/*
    * Copyright (c) 2011-2022, jcabi.com
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met: 1) Redistributions of source code must retain the above
    * copyright notice, this list of conditions and the following
    * disclaimer. 2) Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following
   * disclaimer in the documentation and/or other materials provided
   * with the distribution. 3) Neither the name of the jcabi.com nor
   * the names of its contributors may be used to endorse or promote
   * products derived from this software without specific prior written
   * permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package com.jcabi.http;
  
  import com.google.common.base.Joiner;
  import com.jcabi.http.mock.MkAnswer;
  import com.jcabi.http.mock.MkContainer;
  import com.jcabi.http.mock.MkGrizzlyContainer;
  import com.jcabi.http.mock.MkQuery;
  import com.jcabi.http.mock.MkQueryMatchers;
  import com.jcabi.http.response.RestResponse;
  import com.jcabi.http.response.XmlResponse;
  import com.jcabi.http.wire.BasicAuthWire;
  import com.jcabi.http.wire.UserAgentWire;
  import jakarta.ws.rs.core.HttpHeaders;
  import jakarta.ws.rs.core.MediaType;
  import jakarta.ws.rs.core.UriBuilder;
  import java.io.ByteArrayInputStream;
  import java.net.HttpURLConnection;
  import java.net.URI;
  import java.net.URLDecoder;
  import java.net.URLEncoder;
  import java.nio.charset.StandardCharsets;
  import org.glassfish.grizzly.http.server.Constants;
  import org.hamcrest.MatcherAssert;
  import org.hamcrest.Matchers;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.function.Executable;
  import org.junit.jupiter.params.ParameterizedTest;
  
  /**
   * Test case for {@link Request} and its implementations.
   * @since 1.7
   */
  @SuppressWarnings(
      {
          "PMD.TooManyMethods",
          "PMD.AvoidDuplicateLiterals",
          "PMD.TestClassWithoutTestCases"
      })
  final class RequestTest extends RequestTestTemplate {
  
      /**
       * BaseRequest can fetch HTTP request and process HTTP response.
       * @throws Exception If something goes wrong inside
       * @param type Request type
       */
      @Values
      @ParameterizedTest
      void sendsHttpRequestAndProcessesHttpResponse(
          final Class<? extends Request> type
      ) throws Exception {
          final MkContainer container = new MkGrizzlyContainer().next(
              new MkAnswer.Simple("\u20ac! hello!")
          ).start();
          RequestTestTemplate.request(container.home(), type)
              .uri().path("/helloall").back()
              .method(Request.GET)
              .fetch().as(RestResponse.class)
              .assertBody(Matchers.containsString("\u20ac!"))
              .assertBody(Matchers.containsString("hello!"))
              .assertStatus(HttpURLConnection.HTTP_OK);
          final MkQuery query = container.take();
          MatcherAssert.assertThat(
              query,
              MkQueryMatchers.hasPath(Matchers.containsString("helloall"))
          );
          MatcherAssert.assertThat(
              query.method(),
              Matchers.equalTo(Request.GET)
          );
          container.stop();
     }
 
     /**
      * BaseRequest can fetch HTTP headers.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsHttpRequestWithHeaders(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .through(UserAgentWire.class)
             .uri().path("/foo1").back()
             .method(Request.GET)
             .header(HttpHeaders.ACCEPT, "*/*")
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             query.headers(),
             Matchers.allOf(
                 Matchers.hasEntry(
                     Matchers.equalTo(HttpHeaders.ACCEPT),
                     Matchers.hasItem(Matchers.containsString("*"))
                 ),
                 Matchers.hasEntry(
                     Matchers.equalTo(HttpHeaders.USER_AGENT),
                     Matchers.hasItem(Matchers.containsString("jcabi"))
                 )
             )
         );
         container.stop();
     }
 
     /**
      * BaseRequest can fetch GET request with query params.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsTextWithGetParameters(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final String value = "some value of this param &^%*;'\"\u20ac\"";
         RequestTestTemplate.request(container.home(), type)
             .uri().queryParam("q", value).back()
             .method(Request.GET)
             .header(HttpHeaders.ACCEPT, MediaType.TEXT_XML)
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             URLDecoder.decode(
                 query.uri().toString(),
                 String.valueOf(StandardCharsets.UTF_8)
             ),
             Matchers.endsWith("\"€\"")
         );
         container.stop();
     }
 
     /**
      * BaseRequest can fetch body with HTTP POST request.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsTextWithPostRequestMatchParam(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final String value = "some random value of \u20ac param \"&^%*;'\"";
         RequestTestTemplate.request(container.home(), type)
             .method(Request.POST)
             .body().formParam("p", value).back()
             .header(
                 HttpHeaders.CONTENT_TYPE,
                 MediaType.APPLICATION_FORM_URLENCODED
             )
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             URLDecoder.decode(query.body(), StandardCharsets.UTF_8.toString()),
             Matchers.is(String.format("p=%s", value))
         );
         container.stop();
     }
 
     /**
      * BaseRequest can fetch body with HTTP POST request with params.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsTextWithPostRequestMatchMultipleParams(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final String value = "some value of \u20ac param \"&^%*;'\"";
         final String follow = "other value of \u20ac param \"&^%*;'\"";
         RequestTestTemplate.request(container.home(), type)
             .method(Request.POST)
             .body()
             .formParam("a", value)
             .formParam("b", follow)
             .back()
             .header(
                 HttpHeaders.CONTENT_TYPE,
                 MediaType.APPLICATION_FORM_URLENCODED
             )
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             URLDecoder.decode(query.body(), StandardCharsets.UTF_8.toString()),
             Matchers.is(
                 String.format("a=%s&b=%s", value, follow)
             )
         );
         container.stop();
     }
 
     /**
      * BaseRequest can fetch multipart body with HTTP POST request
      * with single byte param.
      * @throws Exception If something goes wrong inside
      * @checkstyle LineLength (30 lines)
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsMultipartPostRequestMatchByteParam(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final byte[] value = new byte[]{Byte.parseByte("-122")};
         RequestTestTemplate.request(container.home(), type)
             .method(Request.POST)
             .header(
                 HttpHeaders.CONTENT_TYPE,
                 String.format(
                     "%s; boundary=--xx", MediaType.MULTIPART_FORM_DATA
                 )
             )
             .multipartBody()
             .formParam("x", value)
             .back()
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             query.body(),
             Matchers.is(
                 Joiner.on(Constants.CRLF).join(
                     "----xx",
                     "Content-Disposition: form-data; name=\"x\"; filename=\"binary\"",
                     RequestTest.steamContentType(),
                     "",
                     "�",
                     "----xx--"
                 )
             )
         );
         container.stop();
     }
 
     /**
      * BaseRequest can fetch multipart body with HTTP POST request
      * with single param.
      * @throws Exception If something goes wrong inside
      * @checkstyle LineLength (30 lines)
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsMultipartPostRequestMatchSingleParam(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final String value = "value of \u20ac part param \"&^%*;'\"";
         RequestTestTemplate.request(container.home(), type)
             .method(Request.POST)
             .header(
                 HttpHeaders.CONTENT_TYPE,
                 String.format(
                     "%s; boundary=--xyz", MediaType.MULTIPART_FORM_DATA
                 )
             )
             .multipartBody()
             .formParam("c", value)
             .back()
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             query.body(),
             Matchers.is(
                 Joiner.on(Constants.CRLF).join(
                     "----xyz",
                     "Content-Disposition: form-data; name=\"c\"; filename=\"binary\"",
                     RequestTest.steamContentType(),
                     "",
                     "value of € part param \"&^%*;'\"",
                     "----xyz--"
                 )
             )
         );
         container.stop();
     }
 
     /**
      * BaseRequest can fetch multipart body with HTTP POST request
      * with two params.
      * @throws Exception If something goes wrong inside
      * @checkstyle LineLength (40 lines)
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsMultipartPostRequestMatchTwoParams(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final String value = "value of \u20ac one param \"&^%*;'\"";
         final String other = "value of \u20ac two param \"&^%*;'\"";
         RequestTestTemplate.request(container.home(), type)
             .method(Request.POST)
             .header(
                 HttpHeaders.CONTENT_TYPE,
                 String.format(
                     "%s; boundary=xy--", MediaType.MULTIPART_FORM_DATA
                 )
             )
             .multipartBody()
             .formParam("d", value)
             .formParam("e", other)
             .back()
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         final String separator = "--xy--";
         MatcherAssert.assertThat(
             query.body(),
             Matchers.is(
                 Joiner.on(Constants.CRLF).join(
                     separator,
                     "Content-Disposition: form-data; name=\"d\"; filename=\"binary\"",
                     RequestTest.steamContentType(),
                     "",
                     "value of € one param \"&^%*;'\"",
                     separator,
                     "Content-Disposition: form-data; name=\"e\"; filename=\"binary\"",
                     RequestTest.steamContentType(),
                     "",
                     "value of € two param \"&^%*;'\"",
                     "--xy----"
                 )
             )
         );
         container.stop();
     }
 
     /**
      * BaseRequest can fetch body with HTTP POST request.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsTextWithPostRequestMatchBody(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final String value = "\u20ac some body value with \"&^%*;'\"";
         RequestTestTemplate.request(container.home(), type)
             .method(Request.POST)
             .header(
                 HttpHeaders.CONTENT_TYPE,
                 MediaType.APPLICATION_FORM_URLENCODED
             )
             .body()
             .set(URLEncoder.encode(value, StandardCharsets.UTF_8.toString()))
             .back()
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             URLDecoder.decode(query.body(), StandardCharsets.UTF_8.toString()),
             Matchers.containsString(value)
         );
         container.stop();
     }
 
     /**
      * BaseRequest can assert HTTP status code value.
      * @throws Exception If something goes wrong inside.
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void assertsHttpStatus(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple(HttpURLConnection.HTTP_NOT_FOUND, "")
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .method(Request.GET)
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_NOT_FOUND)
             .assertStatus(
                 Matchers.equalTo(HttpURLConnection.HTTP_NOT_FOUND)
             );
         container.stop();
     }
 
     /**
      * BaseRequest can assert response body.
      * @throws Exception If something goes wrong inside.
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void assertsHttpResponseBody(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("some text \u20ac")
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .method(Request.GET)
             .fetch().as(RestResponse.class)
             .assertBody(Matchers.containsString("text \u20ac"))
             .assertStatus(HttpURLConnection.HTTP_OK);
         container.stop();
     }
 
     /**
      * BaseRequest can assert HTTP headers in response.
      * @throws Exception If something goes wrong inside.
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void assertsHttpHeaders(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("").withHeader(
                 HttpHeaders.CONTENT_TYPE, MediaType.TEXT_PLAIN
             )
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .method(Request.GET)
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK)
             .assertHeader(
                 "absent-for-sure",
                 Matchers.emptyIterableOf(String.class)
             )
             .assertHeader(
                 HttpHeaders.CONTENT_TYPE,
                 Matchers.everyItem(
                     Matchers.containsString(MediaType.TEXT_PLAIN)
                 )
             );
         container.stop();
     }
 
     /**
      * BaseRequest can assert response body content with XPath query.
      * @throws Exception If something goes wrong inside.
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void assertsResponseBodyWithXpathQuery(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("<root><a>\u0443\u0440\u0430!</a></root>")
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .method(Request.GET)
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK)
             .as(XmlResponse.class)
             .assertXPath("/root/a[contains(.,'!')]");
         container.stop();
     }
 
     /**
      * BaseRequest can work with URL returned by ContainerMocker.
      * @throws Exception If something goes wrong inside
      */
     @Values
     @ParameterizedTest
     void mockedUrlIsInCorrectFormat() throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         container.stop();
         final URI uri = container.home();
         MatcherAssert.assertThat(
             uri.toString().matches("^http://localhost:\\d+/$"),
             Matchers.describedAs(uri.toString(), Matchers.is(true))
         );
     }
 
     /**
      * BaseRequest can handle unicode in plain text response.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void acceptsUnicodeInPlainText(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("\u0443\u0440\u0430!").withHeader(
                 HttpHeaders.CONTENT_TYPE, "text/plain;charset=utf-8"
             )
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .method(Request.GET)
             .uri().path("/abcdefff").back()
             .fetch().as(RestResponse.class)
             .assertBody(Matchers.containsString("\u0443\u0440\u0430"))
             .assertBody(Matchers.containsString("!"));
         container.stop();
     }
 
     /**
      * BaseRequest can handle unicode in XML response.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void acceptsUnicodeInXml(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("<text>\u0443\u0440\u0430!</text>").withHeader(
                 HttpHeaders.CONTENT_TYPE, "text/xml;charset=utf-8"
             )
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .method(Request.GET)
             .uri().path("/barbar").back()
             .fetch().as(XmlResponse.class)
             .assertXPath("/text[contains(.,'\u0443\u0440\u0430')]");
         container.stop();
     }
 
     /**
      * BaseRequest can use basic authentication scheme.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @ParameterizedTest
     @Values
     void sendsBasicAuthenticationHeader(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final URI uri = UriBuilder.fromUri(container.home())
             .userInfo("user:\u20ac\u20ac").build();
         RequestTestTemplate.request(uri, type)
             .through(BasicAuthWire.class)
             .method(Request.GET)
             .uri().path("/abcde").back()
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         container.stop();
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             query.headers(),
             Matchers.hasEntry(
                 Matchers.equalTo(HttpHeaders.AUTHORIZATION),
                 Matchers.hasItem("Basic dXNlcjrigqzigqw=")
             )
         );
     }
 
     /**
      * BaseRequest can fetch GET request twice.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsIdenticalHttpRequestTwice(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer()
             .next(new MkAnswer.Simple(""))
             .next(new MkAnswer.Simple(""))
             .next(new MkAnswer.Simple(""))
             .start();
         final Request req = RequestTestTemplate.request(container.home(), type)
             .uri().path("/foo-X").back()
             .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_XML);
         req.method(Request.GET).fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         req.method(Request.POST).fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         req.method(Request.GET).fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         container.stop();
         MatcherAssert.assertThat(
             container.take(),
             MkQueryMatchers.hasPath(Matchers.endsWith("foo-X"))
         );
     }
 
     /**
      * BaseRequest can return redirect status (without redirecting).
      * @throws Exception If something goes wrong inside
      * @since 0.10
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void doesntRedirectWithoutRequest(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
                 .withStatus(HttpURLConnection.HTTP_SEE_OTHER)
                 .withHeader(HttpHeaders.LOCATION, "http://www.google.com")
         ).start();
         RequestTestTemplate.request(container.home(), type)
             .fetch().as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_SEE_OTHER);
         container.stop();
     }
 
     /**
      * BaseRequest can fetch body with HTTP POST request.
      * @throws Exception If something goes wrong inside
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void sendsRequestBodyAsInputStream(
         final Class<? extends Request> type
     ) throws Exception {
         final MkContainer container = new MkGrizzlyContainer().next(
             new MkAnswer.Simple("")
         ).start();
         final String value = "\u20ac body as stream \"&^%*;'\"";
         final ByteArrayInputStream stream =
             new ByteArrayInputStream(value.getBytes(StandardCharsets.UTF_8));
         RequestTestTemplate.request(container.home(), type)
             .method(Request.POST)
             .header(
                 HttpHeaders.CONTENT_TYPE,
                 MediaType.APPLICATION_FORM_URLENCODED
             )
             .fetch(stream).as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK);
         final MkQuery query = container.take();
         MatcherAssert.assertThat(
             query.body(),
             Matchers.containsString(value)
         );
         container.stop();
     }
 
     /**
      * BaseRequest.fetch(InputStream) throws an exception if the body has been
      * previously set.
      * @param type Request type
      */
     @Values
     @ParameterizedTest
     void fetchThrowsExceptionWhenBodyIsNotEmpty(
         final Class<? extends Request> type
     ) {
         Assertions.assertThrows(
             IllegalStateException.class,
             new Executable() {
                 @Override
                 public void execute() throws Throwable {
                     RequestTestTemplate.request(
                         new URI("http://localhost:78787"),
                         type
                     )
                         .method(Request.GET)
                         .body().set("already set").back()
                         .fetch(
                             new ByteArrayInputStream(
                                 "ba".getBytes(StandardCharsets.UTF_8)
                             )
                         );
                 }
             }
         );
     }
 
     /**
      * Content type stream.
      * @return Content type header.
      */
     private static String steamContentType() {
         return "Content-Type: application/octet-stream";
     }
 }