Dart

Explaining the Rest ClearResponseBodyStream Method

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The ClearResponseBodyStream method would be needed if your applicaiton called SetResponseBodyStream to send the response to a stream for one request, but then wants to subsequently do something else. The application must call ClearResponseBodyStream to no longer send responses to the stream. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  var success = false;

  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final rest = CkRest();

  // Connect to the web server
  final bTls = true;
  final port = 443;
  final bAutoReconnect = true;
  try {
    rest.connect('www.chilkatsoft.com', port, bTls, bAutoReconnect);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Setup a file stream for the download
  final fileStream = CkStream();
  fileStream.sinkFile = 'qa_output/starfish.jpg';

  // Indicate that the call to FullRequestNoBody should send the response body
  // to fileStream if the response status code is 200.
  // If a non-success response status code is received, then nothing
  // is streamed to the output file and the error response is returned by FullRequestNoBody.
  final expectedStatus = 200;
  rest.setResponseBodyStream(expectedStatus, true, fileStream);

  var responseStr = '';
  try {
    responseStr = rest.fullRequestNoBody('GET', '/images/starfish.jpg');
  } on ChilkatException {
    // Examine the request/response to see what happened.
    print('response status code = ${rest.responseStatusCode}');
    print('response status text = ${rest.responseStatusText}');
    print('response header: ${rest.responseHeader}');
    print('response body (if any): $responseStr');
    print('---');
    print('LastRequestStartLine: ${rest.lastRequestStartLine}');
    print('LastRequestHeader: ${rest.lastRequestHeader}');
    return;
  }

  print('downloaded starfish.jpg');

  // Clear the response body stream previously set in the call to SetResponseBodyStream.
  rest.clearResponseBodyStream();

  // Download something else, but this time send the response body to bd.
  final bd = CkBinData();
  try {
    rest.fullRequestNoBodyBd('GET', '/images/penguins.jpg', bd);
  } on ChilkatException {
    // Examine the request/response to see what happened.
    print('response status code = ${rest.responseStatusCode}');
    print('response status text = ${rest.responseStatusText}');
    print('response header: ${rest.responseHeader}');
    print('response body (if any): ${bd.getString('utf-8')}');
    print('---');
    print('LastRequestStartLine: ${rest.lastRequestStartLine}');
    print('LastRequestHeader: ${rest.lastRequestHeader}');
    return;
  }

  // Save the contents of bd to a file.
  success = true;
  try {
    bd.writeFile('qa_output/penguins.jpg');
  } on ChilkatException {
    success = false;
  }

  print('Success: $success');
}