paivana

commit 88ce3c98456dc44cec796883c996411795ed58c1
parent 102ef2570750a3969cb7147df167352ef5fb3c48
Author: Florian Dold <dold@taler.net>
Date:   Tue, 28 Jul 2026 16:46:18 +0200

paivana: answer HEAD requests for the paywall page

Only GET was dispatched to the template handler, so a HEAD fell through to
the paywall check and was redirected to the paywall URL it was already
requesting, forever.

Issue: https://bugs.taler.net/n/11640

Diffstat:
M
src/backend/paivana-httpd_daemon.c
 | 
9
+++++++--

1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/backend/paivana-httpd_daemon.c b/src/backend/paivana-httpd_daemon.c
@@ -168,8 +168,13 @@ create_response (void *cls,
   if ( (0 == strncmp (url,
                       "/.well-known/paivana/templates/",
                       strlen ("/.well-known/paivana/templates/"))) &&
-       (0 == strcasecmp (meth,
-                         MHD_HTTP_METHOD_GET)) )
+       ( (0 == strcasecmp (meth,
+                           MHD_HTTP_METHOD_GET)) ||
+         /* HEAD must be answered like GET (MHD suppresses the body);
+            otherwise it falls through to the paywall check below,
+            which redirects to this very URL again -- forever. */
+         (0 == strcasecmp (meth,
+                           MHD_HTTP_METHOD_HEAD)) ) )
   {
     const char *id = &url[strlen ("/.well-known/paivana/templates/")];