Nodejs搭建服务器及express编写接口

不念不忘少年蓝@ 2022-04-23 00:02 410阅读 0赞

![20190121222321677.png][]

Nodejs用http模块搭建http服务器：

//引入http模块
    var http = require("http");
    var url = require('url');
    //设置主机名
    var hostName = '192.168.1.7';
    //设置端口
    var port = 8092;
    
    //创建服务
    var server = http.createServer(function (req, res) {
        var string = url.parse(req.url, true);
        console.log("URL:" + req.url + "  " + string.pathname);
        res.setHeader('Access-Control-Allow-Origin', "*")
        res.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        res.setHeader('Content-Type', 'text/plain');
        res.end("hello nodejs");
    
    });
    server.listen(port, hostName, function () {
        console.log(`服务器运行在http://${hostName}:${port}`);
    });

运行效果：

![20190121222716514.png][]

用Nodejs的express搭建http服务器：

用express搭建GET请求接口：

/**
     * express建立GET接口
     * http://192.168.1.7:8092/a/ab?name='name12'&pwd='123'
     */
    routes.get('/ab', (req, res) => {
        var string = url.parse(req.url, true);
        //解析参数
        var params = url.parse(req.url, true).query;
        console.log(params)
        var user = {};
        user.name = params.name;
        user.pwd = params.pwd;
        var responseJson = { name: 'abc', pwd: '123' };
        var response = { status: 2, data: user };
        res.send(JSON.stringify(response));
        console.log("URL:" + req.url + "  " + string.pathname);
        res.status(200).json(response);
        //有数据返回用res.send();
        //无数据返回用res.end();
        // res.end("hello nodejs");
    });

用express搭建POST请求接口：

/**
     * express建立POST接口
     */
    routes.post('/r', (req, res) => {
        var string = url.parse(req.url, true);
        console.log("URL:" + req.url + "  " + string.pathname);
        //解析参数
        var params = req.body;
        var user = {};
        user.name = params.name;
        user.pwd = params.pwd;
        var response = { status: 1, data: user };
        res.send(JSON.stringify(response));
        res.send('post:' + string.pathname + "  " +
            JSON.stringify(text));
        res.end();
        console.log(req.method);//post
        console.log(req.body);//{ a: '3', b: '4', c: '5' }
        // console.log(req.body.a); //3
        // res.end("hello nodejs");
    });

原生GET请求：

/**
     * 原生GET请求
     */
    function requestGet() {
        var http = require('http');
        var qs = require('querystring');
        // var data = {
        //     a: 123,
        //     time: new Date().getTime()
        // };//这是需要提交的数据 
        // var content = qs.stringify(data);
        var options = {
            hostname: hostName,
            port: port,
            path: '/getList',// + content
            method: 'GET'
        };
        var req = http.request(options, function (res) {
            // console.log('STATUS: ' + res.statusCode);
            // console.log('HEADERS: ' + JSON.stringify(res.headers));
            // res.setEncoding('utf8');
            // alert('body:' + res.body)
            res.on('data', function (data) {
                console.log('BODY: ' + data);//返回数据
                alert('body:' + data)
            });
        });
        req.on('error', function (e) {
            console.log('problem with request: ' + e.message);
        });
        req.end();
    }

原生POST请求：

/**
     * 原生POST请求
     */
    function requestPost() {
        var http = require('http');
        var querystring = require('querystring');
        var contents = querystring.stringify({
            name: 'nameuser',
            pwd: '123'
        });
        var options = {
            host: hostName,
            port: port,
            path: '/setList',
            method: 'POST',
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded',
                'Content-Length': contents.length
            }
        }
        var req = http.request(options, function (res) {
            res.setEncoding('utf8');
            res.on('data', function (data) {
                console.log("data:", data);//返回数据
            });
        });
        req.write(contents);
        req.end();
    }

[20190121222321677.png]: /images/20220325/ad0090cc57fe4d65961a56a10350d2e0.png
[20190121222716514.png]: /images/20220325/e256f2f4036f44dfa0174bea39bc1080.png