How can I convert string to utf8 in Dart?

问题

I am using aqueduct web api framework to support my flutter app. In my api backend I need to connect local network socket services. My problem is that I can't return the exact string (in tr). So, How can I convert string to utf8 in Dart?

Example:

@httpGet
Future<Response> getLogin() async {
  Socket.connect('192.168.1.22’, 1024).then((socket) async {
    socket.listen((data) {
      // Expected return is: 1:_:2:_:175997:_:NİYAZİ TOROS
      print(new String.fromCharCodes(data).trim());
      xResult = new String.fromCharCodes(data).trim();
      print("xResult: $xResult");
    }, onDone: () {
      print("Done");
      socket.destroy();
    });

    socket.write('Q101:_:49785:_:x\r\n');
  });

  return new Response.ok(xResult);
}

The return is not in TR-tr language format.

Return text looks like: 1::2::175997:_:NÝYAZÝ TOROS

Correct must be: 1::2::175997:_:NİYAZİ TOROS

UPDATE:

xResult = new String.fromCharCodes(data).trim();
print(xResult);
responseBody = xResult.transform(utf8.decoder);
print(responseBody);

I can print the xResult but cannot print the responseBody after trying convert to UTF8

回答1:

import 'dart:convert' show utf8;

var encoded = utf8.encode('Lorem ipsum dolor sit amet, consetetur...');
var decoded = utf8.decode(encoded);

See also https://api.dartlang.org/stable/1.24.3/dart-convert/UTF8-constant.html

There are also encoder and decoder to be used with streams

File.openRead().transform(utf8.decoder).

See also https://www.dartlang.org/articles/libraries/converters-and-codecs#converter

来源：https://stackoverflow.com/questions/51101471/how-can-i-convert-string-to-utf8-in-dart

标签

sockets

dart

converter

aqueduct