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() { console.log("data received ending" + pathname); route(handle, pathname, response, postData); }); } http.createServer(onRequest).listen(8888); console.log("Server has started."); } exports.start = start;
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 the text: "+ querystring.parse(postData).text); response.end(); } exports.start = start; exports.upload = upload;
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;
result:
知识点：
require和exports的用法：
index.js中代码
var Hello = require(‘.hello‘); hello = new Hello(); hello.setName(‘Joey‘); hello.sayHello();
hello.js中代码
function Hello(){ var name; this.setName = function(thyName){ name = thyName; } this.sayHello = function(){ console.log(‘Hello ‘ + name); } } //exports.Hello = Hello; //此时我们在其他文件中需要通过 require(‘./hello‘).Hello来获取Hello对象，这种写法有点冗余 module.exports = Hello; //输出的就是Hello对象本身，不是上面的exports，上面的是暴露.Hello，.Hello赋予了Hello对象