class PhusionPassenger::MessageChannel

def read_hash

goes wrong.
Might raise SystemCallError, IOError or SocketError when something

Returns nil when end-of-stream has been reached.
has an even number of elements.
result as a hash instead of an array. This assumes that the array message
Read an array message from the underlying file descriptor and return the 
def read_hash
	buffer = new_buffer
	if !@io.read(HEADER_SIZE, buffer)
		return nil
	end
	while buffer.size < HEADER_SIZE
		tmp = @io.read(HEADER_SIZE - buffer.size)
		if tmp.empty?
			return nil
		else
			buffer << tmp
		end
	end
	
	chunk_size = buffer.unpack(UINT16_PACK_FORMAT)[0]
	if !@io.read(chunk_size, buffer)
		return nil
	end
	while buffer.size < chunk_size
		tmp = @io.read(chunk_size - buffer.size)
		if tmp.empty?
			return nil
		else
			buffer << tmp
		end
	end
	
	result = {}
	offset = 0
	delimiter_pos = buffer.index(DELIMITER, offset)
	while !delimiter_pos.nil?
		if delimiter_pos == 0
			name = ""
		else
			name = buffer[offset .. delimiter_pos - 1]
		end
		
		offset = delimiter_pos + 1
		delimiter_pos = buffer.index(DELIMITER, offset)
		if delimiter_pos.nil?
			raise InvalidHashError
		elsif delimiter_pos == 0
			value = ""
		else
			value = buffer[offset .. delimiter_pos - 1]
		end
		
		result[name] = value
		offset = delimiter_pos + 1
		delimiter_pos = buffer.index(DELIMITER, offset)
	end
	return result
rescue Errno::ECONNRESET
	return nil
end