My book makes an example where the first line of the HTTP response is:
HTTP/1.1 200 OK
Then there is a table where explains all the codes, and 200 is equal to 'OK'.
Then what is the 'OK' useful for, and why is there this redundancy?
closed as off topic by Chris S♦ Jan 8 '13 at 18:00
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It means exactly what it says in RFC 2616, which you should have read: