// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion bool autoUncompress
///  read / write
///  Get and set whether the body of a response will be automatically
///  uncompressed.
///
///  The body of an HTTP response can be compressed. In most situations providing
///  the un-compressed body is most convenient. Therefore the default behavior is
///  to un-compress the body. However in some situations (e.g. implementing a
///  transparent proxy) keeping the uncompressed stream is required.
///
///  NOTE: Headers in from the response is never modified. This means that when
///  automatic un-compression is turned on the value of the header Content-Length
///  will reflect the length of the original compressed body. Likewise the header
///  Content-Encoding will also have the original value indicating compression.
///
///  NOTE: Automatic un-compression is only performed if the Content-Encoding
///  header value is gzip.
///
///  This value affects all responses produced by this client after the value is
///  changed.
///  To disable, set to false.
///
///  Default is true.
/// @description Checks that headers in the response are never modified
/// @author sgrekhov@unipro.ru

import "dart:io";
import "dart:convert";
import "../../../Utils/expect.dart";

test() async {
  String helloWorld = 'Hello, test world!';
  HttpServer server = await HttpServer.bind(InternetAddress.loopbackIPv4, 0);
  server.autoCompress = true;

  asyncStart();
  server.listen((HttpRequest request) {
    request.response
      ..headers.set(HttpHeaders.contentLengthHeader, helloWorld.length)
      ..headers.set(HttpHeaders.contentEncodingHeader, "utf-8")
      ..write(helloWorld)
      ..close();
    server.close();
    asyncEnd();
  });

  asyncStart();
  HttpClient client = new HttpClient();
  client.autoUncompress = true;
  client
      .getUrl(Uri.parse(
      "http://${InternetAddress.loopbackIPv4.address}:${server.port}"))
      .then((HttpClientRequest request) {
    return request.close();
  }).then((HttpClientResponse response) {
    Expect.listEquals([helloWorld.length.toString()],
        response.headers[HttpHeaders.contentLengthHeader]);
    Expect.listEquals(["utf-8"], response.headers[HttpHeaders.contentEncodingHeader]);
    response.cast<List<int>>().transform(utf8.decoder).listen((content) {
      Expect.equals(helloWorld, content);
      asyncEnd();
    });
  });
  asyncEnd();
}

main() {
  asyncStart();
  test();
}