node.js之客户端发起https和http请求

应用场景:
1.VsCode插件开发(主要针对以javascript为主的vscode插件);
2.使用Node.js开发的客户端程序

Node.js之http请求(客户端)

代码示例如下:

var http = require('http');  

var qs = require('querystring');  

var userCode = "";

var post_data = {
    userCode: userCode};//这是需要提交的数据  

var content = qs.stringify(post_data);  

var options = {
    hostname: 'www.test.com',
    port: ,
    path: '/test-web/api/sysUser/getUserCodeByInfo',
    method: 'POST',
    headers: {
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
    }
};  

var req = http.request(options, function (res) {
    console.log('STATUS: ' + res.statusCode);
    console.log('HEADERS: ' + JSON.stringify(res.headers));
    res.setEncoding('utf8');
    res.on('data', function (chunk) {
        console.log('BODY: ' + chunk);  

        var data = JSON.parse(chunk);
        console.log(data.returnCode);
    });
});  

req.on('error', function (e) {
    console.log('problem with request: ' + e.message);
});  

// 将数据写入请求体
req.write(content);//注意这个地方  

req.end();

Node.js之https请求(客户端)

代码示例如下:

var querystring = require('querystring');

const https = require("https");
    var userCode = "";
    var post_data = { userCode: userCode }
    var contents = querystring.stringify(post_data);

    var options = {
        hostname: "www.test.com",
        port: , //
        path: "/test-web/api/sysUser/getUserCodeByInfo?"+contents ,
        method: "POST",
        rejectUnauthorized: false,
        headers: {
            Accept: "*/*",
            "Accept-Encoding": "utf-8",
            "Accept-Language": "zh-CN,zh;q=0.8",
            Connection: "keep-alive",
            Host: "www.test.com"
        },

    };
    var mData = '';
    var req = https.request(options, function (res) {
        res.setEncoding('utf-8');

         res.on('data', function (chunk) {
         var data = JSON.parse(chunk);
         console.log('BODY: ' + data);
    });
    });
    // req.write(contents);
    req.on("error", function (e) {
        console.error("====================================================" + e);
    });
    req.end();

上面的hostname，如果不是域名修改为ip地址，请修改成这样，将www.test.com改为192.168.126.130，切不可指定为http://192.168.126.130，
否则会出现请求失败，主要体现为如下错误:

还有一点需要强调，如果参数不用querystring.stringify()包裹的话，会出现如下错误:

Request path contains unescaped characters

那么为什么需要querystring呢？
因为querystring.stringify()能将对象序列化成URL的形式，以&进行拼接。