Differences Between Get and Post - Web Development Udacity English Japanese

Differences Between Get and Post - Web DevelopmentYouTube↗ IA↗(long shot)
Education 78.3K views 516 likes 18 dislikes 22 Apr 2012

Udacity 651K subscribers United States YouTube↗

Click to Play Video

Let's talk a little bit about the difference between GET and POST.

GETとPOSTの違いを見ていきます

We've already seen one of the differences, and that's

先ほど1つ違いを話しました

GET parameters are included in the URL

GETの値はURLに表示されますが

and POST parameters are included in the body.

POSTの値はボディにあります

Another difference is that GET requests

GETリクエストがよく使われるのは

are often used for fetching documents

データを読み出す時です

and GET parameters are usually used to describe

GETの値からは探しているファイルや

which document we're looking for

今閲覧しているページなどの

or maybe what page we're on

情報が得られます

or things of that nature-- basically, things that are describing what we're getting;

私たちが取り出す情報を表示しているのです

where POST parameters are often used for updating data--

一方でPOSTがよく使われるケースは

for actually making changes to the Server or to the data held on the Server.

データの更新やサーバの変更やサーバ上にあるデータを変更する際です

Another difference is that GET parameters-- because they are in the URL--

大きな違いとして挙げられるのは GETの値はURLに入るため

have a maximum URL length,

文字数に限界があります

or they're affected by the maximum URL length

URLの最大文字数しか

because you can only encode so many parameters.

エンコードすることができません

For example, I think Internet Explorer

例えばInternet Explorerでは

allows 2000 characters in the URL,

URLで表示文字数は2000字ほどです

or something like that, which can be quite limiting.

文字数には制限が出てしまいます

POSTs, by default, have no maximum length.

デフォルトの設定であれば POSTで使える文字数に制限はありません

Now, the Server can be configured--and most are--

多くのサーバには最大文字数が

to have a maximum length, but it's usually substantially longer than 2000 characters.

設定されていますが2000字よりもずっと多い字数を使用できます

It's probably a few megabytes.

通常数メガバイト分です

Another difference is that GET parameters

文字数以外にもGETパラメータは

are generally okay to cache.

キャッシュできます

And when you make a GET request--a simple request for a URL--

GETリクエストを送信すると

there's a good chance that it's been cached.

キャッシュされていることが多いです

There are a lot of machines between

私たちのコンピュータと

you and the Server--

サーバの間には様々な

or often there are--

機械を通していることが多いです

and it saves a lot of effort

そのためキャッシュされていれば

if we know the document hasn't changed

データ変更の有無が

to--you know--cache it along the way

効率よく確認できるのです

so you don't have to request it new every time.

毎回更新を送信する必要がないのです

POST parameters are almost never cached.

POSTパラメータはキャッシュされません

That's because you're probably updating data on the Server.

サーバ上でデータを更新するからです

And so the industry standard is: don't cache POST requests.

業界標準ではPOSTリクエストはキャッシュしません

One more difference is that GET requests--

GETリクエストは

because they're okay to cache

キャッシュされますし

and because you're usually describing

探しているデータの

which document you want--

取り出しを行うため

they shouldn't change the Server.

サーバは変えるべきではありません

You should be able to make the same GET request over and over,

常に同じGETリクエストを作り続け

and the Server shouldn't change.

サーバの変更はできません

POST requests, on the other hand, are okay to change the Server.

一方でPOSTはサーバの変更ができます

That's what they're generally used for,

送信されたリクエストは

is requests that update the Server.

サーバ上で更新されます

That's why they're not cached; there's no max length,

そのため文字数の制限や

and that's the whole story.

キャッシュされることがないのです

So in short, GET requests should be

まとめるとGETリクエストは

simple requests for fetching a document.

データを読み出す際に使うリクエストで

And GET parameters should be used to describe

GETの値は探しているページの場所を

what document or what page you're looking for.

表示しています

And POST parameters are used for making updates to the Server.

一方でPOSTの値はサーバ上で更新されています

And POST requests generally are destructive in nature.

そしてPOSTリクエストには破壊的な性質があります

Now, if you don't follow these rules,

このルールを守らないと

you can get into a little trouble.

トラブルが起きてしまうことがあります

Similar videos:

Making Links
Udacity
53.9K views 21 likes 0 dislikes 23 Feb 2015100% match

Memcached - Web Development
Udacity
13.5K views 115 likes 3 dislikes 23 Feb 2015100% match

Port - Web Development
Udacity
15.8K views 18 likes 0 dislikes 23 Feb 2015100% match

Best Browser - Web Development
Udacity
14.9K views 7 likes 0 dislikes 23 Feb 2015100% match

More Handlers - Web Development
Udacity
9.1K views 9 likes 2 dislikes 22 Apr 2012100% match

Cache Architecture - Web Development
Udacity
7.2K views 16 likes 1 dislikes 27 May 2012100% match

Course Outline - Web Development
Udacity
46.2K views 169 likes 0 dislikes 23 Feb 2015100% match

Web Applications - Web Development
Udacity
19.5K views 59 likes 4 dislikes 02 Jun 2014100% match

Best Browser Solution - Web Development
Udacity
9.6K views 22 likes 1 dislikes 23 Feb 2015100% match

Most Common Method - Web Development
Udacity
9.7K views 5 likes 0 dislikes 23 Feb 2015100% match

Precomputed Caching - Web Development
Udacity
12.2K views 80 likes 0 dislikes 27 May 2012100% match

Shopping List Take 1 - Web Development
Udacity
841 views 1 likes 0 dislikes 23 Feb 2015100% match

Caching - Web Development
Udacity
12.1K views 102 likes 0 dislikes 23 Feb 2015100% match

Missing End Tag
Udacity
43K views 15 likes 1 dislikes 23 Feb 2015100% match

User Input - Web Development
Udacity
7.7K views 3 likes 0 dislikes 22 Apr 2012100% match

Query Parameters - Web Development
Udacity
22.6K views 78 likes 3 dislikes 23 Feb 2015100% match

Part 2 - Web Development
Udacity
643 views 2 likes 0 dislikes 07 May 2012100% match

Valid Headers - Web Development
Udacity
7.9K views 1 likes 0 dislikes 23 Feb 2015100% match

Caching Techniques - Web Development
Udacity
34.4K views 216 likes 7 dislikes 23 Feb 2015100% match

Stateless - Web Development
Udacity
9.2K views 35 likes 8 dislikes 23 Feb 2015100% match

World Wide Web Solution - Web Development
Udacity
12.6K views 14 likes 0 dislikes 23 Feb 2015100% match

Document Structure
Udacity
7.2K views 24 likes 1 dislikes 23 Feb 2015100% match

File Types Solution - Web Development
Udacity
9.9K views 9 likes 0 dislikes 23 Feb 2015100% match

Frameworks - Web Development
Udacity
28.7K views 154 likes 25 dislikes 23 Feb 2015100% match

Security - Web Development
Udacity
5.7K views 64 likes 0 dislikes 23 May 2012100% match

Datastore Types Solution - Web Development
Udacity
656 views 1 likes 0 dislikes 25 Apr 2012100% match

Introducing URLs - Web Development
Udacity
7.1K views 21 likes 0 dislikes 23 Feb 2015100% match

URL Encoding - Web Development
Udacity
13.7K views 17 likes 13 dislikes 22 Apr 2012100% match

Scaling Databases - Web Development
Udacity
64.3K views 795 likes 7 dislikes 25 Apr 201262% match

Reddit Architecture - Web Development
Udacity
27.7K views 397 likes 3 dislikes 27 May 201262% match

Settings Privacy About Contact Donate