in c-modules/client_add_filter/mod_client_add_filter.c [17:31]
static int client_add_filter_header(void *data,
const char *key,
const char *val)
{
request_rec *r = (request_rec *)data;
if (strcasecmp(key, "X-AddInputFilter") == 0) {
ap_add_input_filter(val, NULL, r, r->connection);
}
else if (strcasecmp(key, "X-AddOutputFilter") == 0) {
ap_add_output_filter(val, NULL, r, r->connection);
}
return 1;
}