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/*
 * Copyright The Microcks Authors.
 *
 * 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.github.microcks.config;

import io.github.microcks.util.UsernamePasswordProxyAuthenticator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

import java.net.Authenticator;

/**
 * @author laurent
 */
@Component
public class ProxyConfiguration {

   /** A simple logger for diagnostic messages. */
   private static Logger log = LoggerFactory.getLogger(ProxyConfiguration.class);

   @Value("${network.proxyHost}")
   private String proxyHost;

   @Value("${network.nonProxyHosts}")
   private String nonProxyHosts;

   @Value("${network.proxyPort}")
   private Integer proxyPort;

   @Value("${network.proxyUsername}")
   private String proxyUsername;

   @Value("${network.proxyPassword}")
   private String proxyPassword;

   @Bean
   public ProxySettings buildProxySettings() {
      // Initialize ProxySettings if provided.
      if (proxyHost != null && proxyPort != null) {
         log.info("Configuring HTTP(S) proxy to {}:{}", proxyHost, proxyPort);
         System.setProperty("http.proxyHost", proxyHost);
         System.setProperty("http.proxyPort", proxyPort.toString());
         System.setProperty("http.nonProxyHosts", nonProxyHosts);
         System.setProperty("https.proxyHost", proxyHost);
         System.setProperty("https.proxyPort", proxyPort.toString());
         System.setProperty("https.nonProxyHosts", nonProxyHosts);

         // From jdk 8.111+ we also need to remove disabled schemes to allow Basic authentication
         // for HTTPS for example (see http://www.oracle.com/technetwork/java/javase/8u111-relnotes-3124969.html).
         if (proxyUsername != null && proxyPassword != null) {
            System.setProperty("jdk.http.auth.tunneling.disabledSchemes", "");
            System.setProperty("jdk.http.auth.proxying.disabledSchemes", "");
         }

         // Build settings and set Authenticator for the whole JVM.
         ProxySettings settings = new ProxySettings(proxyHost, proxyPort, proxyUsername, proxyPassword);
         Authenticator.setDefault(new UsernamePasswordProxyAuthenticator(settings));

         return settings;
      }
      return null;
   }
}