Node.js学习

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Node.js 路由

URL解析，需要url和querystring两个模块
url.parse(string).query
                                           |
           url.parse(string).pathname      |
                       |                   |
                       |                   |
                     ------ -------------------
http://localhost:8888/start?foo=bar&hello=world
                                ---       -----
                                 |          |
                                 |          |
              querystring(string)["foo"]    |
                                            |
                         querystring(string)["hello"]

实例：

目录下有三个文件：index.js, server.js, router.js

//index.js
var server = require('./server');
var router = require('./router');

server.start(router.route);

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//server.js
var http = require("http");
var url = require("url");

function start(route) {
    function onRequest(request, response) {
        var pathname = url.parse(request.url).pathname;
        console.log("Request for " + pathname + "received.");
        
        route(pathname);
        
        response.writeHead(200, {"Content-Type": "text/plain"});
        response.write("Hello World!");
        response.end();
    }
    
    http.createServer(onRequest).listen(8888);
    console.log("Server has started...");
    
}

exports.start = start;

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//router.js
function route(pathname) {
    console.log("About to route a request for " + pathname);
}

exports.route = route;

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