diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/http/cache.rb')
-rw-r--r-- | actionpack/lib/action_dispatch/http/cache.rb | 42 |
1 files changed, 27 insertions, 15 deletions
diff --git a/actionpack/lib/action_dispatch/http/cache.rb b/actionpack/lib/action_dispatch/http/cache.rb index 7d83ecb058..5ee4c044ea 100644 --- a/actionpack/lib/action_dispatch/http/cache.rb +++ b/actionpack/lib/action_dispatch/http/cache.rb @@ -4,14 +4,18 @@ module ActionDispatch module Http module Cache module Request + + HTTP_IF_MODIFIED_SINCE = 'HTTP_IF_MODIFIED_SINCE'.freeze + HTTP_IF_NONE_MATCH = 'HTTP_IF_NONE_MATCH'.freeze + def if_modified_since - if since = env['HTTP_IF_MODIFIED_SINCE'] + if since = env[HTTP_IF_MODIFIED_SINCE] Time.rfc2822(since) rescue nil end end def if_none_match - env['HTTP_IF_NONE_MATCH'] + env[HTTP_IF_NONE_MATCH] end def not_modified?(modified_at) @@ -43,17 +47,17 @@ module ActionDispatch alias :etag? :etag def last_modified - if last = headers['Last-Modified'] + if last = headers[LAST_MODIFIED] Time.httpdate(last) end end def last_modified? - headers.include?('Last-Modified') + headers.include?(LAST_MODIFIED) end def last_modified=(utc_time) - headers['Last-Modified'] = utc_time.httpdate + headers[LAST_MODIFIED] = utc_time.httpdate end def date @@ -72,16 +76,20 @@ module ActionDispatch def etag=(etag) key = ActiveSupport::Cache.expand_cache_key(etag) - @etag = self["ETag"] = %("#{Digest::MD5.hexdigest(key)}") + @etag = self[ETAG] = %("#{Digest::MD5.hexdigest(key)}") end private + LAST_MODIFIED = "Last-Modified".freeze + ETAG = "ETag".freeze + CACHE_CONTROL = "Cache-Control".freeze + def prepare_cache_control! @cache_control = {} - @etag = self["ETag"] + @etag = self[ETAG] - if cache_control = self["Cache-Control"] + if cache_control = self[CACHE_CONTROL] cache_control.split(/,\s*/).each do |segment| first, last = segment.split("=") @cache_control[first.to_sym] = last || true @@ -95,28 +103,32 @@ module ActionDispatch end end - DEFAULT_CACHE_CONTROL = "max-age=0, private, must-revalidate" + DEFAULT_CACHE_CONTROL = "max-age=0, private, must-revalidate".freeze + NO_CACHE = "no-cache".freeze + PUBLIC = "public".freeze + PRIVATE = "private".freeze + MUST_REVALIDATE = "must-revalidate".freeze def set_conditional_cache_control! - return if self["Cache-Control"].present? + return if self[CACHE_CONTROL].present? control = @cache_control if control.empty? - headers["Cache-Control"] = DEFAULT_CACHE_CONTROL + headers[CACHE_CONTROL] = DEFAULT_CACHE_CONTROL elsif control[:no_cache] - headers["Cache-Control"] = "no-cache" + headers[CACHE_CONTROL] = NO_CACHE else extras = control[:extras] max_age = control[:max_age] options = [] options << "max-age=#{max_age.to_i}" if max_age - options << (control[:public] ? "public" : "private") - options << "must-revalidate" if control[:must_revalidate] + options << (control[:public] ? PUBLIC : PRIVATE) + options << MUST_REVALIDATE if control[:must_revalidate] options.concat(extras) if extras - headers["Cache-Control"] = options.join(", ") + headers[CACHE_CONTROL] = options.join(", ") end end end |