Scalar source URLs resolve to "null/<groupName>" on second request when using GroupedOpenApi fixes #3230

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/scalar/AbstractScalarController.java

@@ -167,7 +167,7 @@ private String buildJsBundleUrl(String requestUrl, String scalarPath) {
 	 * @return  the api docs url
 	 */
 	private String buildApiDocsUrl(String requestUrl, String apiDocsPath) {
-		String apiDocsUrl = scalarProperties.getUrl();
+		String apiDocsUrl = originalScalarUrl;
 		if (SCALAR_DEFAULT_URL.equals(originalScalarUrl)) {
 			String serverUrl = requestUrl.substring(0, requestUrl.length() - scalarProperties.getPath().length());
 			apiDocsUrl = serverUrl + apiDocsPath;

springdoc-openapi-starter-webmvc-scalar/src/test/java/test/org/springdoc/webmvc/scalar/app5/SpringDocApp5Test.java

@@ -34,5 +34,6 @@ public class SpringDocApp5Test extends AbstractCommonTest {
 	@Test
 	void checkContent() throws Exception {
 		checkContent(SCALAR_DEFAULT_PATH);
+		checkContent(SCALAR_DEFAULT_PATH);
 	}
 }