February 2013
Intermediate to advanced
380 pages
7h 45m
Japanese
Content preview from Nodeクックブック
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168
6 章 Express で開発をスピードアップ
参照してください）。
Express
は擬似メソッドを使ってブラウザがサポートしていないメソッドを
処理しますが、通常の
HTTP
メソッドを処理することもできます。
app.router
は、
app.get
や
app.post
などで定義されているすべてのルートを保持しています。
アプリケーションスタックで
app.router
を処理する順番が回ってくると、保持しているルートの
処理を実行します。アプリケーションスタックに
app.router
が渡されていない場合は、
app.get
などで定義されたルート（ルート定義自体がミドルウェア）が渡された順番でアプリケーションス
タックの末尾に追加されます。
Express
（
Connect
）のミドルウェア（関数）は以下の構造を持っています。
function (req, res, next) {
//
処理
next();
}
next
パラメータはコールバックのような仕組みで、次に実行するミドルウェアを呼び出します。
app.js
では
app.router
が
express.static
の前に配置されているため、リクエストが行われると、
app.router
に格納されている（
app.get
や
app.post
などで設定した）ルートに合致するかどうか
を判定します。
app.router
でルートが発見されず
next()
が呼ばれた場合にのみ、
express.static
でスタティックファイルを探します。
ミニレシピ
6.1.2
routes/index.js ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.