diff -r 3213724a4996 -r fb83f58ece66 ko-bck2brwsr/src/main/java/org/apidesign/html/ko2brwsr/BrwsrCntxt.java
--- a/ko-bck2brwsr/src/main/java/org/apidesign/html/ko2brwsr/BrwsrCntxt.java	Wed May 01 07:06:43 2013 +0200
+++ b/ko-bck2brwsr/src/main/java/org/apidesign/html/ko2brwsr/BrwsrCntxt.java	Fri May 03 10:27:06 2013 +0200
@@ -20,6 +20,9 @@
  */
 package org.apidesign.html.ko2brwsr;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 import net.java.html.json.Context;
 import org.apidesign.html.json.spi.ContextBuilder;
 import org.apidesign.html.json.spi.FunctionBinding;
@@ -102,4 +105,18 @@
     public <M> M toModel(Class<M> modelClass, Object data) {
         return modelClass.cast(data);
     }
+
+    @Override
+    public Object toJSON(InputStream is) throws IOException {
+        StringBuilder sb = new StringBuilder();
+        InputStreamReader r = new InputStreamReader(is);
+        for (;;) {
+            int ch = r.read();
+            if (ch == -1) {
+                break;
+            }
+            sb.append((char)ch);
+        }
+        return ConvertTypes.parse(sb.toString());
+    }
 }