Support proxy username and password (#2044)

Author: trask

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/configuration/Configuration.java

@@ -203,6 +203,8 @@ public static class Proxy {
 
     public String host;
     public int port = 80;
+    public String username;
+    public String password;
   }
 
   public static class PreviewConfiguration {

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/httpclient/LazyHttpClient.java

@@ -60,6 +60,8 @@ public class LazyHttpClient implements HttpClient {
   public static volatile CountDownLatch safeToInitLatch;
   public static volatile String proxyHost;
   public static volatile Integer proxyPortNumber;
+  public static volatile String proxyUsername;
+  public static volatile String proxyPassword;
 
   public static HttpClient getInstance() {
     return INSTANCE;
@@ -109,9 +111,13 @@ private static HttpClient init() {
 
     NettyAsyncHttpClientBuilder builder = new NettyAsyncHttpClientBuilder();
     if (proxyHost != null && proxyPortNumber != null) {
-      builder.proxy(
+      ProxyOptions proxyOptions =
           new ProxyOptions(
-              ProxyOptions.Type.HTTP, new InetSocketAddress(proxyHost, proxyPortNumber)));
+              ProxyOptions.Type.HTTP, new InetSocketAddress(proxyHost, proxyPortNumber));
+      if (proxyUsername != null) {
+        proxyOptions.setCredentials(proxyUsername, proxyPassword);
+      }
+      builder.proxy(proxyOptions);
     }
     // keeping the thread count to 1 keeps the number of 16mb io.netty.buffer.PoolChunk to 1 also
     return builder

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/init/AiComponentInstaller.java

@@ -154,6 +154,8 @@ private static AppIdSupplier start(Instrumentation instrumentation) {
     if (config.proxy.host != null) {
       LazyHttpClient.proxyHost = config.proxy.host;
       LazyHttpClient.proxyPortNumber = config.proxy.port;
+      LazyHttpClient.proxyUsername = config.proxy.username;
+      LazyHttpClient.proxyPassword = config.proxy.password;
     }
 
     List<MetricFilter> metricFilters =