content: /*
   *  Copyright 2016-2024 Qameta Software Inc
   *
   *  Licensed under the Apache License, Version 2.0 (the "License");
   *  you may not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   */
  package io.qameta.allure.httpclient5;
  
  import io.qameta.allure.AllureResultsWriteException;
  import org.apache.hc.core5.http.HttpEntity;
  import org.apache.hc.core5.http.ParseException;
  import org.apache.hc.core5.http.io.entity.EntityUtils;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  import java.util.zip.GZIPInputStream;
  
  /**
   * Utility class for working with HTTP entity in Allure framework.
   */
  @SuppressWarnings({"checkstyle:ParameterAssignment"})
  public final class AllureHttpEntityUtils {
  
      private AllureHttpEntityUtils() {
          throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
      }
  
      /**
       * Retrieves the body of the HTTP entity as a string.
       *
       * @param httpEntity the HTTP entity
       * @return the body of the HTTP entity as a string
       * @throws AllureResultsWriteException if an error occurs while reading the entity body
       */
      static String getBody(final HttpEntity httpEntity) {
          try {
              final String contentEncoding = httpEntity.getContentEncoding();
              if (contentEncoding != null && contentEncoding.contains("gzip")) {
                  return unpackGzipEntityString(httpEntity);
              } else {
                  return EntityUtils.toString(httpEntity, getContentEncoding(httpEntity.getContentEncoding()));
              }
          } catch (IOException | ParseException e) {
              throw new AllureResultsWriteException("Can't read request message body to String", e);
          }
      }
  
      /**
       * Retrieves the content encoding of the HTTP entity.
       *
       * @param contentEncoding the content encoding value
       * @return the charset corresponding to the content encoding, or UTF-8 if the encoding is invalid
       */
      static Charset getContentEncoding(final String contentEncoding) {
          try {
              return Charset.forName(contentEncoding);
          } catch (IllegalArgumentException ignored) {
              return StandardCharsets.UTF_8;
          }
      }
  
      /**
       * Unpacks the GZIP-encoded entity string.
       *
       * @param entity the GZIP-encoded HTTP entity
       * @return the unpacked entity string
       * @throws IOException if an error occurs while unpacking the entity
       */
      static String unpackGzipEntityString(final HttpEntity entity) throws IOException {
          final GZIPInputStream gis = new GZIPInputStream(entity.getContent());
          final Charset contentEncoding = getContentEncoding(entity.getContentEncoding());
          try (InputStreamReader inputStreamReader = new InputStreamReader(gis, contentEncoding)) {
              try (BufferedReader bufferedReader = new BufferedReader(inputStreamReader)) {
                  final StringBuilder outStr = new StringBuilder();
                  String line;
                  while ((line = bufferedReader.readLine()) != null) {
                      outStr.append(line);
                  }
                  return outStr.toString();
              }
          }
      }
  
  }
  