您的位置：首页 > Web前端 > Node.js

Node.Js 处理post数据

2014-08-21 22:56 531 查看

实现思路就是：将data和end事件的回调函数直接放在服务器中，在data事件回调中收集所有的POST数据，当接收到所有数据，触发end事件后，其回调函数调用请求路由，并将数据传递给它，然后，请求路由再将该数据传递给请求处理程序。

首先，我们设置了接收数据的编码格式为UTF-8，然后注册了“data”事件的监听器，用于收集每次接收到的新数据块，并将其赋值给postData 变量，最后，我们将请求路由的调用移到end事件处理程序中，以确保它只会当所有数据接收完毕后才触发，并且只触发一次。我们同时还把POST数据传递给请求路由

index.js

var server = require("./server");
var router=require("./router");
var requestHandlers=require("./requestHandlers");

var handle = {}
handle["/"] = requestHandlers.start;
handle["/start"] = requestHandlers.start;
handle["/upload"] = requestHandlers.upload;

server.start(router.route,handle);

server.js

var http = require("http");
var url=require("url");

function start(route,handle) {
function onRequest(request, response) {
var postData="";
var pathname=url.parse(request.url).pathname;
console.log("Request for"+pathname+"received.");

request.setEncoding("utf8");

request.addListener("data", function(postDataChunk) {
postData += postDataChunk;
console.log("Received POST data chunk '"+
postDataChunk + "'.");
});

request.addListener("end", function() {
route(handle, pathname, response, postData);
});
//route(handle,pathname,response);

//response.writeHead(200, {"Content-Type": "text/plain"});
//response.write("this is a demo");
//response.end();
}

http.createServer(onRequest).listen(5656,'127.0.0.1');
console.log("Server has started. localhost:5656");
}

exports.start = start;

router.js

function route(handle,pathname,response,postData){
console.log("About to route a request for"+pathname);
if(typeof handle[pathname]=='function'){
handle[pathname](response,postData);
}
else{
console.log("no request handler found for"+pathname);
response.writeHead(404, {"Content-Type": "text/plain"});
response.write("404 Not found");
response.end();
}
}
exports.route=route;

requestHandlers.js

//var querystring = require("querystring");

function start(response,postData) {
console.log("Request handler 'start' was called.");

var body = '<html>'+
'<head>'+
'<meta http-equiv="Content-Type" content="text/html; '+
'charset=UTF-8" />'+
'</head>'+
'<body>'+
'<form action="/upload" method="post">'+
'<textarea name="text" rows="20" cols="60"></textarea>'+
'<input type="submit" value="Submit text" />'+
'</form>'+
'</body>'+
'</html>';

response.writeHead(200, {"Content-Type": "text/html"});
response.write(body);
response.end();
}

function upload(response,postData) {
console.log("Request handler 'upload' was called.");
response.writeHead(200, {"Content-Type": "text/plain"});
response.write("You've sent: " + postData);
response.end();
}

exports.start = start;
exports.upload = upload;

运行：node mynode/index

浏览器输入http://localhost:5656/

结果：

在文本框里输入“I LOVE YOU” 点击提交

使用querystring模块只提取文本，修改一下requestHandlers.js使只返回文本

var querystring = require("querystring");

function start(response,postData) {
console.log("Request handler 'start' was called.");

var body = '<html>'+
'<head>'+
'<meta http-equiv="Content-Type" content="text/html; '+
'charset=UTF-8" />'+
'</head>'+
'<body>'+
'<form action="/upload" method="post">'+
'<textarea name="text" rows="20" cols="60"></textarea>'+
'<input type="submit" value="Submit text" />'+
'</form>'+
'</body>'+
'</html>';

response.writeHead(200, {"Content-Type": "text/html"});
response.write(body);
response.end();
}

function upload(response,postData) {
console.log("Request handler 'upload' was called.");
response.writeHead(200, {"Content-Type": "text/plain"});
response.write("You've sent: " + querystring.parse(postData).text);
response.end();
}

exports.start = start;
exports.upload = upload;

重新启动,依旧输入I LOVE YOU ，提交

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签： Node.js

相关文章推荐

新的分享

章节导航