(Issue filed on behalf of Andrei Bica)
I've managed to produce this behavior by using a modified multi-poll.c example (see below) which makes 10 HTTP requests to "example.org:8200", set CURLOPT_TIMEOUT_MS to 1000 for each request and
CURLMOPT_MAX_TOTAL_CONNECTIONS to 1 for the multi handle.
I've used iptables to drop all packets going to URL address:
iptables -A OUTPUT -p tcp --destination-port 8200 -j DROP
I would expect the runtime to be around 1000 ms (the value of CURLOPT_TIMEOUT_MS), but instead I get a runtime of about 7000 ms.
#include <stdio.h>
#include <string.h>
/* somewhat unix-specific */
#include <sys/time.h>
#include <unistd.h>
/* curl stuff */
#include <curl/curl.h>
#define COUNT 10
#define URL "example.org:8200"
int main(void)
{
CURL *http_handles[COUNT];
CURLM *multi_handle;
int still_running = 1; /* keep number of running handles */
curl_global_init(CURL_GLOBAL_DEFAULT);
multi_handle = curl_multi_init();
curl_multi_setopt(multi_handle, CURLMOPT_MAX_TOTAL_CONNECTIONS, 1l);
for (int i = 0 ; i < COUNT ; i++) {
http_handles[i] = curl_easy_init();
curl_easy_setopt(http_handles[i], CURLOPT_URL, URL);
curl_easy_setopt(http_handles[i], CURLOPT_TIMEOUT_MS, 1000l);
curl_multi_add_handle(multi_handle, http_handles[i]);
}
while(still_running) {
CURLMcode mc; /* curl_multi_poll() return code */
int numfds;
/* we start some action by calling perform right away */
mc = curl_multi_perform(multi_handle, &still_running);
if(still_running)
/* wait for activity, timeout or "nothing" */
mc = curl_multi_poll(multi_handle, NULL, 0, 100, &numfds);
if(mc != CURLM_OK) {
fprintf(stderr, "curl_multi_wait() failed, code %d.\n", mc);
break;
}
}
for (int i = 0 ; i < COUNT ; i++) {
curl_multi_remove_handle(multi_handle, http_handles[i]);
curl_easy_cleanup(http_handles[i]);
}
curl_multi_cleanup(multi_handle);
curl_global_cleanup();
return 0;
}operating system
Linux
(Issue filed on behalf of Andrei Bica)
I've managed to produce this behavior by using a modified multi-poll.c example (see below) which makes 10 HTTP requests to "example.org:8200", set
CURLOPT_TIMEOUT_MSto 1000 for each request andCURLMOPT_MAX_TOTAL_CONNECTIONSto 1 for the multi handle.I've used iptables to drop all packets going to URL address:
I would expect the runtime to be around 1000 ms (the value of
CURLOPT_TIMEOUT_MS), but instead I get a runtime of about 7000 ms.operating system
Linux