本節我們做一個簡單的demo,post數據，並且接受數據
requestHandlers的模塊
應用程序需要新的部件，因此加入新的模塊 -- 已經無需爲此感到新奇了。我們來創建一個叫做requestHandlers的模塊，並對於每一個請求處理程序，添加一個佔位用函數，隨後將這些函數作爲模塊的方法導出：
requestHandlers的模塊
start() : POSt表單HTML
upload : POST數據獲取頁面
requestHandlers.js
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;
router模塊
通過檢查給定的路徑對應的請求處理程序是否存在，如果存在的話直接調用相應的函數，並返回相應是字符串
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;
server模塊
處理請求模塊
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);
});
}
http.createServer(onRequest).listen(8888);
console.log("Server has started.");
}
exports.start = start;
index模塊
啓動模塊，主模塊
index.js
var server = require("./server");
var router = require("./router");
var requestHandlers = require("./requestHandlers");
var handle = {}
//區分大小寫的
handle["/"] = requestHandlers.start;
handle["/start"] = requestHandlers.start;
handle["/upload"] = requestHandlers.upload;
server.start(router.route, handle);
運行後效果
如果現在啓動應用（node index.js，始終記得這個命令行），隨後請求一個URL，我請求的是http://localhost:8888/，然後顯示的是一個form表單，輸入數據後提交表單後就會跳轉到http://localhost:8888/upload，你將會看到應用輸出相應的信息，這表明我們的HTTP服務器已經在使用路由模塊了，並會將請求的路徑傳遞給路由，路由再找到對應的處理函數：
本篇文章來源於 Linux公社網站(www.linuxidc.com) 原文鏈接：http://www.linuxidc.com/Linux/2012-10/72627p6.htm
