Hi Denis,

> Am 27.09.2019 um 10:28 schrieb Denis Chapligin via curl-library 
> <curl-library@cool.haxx.se>:
> 
>       curl_multi_add_handle(multi_handle, easy_handle);

can you log and check the return code of the curl_multi_add_handle calls? Maybe 
they fail for some reason. In general, I’d recommend to check all the return 
codes of every curl call.

Also I’d move the last curl_multi_perform call in line 53 (pastebin) before 
line 23 (so the order will be perform -> wait, as in the example [1]), to fix 
the following:
  * Currently you’re calling curl_multi_perform after every 
curl_multi_info_read, even if you didn’t add any new handles or didn’t wait for 
more I/O.
  * You’re also never calling curl_multi_perform again if none of the transfers 
has any messages/informationals available (some might be still active waiting 
for I/O, for example).

Best Regards,

Patrick

[1] https://curl.haxx.se/libcurl/c/curl_multi_wait.html


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