Enumerate REST Response Header Names

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Demonstrates Rest.ResponseHdrName, which returns the field name of the response header at a zero-based index. The example enumerates all headers, pairing each name with its value.

import 'package:chilkat/chilkat.dart';

void main() {
  final rest = CkRest();
  final bTls = true;
  final bAutoReconnect = true;
  try {
    rest.connect('example.com', 443, bTls, bAutoReconnect);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    rest.sendReqNoBody('GET', '/api/items/123');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final statusCode = rest.readResponseHeader();
  if (statusCode < 0) {
    print(rest.lastErrorText);
    return;
  }

  // Enumerate the response header fields by zero-based index.  ResponseHdrName returns the field name
  // and ResponseHdrValue returns the value at the same index.
  final numHeaders = rest.numResponseHeaders;
  for (var i = 0; i < numHeaders; i++) {
    final String name;
    try {
      name = rest.responseHdrName(i);
    } on ChilkatException catch (e) {
      print(e.lastErrorText);
      return;
    }

    final String value;
    try {
      value = rest.responseHdrValue(i);
    } on ChilkatException catch (e) {
      print(e.lastErrorText);
      return;
    }

    print('$name: $value');
  }
}