August 2016
Intermediate to advanced
384 pages
9h 20m
Japanese
Content preview from Docker
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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.
85
6
章
シンプルな
Web
アプリケーションの 作成
本章では、これまでに作成した
"Hello World!"
のプログラムを、テキストを入力したユーザー
に固有のイメージを生成する、シンプルな
Web
アプリケーションにします。こういったイメージ
は、
identicon
と呼ばれることがあり、ユーザー名や
IP
アドレスから生成された固有のイメージ
で、ユーザーを識別できるようにするために使うことができます。本章の終わりには、実際に動作
する基本的なアプリケーションができあがります。このアプリケーションは、今後の数章で拡張し
て楽しんでいきましょう。このアプリケーションを作成することで、
Docker
コンテナを合成して
完全に動作するシステムを構築する方法を知ると共に、これが自然にマイクロサービスのアプロー
チにつながっていくことを見ていきましょう。
identicon
identicon は、ある値から自動的に生成される画像で、通常は IP アドレスのハッシュか、ユーザー名が
値として使われます。identicon は、オブジェクトを画像として表現してくれるので、識別が容易になりま
す。identicon のユースケースには、Web サイトのユーザーに対し、ユーザー名や IP アドレスのハッシュ
を取ることで識別用の画像を提供することや、Web サイトで自動的に favicon を提供することがあります。
identicon を最初に開発したのは Don Park で、2007 年のはじめのことでした。彼が、自分の
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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.