HTTP method: get and post

HTTP:

HTTP is the foundation of data commnication of the World Wide Web. The basic work method of http is request and response.

There are two methods of HTTP request: Get and Post.

Get - get request data from specific source.
Post - Push data which will be dealed to specific source.

GET:

Note that the query string (name/value pairs) is sent in the URL of a GET request:

http://www.w3schools.com/tags/ref_httpmethods.asp

Some other notes on GET requests:

GET requests can be cached

GET requests remain in the browser history

GET requests can be bookmarked

GET requests should never be used when dealing with sensitive data

GET requests have length restrictions

GET requests should be used only to retrieve data

POST:

Note that the query string (name/value pairs) is sent in the HTTP message body of a POST request:

POST /test/demo_form.asp HTTP/1.1
Host: w3schools.com
name1=value1&name2=value2

Some other notes on POST requests:

POST requests are never cached

POST requests do not remain in the browser history

POST requests cannot be bookmarked

POST requests have no restrictions on data length

Compare GET vs. POST:

Tables	GET	POST
BACK button/Reload	Harmless	Data will be re-submitted
Bookmarked	can be bookmarked	Can not be bookmarked
Cached	Can be cached	Can not be cached
History	Parameters remain in browser history	Parameters are not saved in browser history
Restrictions on data length	Yes	No
Security	Less secure	Safer
Visibility	Visible	Not visible in URL