //开始进入到下一个中间件
    await next();
    ms = new Date() - start;
    //记录响应日志
    logUtil.logResponse(ctx, ms);

  } catch (error) {
    ms = new Date() - start;
    //记录异常日志
    logUtil.logError(ctx, error, ms);
  }
});
// 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`);
});
//添加格式化处理响应结果的中间件，在添加路由之前调用
//仅对/api开头的url进行格式化处理
app.use(response_formatter('^/api'));
//request 代理
app.use(request_proxy('^/rs-server-api/v1/'));
router.use('/', index.routes(), index.allowedMethods());
router.use('/users', users.routes(), users.allowedMethods());
router.use('/api', api.routes(), api.allowedMethods());

app.use(router.routes(), router.allowedMethods());
// response

app.on('error', function (err, ctx) {
  console.log(err)
  logger.error('server error', err, ctx);
});


module.exports = app;