Ensure that /snapshot is always "up-to date"

util/http/http.c

@@ -84,6 +84,19 @@ void *http_enum_params(http_worker_t *worker, FILE *stream, http_param_fn fn, vo
   return ret;
 }
 
+static void *http_get_param_fn(struct http_worker_s *worker, FILE *stream, const char *key, const char *value, void *opaque)
+{
+  if (!strcmp(key, opaque))
+    return (void*)value;
+
+  return NULL;
+}
+
+const char *http_get_param(http_worker_t *worker, const char *key)
+{
+  return http_enum_params(worker, NULL, http_get_param_fn, (void*)key);
+}
+
 static void http_process(http_worker_t *worker, FILE *stream)
 {
   // Read headers