CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PIPELINING_SERVER_BL, char **servers);
Pass a servers array of char *, ending with a NULL entry. This is a list of server types prefixes (in the Server: HTTP header) that are blocked from pipelining, i.e server types that are known to not support HTTP pipelining. The array is copied by libcurl.
Note that the comparison matches if the Server: header begins with the string in the block list, i.e "Server: Ninja 1.2.3" and "Server: Ninja 1.4.0" can both be blocked by having "Ninja" in the list.
Pass a NULL pointer to clear the block list.
char *server_block_list[] =
{
"Microsoft-IIS/6.0",
"nginx/0.8.54",
NULL
};
curl_multi_setopt(m, CURLMOPT_PIPELINING_SERVER_BL, server_block_list);