Method: BlueFeather::Document.parse_io

Defined in:

lib/bluefeather.rb

.parse_io(input, default_enc = EncodingType::UTF8) ⇒ Object

# File 'lib/bluefeather.rb', line 200

def parse_io(input, default_enc = EncodingType::UTF8)
  headers = {}
  body = nil
  first_pos = input.pos
  
  Util.change_kcode(EncodingType.type_to_kcode(default_enc)){
    # default encoding

    if defined?(Encoding) then
      input.set_encoding(Encoding.find(default_enc))
    end
    
    
    
    # get headers

    pos_before_gets = nil
    first_line = true

    loop do
      pos_before_gets = input.pos
      line = input.gets
      
      # cut UTF-8 BOM

      if first_line and line =~ UTF8_BOM_PATTERN then
        line.slice!(UTF8_BOM_PATTERN)
      end  
      first_line = false
      
      if line and line.chomp =~ HEADER_PATTERN then
        key = $1.downcase; value = $2
        
        if key == 'encoding' and not headers.include?('encoding') then
          kc = EncodingType.type_to_kcode(value.downcase)
          if input.respond_to?(:set_encoding) then
            input.set_encoding(value.downcase)
            
            # rewind (reason => [ruby-list:45988])

            input.pos = first_pos
            first_line = true
          else
            $KCODE = kc
          end
        end
        
        headers[key] = value
      else
        # EOF or Metadata end

        break
      end
    end
    
    # back

    input.pos = pos_before_gets
    
    
    
    # skip blank lines

    loop do
      pos_before_gets = input.pos

      line = input.gets
      if line.nil? or not line =~ BLANK_LINE_PATTERN then
        break
      end
    end
    
    # back

    input.pos = pos_before_gets
    
    
    
    # get body

    body = input.read

  }
  
  
  return self.new(headers, body)
end