ndpi_flow2json should check http.url before serializer

This patch will fix issue: https://github.com/ntop/PF_RING/issues/557

1 files changed, 6 insertions, 4 deletions

diff --git a/src/lib/ndpi_utils.c b/src/lib/ndpi_utils.c
index 1f57da19f..b3e92fdce 100644
--- a/src/lib/ndpi_utils.c
+++ b/src/lib/ndpi_utils.c
@@ -1032,10 +1032,12 @@ int ndpi_flow2json(struct ndpi_detection_module_struct *ndpi_struct,
     ndpi_serialize_start_of_block(serializer, "http");
     if(flow->host_server_name[0] != '\0')
       ndpi_serialize_string_string(serializer, "hostname", (const char*)flow->host_server_name);
-    ndpi_serialize_string_string(serializer,   "url", flow->http.url);
-    ndpi_serialize_string_uint32(serializer,   "code", flow->http.response_status_code);
-    ndpi_serialize_string_string(serializer,   "content_type", flow->http.content_type);
-    ndpi_serialize_string_string(serializer,   "user_agent", flow->http.user_agent);
+    if(flow->http.url != NULL){
+      ndpi_serialize_string_string(serializer,   "url", flow->http.url);
+      ndpi_serialize_string_uint32(serializer,   "code", flow->http.response_status_code);
+      ndpi_serialize_string_string(serializer,   "content_type", flow->http.content_type);
+      ndpi_serialize_string_string(serializer,   "user_agent", flow->http.user_agent);
+    }
     ndpi_serialize_end_of_block(serializer);
     break;