What takes precedence: the ETag or Last-Modified HTTP header?

user_101442 0
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For two subsequent requests, which of the following two headers is given more weight by browsers should one of them change: ETag or Last-Modified?

last-modified etag caching http
3 Answers

Isn't it more like an "OR" expression. In pseudo code:

if ETagFromServer != ETagOnClient || LastModifiedFromServer != LastModifiedOnClient
   GetFromServer
else
   GetFromCache
user_820040
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