add ability to add custom hosts to BaseAuthenticationProvider

src/main/java/com/microsoft/graph/authentication/BaseAuthenticationProvider.java

@@ -6,12 +6,35 @@
 import java.util.Locale;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 /**
  * Provides basic common methods for all authentication providers
  */
 public abstract class BaseAuthenticationProvider implements IAuthenticationProvider {
     private static final HashSet<String> validGraphHostNames = new HashSet<>(Arrays.asList("graph.microsoft.com", "graph.microsoft.us", "dod-graph.microsoft.us", "graph.microsoft.de", "microsoftgraph.chinacloudapi.cn", "canary.graph.microsoft.com"));
+    private HashSet<String> customHosts;
+
+    /**
+     * Allow the user to add custom hosts by passing in Array
+     * @param customHosts custom hosts passed in by user.
+     */
+    public void setCustomHosts(@Nonnull String[] customHosts) {
+        if(this.customHosts == null){
+            this.customHosts = new HashSet<String>();
+        }
+        for(String host: customHosts){
+            this.customHosts.add(host.toLowerCase(Locale.ROOT));
+        }
+    }
+    /**
+     * Get the custom hosts set by user.
+     * @return the custom hosts set by user.
+     */
+    @Nullable
+    public String[] getCustomHosts(){
+        return customHosts.toArray(new String[customHosts.size()]);
+    }
     /**
      * Determines whether a request should be authenticated or not based on it's url.
      * If you're implementing a custom provider, call that method first before getting the token
@@ -22,6 +45,6 @@ protected boolean shouldAuthenticateRequestWithUrl(@Nonnull final URL requestUrl
         if (requestUrl == null || !requestUrl.getProtocol().toLowerCase(Locale.ROOT).equals("https"))
             return false;
         final String hostName = requestUrl.getHost().toLowerCase(Locale.ROOT);
-        return validGraphHostNames.contains(hostName);
+        return customHosts == null ? (validGraphHostNames.contains(hostName)) : (customHosts.contains(hostName));
     }
 }

src/main/java/com/microsoft/graph/authentication/TokenCredentialAuthProvider.java

@@ -21,6 +21,7 @@ public class TokenCredentialAuthProvider extends BaseAuthenticationProvider {
     private final TokenRequestContext context;
     /** Default scope to use when no scopes are provided */
     private static final String DEFAULT_GRAPH_SCOPE = "https://graph.microsoft.com/.default";
+
     /**
      * Creates an Authentication provider using a passed in TokenCredential
      *

src/test/java/com/microsoft/graph/authentication/BaseAuthenticationProviderTest.java

@@ -1,8 +1,5 @@
 package com.microsoft.graph.authentication;
 
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Arrays;
@@ -11,6 +8,8 @@
 
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.*;
+
 public class BaseAuthenticationProviderTest {
     final BaseAuthenticationProvider authProvider = new BaseAuthenticationProvider() {
 
@@ -67,4 +66,18 @@ public void providerDoesNotAddTokenOnNullUrls() throws MalformedURLException {
         //Assert
         assertFalse(result);
     }
+    @Test
+    public void providerAddsTokenToCustomHosts() throws MalformedURLException {
+        //Arrange
+        final URL url = new URL("https://localhost.com");
+        authProvider.setCustomHosts(new String[]{"localHost.com"});
+
+        //Act
+        final boolean result = authProvider.shouldAuthenticateRequestWithUrl(url);
+
+        //Assert
+        assertTrue(result);
+        assertEquals(authProvider.getCustomHosts().length, 1);
+        assertEquals(authProvider.getCustomHosts()[0], "localhost.com");
+    }
 }