CURLOPT_SERVER_RESPONSE_TIMEOUT(3) Introduction to Library Functions CURLOPT_SERVER_RESPONSE_TIMEOUT(3)

CURLOPT_SERVER_RESPONSE_TIMEOUT - time allowed to wait for server response

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SERVER_RESPONSE_TIMEOUT,

long timeout);

Pass a long. It tells libcurl to wait no longer than timeout seconds for responses on sent commands. If no response is received within this period, the connection is considered dead and the transfer fails.

It is recommended that if used in conjunction with CURLOPT_TIMEOUT(3), you set CURLOPT_SERVER_RESPONSE_TIMEOUT(3) to a value smaller than CURLOPT_TIMEOUT(3).

60 seconds

This functionality affects ftp, imap, pop3, scp, sftp and smtp

int main(void)
{

CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/slow.txt");
/* wait no more than 23 seconds */
curl_easy_setopt(curl, CURLOPT_SERVER_RESPONSE_TIMEOUT, 23L);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
} }

This option was formerly known as CURLOPT_FTP_RESPONSE_TIMEOUT.

Added in curl 7.20.0

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

CURLOPT_CONNECTTIMEOUT(3), CURLOPT_LOW_SPEED_LIMIT(3), CURLOPT_SERVER_RESPONSE_TIMEOUT_MS(3), CURLOPT_TIMEOUT(3)

2025-12-13 libcurl