Fix: Socket Support on Web

[14h4i]

I modified ssh_socket_js.dart and it maybe work for web.

However, I am having problems in:

dartssh2/lib/src/ssh_transport.dart

Lines 635 to 648 in ae54479

	void _handleMessage(Uint8List message) {
	final messageId = SSHMessage.readMessageId(message);
	switch (messageId) {
	case SSH_Message_KexInit.messageId:
	return _handleMessageKexInit(message);
	case SSH_Message_KexDH_Reply.messageId:
	case SSH_Message_KexDH_GexReply.messageId:
	return _handleMessageKexReply(message);
	case SSH_Message_NewKeys.messageId:
	return _handleMessageNewKeys(message);
	default:
	onPacket?.call(message);
	}
	}

and

dartssh2/lib/src/ssh_client.dart

Lines 489 to 533 in ae54479

	void _dispatchMessage(Uint8List message) {
	final messageId = SSHMessage.readMessageId(message);
	switch (messageId) {
	case SSH_Message_Service_Accept.messageId:
	return _handleServiceAccept(message);
	case SSH_Message_Userauth_Success.messageId:
	return _handleUserauthSuccess();
	case SSH_Message_Userauth_Failure.messageId:
	return _handleUserauthFailure(message);
	case SSH_Message_Userauth_Passwd_ChangeReq.messageId:
	return _handleUserauthIntermidiate(message);
	case SSH_Message_Userauth_Banner.messageId:
	return _handleUserauthBanner(message);
	case SSH_Message_Global_Request.messageId:
	return _handleGlobalRequest(message);
	case SSH_Message_Request_Success.messageId:
	return _handleGlobalRequestSuccess(message);
	case SSH_Message_Request_Failure.messageId:
	return _handleGlobalRequestFailure(message);
	case SSH_Message_Channel_Open.messageId:
	return _handleChannelOpen(message);
	case SSH_Message_Channel_Confirmation.messageId:
	return _handleChannelConfirmation(message);
	case SSH_Message_Channel_Open_Failure.messageId:
	return _handleChannelOpenFailure(message);
	case SSH_Message_Channel_Window_Adjust.messageId:
	return _handleChannelWindowAdjust(message);
	case SSH_Message_Channel_Success.messageId:
	return _handleChannelSuccess(message);
	case SSH_Message_Channel_Failure.messageId:
	return _handleChannelFailure(message);
	case SSH_Message_Channel_Data.messageId:
	return _handleChannelData(message);
	case SSH_Message_Channel_Extended_Data.messageId:
	return _handleChannelExtendedData(message);
	case SSH_Message_Channel_EOF.messageId:
	return _handleChannelEOF(message);
	case SSH_Message_Channel_Close.messageId:
	return _handleChannelClose(message);
	case SSH_Message_Channel_Request.messageId:
	return _handleChannelRequest(message);
	default:
	printDebug?.call('unknown messageId: $messageId');
	}
	}

When run web with after modified, there is a case messageId return with value 30 and it seems that the case has not been handled. It caused the code to stop, when use SSHClient.shell :

dartssh2/lib/src/ssh_client.dart

Line 338 in ae54479

await _authenticated.future;

@xtyxtyx Can you help me to handle it. I don't know the logic of this part code.