Uses proxy with password authentication.

sources/src/main/java/com/ullink/slack/simpleslackapi/impl/DefaultWebSocketContainerProvider.java

@@ -1,8 +1,14 @@
 package com.ullink.slack.simpleslackapi.impl;
 
 import com.ullink.slack.simpleslackapi.WebSocketContainerProvider;
+
 import org.glassfish.tyrus.client.ClientManager;
 import org.glassfish.tyrus.client.ClientProperties;
+import org.glassfish.tyrus.core.Base64Utils;
+
+import java.nio.charset.Charset;
+import java.util.HashMap;
+import java.util.Map;
 
 import javax.websocket.WebSocketContainer;
 
@@ -11,10 +17,14 @@ public class DefaultWebSocketContainerProvider implements WebSocketContainerProv
 
     private String proxyAddress;
     private int proxyPort;
+    private String proxyUser;
+    private String proxyPassword;
 
-    DefaultWebSocketContainerProvider(String proxyAdress, int proxyPort) {
+    DefaultWebSocketContainerProvider(String proxyAdress, int proxyPort, String proxyUser, String proxyPassword) {
         this.proxyAddress = proxyAdress;
         this.proxyPort = proxyPort;
+        this.proxyUser = proxyUser;
+        this.proxyPassword = proxyPassword;
     }
 
     @Override
@@ -25,6 +35,12 @@ public WebSocketContainer getWebSocketContainer()
         {
             clientManager.getProperties().put(ClientProperties.PROXY_URI, "http://" + proxyAddress + ":" + proxyPort);
         }
+        if (proxyUser != null)
+        {
+            Map<String, String> headers = new HashMap<>();
+            headers.put("Proxy-Authorization", "Basic " + Base64Utils.encodeToString((proxyUser + ":" + proxyPassword).getBytes(Charset.forName("UTF-8")), false));
+            clientManager.getProperties().put(ClientProperties.PROXY_HEADERS, headers);
+        }
         return clientManager;
     }
 }

sources/src/main/java/com/ullink/slack/simpleslackapi/impl/SlackSessionFactory.java

@@ -22,6 +22,8 @@ public static class SlackSessionFactoryBuilder {
         private Proxy.Type proxyType;
         private String proxyAddress;
         private int proxyPort;
+        private String proxyUser;
+        private String proxyPassword;
         private int heartbeat;
         private TimeUnit unit;
         private WebSocketContainerProvider provider;
@@ -38,6 +40,15 @@ public SlackSessionFactoryBuilder withProxy(Proxy.Type proxyType, String proxyAd
             return this;
         }
 
+        public SlackSessionFactoryBuilder withProxy(Proxy.Type proxyType, String proxyAddress, int proxyPort, String proxyUser, String proxyPassword) {
+            this.proxyType = proxyType;
+            this.proxyAddress = proxyAddress;
+            this.proxyPort = proxyPort;
+            this.proxyUser = proxyUser;
+            this.proxyPassword = proxyPassword;
+            return this;
+        }
+
         public SlackSessionFactoryBuilder withConnectionHeartbeat(int heartbeat, TimeUnit unit) {
             this.heartbeat = heartbeat;
             this.unit = unit;
@@ -56,7 +67,7 @@ public SlackSessionFactoryBuilder withAutoreconnectOnDisconnection(boolean autor
 
 
         public SlackSession build() {
-            return new SlackWebSocketSessionImpl(provider,authToken, proxyType, proxyAddress, proxyPort, autoreconnection,heartbeat,unit);
+            return new SlackWebSocketSessionImpl(provider, authToken, proxyType, proxyAddress, proxyPort, proxyUser, proxyPassword, autoreconnection, heartbeat,unit);
         }
     }
 }

sources/src/main/java/com/ullink/slack/simpleslackapi/impl/SlackWebSocketSessionImpl.java

@@ -21,13 +21,18 @@
 import org.apache.http.HttpHost;
 import org.apache.http.HttpResponse;
 import org.apache.http.NameValuePair;
+import org.apache.http.auth.AuthScope;
+import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.client.CredentialsProvider;
 import org.apache.http.client.HttpClient;
+import org.apache.http.client.config.RequestConfig;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.utils.URIBuilder;
 import org.apache.http.entity.ContentType;
 import org.apache.http.entity.mime.MultipartEntityBuilder;
+import org.apache.http.impl.client.BasicCredentialsProvider;
 import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.http.impl.conn.DefaultProxyRoutePlanner;
 import org.apache.http.message.BasicNameValuePair;
@@ -103,6 +108,8 @@ class SlackWebSocketSessionImpl extends AbstractSlackSessionImpl implements Slac
     private String                            proxyAddress;
     private int                               proxyPort                  = -1;
     HttpHost                                  proxyHost;
+    private String                            proxyUser;
+    private String                            proxyPassword;
     private volatile long                     lastPingSent;
     private volatile long                     lastPingAck;
 
@@ -243,18 +250,20 @@ private <E extends SlackEvent, L extends SlackEventListener<E>> void dispatchImp
         this.authToken = authToken;
         this.reconnectOnDisconnection = reconnectOnDisconnection;
         this.heartbeat = heartbeat != 0 ? unit.toMillis(heartbeat) : 30000;
-        this.webSocketContainerProvider = webSocketContainerProvider != null ? webSocketContainerProvider : new DefaultWebSocketContainerProvider(null,0);
+        this.webSocketContainerProvider = webSocketContainerProvider != null ? webSocketContainerProvider : new DefaultWebSocketContainerProvider(null, 0, null, null);
         addInternalListeners();
     }
 
-    SlackWebSocketSessionImpl(WebSocketContainerProvider webSocketContainerProvider, String authToken, Proxy.Type proxyType, String proxyAddress, int proxyPort, boolean reconnectOnDisconnection, long heartbeat, TimeUnit unit) {
+    SlackWebSocketSessionImpl(WebSocketContainerProvider webSocketContainerProvider, String authToken, Proxy.Type proxyType, String proxyAddress, int proxyPort, String proxyUser, String proxyPassword, boolean reconnectOnDisconnection, long heartbeat, TimeUnit unit) {
         this.authToken = authToken;
         this.proxyAddress = proxyAddress;
         this.proxyPort = proxyPort;
         this.proxyHost = new HttpHost(proxyAddress, proxyPort);
         this.reconnectOnDisconnection = reconnectOnDisconnection;
         this.heartbeat = heartbeat != 0 ? unit.toMillis(heartbeat) : DEFAULT_HEARTBEAT_IN_MILLIS;
-        this.webSocketContainerProvider = webSocketContainerProvider != null ? webSocketContainerProvider : new DefaultWebSocketContainerProvider(proxyAddress,proxyPort);
+        this.webSocketContainerProvider = webSocketContainerProvider != null ? webSocketContainerProvider : new DefaultWebSocketContainerProvider(proxyAddress, proxyPort, proxyUser, proxyPassword);
+        this.proxyUser = proxyUser;
+        this.proxyPassword = proxyPassword;
         addInternalListeners();
     }
 
@@ -798,7 +807,17 @@ private HttpClient getHttpClient() {
         HttpClient client;
         if (proxyHost != null)
         {
-            client = HttpClientBuilder.create().setRoutePlanner(new DefaultProxyRoutePlanner(proxyHost)).build();
+            if(null == this.proxyUser)
+            {
+                client = HttpClientBuilder.create().setRoutePlanner(new DefaultProxyRoutePlanner(proxyHost)).build();
+            }
+            else
+            {
+                RequestConfig config = RequestConfig.custom().setProxy(this.proxyHost).build();
+                CredentialsProvider credsProvider = new BasicCredentialsProvider();
+                credsProvider.setCredentials(new AuthScope(this.proxyHost), new UsernamePasswordCredentials(this.proxyUser, this.proxyPassword));
+                client = HttpClientBuilder.create().setDefaultCredentialsProvider(credsProvider).setDefaultRequestConfig(config).build();
+            }
         }
         else
         {