paivana

commit 9089f3593f3988363a0b2284ae03a4745104f1ad
parent 0de0362118705bbbbd57389acb0495a1b03aa31b
Author: Sebastian <sebasjm@taler-systems.com>
Date:   Mon, 27 Apr 2026 12:18:06 -0300

fix #11356 adding paivana header reponse for non-web

Diffstat:
M
src/backend/paivana-httpd_templates.c
 | 
62
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 62 insertions(+), 0 deletions(-)
diff --git a/src/backend/paivana-httpd_templates.c b/src/backend/paivana-httpd_templates.c
@@ -26,6 +26,7 @@
 #include "platform.h"
 #include <curl/curl.h>
 #include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_uri_lib.h>
 #include <gnunet/gnunet_curl_lib.h>
 #include "paivana-httpd.h"
 #include "paivana-httpd_daemon.h"
@@ -174,6 +175,57 @@ eq (const char *s1,
 
 
 /**
+ * Create a taler://pay-template/ URI for the given @a con and @a template_id
+ * and @a instance_id.
+ *
+ * @param merchant_base_url URL to take host and path from;
+ *        we cannot take it from the MHD connection as a browser
+ *        may have changed 'http' to 'https' and we MUST be consistent
+ *        with what the merchant's frontend used initially
+ * @param template_id the template id
+ * @return corresponding taler://pay-template/ URI, or NULL on missing "host"
+ */
+static char *
+make_taler_pay_template_uri (const char *merchant_base_url,
+                             const char *template_id)
+{
+  struct GNUNET_Buffer buf = { 0 };
+  char *url;
+  struct GNUNET_Uri uri;
+
+  url = GNUNET_strdup (merchant_base_url);
+  if (-1 == GNUNET_uri_parse (&uri,
+                              url))
+  {
+    GNUNET_break (0);
+    GNUNET_free (url);
+    return NULL;
+  }
+  GNUNET_assert (NULL != template_id);
+  GNUNET_buffer_write_str (&buf,
+                           "taler");
+  if (0 == strcasecmp ("http",
+                       uri.scheme))
+    GNUNET_buffer_write_str (&buf,
+                             "+http");
+  GNUNET_buffer_write_str (&buf,
+                           "://pay-template/");
+  GNUNET_buffer_write_str (&buf,
+                           uri.host);
+  if (0 != uri.port)
+    GNUNET_buffer_write_fstr (&buf,
+                              ":%u",
+                              (unsigned int) uri.port);
+  if (NULL != uri.path)
+    GNUNET_buffer_write_path (&buf,
+                              uri.path);
+  GNUNET_buffer_write_path (&buf,
+                            template_id);
+  GNUNET_free (url);
+  return GNUNET_buffer_reap_str (&buf);
+}
+
+/**
  * Try to initialize the paywall response.
  *
  * @param conn connection to create the response for
@@ -239,6 +291,7 @@ load_paywall (struct MHD_Connection *conn,
     json_decref (data);
   }
 
+
   GNUNET_break (MHD_YES ==
                 MHD_add_response_header (reply,
                                          MHD_HTTP_HEADER_CONTENT_TYPE,
@@ -255,6 +308,15 @@ load_paywall (struct MHD_Connection *conn,
                 MHD_add_response_header (reply,
                                          MHD_HTTP_HEADER_CACHE_CONTROL,
                                          "public, max-age=300"));
+
+  char *uri;
+  uri = make_taler_pay_template_uri(PH_merchant_base_url, t->template_id);
+  GNUNET_assert (MHD_YES ==
+                MHD_add_response_header (reply,
+                                          "Paivana",
+                                          uri));
+  GNUNET_free(uri);
+
   {
     struct ResponseCacheEntry *rce;