httpd: add "struct file*" parameter to httpd_cgi_handler() callback

UPGRADING

@@ -49,6 +49,8 @@ with newer versions.
   * LWIP_HOOK_DHCP_APPEND_OPTIONS() has changed, see description in opt.h (options_out_len is not
     available in struct dhcp any more)
 
+  * httpd LWIP_HTTPD_CGI_SSI: httpd_cgi_handler() has an additional parameter "struct fs_file *"
+
 (2.0.2)
 
   ++ Application changes:

src/apps/httpd/httpd.c

@@ -2304,9 +2304,9 @@ http_init_file(struct http_state *hs, struct fs_file *file, int is_09, const cha
       {
         count = extract_uri_parameters(hs, params);
       }
-      httpd_cgi_handler(uri, count, http_cgi_params, http_cgi_param_vals
+      httpd_cgi_handler(file, uri, count, http_cgi_params, http_cgi_param_vals
 #if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
-                        , hs->handle->state
+                        , file->state
 #endif /* LWIP_HTTPD_FILE_STATE */
                        );
     }

src/include/lwip/apps/httpd.h

@@ -102,13 +102,17 @@ void http_set_cgi_handlers(const tCGI *pCGIs, int iNumHandlers);
 #if LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI
 
 #if LWIP_HTTPD_CGI_SSI
+/* we have to prototype this struct here to make it available for the handler */
+struct fs_file;
+
 /** Define this generic CGI handler in your application.
  * It is called once for every URI with parameters.
  * The parameters can be stored to the object passed as connection_state, which
  * is allocated to file->state via fs_state_init() from fs_open() or fs_open_custom().
  * Content creation via SSI or complete dynamic files can retrieve the CGI params from there.
  */
-extern void httpd_cgi_handler(const char* uri, int iNumParams, char **pcParam, char **pcValue
+extern void httpd_cgi_handler(struct fs_file *file, const char* uri, int iNumParams,
+                              char **pcParam, char **pcValue
 #if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
                                      , void *connection_state
 #endif /* LWIP_HTTPD_FILE_STATE */