February 2013
Intermediate to advanced
380 pages
7h 45m
Japanese
Content preview from Nodeクックブック
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47
レシピ 2.3 Node を HTTP クライアントとして使用する
レシピ
2.3
のコードと同様に、
request
のコールバック関数で
res
オブジェクトの
data
イベン
トを待機します。
http.request
は
clientRequest
オブジェクトを返します。ここでは、そのオブ
ジェクトを
request
変数に格納しておきます。
request
のコールバック関数を設定した後、
POST
データとなるプロセスの引数を
forEach
を
使って取得します。
0
番目と
1
番目の引数は
node
と
post.js
なので、
2
番目以降の引数を探しま
す（
forEach
は
ECMAScript 5
標準ですが、レシピ
1.1
でも説明したとおり、
Node
で使う限りは
互換性の問題はなく安全です）。
res.write
とほぼ同じ記法の
request.write
メソッドでリクエス
トを構築します。
forEach
はコールバック関数を使いますが、非同期実行ではありません。そのた
め、
request.end()
は常に
forEach
ループが終了した後に呼ばれます。
ミニレシピ
2.3.2
multipart
ファイルアップロードを行う
本レシピでは、
multipart
メッセージをサーバに送信するクライアントを作成します。下記のよ
うにコマンドラインに入力することにより、複数のファイルを一度にサーバに送信します。
% node upload.js
file1 file2 fileN
multipart
データを送信するには、
multipart
メッセージの形式でリクエストデータを構築する必 ...
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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.