February 2013
Intermediate to advanced
380 pages
7h 45m
Japanese
Content preview from Nodeクックブック
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35
レシピ 2.1 POST データを処理する
解説
req.method
の値から、クライアントから送信されてサーバに到達したリクエストが
GET
リクエ
ストか
POST
リクエストであるかを確認します。
GET
の場合は、あらかじめ
form
変数に格納し
ておいた
form.html
の内容をクライアントに送信します。
POST
の場合、クライアントから連続して送信される
POST
データを受信するたびに、その内
容を
postData
変数に送ります。データを受信するたびに、
req
オブジェクトが
data
イベントを発
生させます。
受信したデータのサイズが
maxData
変数に設定されているサイズを超過した場合、
postData
の
内容を破棄して
pause
でストリームの受信を中断します（このとき、
stream.pause
の代わりに
stream.destroy
を使用すると、クライアントにレスポンスを返せなくなります）。中断されたスト
リームはしばらく後に、
V8
のガベージコレクションでメモリから削除されます。このとき、クラ
イアントには
413 Request Entity Too Large
レスポンスコードを返します。
end
イベントリスナ発行時に
postData
にデータが入っている場合は、
querystring.parse
メソッ
ドを使って
POST
データをオブジェクトに変換します。オブジェクトに変換することによって、
POST
データを使ったさまざまな操作や解析、データベース入力などを簡単に行うことできるよう
になります。ここでは、単純に ...
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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.