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Dart

Receive Text from a Socket into a StringBuilder

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveSb, which receives text, decodes it using StringCharset, and appends it to a StringBuilder.

Background. Text send and receive operations encode and decode bytes using the StringCharset property. For plain ASCII or UTF-8 protocols, setting StringCharset to utf-8 is a safe default.

Chilkat Dart Downloads

Dart
import 'package:chilkat/chilkat.dart';

void main() {
  final socket = CkSocket();

  // Connect to the server using TLS.  The 3rd argument enables the TLS handshake after the TCP
  // connection succeeds; the 4th is the maximum time to wait, in milliseconds.
  final bTls = true;
  final maxWaitMs = 5000;
  try {
    socket.connect('example.com', 5000, bTls, maxWaitMs);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // StringCharset controls the character encoding used when sending and receiving text.
  socket.stringCharset = 'utf-8';
  // Send a request using a simple application-defined text protocol in which each message ends with a
  // CRLF.
  final command = 'STATUS\r\n';
  try {
    socket.sendString(command);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Receive text and append it to a StringBuilder, decoding using StringCharset.
  final sb = CkStringBuilder();
  try {
    socket.receiveSb(sb);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final String responseText;
  try {
    responseText = sb.getAsString();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(responseText);
}