how to send encrypted (3DES) data into aqueduct without getting any error?

[Niyazi Toros]

Updated: new question: how to send encrypted (3DES) data into aqueduct without getting any error?

Hi,

I am new to Dart, Aqueduct and socket. I am trying to learn all while I am working and making test project to understand. Any deep info and help appreciated.

Below code works for me as I expected in aqueduct. Problem is that I need to modify value before sending a socket, so I need to await like this. "await for (var data in socket)" Also I have some heavy work in 2 places. First I need to decrypt the request before sending to socket "socket.write('$tempData\r\n');".

Once I get a data from socket (listen) "await for (var data in socket)" I need to do some heavy work again before sending as response.

I had a 3 question that shown below.

Question-1: How to catch error if serevr is not reachable or down?

Question-2: How to catch error when trying send data to socket?

Question-3: How to catch error while socket listen returning data?

import 'package:aqueduct/aqueduct.dart';
import 'package:niyaziapi/niyaziapi.dart';
import 'package:niyaziapi/util/niyaziprivate.dart';

class LoginController extends Controller {
 @override
 Future<RequestOrResponse> processRequest(Request request) async {
 if (request.path.variables.containsKey('value')) {
 var _xPrivate = (request.path.variables['value']).trim();
 var tempData = await getPrivate(_xPrivate); 

 // TODO: Question-1: How to catch error if serevr is not reachable or down
 var socket = await Socket.connect('192.168.1.22', 1024);
 print("socket: $socket");

 // TODO: Question-2: How to catch error when trying send data to socket
 socket.write('$tempData\r\n');

 // TODO: Question-3: How to catch error while socket listen (returning data)has error 
 await for (var data in socket) {
 var reply = new String.fromCharCodes(data).trim();
 // Do some heavy work in here then
 return new Response.ok("$reply");
 }
 } else {
 return new Response.ok("wrong rquest");
 }
 }

 Future<String> getPrivate(_xPrivate) async {
 // Do some heavy decryption in here then

 return "data";
 }
}


UPDATE:

when I testing I found that my code works. Only reason that I am sending 3DES data and has + and / character in it.
If you look at closely in first request, there is a + and / character in data which give me an error. /login/ziD7v0Ul99vmNWnxJRxZIiTY4zakNoq8GjM+oHROYz/YTHnd3NH1XfHRULY0jaHU 19ms 404 
on the other hand if I remove those character than I get perfect response.
/login/ziD7v0Ul99vmNWnxJRxZIiTY4zakNoq8GjMoHROYzYTHnd3NH1XfHRULY0jaHU 13 ms 200
So, question comes how to send encrypted (3DES) data into aqueduct without getting any error?

[Niyazi Toros]

Going to Like Aqueduct twice :)

It was very simple: 

var _xPrivate = (request.path.variables['value']).trim(); change to:

var _xPrivate = request.path.remainingPath;
print("request: $_xPrivate");