February 2013
Intermediate to advanced
380 pages
7h 45m
Japanese
Content preview from Nodeクックブック
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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.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.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.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.
142
5 章 Websocket を使って Ajax を超える
server.js
で設定した
req.origin
のホスト名によるフィルタは、ブラウザからの攻撃を防ぐこ
とを念頭に置いています。ブラウザ以外では
origin
の値を自由に設定できますが、ブラウザで
WebSocket
を利用する場合と同じ脅威をもたらすものではありません。ブラウザ上での一番大き
な脅威は
JavaScript
インジェクション攻撃です。挿入されたスクリプトにより想定外の数の接続
が生成され、
DoS
（
Denial of Service
）を引き起こす可能性があります。
レシピ
5.2
socket.io
を使ったシームレスなフォールバック
古いブラウザは
WebSocket
をサポートしていません。これらのブラウザに対しても
WebSocket
の双方向通信に似たユーザエクスペリエンスを提供するためには、ブラウザやプラグインに合った
方法へのフォールバックが必要です。
古いブラウザを新しいサービスに対応させるのは地雷原に足を踏み入れることとほぼ同義です。
各ブラウザで長時間のテストを行う必要があり、場合によっては（
IE
の
Active X
htmlfile
オブ
ジェクトなど）ベンダー固有のプロトコルについて深い知識を有している必要があります。
socket.io
は、実行中のブラウザが対応している中で一番適切なリアルタイム通信技術を使っ
て、
WebSocket
、もしくは
WebSocket
ライクな双方向通信
API
をサーバとクライアントに提供し
ます。古い ...
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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.