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Mobile Web Performance Optimization by S. Niranga

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HTTP 300, 400, and 500 codes

If you get a 3XX class of HTTP status code, it means that the user agent needs to take some additional actions to fulfill the request. The required action is fulfilled by the user agent without any involvement of the user, if and only if, the method used in the second request is HEAD or GET. A client needs to detect infinite redirection loops in the website because for each redirection, it will generate network traffic.

  • Receiving an HTTP 301 status code: An HTTP 301 status code specifies that requested resources by the user have permanently moved to another location. The HTTP response that carries this code needs to also include the new location, and the client should use this new URL the next time they try to get the ...

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