1 files changed, 25 insertions, 0 deletions
diff --git a/src/java/com/juick/http/www/Utils.java b/src/java/com/juick/http/www/Utils.java
index 7a8abecb..2ba12f5e 100644
--- a/src/java/com/juick/http/www/Utils.java
+++ b/src/java/com/juick/http/www/Utils.java
@@ -19,8 +19,10 @@ package com.juick.http.www;
 
 import java.io.BufferedReader;
 import java.io.FileOutputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.PrintWriter;
 import java.net.URL;
 import java.net.URLConnection;
 import java.sql.Connection;
@@ -126,6 +128,29 @@ public class Utils {
         }
     }
 
+    public static void replyJSON(HttpServletRequest request, HttpServletResponse response, String json) throws IOException {
+        response.setContentType("application/json; charset=UTF-8");
+        response.setHeader("Access-Control-Allow-Origin", "*");
+
+        String callback = request.getParameter("callback");
+        if (callback != null && (callback.length() > 64 || !callback.matches("[a-zA-Z0-9\\-\\_]+"))) {
+            callback = null;
+        }
+
+        PrintWriter out = response.getWriter();
+        try {
+            if (callback != null) {
+                out.print(callback + "(");
+                out.print(json);
+                out.print(")");
+            } else {
+                out.print(json);
+            }
+        } finally {
+            out.close();
+        }
+    }
+
     public static String convertArray2String(ArrayList<Integer> mids) {
         String q = "";
         for (int i = 0; i < mids.size(); i++) {