# File lib/action_dispatch/http/cache.rb, line 21 def etag_matches?(etag) if_none_match && if_none_match == etag end
Check response freshness (Last-Modified and ETag) against request If-Modified-Since and If-None-Match conditions. If both headers are supplied, both must match, or the request is not considered fresh.
# File lib/action_dispatch/http/cache.rb, line 28 def fresh?(response) last_modified = if_modified_since etag = if_none_match return false unless last_modified || etag success = true success &&= not_modified?(response.last_modified) if last_modified success &&= etag_matches?(response.etag) if etag success end
# File lib/action_dispatch/http/cache.rb, line 7 def if_modified_since if since = env['HTTP_IF_MODIFIED_SINCE'] Time.rfc2822(since) rescue nil end end
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