Dart

Example: Http.CloseAllConnections method

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Demonstrates how to call the CloseAllConnections method. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final http = CkHttp();

  // Demonstrate 
  final url = 'https://finnhub.io/api/v1/quote?symbol={\$symbol}&token={\$api_key}';

  // When the request is sent, the {$symbol} is replaced with "MSFT"
  // and the {$api_key} is replaced with "1234567890ABCDEF"
  http.setUrlVar('symbol', 'MSFT');
  http.setUrlVar('api_key', '1234567890ABCDEF');

  final sbJson = CkStringBuilder();
  try {
    http.quickGetSb(url, sbJson);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final statusCode = http.lastStatus;
  print(http.lastResponseHeader);

  // The response header contains this:

  // Date: Tue, 19 Aug 2025 12:18:56 GMT
  // Content-Type: application/json; charset=utf-8
  // Transfer-Encoding: chunked
  // Connection: keep-alive
  // Content-Encoding: gzip

  // The "Connection: keep-alive" header ensures the server keeps the connection open for subsequent requests.
  // If the server responds with a "Connection: close" header, it indicates the connection will be closed after the response. 
  // Consequently, Chilkat will also close the connection, requiring a new one to be established for any subsequent requests to the same server.

  // If your application uses the same HTTP object instance to send requests to a different server, a new connection will be established with that server.
  // Existing connections remain open, with Chilkat maintaining up to 10 open connections. 
  // If all 10 connections are in use, Chilkat will close the least recently used connection to connect to a new server.

  // Your application can explicitly close all open connections like this:
  try {
    http.closeAllConnections();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Success.');
}