Mixin for holding meta-information.
returns a Hash that represents header fields. The Hash keys are downcased for canonicalization. The Hash values are a field body. If there are multiple field with same field name, the field values are concatenated with a comma.
returns a charset parameter in Content-Type field. It is downcased for canonicalization.
If charset parameter is not given but a block is given, the block is called and its result is returned. It can be used to guess charset.
If charset parameter and block is not given, nil is returned except text type. In that case, “utf-8” is returned as defined by RFC6838 4.2.1
# File open-uri.rb, line 534 def charset type, *parameters = content_type_parse if pair = parameters.assoc('charset') pair.last.downcase elsif block_given? yield elsif type && %r{\Atext/} =~ type "utf-8" # RFC6838 4.2.1 else nil end end
Returns a list of encodings in Content-Encoding field as an array of strings.
The encodings are downcased for canonicalization.
# File open-uri.rb, line 551 def content_encoding vs = @metas['content-encoding'] if vs && %r{\A#{RE_LWS}?#{RE_TOKEN}#{RE_LWS}?(?:,#{RE_LWS}?#{RE_TOKEN}#{RE_LWS}?)*}o =~ (v = vs.join(', ')) v.scan(RE_TOKEN).map {|content_coding| content_coding.downcase} else [] end end