app.js

require('dotenv').config();
const bodyParser = require('body-parser');
var createError = require('http-errors');
var express = require('express');
const ALLOWED_IPS = ['127.0.0.1', '192.168.1.100'];
const ALLOWED_DOMAINS = ['example.com', 'subdomain.example.com'];
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var apisRouter = require('./routes/apis');
var app = express();
// 处理application/json内容格式的请求体
app.use(bodyParser.json());
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(function(req, res, next) {
  res.header('Access-Control-Allow-Origin', 'http://localhost:8081');
  res.header('Access-Control-Allow-Credentials', true);
  res.header('Access-Control-Allow-Headers', 'Content-Type');
  res.header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
  next();
});
app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/api/v1', apisRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;