OpenURI::Meta (Module)

In: open-uri.rb

Mixin for holding meta-information.

Constants

RE_LWS = /[\r\n\t ]+/n
RE_TOKEN = %r{[^\x00- ()<>@,;:\\"/\[\]?={}\x7f]+}n
RE_QUOTED_STRING = %r{"(?:[\r\n\t !#-\[\]-~\x80-\xff]|\\[\x00-\x7f])"}n
RE_PARAMETERS = %r{(?:;#{RE_LWS}?#{RE_TOKEN}#{RE_LWS}?=#{RE_LWS}?(?:#{RE_TOKEN}|#{RE_QUOTED_STRING})#{RE_LWS}?)*}n

Attributes

base_uri  [RW]  returns a URI which is base of relative URIs in the data. It may differ from the URI supplied by a user because redirection.
meta  [R]  returns a Hash which represents header fields. The Hash keys are downcased for canonicalization.
status  [RW]  returns an Array which consists status code and message.

Public Instance methods

charset() {|| ...}

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 HTTP. In that case, "iso-8859-1" is returned as defined by RFC2616 3.7.1.

[Source]

# File open-uri.rb, line 318
    def charset
      type, *parameters = content_type_parse
      if pair = parameters.assoc('charset')
        pair.last.downcase
      elsif block_given?
        yield
      elsif type && %{\Atext/} =~ type &&
            @base_uri && /\Ahttp\z/i =~ @base_uri.scheme
        "iso-8859-1" # RFC2616 3.7.1

      else
        nil
      end
    end
content_encoding()

returns a list of encodings in Content-Encoding field as an Array of String. The encodings are downcased for canonicalization.

[Source]

# File open-uri.rb, line 335
    def content_encoding
      v = @meta['content-encoding']
      if v && %{\A#{RE_LWS}?#{RE_TOKEN}#{RE_LWS}?(?:,#{RE_LWS}?#{RE_TOKEN}#{RE_LWS}?)*}o =~ v
        v.scan(RE_TOKEN).map {|content_coding| content_coding.downcase}
      else
        []
      end
    end
content_type()

returns "type/subtype" which is MIME Content-Type. It is downcased for canonicalization. Content-Type parameters are stripped.

[Source]

# File open-uri.rb, line 303
    def content_type
      type, *parameters = content_type_parse
      type || 'application/octet-stream'
    end
last_modified()

returns a Time which represents Last-Modified field.

[Source]

# File open-uri.rb, line 270
    def last_modified
      if v = @meta['last-modified']
        Time.httpdate(v)
      else
        nil
      end
    end

[Validate]