[FIX] RESTXQ, Uploading files: ignore empty uploads forms

Author: ChristianGruen

basex-api/src/main/java/org/basex/http/restxq/RestXqFunction.java

@@ -519,14 +519,15 @@ private RestXqError error(final Value value, final QNm name) throws QueryExcepti
    * @throws IOException I/O exception
    * @throws QueryException query exception
    */
-  private void addMultipart(final IOContent body, final Map<String, Value> pars,
-      final String ext) throws IOException, QueryException {
+  private void addMultipart(final IOContent body, final Map<String, Value> pars, final String ext)
+      throws IOException, QueryException {
 
     final MainOptions opts = context.context.options;
     final HTTPPayload hp = new HTTPPayload(body.inputStream(), false, null, opts);
     final HashMap<String, Value> map = hp.multiForm(ext);
     for(final Map.Entry<String, Value> entry : map.entrySet()) {
-      pars.put(entry.getKey(), entry.getValue());
+      final String key = entry.getKey();
+      if(!key.isEmpty()) pars.put(key, entry.getValue());
     }
   }
 
@@ -539,9 +540,7 @@ private void addMultipart(final IOContent body, final Map<String, Value> pars,
    * @return cache
    * @throws IOException I/O exception
    */
-  private static IOContent cache(final HTTPContext http, final IOContent cache)
-      throws IOException {
-
+  private static IOContent cache(final HTTPContext http, final IOContent cache) throws IOException {
     if(cache != null) return cache;
     final BufferInput bi = new BufferInput(http.req.getInputStream());
     final IOContent io = new IOContent(bi.content());
@@ -554,9 +553,7 @@ private static IOContent cache(final HTTPContext http, final IOContent cache)
    * @param body request body
    * @param pars map parameters
    */
-  private static void addURLEncoded(final IOContent body,
-      final Map<String, Value> pars) {
-
+  private static void addURLEncoded(final IOContent body, final Map<String, Value> pars) {
     for(final String nv : body.toString().split("&")) {
       final String[] parts = nv.split("=", 2);
       if(parts.length < 2) continue;