koa-static

Koa static file serving middleware, wrapper for koa-send.

Installation

$ npm install koa-static

API

const Koa = require('koa');
const app = new Koa();
app.use(require('koa-static')(root, opts));

• root root directory string. nothing above this root directory can be served
• opts options object.

Options

router.post('/user/logon',indexController.Logon)
router.post('/user/sendcode',indexController.SendCode)
router.post('/user/login',indexController.Login)

router.post('/car/add',indexController.AddCar)
router.post('/car/delete',indexController.DeleteCar)
router.get('/car/show',indexController.CarShow)
router.put('/car/update',indexController.UpdateCar)

• maxage Browser cache max-age in milliseconds. defaults to 0
• hidden Allow transfer of hidden files. defaults to false
• index Default file name, defaults to 'index.html'
• defer If true, serves after return next(), allowing any downstream middleware to respond first.
• gzip Try to serve the gzipped version of a file automatically when gzip is supported by a client and if the requested file with .gz extension exists. defaults to true.
• br Try to serve the brotli version of a file automatically when brotli is supported by a client and if the requested file with .br extension exists (note, that brotli is only accepted over https). defaults to true.
• setHeaders Function to set custom headers on response.
• extensions Try to match extensions from passed array to search for file when no extension is sufficed in URL. First found is served. (defaults to false)

Example

const query = require('../db/query');
const md5 = require('md5')


const CheckAccount = async(params)=>{
    var sql = ` select * from userinfo where account='${params.account}' or phone='${params.phone}' `
    return await query(sql)
}

const AddUser = async(params)=>{
    var newpassword=md5(params.password)
    var sql =` insert into userinfo (account,password,phone) 
    value('${params.account}','${newpassword}','${params.phone}') `
    return await query(sql)
}


const AddCar = async(params)=>{
    var sql = ` select * from car where shopid='${params.shopid}' and userid='${params.userid}' `
    var cardata = await query(sql)
    if(cardata.length>0){
        var sql2 = ` update car set count=count+${params.count} where shopid='${params.shopid}' and userid='${params.userid}' `
        return await query(sql2)
    }
    var sql3 = ` insert into car (shopid,count,userid) 
    values('${params.shopid}','${params.count}','${params.userid}') `
    return await query(sql3)
}

const DeleteCar = async (params) => {
    var sql = ` delete from car where id in(${params.ids}) `
    return await query(sql)
}

const CarShow = async(params)=>{
    var page = params.page;
    var size = params.size;
    var sql = ` select b.shopname,b.price,a.count,a.count*b.price zpric,a.id from car a
    join shop b on a.shopid=b.id where a.userid='${params.userid}' `
    if(params.shopname){
        sql+=` and b.shopname like '%${params.shopname}%' `
    }
    var zcount = (await query(sql)).length
    sql+=` limit ${(page-1)*size},${size} `
    var cardata = await query(sql)
    return { cardata,zcount }
}

const UpdateCar = async(params)=>{
    console.log(params);
    var sql2 = ` select * from car where id='${params.id}' `
    var cardata = await query(sql2)
    var sql = ` update car set count= `
    if(params.data==true){
        if(cardata[0].count==1){
            return {affectedRows:0}
        }
        sql+=` count-1 `
    }else{
        sql+=` count+1 `
    }
    sql+=` where id=${params.id} `
    return await query(sql)
}

See also

• koajs/conditional-get Conditional GET support for koa
• koajs/compress Compress middleware for koa
• koajs/mount Mount koa-static to a specific path

Options

• maxage Browser cache max-age in milliseconds. defaults to 0
• hidden Allow transfer of hidden files. defaults to false
• index Default file name, defaults to 'index.html'
• defer If true, serves after return next(), allowing any downstream middleware to respond first.
• gzip Try to serve the gzipped version of a file automatically when gzip is supported by a client and if the requested file with .gz extension exists. defaults to true.
• br Try to serve the brotli version of a file automatically when brotli is supported by a client and if the requested file with .br extension exists (note, that brotli is only accepted over https). defaults to true.
• setHeaders Function to set custom headers on response.
• extensions Try to match extensions from passed array to search for file when no extension is sufficed in URL. First found is served. (defaults to false)

Example

const indexService = require('../service/index');
const redis = require('../extend/redis')
const jwt=require('../extend/help')
const xlsx = require('node-xlsx')

const Logon = async(ctx)=>{
    var res1 = await indexService.CheckAccount(ctx.request.body)
    if(res1.length>0){
        return ctx.body={
            code:403,
            message:''
        }
    }
    var res2 = await indexService.AddUser(ctx.request.body)
    if(res2.affectedRows>0){
        return ctx.body={
            code:200,
            message:''
        }
    }else{
        return ctx.body={
            code:403,
            message:''
        }
    }
}


const SendCode = async(ctx)=>{
    var phone=ctx.request.body.phone;
    if(!phone){
        return ctx.body={
            code:403,
            message:''
        }
    }
    var checkphone=/^1[3-9]\d{9}$/
    if(!checkphone.test(phone)){
        return ctx.body={
            code:403,
            message:''
        }
    }
    var res1 = await indexService.CheckAccount(ctx.request.body)
    if(res1.length==0){
        return ctx.body={
            code:403,
            message:''
        }
    }
    var rediscode = await redis.get(phone)
    if(rediscode == null){
        var code = Math.random().toFixed(6).slice(-6)
        await redis.setex(phone,60,code);
        return ctx.body={
            code:200,
            message:'',
            data:code
        }
    }else{
        return ctx.body={
            code:403,
            message:''
        }
    }
}

const Login = async (ctx) => {
    var res1 = await indexService.CheckAccount(ctx.request.body)
    if (res1.length == 0) {
        return ctx.body = {
            code: 403,
            message: ""
        }
    }
    var rediscode = await redis.get(ctx.request.body.phone)
    if (rediscode == ctx.request.body.code) {
        var token = await jwt.signtoken(res1[0])
        return ctx.body = {
            code: 200,
            message: "",
            data: 'Bearer ' + token
        }
    } else {
        return ctx.body = {
            code: 403,
            message: ""
        }
    }
}


const AddCar=async(ctx)=>{
    ctx.request.body.userid=ctx.state.user.data.id
    var res = await indexService.AddCar(ctx.request.body)
    if(res.affectedRows>0){
        return ctx.body={
            code:200,
            message:''
        }
    }else{
        return ctx.body={
            code:403,
            message:''
        }
    }
}

const DeleteCar = async (ctx) => {
    var res = await indexService.DeleteCar(ctx.request.query)
    if (res.affectedRows > 0) {
        return ctx.body = {
            code: 200,
            message: ""
        }
    } else {
        return ctx.body = {
            code: 403,
            message: ""
        }
    }
}

const CarShow=async(ctx)=>{
    ctx.request.query.userid = ctx.state.user.data.id
    var res = await indexService.CarShow(ctx.request.query)
    if(res.cardata.length>0){
        return ctx.body={
            code:200,
            message:'',
            data:res
        }
    }else{
        return ctx.body={
            code:403,
            menubar:''
        }
    }
}

const UpdateCar = async(ctx)=>{
    var res = await indexService.UpdateCar(ctx.request.body)
    if(res.affectedRows>0){
        return ctx.body={
            code:200,
            message:''
        }
    }else{
        return ctx.body={
            code:403,
            message:''
        }
    }
}

See also

• koajs/conditional-get Conditional GET support for koa
• koajs/compress Compress middleware for koa
• koajs/mount Mount koa-static to a specific path

CCCCCCAAAAARRRR

<body>
    <div>
        <span>    </span><input type="text" id="shopname">
        <input type="button" value="   " onclick="Query()">
    </div>
    <table>
        <thead>
            <tr>
                <td>     </td>
                <td>     </td>
                <td>     </td>
                <td>     </td>
                <td>     </td>
            </tr>
        </thead>
        <tbody id="data"></tbody>
    </table>
    <div>
        <input type="button" value="  " onclick="Page(true)">
        <input type="button" value="  " onclick="Page(false)">
    </div>
</body>


<script>
    var page = 1;
    var size = 3;
    var zcount = 0
    const CarShow = async () => {
        var data = {
            page,
            size,
            shopname: document.getElementById('shopname').value
        }
        var res = await request.get('/car/show', {
            params: data
        })
        if (res.data.code == 200) {
            document.getElementById('data').innerHTML = res.data.data.cardata.map((i) => {
                return ` 
            <tr>
                <td>${i.shopname}</td>
                <td>${i.price}</td>
                <td>
                    <input type="button" value="-" onclick="Count(${i.id},true)">
                    ${i.count}
                    <input type="button" value="+" onclick="Count(${i.id},false)">
                    </td>
                <td>${i.zprce}</td>
                <td>   </td>
            </tr>
                `
            }).join('')
            zcount = res.data.data.zcount
        } else {
            document.getElementById('data').innerHTML = ''
        }
    }
    CarShow()
    const Page = (data) => {
        if (data) {
            if (page == 1) {
                return alert('')
            } else {
                page = page - 1
            }
        } else {
            if (page == Math.ceil(zcount / size)) {
                return alert('')
            } else {
                page = page + 1
            }
        }
        CarShow()
    }
    const Query = () => {
        page = 1
        CarShow()
    }
    const Count = async (id, data) => {
        var datas = {
            id,
            data
        }
        var res = await request.put('/car/update', datas)
        if (res.data.code == 200) {
            CarShow()
        } else {
            return alert('')
        }
    }
</script>

See also

• koajs/conditional-get Conditional GET support for koa
• koajs/compress Compress middleware for koa
• koajs/mount Mount koa-static to a specific path

LOGIN

<body>
    <div>
        <span> </span><input type="text" id="phone">
        <br>
        <span>  </span><input type="text" id="code">
        <br>
        <input type="button" value="  " onclick="SendCode()">
        <input type="button" value="   " onclick="Login()">
    </div>
</body>

<script>
    const SendCode=async()=>{
        var res = await request.post('/user/sendcode',{phone:document.getElementById('phone').value})
        if(res.data.code==200){
            return alert(res.data.data)
        }else{
            return alert(res.data.message)
        }
   }

   const Login=async()=>{
    var data={
        phone:document.getElementById('phone').value,
        code:document.getElementById('code').value,
    }
    var res = await request.post('/user/login',data);
    if(res.data.code==200){
        localStorage.setItem('token', res.data.data)
        alert('   ')
    }
   }
</script>

See also

• koajs/conditional-get Conditional GET support for koa
• koajs/compress Compress middleware for koa
• koajs/mount Mount koa-static to a specific path

License

MIT