Python Network Programming Resources

Python Network - Status Codes

Quiz

After receiving and interpreting a request message, a server responds with an HTTP response message. The response message has a Status-Code. It is a 3-digit integer where first digit of the Status-Code defines the class of response and the last two digits do not have any categorization role. There are 5 values for the first digit:

Status Codes

S.N.	Code and Description
1	1xx: Informational It means the request was received and the process is continuing.
2	2xx: Success It means the action was successfully received, understood, and accepted.
3	3xx: Redirection It means further action must be taken in order to complete the request.
4	4xx: Client Error It means the request contains incorrect syntax or cannot be fulfilled.
5	5xx: Server Error It means the server failed to fulfill an apparently valid request.

Successful Response

In the below example we access a file from a url and the response is successful. So the status code returned is 200.

main.py

import urllib3
http = urllib3.PoolManager()

resp = http.request('GET', 'https://tutorialspoint.com/robots.txt')
print(resp.data)

# get the status of the response
print(resp.status)

Output

When we run the above program, we get the following output −

b'# This file is being served by CloudFront, please check listed behaviours.
...
Disallow: /listtutorials/
...
200

Unsuccessful Response

In the below example we access a file from a url which does not exist. The response is unsuccessful. So the status code returned is 404.

main.py

import urllib3
http = urllib3.PoolManager()

resp = http.request('GET', 'http://tutorialspoint.com/robot.txt')
print(resp.data)

# get the status of the response
print(resp.status)

Output

When we run the above program, we get the following output −

b'<...
<head>\n<title>404 Not Found</title>
...
404

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