Node.js Express (Cross-domain processing)

var mysql = require('mysql'); 
const express = require('express');
var bodyParser = require('body-parser');   / / body parsing
var cors = require('cors'); 


const app = express();
app.use(bodyParser.json())
.use(bodyParser.urlencoded({ extended: true }))
.use(function (req, res, next) {
     // cross-domain processing
     res.setHeader('Access-Control-Allow-Origin'.The '*');  // Allow any source
     res.setHeader('Access-Control-Allow-Methods'.'GET, POST, OPTIONS, PUT, PATCH, DELETE');  
     res.setHeader('Access-Control-Allow-Headers'.The '*');   // Any type is allowed
     // res.writeHead(200, {"Content-Type": "text/plain; charset=utf-8"});
    next();  // The next method is a recursive call
});

app.use(cors());
 

//jsonp
app.get('/jsonp/callback=:cbk'.function(req,res){
    console.log('ooopp heelo');
    var bk = req.params.cbk;
    console.log(bk);
    var vt = {name:'Tim'.age:28.id:bk};
   
    res.send(bk+'('+JSON.stringify(vt)+') ');
})
 
app.get('/api/info'.(req,res) = > {
    var data={
                "code": "200"."msg": "success"."result": [{
                    "id":1."name": "laney"."content": "test01"
                },
                {
                    "id":2."name": "ben"."content": "test02"
                },
                {
                    "id":3."name": "lili"."content": "test03"
                }]
            }
    res.json({
        err_code:0.data:data.result
    })
})
app.post('/api/msg'.(req,res) = > {
    var data={
                "code": "200"."msg": "success"."result": {
                    "focus":true."data": [{"id":1."name": "laney01"."content": "test01"
                                },
                                {
                                    "id":2."name": "ben"."content": "test02"
                                },
                                {
                                    "id":3."name": "lili"."content": "test03"
                            }]
                }
             }
    res.json({
        err_code:0.result:data.result
    })
})

app.post('/api/hello'.(req,res) = > {
    var data={
                "code": "200"."msg": "success"."result": [{
                    "id":10."name": "laney"."content": "hello world"}}; res.json({err_code:0.result:data.result
    })
})

app.listen(3000.() = > {
    console.log('Server started on port 3000');
});
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