Course Content

  • StatusCodeErrorDemo

Course Content


HTTP response status codes:

  • Informational responses ( 100 – 199 )
  • Successful responses ( 200 – 299 )
  • Redirection messages ( 300 – 399 )
  • Client error responses ( 400 – 499 )
  • Server error responses ( 500 – 599 )

The Status-Code element in a server response is a three-digit integer, with the first digit defining the response class and the remaining two digits serving no categorization function. S.N. Code and Description are two of the five possible values for the first digit.

The HTTP 204 No Content success status code indicates that a request was successful but that the client does not need to leave the current page. This could be used, for example, when a wiki site's "save and continue editing" feature is implemented.

The response status code 404 Not Found indicates that the server was unable to locate the requested resource. Broken or dead links that lead to a 404 page are known as broken or dead links, and they are vulnerable to link rot. A 404 status code just shows that the resource is unavailable, not whether it is temporarily or permanently unavailable.

In RFC1945, 16 status codes are defined (the HTTP 1.0 specification). Pragmatism was the driving force behind these status codes. Web browsers are generic in the sense that they can communicate with any web server.

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