content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.camel.component.http.interceptor;
  
  import java.io.IOException;
  import java.net.URISyntaxException;
  import java.nio.charset.StandardCharsets;
  import java.util.Base64;
  
  import org.apache.hc.core5.http.EntityDetails;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HttpException;
  import org.apache.hc.core5.http.HttpHeaders;
  import org.apache.hc.core5.http.HttpRequest;
  import org.apache.hc.core5.http.HttpRequestInterceptor;
  import org.apache.hc.core5.http.ProtocolException;
  import org.apache.hc.core5.http.protocol.HttpContext;
  
  public class RequestProxyBasicAuth implements HttpRequestInterceptor {
      @Override
      public void process(final HttpRequest request, final EntityDetails entity, final HttpContext context)
              throws HttpException, IOException {
          String auth = null;
  
          try {
              String requestLine = request.getUri().toString();
              // assert we set a write GET URI
              if (requestLine.contains("http://localhost")) {
                  throw new HttpException("Get a wrong proxy GET url");
              }
          } catch (URISyntaxException e) {
              throw new RuntimeException(e);
          }
          Header h = request.getFirstHeader(HttpHeaders.PROXY_AUTHORIZATION);
          if (h != null) {
              String s = h.getValue();
              if (s != null) {
                  auth = s.trim();
              }
          }
  
          if (auth != null) {
              int i = auth.indexOf(' ');
              if (i == -1) {
                  throw new ProtocolException("Invalid Authorization header: " + auth);
              }
              String authscheme = auth.substring(0, i);
              if (authscheme.equalsIgnoreCase("basic")) {
                  String s = auth.substring(i + 1).trim();
                  byte[] credsRaw = s.getBytes(StandardCharsets.US_ASCII);
                  Base64.Decoder codec = Base64.getDecoder();
                  String creds = new String(codec.decode(credsRaw), StandardCharsets.US_ASCII);
                  context.setAttribute("proxy-creds", creds);
              }
          }
      }
  }
  