1 files changed, 49 insertions, 0 deletions
diff --git a/src/backend/taler-merchant-httpd_mhd.c b/src/backend/taler-merchant-httpd_mhd.c
index 698c2ac5..754c53b1 100644
--- a/src/backend/taler-merchant-httpd_mhd.c
+++ b/src/backend/taler-merchant-httpd_mhd.c
@@ -71,4 +71,53 @@ TMH_MHD_handler_agpl_redirect (const struct TMH_RequestHandler *rh,
 }
 
 
+/**
+ * Test if the client requested HTML output.
+ *
+ * @param connection client to test
+ * @return true if HTML was requested
+ */
+bool
+TMH_MHD_test_html_desired (struct MHD_Connection *connection)
+{
+  bool ret;
+  const char *accept;
+
+  accept = MHD_lookup_connection_value (connection,
+                                        MHD_HEADER_KIND,
+                                        MHD_HTTP_HEADER_ACCEPT);
+  if (NULL != accept)
+  {
+    char *a = GNUNET_strdup (accept);
+    char *saveptr;
+
+    for (char *t = strtok_r (a, ",", &saveptr);
+         NULL != t;
+         t = strtok_r (NULL, ",", &saveptr))
+    {
+      char *end;
+
+      /* skip leading whitespace */
+      while (isspace ((unsigned char) t[0]))
+        t++;
+      /* trim of ';q=' parameter and everything after space */
+      end = strchr (t, ';');
+      if (NULL != end)
+        *end = '\0';
+      end = strchr (t, ' ');
+      if (NULL != end)
+        *end = '\0';
+      if (0 == strcasecmp ("text/html",
+                           t))
+      {
+        ret = true;
+        break;
+      }
+    }
+    GNUNET_free (a);
+  }
+  return ret;
+}
+
+
 /* end of taler-exchange-httpd_mhd.c */