[办公软件] Node.js学习笔记（十一、路由）

url.parse(string).query
                       |
       url.parse(string).pathname    |
             |           |
             |           |
           ------ -------------------
http://localhost:8888/listCategory
                ---     -----
                 |      |
                 |      |
        querystring(string)["foo"]  |
                      |
             querystring(string)["hello"]

var http = require("http"); 
var url = require("url"); 
function start(route, handle) { 
  function onRequest(request, response) { 
  var pathname = url.parse(request.url).pathname;    //获取路径
  var html = route(handle, pathname); 
  response.writeHead(200, {"Content-Type": "text/plain"}); 
  response.write(html); 
  response.end(); 
  } 
  http.createServer(onRequest).listen(8888); 
  console.log("Server has started.");
} 
exports.start = start;

function route(handle, pathname) { 
  if (typeof handle[pathname] === 'function') { 
  return handle[pathname](); 
  } else {
  return pathname + ' is not defined';
  } 
} 
exports.route = route;

//业务处理模块
function listCategory() { 
  return "a lot of categorys";
} 
function listProduct() { 
  return "a lot of products";
} 
exports.listCategory = listCategory; 
exports.listProduct = listProduct;

handle["/listCategory"] = requestHandlers.listCategory;

var server = require("./server"); 
var router = require("./router"); 
var requestHandlers = require("./requestHandlers"); 
var handle = {} 
handle["/listCategory"] = requestHandlers.listCategory; 
handle["/listProduct"] = requestHandlers.listProduct; 
server.start(router.route, handle);

node index.js