private function stream_body( $handle, $data ) {
		if ( @function_exists( 'mb_internal_encoding' ) && ((int) @ini_get( 'mbstring.func_overload' )) & 2)
		{
		  $mbEncoding = mb_internal_encoding();
		  mb_internal_encoding( 'ISO-8859-1' );
		}
		if ( $this->max_body_length && ( strlen( $this->body ) + strlen( $data ) ) > $this->max_body_length )
			$data = substr( $data, 0, ( $this->max_body_length - strlen( $this->body ) ) );

		if ( $this->stream_handle )
			fwrite( $this->stream_handle, $data );
		else
			$this->body .= $data;

		$data_len = strlen( $data );
		if ( isset( $mbEncoding ) )
		{
		  mb_internal_encoding( $mbEncoding );
		}

		return $data_len;
	}