下面是一个web登陆模拟过程。当我们问一个链接，你得到一个表格，然后填写相应的表格值，然后提交登陆。
var http = require('http');
var querystring = require('querystring');
http.createServer(function (request, response) {
var responseString = '';
response.writeHead(200, {'content-type': 'text/html'});
// 假设是get请求
var postData = "";
if (request.method == "GET") {
responseString = '<!doctype html><html lang="en">\
<head><meta charset="UTF-8" />\
<title>Document</title>\
</head>\
<body>\
<form action="/" method="post">\
<input type="text" name="name" value="xulidong" />\
<input type="text" name="password" value="123456" />\
<input type="text" name="code" value="abc123" />\
<input type="submit" value="submit" />\
</form>\
</body>\
</html>';
response.write(responseString);
response.end();
} else if (request.method == "POST") {
request.setEncoding("utf8");
request.addListener("data", function (postDataChunk) {
postData += postDataChunk;
});
request.addListener("end", function () {
var objectPostData = querystring.parse(postData);
for (var i in objectPostData) {
responseString += i + " => " + objectPostData[i] + "<br>";
}
response.write(responseString);
response.end();
});
}
}).listen(8080, '192.168.33.98');
打开浏览器输入：http://192.168.33.98:8080/，192.168.33.98是我电脑的IP，会得到如图的网页：
这个网页是我们在处理GET请求的代码中生成的，默认都填入的对应的值，我们能够改动或者直接点击submitbutton提交，然后得到例如以下的结果：
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