Nodejs：接收参数

login.html

<html>
<head></head>
<body>
	登录页面
	<img src="./showimg" />
	<form action="./login" method="post">
		<table align="center">
			<tr>
				<td>email:</td>
				<td><input type="text" name="email" /></td>
			</tr>
			<tr>
				<td>pwd:</td>
				<td><input type="text" name="pwd" /></td>
			</tr>
			<tr>
				<td align="center">
					<input type="submit" value="提交">
				</td>
			</tr>
		</table>
	</form>
</body>
</html>

optfile.js

//-------------optfile.js-------------------------
var fs = require('fs');
module.exports = {
	readfile: function (path, recall) { //异步执行
		fs.readFile(path, function (err, data) {
			if (err) {
				console.log("异步执行error：" + err);
				recall("文件不存在，异步执行error：" + err);//异步处理异常
			} else {
				//console.log(data.toString());
				recall(data);
			}
		});
		console.log("===异步方法执行完毕===");
	},
	readImg: function (path, res) {
		fs.readFile(path, 'binary', function (err, filedata) {
			if (err) {
				console.log(err);
				return;
			} else {
				console.log("输出文件");
				res.write(filedata, 'binary');
				res.end();
			}
		});
	}
}

router.js

var optfile = require('../model/optfile2.js');
var url = require('url');//url需导入
var querystring = require('querystring'); //post需导入

function getRecall(req, res) {
	res.writeHead(200, {
		'Content-Type': 'text/html;  charset=utf-8'
	});

	function recall(data) {
		res.write(data);
		res.end(''); //不写则没有http协议尾
	}
	return recall;
}

module.exports = {
	login: function (req, res) {
		//--------get方式接收参数----------------1
		// var rdata = url.parse(req.url, true).query;
		// console.log(rdata);
		// if (rdata['email'] != undefined) {
		// 	console.log(rdata['email']);
		// 	console.log(rdata['pwd']);
		// }

		//-------post方式接收参数----------------2
		//定义了一个post变量，用于暂存请求体的信息       
		var post = '';      
		 //通过req的data事件监听函数，每当接受到请求体的数据，就累加到post变量中
		req.on('data', function (chunk) {      
			post += chunk;
		});
		//-------注意异步-------------      
		//在end事件触发后，通过querystring.parse将post解析为真正的POST请求格式，然后向客户端返回。
		req.on('end', function () {       
			post = querystring.parse(post);
			if (post['email'] != undefined && post['pwd'] != undefined) {
				console.log('email:' + post['email'] + '\n');
				console.log('pwd:' + post['pwd'] + '\n');
			}
			recall = getRecall(req, res);
			optfile.readfile('./view/login.html', recall);
		});
	},
	showimg: function (req, res) {
		res.writeHead(200, {
			'Content-Type': 'image/jpeg'
		});
		optfile.readImg("./view/pig.png", res);
	}
}

/*
获取参数
*/
var http = require('http');
var url = require('url');
var router = require('./model/router');
var exception = require('./model/Exception');

http.createServer(function (request, response) {
	if (request.url !== "/favicon.ico") { //清除第2此访问                
		pathname = url.parse(request.url).pathname;
		pathname = pathname.replace(/\//, ''); //替换掉前面的/        
		try {

			router[pathname](request, response);

		} catch (err) {
			console.log('捕获到异常=' + err);
			response.writeHead(200, {
				'Content-Type': 'text/html;        charset=utf-8'
			});
			response.write(err.toString());
			response.end('');
		}
		console.log("server执行完毕");
	}
}).listen(8000);
console.log('Server running  at http://127.0.0.1:8000/');

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