March 2018
Beginner to intermediate
624 pages
16h 10m
Japanese
Content preview from Head First Python 第2版 ―頭とからだで覚えるPythonの基本
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何が間違っていたのか？
HTTP
ステータスコードを理解する
Web
アプリケーションに何か問題があると、
Web
サーバは
HTTP
ステータ
スコードで応答します（ブラウザに送信します）。
HTTP
は、ブラウザとサー
バがやり取りする通信プロトコルです。ステータスコードの意味は規定され
ています（右側の「マニア向け情報」を参照）。実際には、すべてのリクエスト
がレスポンスに
HTTP
ステータスコードを作成します。
Web
アプリケーションからブラウザに送られたステータスコードを確認す
るには、コマンドプロンプトに現れるステータスメッセージを再度確認しま
す。次のように表示されています。
...
127.0.0.1 - - [23/Nov/2015 21:55:59] "GET /entry HTTP/1.1" 200 -
127.0.0.1 - - [23/Nov/2015 21:55:59] "GET /static/hf.css HTTP/1.1" 304 -
127.0.0.1 - - [23/Nov/2015 21:56:54] "POST /search4 HTTP/1.1" 405 -
1
GET
メソッド
通常、ブラウザはこのメソッドを使って
Web
サーバからリソー
スをリクエストするので、圧倒的に使われます（ここで「通常」と
言っているのは、紛らわしいことに
GET
を使ってブラウザから
サーバにデータを送信できるからですが、ここではこの方法は
取り上げません）。この
Web
アプリケーションのすべての
URL
は現在
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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.