app.js

/**
 gaoqi-blog app.js
 */

'use strict';

const config = require('./config');
const path = require('path');
const Loader = require('loader');
const LoaderConnect = require('loader-connect');
const express = require('express');
const session = require('express-session');
const errorhandler = require('errorhandler');
const RedisStore = require('connect-redis')(session);
const redisClient = require('./common/redis.js');
const passport = require('passport');
require('./models');
const auth = require('./middleware/auth');
const online = require('./middleware/online');
const GitHubStrategy = require('passport-github').Strategy;
const cookieParser = require('cookie-parser');
const bodyParser = require('body-parser');
const compress = require('compression');
const busboy = require('connect-busboy');
const _ = require('lodash');
const csurf = require('csurf');
const cors = require('cors');
const render = require('./common/render');
const cutter = require('./common/cutter');
const responseTimeMiddleware = require('./middleware/statsd').responseTime;

const webRouter = require('./web_router');
const webApi = require('./web_api');

const app = express();

// 静态文件目录
const staticDir = path.join(__dirname, 'public');
let assets = {};
if (process.env.NODE_ENV === 'production') {
  try {
    assets = require('./assets.json');
  } catch (e) {
    console.log('You must execute `make build` before start app when mini_assets is true.');
    throw e;
  }
}

app.disable('x-powered-by');

app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'html');
app.engine('html', require('ejs-mate'));
app.locals._layoutFile = 'layout.html';

app.use(require('./middleware/wrap').render);
app.use(require('./middleware/wrap').send);
app.use(require('response-time')());
app.use(bodyParser.json({ limit: '1mb' }));
app.use(bodyParser.urlencoded({ extended: true, limit: '1mb' }));
app.use(require('method-override')());
app.use(cookieParser(config.session_secret));
app.use(compress());
app.use(session({
  secret: config.session_secret,
  store: new RedisStore({
    client: redisClient,
    port: config.redis_port,
    host: config.redis_host
  }),
  resave: true,
  saveUninitialized: true
}));
app.use(passport.initialize());

// custom middleware 过滤未登陆
app.use(auth.authUser);
// 缓存已登录用户标识在线
app.use(online.cacheOnline);

// 静态资源
if (config.debug) {
  app.use(LoaderConnect.less(__dirname)); // 测试环境用，编译 .less on the fly
}
app.use('/public', express.static(staticDir));

if (!config.debug) {
  app.use(function (req, res, next) {
    if (req.path.indexOf('/api') === -1) {
      csurf()(req, res, next);
      return;
    }
    next();
  });
  app.set('view cache', true);
}

// github oauth
passport.serializeUser(function (user, done) {
  done(null, user);
});
passport.deserializeUser(function (user, done) {
  done(null, user);
});
passport.use(new GitHubStrategy(config.GITHUB_OAUTH, function (accessToken, refreshToken, profile, done) {
  done(null, profile);
}));

// set static, dynamic helpers
_.extend(app.locals, {
  config,
  Loader,
  assets
});
_.extend(app.locals, render);
_.extend(app.locals, cutter);

app.use(function (req, res, next) {
  res.locals.csrf = req.csrfToken ? req.csrfToken() : '';
  next();
});

app.use(busboy({
  limits: {
    fileSize: 10 * 1024 * 1024 // 10MB
  }
}));

app.use(responseTimeMiddleware({
  host: '121.40.129.45',
  requestKey: 'gaoqi_blog'
}));

app.use('/', webRouter);
app.use('/api', cors(), webApi);

// error handler
if (config.debug) {
  app.use(errorhandler());
} else {
  app.use(function (err, req, res) {
    console.log(err);
    return res.status(500).send('500 status');
  });
}

app.listen(process.env.PORT || config.port, function () {
  console.log('GaoqiBlog listening on port %s in %s mode', process.env.PORT || config.port, app.settings.env);
});

module.exports = app;