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リクエストハンドラで表示内容を制御

概要

URIに応じて表示内容を変更

サンプル

index.js

// サーバ、ルーティング、リクエストメソッドのモジュールを読み込み
var server = require("./server");
var router = require("./router");
var requestHandlers = require("./requestHandlers");
 
// リクエストのハンドラを設定
var handle = {}
handle["/"] = requestHandlers.start;
handle["/start"] = requestHandlers.start;
handle["/upload"] = requestHandlers.upload;
 
// ハンドラパラメータを追加
server.start(router.route, handle);
 
 

server.js

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

router.js

function route(handle, pathname) {
  console.log("About to route a request for " + pathname);
  if (typeof handle[pathname] === 'function') {
    return handle[pathname]();
  } else {
    console.log("No request handler found for " + pathname);
    return "404 Not found";
  }
}
 
exports.route = route;
 
 
 

requestHandlers.js

function start() {
  console.log("Request handler 'start' was called.");
  return "Hello Start";
}
 
function upload() {
  console.log("Request handler 'upload' was called.");
  return "Hello Upload";
}
 
exports.start = start;
exports.upload = upload;
 
 

実行

コマンド

D:\Tools\Works\nodejs_test\sample06>node index.js
Server has started.
Request for / received.
About to route a request for /
Request handler 'start' was called.
Request for /favicon.ico received.
About to route a request for /favicon.ico
No request handler found for /favicon.ico
Request for /uploads received.
About to route a request for /uploads
No request handler found for /uploads
Request for /favicon.ico received.
About to route a request for /favicon.ico
No request handler found for /favicon.ico
Request for /upload received.
About to route a request for /upload
Request handler 'upload' was called.
Request for /favicon.ico received.
About to route a request for /favicon.ico
No request handler found for /favicon.ico
 

画像

uri「/」

uri「/upload」

uri「/uploadsのため、404 Not Found」

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