[lwip-devel] Patch: avoid sending Content-Length header for async file

[Giuseppe Modugno]

diff --git a/src/apps/httpd/httpd.c b/src/apps/httpd/httpd.c
index 0ac8d49..112c7a8 100644
--- a/src/apps/httpd/httpd.c
+++ b/src/apps/httpd/httpd.c
@@ -936,7 +936,7 @@ get_http_headers(struct http_state *hs, const char *uri)
     add_content_len = 0; /* @todo: get maximum file length from SSI */
   } else
 #endif /* LWIP_HTTPD_SSI */
-    if ((hs->handle == NULL) ||
+    if ((hs->handle == NULL) || (hs->handle->data == NULL) ||
         ((hs->handle->flags & (FS_FILE_FLAGS_HEADER_INCLUDED | 
FS_FILE_FLAGS_HEADER_PERSISTENT)) == FS_FILE_FLAGS_HEADER_INCLUDED)) {
       add_content_len = 0;
     }

I think it's better to check hs->handle->data too. If it is NULL, we 
have no data yet, so we can't send Content Length header.