app.js

'use strict';

const path = require('path');
const koa = require('koa');
const Middles = require('../middleware/');

const config = global.config;
const app = new koa();

// 配置cookie加密的key
app.keys = ['GRACEJS'];

// 响应数据提压缩策略，如：gzip
app.use(Middles.compress());

// 获取结构化请求体数据
app.use(Middles.body());

// 配置静态文件路由
app.use(Middles.static(['/static/**/*', '/*/static/**/*'], {
  dir: config.path.project,
  maxage: config.site.env == 'production' && 60 * 60 * 1000
}));

// 上传下载功能
app.use(Middles.xload(app, config.xload));

// 获取vhosts
const vhosts = Object.keys(config.vhost).map((item) => {
  const vapp = new koa();

  const appName = config.vhost[item];
  const appPath = path.resolve(config.path.project + '/' + appName);

  // session配置，默认存在cookie中
  const sessionConfig = config.session[appName] || {};
  vapp.use(Middles.session(Object.assign({
    key: `GRACE:${appName}`
  }, sessionConfig), vapp));

  // 如果在csrf的module名单里才使用csrf防护功能
  config.csrf.module.indexOf(appName) > -1 && vapp.use(Middles.secure(vapp, {
    throw: true
  }));

  // 在开发环境才使用mock数据功能
  config.site.env == 'development' && vapp.use(Middles.mock(vapp, {
    root: appPath + '/mock/',
    prefix: config.mock.prefix + appName
  }));

  // 如果配置了连接数据库
  config.mongo.api[appName] && vapp.use(Middles.mongo(vapp, {
    root: appPath + '/model/mongo',
    connect: config.mongo.api[appName]
  }));

  // 配置api
  const isFullMock = config.site.env == 'development' && !!config.mock.isFullMock;
  vapp.use(Middles.proxy(vapp, config.api, {
    // proxy 配置
    hosts: config.hosts, // 接口域名hosts配置，可以不配置
    allowShowApi: config.site.env !== 'production',
    isFullMock, // 是否开启mock模式
    mockPath: `${config.mock.localServer}${config.mock.prefix}${appName}`
  }, {
    // request 配置
    timeout: config.proxy.timeout, // 接口超时时间
    keepAlive: config.proxy.keepAlive //设置proxy的keep-alive
  }));

  // 配置模板引擎
  const engine = (typeof config.template === 'string' ? config.template : config.template[appName]);
  vapp.use(Middles.views(vapp, {
    root: appPath + '/views',
    extension: 'html',
    engine: engine || 'swig',
    locals: {
      constant: config.constant
    },
    cache: config.site.env == 'production' && 'memory',
    debug: config.site.env !== 'production'
  }));

  // 配置控制器文件路由
  const prefix = config.router && config.router.prefix && config.router.prefix[appName];
  const suffix = config.router && config.router.suffix && config.router.suffix[appName];
  const errorPath = config.path.default_error && config.path.default_error[appName] || '/error/404';
  vapp.use(Middles.router(vapp, {
    root: appPath + '/controller',
    prefix: prefix,
    suffix: suffix,
    defaultPath: config.path.default_path[appName],
    defaultJump: config.path.default_jump[appName],
    domain: item,
    errorPath: errorPath
  }));

  return {
    host: item,
    app: vapp
  };
});

// 注入vhosts路由
app.use(Middles.vhost(vhosts));

module.exports = app;