Create missy

missy

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+
+import com.google.auth.oauth2.GoogleCredentials;
+import com.google.auth.oauth2.IdTokenCredentials;
+import com.google.auth.oauth2.IdTokenProvider;
+import com.google.auth.oauth2.IdTokenProvider.Option;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+
+public class IdTokenFromMetadataServer {
+
+  public static void main(String[] args) throws IOException, GeneralSecurityException {
+    // TODO(Developer): Replace the below variables before running the code.
+
+    // The url or target audience to obtain the ID token for.
+    String url = "https://example.com";
+
+    getIdTokenFromMetadataServer(url);
+  }
+
+  // Use the Google Cloud metadata server to create an identity token and add it to the
+  // HTTP request as part of an Authorization header.
+  public static void getIdTokenFromMetadataServer(String url) throws IOException {
+    // Construct the GoogleCredentials object which obtains the default configuration from your
+    // working environment.
+    GoogleCredentials googleCredentials = GoogleCredentials.getApplicationDefault();
+
+    IdTokenCredentials idTokenCredentials =
+        IdTokenCredentials.newBuilder()
+            .setIdTokenProvider((IdTokenProvider) googleCredentials)
+            .setTargetAudience(url)
+            // Setting the ID token options.
+            .setOptions(Arrays.asList(Option.FORMAT_FULL, Option.LICENSES_TRUE))
+            .build();
+
+    // Get the ID token.
+    // Once you've obtained the ID token, you can use it to make an authenticated call to the
+    // target audience.
+    String idToken = idTokenCredentials.refreshAccessToken().getTokenValue();
+    System.out.println("Generated ID token.");
+  }
+}