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app.js
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app.js
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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-logger')
const koaBody = require('koa-body');
app.use(koaBody({
multipart: true,
formidable: {
maxFileSize: 200 * 1024 * 1024 // 设置上传文件大小最大限制,默认2M
}
}));
// 下面以koa2-cors为例,
const cors = require('koa2-cors');
// error handler
onerror(app)
app.use(cors({
exposeHeaders: ['WWW-Authenticate', 'Server-Authorization', 'Date'],
maxAge: 100,
credentials: true,
allowMethods: ['GET', 'POST', 'OPTIONS'],
allowHeaders: ['Content-Type', 'Authorization', 'Accept', 'X-Custom-Header', 'anonymous'],
}));
// middlewares
app.use(bodyparser())
app.use(json())
app.use(logger())
app.use(require('koa-static')(__dirname + '/public'))
app.use(views(__dirname + '/views', {
extension: 'pug'
}))
// 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`)
})
const index = require('./routes/index')
const users = require('./routes/users')
const upload = require('./routes/upload')
app.use(index.routes(), index.allowedMethods())
app.use(users.routes(), users.allowedMethods())
app.use(upload.routes(), upload.allowedMethods())
// error-handling
app.on('error', (err, ctx) => {
console.error('server error', err, ctx)
});
module.exports = app