How to use GET and POST methods

This article mainly explains "how to use GET and POST methods". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to use GET and POST methods".

GET and POST methods

The browser client passes information to the server in two ways: the GET method and the POST method.

Using the GET method to transfer data

The GET method sends the encoded user information to the server, and the data information is contained on the URL of the request page to "?" Number division, as follows:

Http://www.test.com/cgi-bin/hello.py?key1=value1&key2=value2

Some other comments about the GET request:

GET requests can be cached

GET requests are kept in the browser history

GET requests can be collected as bookmarks

GET requests should not be used when processing sensitive data

GET request has a length limit

GET requests should only be used to retrieve data

Simple url example: GET method

Here is a simple URL that uses the GET method to send two parameters to the hello_get.py program:

/ cgi-bin/test.py?name=&url= http://www.yisu.com

The following is the code for the hello_get.py file:

#! / usr/bin/python3

# CGI processing module

Import cgi, cgitb

# create instantiation of FieldStorage

Form = cgi.FieldStorage ()

# get data

Site_name = form.getvalue ('name')

Site_url = form.getvalue ('url')

Print ("Content-type:text/html")

Print ()

Print ("")

Print ("")

Print ("")

Print ("CGI Test instance")

Print ("")

Print ("")

Print ("% s official website:% s"% (site_name, site_url))

Print ("")

Print ("")

Modify the hello_get.py after the file is saved, and modify the file permission to 755:

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