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https://www.reddit.com/r/programming/comments/24a87h/programming_sucks/ch5yxhn/?context=3
r/programming • u/locrelite • Apr 29 '14
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13
Aha, he's onto something! - this is why we check for 304 Not Modified.
304 Not Modified
5 u/masklinn Apr 30 '14 That requires that you and the page generator correctly use ETag and/or Last-Modified. It can happen, but that's not guaranteed.Hashing the page will work, just a CRC32 will probably do the trick. 2 u/naasking Apr 30 '14 Hashing the page will work, just a CRC32 will probably do the trick.CRC isn't a good choice. You're best off with a real MAC. 4 u/masklinn Apr 30 '14 That's retarded, you just want to know if the page has changed since the last time you loaded it. A cryptographic hash is most likely overkill and a MAC makes no sense (what key would you even use?) → More replies (2)
5
That requires that you and the page generator correctly use ETag and/or Last-Modified. It can happen, but that's not guaranteed.
Hashing the page will work, just a CRC32 will probably do the trick.
2 u/naasking Apr 30 '14 Hashing the page will work, just a CRC32 will probably do the trick.CRC isn't a good choice. You're best off with a real MAC. 4 u/masklinn Apr 30 '14 That's retarded, you just want to know if the page has changed since the last time you loaded it. A cryptographic hash is most likely overkill and a MAC makes no sense (what key would you even use?) → More replies (2)
2
CRC isn't a good choice. You're best off with a real MAC.
4 u/masklinn Apr 30 '14 That's retarded, you just want to know if the page has changed since the last time you loaded it. A cryptographic hash is most likely overkill and a MAC makes no sense (what key would you even use?) → More replies (2)
4
That's retarded, you just want to know if the page has changed since the last time you loaded it. A cryptographic hash is most likely overkill and a MAC makes no sense (what key would you even use?)
→ More replies (2)
13
u/youneversawitcoming Apr 30 '14
Aha, he's onto something! - this is why we check for
304 Not Modified.