Handled + in URLs and added test

src/main/java/com/google/firebase/FirebaseOptions.java

@@ -64,7 +64,7 @@ public final class FirebaseOptions {
         @Override
         public GoogleCredentials get() {
           try {
-            return GoogleCredentials.getApplicationDefault();
+            return GoogleCredentials.getApplicationDefault().createScoped(FIREBASE_SCOPES);
           } catch (IOException e) {
             throw new IllegalStateException(e);
           }

src/main/java/com/google/firebase/database/utilities/Utilities.java

@@ -76,11 +76,12 @@ public static ParsedUrl parseUrl(String url) throws DatabaseException {
 
       repoInfo.internalHost = repoInfo.host;
       // use raw (encoded) path for backwards compatibility.
-      String originalPathString = uri.getRawPath();
-      Validation.validateRootPathString(originalPathString);
+      String pathString = uri.getRawPath();
+      pathString = pathString.replace("+", " ");
+      Validation.validateRootPathString(pathString);
 
       ParsedUrl parsedUrl = new ParsedUrl();
-      parsedUrl.path = new Path(originalPathString);
+      parsedUrl.path = new Path(pathString);
       parsedUrl.repoInfo = repoInfo;
 
       return parsedUrl;

src/test/java/com/google/firebase/database/utilities/UtilitiesTest.java

@@ -83,6 +83,9 @@ public void testParseValidUrl() {
     assertTrue(url.repoInfo.isSecure());
     assertEquals("random valid namespace", url.repoInfo.namespace);
     assertEquals("/path%20with%20spaces", url.path.toString());
+
+    url = Utilities.parseUrl("http://test.firebaseio.com/+");
+    assertEquals("/ ", url.path.toString());
   }
 
   @Test