curl/docs/libcurl/opts/CURLINFO_NUM_CONNECTS.md
Daniel Stenberg e694c8284a
docs/libcurl/opts: clarify the return values
Expand a little.

- mention the type name of the return code
- avoid stating which exact return codes that might be returned, as that
  varies over time, builds and conditions
- avoid stating some always return OK
- refer to the manpage documenting all the return codes

Closes #15900
2025-01-02 17:13:33 +01:00

68 lines
1.5 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLINFO_NUM_CONNECTS
Section: 3
Source: libcurl
See-also:
- curl_easy_getinfo (3)
- curl_easy_setopt (3)
Protocol:
- All
Added-in: 7.12.3
---
# NAME
CURLINFO_NUM_CONNECTS - get number of created connections
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_NUM_CONNECTS, long *nump);
~~~
# DESCRIPTION
Pass a pointer to a long to receive how many new connections libcurl had to
create to achieve the previous transfer (only the successful connects are
counted). Combined with CURLINFO_REDIRECT_COUNT(3) you are able to know how
many times libcurl successfully reused existing connection(s) or not. See the
connection options of curl_easy_setopt(3) to see how libcurl tries to make
persistent connections to save time.
# %PROTOCOLS%
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long connects;
res = curl_easy_getinfo(curl, CURLINFO_NUM_CONNECTS, &connects);
if(!res)
printf("It needed %ld connects\n", connects);
}
curl_easy_cleanup(curl);
}
}
~~~
# %AVAILABILITY%
# RETURN VALUE
curl_easy_getinfo(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).