Fix duplicate slashes in path

Author: mythz

src/ServiceStackIDEA/src/main/java/net/servicestack/idea/UpdateServiceStackUtils.java

@@ -67,9 +67,9 @@ public static void updateServiceStackReference(PsiFile psiFile) {
 
         String existingPath = builder.getPath();
         if(existingPath == null || existingPath.equals("/")) {
-            builder.setPath("/" + nativeTypesHandler.getRelativeTypesUrl());
+            builder.setPath(combinePath("", nativeTypesHandler.getRelativeTypesUrl()));
         } else {
-            builder.setPath(existingPath + "/" + nativeTypesHandler.getRelativeTypesUrl());
+            builder.setPath(combinePath(existingPath, nativeTypesHandler.getRelativeTypesUrl()));
         }
 
         Map<String,String> options = new HashMap<String,String>();
@@ -134,6 +134,18 @@ public static void updateServiceStackReference(PsiFile psiFile) {
         }
     }
 
+    public static String combinePath(String path, String segment) {
+        if (path == null || path.isEmpty()) {
+            return "/" + segment;
+        }
+
+        if (path.charAt(path.length() - 1) == '/') {
+            return path + segment;
+        }
+
+        return path + "/" + segment;
+    }
+
     public static boolean containsOptionsHeader(PsiFile psiJavaFile) {
         Document dtoDocument = FileDocumentManager.getInstance().getDocument(psiJavaFile.getVirtualFile());
         if(dtoDocument == null) {