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CURLOPT_LOW_SPEED_LIMIT(3) Library Functions Manual CURLOPT_LOW_SPEED_LIMIT(3)

NAME

CURLOPT_LOW_SPEED_LIMIT - low speed limit in bytes per second

SYNOPSIS


#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOW_SPEED_LIMIT,
long speedlimit);

DESCRIPTION

Pass a long as parameter. It contains the average transfer speed in bytes per second that the transfer should be below during CURLOPT_LOW_SPEED_TIME(3) seconds for libcurl to consider it to be too slow and abort.

DEFAULT

0, disabled

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE


int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* abort if slower than 30 bytes/sec during 60 seconds */
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 60L);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 30L);
res = curl_easy_perform(curl);
if(CURLE_OPERATION_TIMEDOUT == res) {
printf("Timeout.\n");
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}

AVAILABILITY

Added in curl 7.1

RETURN VALUE

Returns CURLE_OK

SEE ALSO

CURLOPT_LOW_SPEED_TIME(3), CURLOPT_MAX_RECV_SPEED_LARGE(3), CURLOPT_MAX_SEND_SPEED_LARGE(3), CURLOPT_TIMEOUT(3)
2025-05-13 libcurl
Copyright 2011-2025 Jonas 'Sortie' Termansen and contributors.
Sortix's source code is free software under the ISC license.
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