Class: Mail::Parsers::ContentDispositionParser

Inherits:
Object
  • Object
show all
Includes:
Utilities
Defined in:
lib/mail/parsers/content_disposition_parser.rb

Constant Summary

Constants included from Mail::Patterns

Mail::Patterns::ATOM_UNSAFE, Mail::Patterns::CONTROL_CHAR, Mail::Patterns::CRLF, Mail::Patterns::FIELD_BODY, Mail::Patterns::FIELD_LINE, Mail::Patterns::FIELD_NAME, Mail::Patterns::FIELD_PREFIX, Mail::Patterns::FIELD_SPLIT, Mail::Patterns::FWS, Mail::Patterns::HEADER_LINE, Mail::Patterns::HEADER_SPLIT, Mail::Patterns::PHRASE_UNSAFE, Mail::Patterns::QP_SAFE, Mail::Patterns::QP_UNSAFE, Mail::Patterns::TEXT, Mail::Patterns::TOKEN_UNSAFE, Mail::Patterns::WSP

Instance Method Summary collapse

Methods included from Utilities

#atom_safe?, #bracket, #capitalize_field, #constantize, #dasherize, #dquote, #escape_paren, #map_lines, #map_with_index, #match_to_s, #paren, #quote_atom, #quote_phrase, #quote_token, #token_safe?, #unbracket, #underscoreize, #unparen, #unquote, #uri_escape, #uri_parser, #uri_unescape

Instance Method Details

#parse(s) ⇒ Object 



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# File 'lib/mail/parsers/content_disposition_parser.rb', line 5

def parse(s)
  content_disposition = ContentDispositionStruct.new("", nil)
  if s.blank?
    return content_disposition
  end

  actions, error = Ragel.parse(:content_disposition, s)
  if error
    raise Mail::Field::ParseError.new(Mail::ContentDispositionElement, s, error)
  end

  content_disposition.parameters = []

  disp_type_s = param_attr_s = param_attr = qstr_s = qstr = param_val_s = nil
  actions.each_slice(2) do |action_id, p|
    action = Mail::Parsers::Ragel::ACTIONS[action_id]
    case action

    # Disposition Type
    when :disp_type_s then disp_type_s = p
    when :disp_type_e
      content_disposition.disposition_type = s[disp_type_s..(p-1)].downcase

    # Parameter Attribute
    when :param_attr_s then param_attr_s = p
    when :param_attr_e then param_attr = s[param_attr_s..(p-1)]

    # Quoted String.
    when :qstr_s then qstr_s = p
    when :qstr_e then qstr = s[qstr_s..(p-1)]

    # Parameter Value
    when :param_val_s then param_val_s = p
    when :param_val_e
      if param_attr.nil?
        raise Mail::Field::ParseError.new(Mail::ContentDispositionElement, s, "no attribute for value")
      end

      # Use quoted string value if one exists, otherwise use parameter value
      if qstr
        value = qstr
      else
        value = s[param_val_s..(p-1)]
      end

      content_disposition.parameters <<  { param_attr => value }
      param_attr = nil
      qstr = nil

    else
      raise Mail::Field::ParseError.new(Mail::ContentDispositionElement, s, "Failed to process unknown action: #{action}")
    end
  end

  content_disposition
end