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-logs-middleware');
const session = require('koa-session-minimal');
const MysqlStore = require('koa-mysql-session');
const config = require('./config');

const routers = require('./routes/index');

// 错误处理
onerror(app);


// session存储配置
const sessionMysqlConfig= {
    user: config.database.USERNAME,
    password: config.database.PASSWORD,
    database: config.database.DATABASE,
    host: config.database.HOST,
};

// 配置session中间件
app.use(session({
    key: 'USER_SID',
    store: new MysqlStore(sessionMysqlConfig)
}));

// 解析requestBody中间件
app.use(bodyparser({
    enableTypes: ['json', 'form', 'text']
}));
app.use(json());

// 加载日志
app.use(logger({
    defaultPath: path.resolve(__dirname, 'logs'),
    applicationName: 'app'
}));

app.use(require('koa-static')(__dirname + '/views'));

app.use(views(__dirname + '/views', {
    extension: 'html'
}));

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

// 初始化路由中间件
app.use(routers.routes()).use(routers.allowedMethods());

// 错误处理
app.on('error', (err, ctx) => {
    console.error('server error', err, ctx)
});

module.exports = app;