Send a Staged REST Request with No Body

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Demonstrates Rest.SendReqNoBody, which sends a request without a body as the first step of the staged request model. After it succeeds, the response header and body are read separately.

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;
  }

  // Send a request without a request body.  This is a low-level send: after it succeeds, read the
  // response header and body separately.
  try {
    rest.sendReqNoBody('GET', '/api/items/123');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // After sending, read the response status line and header fields.  The return value is the HTTP
  // status code, or -1 if no response was received.
  final statusCode = rest.readResponseHeader();
  if (statusCode < 0) {
    print(rest.lastErrorText);
    return;
  }

  print('Response status code: $statusCode');

  // Read the response body as text.
  final String responseBody;
  try {
    responseBody = rest.readRespBodyString();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(responseBody);
}