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-rw-r--r--src/java/com/juick/api/Main.java2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/java/com/juick/api/Main.java b/src/java/com/juick/api/Main.java
index d32a00aa..ebbeb103 100644
--- a/src/java/com/juick/api/Main.java
+++ b/src/java/com/juick/api/Main.java
@@ -125,7 +125,7 @@ public class Main extends HttpServlet {
response.setHeader("Access-Control-Allow-Origin", "*");
String callback = request.getParameter("callback");
- if (callback.length() > 64 || !callback.matches("a-zA-Z0-9\\-")) {
+ if (callback != null && (callback.length() > 64 || !callback.matches("[a-zA-Z0-9\\-]+"))) {
callback = null;
}