module OpenURI::Meta

Mixin for holding meta-information.

Attributes

base_uri[RW]

returns a URI that is the base of relative URIs in the data. It may differ from the URI supplied by a user due to redirection.

meta[R]

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.

metas[R]

returns a Hash that represents header fields. The Hash keys are downcased for canonicalization. The Hash value are an array of field values.

status[RW]

returns an Array that consists of status code and message.

Public Instance Methods

charset() { || ... } click to toggle source

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.

# File lib/open-uri.rb, line 529
def charset
  type, *parameters = content_type_parse
  if pair = parameters.assoc('charset')
    pair.last.downcase
  elsif block_given?
    yield
  elsif type && %r{\Atext/} =~ type &&
        @base_uri && /\Ahttp\z/i =~ @base_uri.scheme
    "iso-8859-1" # RFC2616 3.7.1
  else
    nil
  end
end

content_encoding() click to toggle source

Returns a list of encodings in Content-Encoding field as an array of strings.

The encodings are downcased for canonicalization.

# File lib/open-uri.rb, line 547
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

content_type() click to toggle source

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

# File lib/open-uri.rb, line 514
def content_type
  type, *_ = content_type_parse
  type || 'application/octet-stream'
end

last_modified() click to toggle source

returns a Time that represents the Last-Modified field.

# File lib/open-uri.rb, line 476
def last_modified
  if vs = @metas['last-modified']
    v = vs.join(', ')
    Time.httpdate(v)
  else
    nil
  end
end