August 2017
Intermediate to advanced
500 pages
12h 3m
Japanese
Content preview from PythonとJavaScriptではじめるデータビジュアライゼーション
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.
285
12.2 静的ファイルの配信
ります。ほとんどの
Web
可視化で使われるシングルページアプリケーションは、必要な静的ファ
イルを配信するためにサーバ側に多くの追加機能を必要としません。
Flask
で特に興味深いのは、
数行の
Python
で堅牢な
RESTful WebAPI
を利用して簡潔で効率のよいデータサーバを提供でき
ることです。詳しくは「
12.3
Flask
での動的データ」と
13
章で例を示しますが、まず静的デー
タの速度の遅い配信を行ってみましょう。
12.2
静的ファイルの配信
データを動的に作成するオーバーヘッドを必要としない多くの
Web
サイトは、静的にデータを
配信します。この形式では、基本的にすべての
HTML
ファイルと（重要なことに）データ（通常
は
JSON
や
CSV
フォーマット）がサーバのファイルシステム上にファイルとして存在し、データ
ベースを呼び出さずに配信できる状態になっています。
静的ページはキャッシュが簡単なので、高速に配信できます。また、データベース呼び出しは非
道なハッカーの主な攻撃対象なので（例えば、インジェクション攻撃（
https://ja.wikipedia.org/
wiki/SQL
インジェクション）など）、安全性も確保できます。しかし、速度と安全性の向上の代償
として、柔軟性が失われます。あらかじめ作成したページに限定されているので、多変量のデータ
の組み合わせを要求するようなユーザとのやり取りができません。
新米の開発者にとって、静的データの配信は魅力的です。
Web API ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.