Thursday, 5 December 2013

Significance of User-Agent Field: Detection of Automated/Programatic HTTP Requests....!

Suppose you request a webpage using a program, say a Python script. Have you ever wondered whether a web server can differentiate it from a manual request by a user via a web browser, say Firefox. Yes it is possible for the web server to differentiate using various methods. One such method is analyzing the value of the 'User-Agent' field in the HTTP request header from the client.

You can see the difference from the output of the following Python script:

The output of the above script is:

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