April 2014
Intermediate to advanced
220 pages
4h 7m
Japanese
Content preview from AngularJSアプリケーション開発ガイド
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113
5
章
サーバとの通信
ここまでの章で解説してきたことのほとんどは、
AngularJS
アプリケーションの構成や各コン
ポーネントの仕組み、あるいはテンプレートの働きなどについてのものでした。これらだけでも
クールで素敵なアプリケーションを作成できますが、その活躍の場はクライアント側にほぼ限定さ
れてしまいます。
$http
サービスを使った通信については
2
章でも簡単に紹介しましたが、ここで
は実際のアプリケーションを例にとって通信の仕組みをより詳しく解説してゆきます。
まず、
AngularJS
アプリケーションでの通信を可能にする仕組みについて、下位レイヤーのも
のと抽象化されたラッパーとをともに紹介します。組み込みで用意されているキャッシュの仕組み
を使い、アプリケーションの高速化を図る方法も明らかにします。リアルタイム通信を行うアプリ
ケーションを作成したいなら、ディレクティブを使って
Socket.IO
（
http://www.socket.io/
）をラッ
プしている
8
章の例を参考にしてください。
5.1
$http
を使った通信
Ajax
アプリケーションからサーバに対して、
XMLHttpRequest
を使って通信を行う場合につい
て考えてみましょう。まず、このオブジェクトの参照を取得し、リクエストを実行してレスポンス
を受け取り、エラーコードを確認し、最後にレスポンスの内容を解釈するという処理が行われます。
具体的なコードは以下のようになります。
var xmlhttp = new XMLHttpRequest(); ...
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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.