POST Method in CGI

GET Method in CGI

The POST method in CGI Python scripts is a way to send data to a web server and is commonly used to submit form data or other information from a client to a server.

Talking about the POST method , as it is said it’s a HTTP request method which is used for sending data to the server , as GET method append data to the URL while the POST method sends data in the body of the HTTP request , that is the reason that’s why POST method is suitable for transmitting large quantity of data, and also POST method is used for operations which the the server state, by submitting form, uploading files and by any other data modifying activity. POST method is also one of the HTTP request method which is used for submitting data to a web server. The data sent is basically processed to create, update or modify resources on the server. It is one of the primary ways through which web forms, login pages and other interactive elements on website, send data to the server.

Example

GetFile.html: This HTML document is a simple web page that contains a form. The form is designed to gather user information, specifically a username and an email address. When a user fills in these details and clicks the “Submit” button, the form data will be sent to a Python script named “File.py” using the HTTP POST method. The page’s title is set as “CGI,” and the character encoding is specified as UTF-8 to ensure proper text display.

HTML

<!DOCTYPE html>
<html>
   <head>
       <meta charset="UTF-8">
       <title> CGI </title>
   </head>
 
   <body>
        <form action="File.py" method="post">
            Username: <input type="text" name="username" />
             
            <br />
 
            Email Address: <input type="email" name="emailaddress" />
 
            <input type="submit" value="Submit" />
        </form>
   </body>
</html>

Output

GetFile.html

File.py: The script does four main things. First, it gets information that someone entered into a form on a web page, like their username and email. Second, it creates a special web page (HTML) to show as a response to the person who used the form. Third, it puts the user’s information on this web page along with a title and a message. Finally, it starts by saying which version of Python to use and brings in some tools (modules) for working with web forms and for debugging.

Python3

#!C:\Python311\python.exe
 
import cgi, cgitb
 
form = cgi.FieldStorage()
 
username = form["username"].value
emailaddress = form["emailaddress"].value
 
print("Content-type:text/html\r\n\r\n")
 
print("<html>")
print("<head>")
print("<title> MY FIRST CGI FILE </title>")
print("</head>")
print("<body>")
print("<h3> This is HTML's Body Section </h3>")
print(username)
print(emailaddress)
print("</body>")
print("</html>")

Output:

File.py

GET and POST in Python CGI

In this article, we will explore the GET and POST methods in CGI. In Python, the Common Gateway Interface (CGI) plays an important role as it enables and helps in the creation of dynamic web pages. It basically allows Python scripts to be executed and run on a web server in response to a client’s HTTP request. if you are learning networking for the first time or if you are working on a REST API, you might be familiar with the concept of different HTTP methods. HTTP stands for ‘Hypertext Transfer Protocol,’ and it has no properties. The web operates based on these protocols. For example, we have famous HTTP methods like GET and POST. so let’s see what is GET and POST methods are in CGI.

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