cURL libcurl API curl_easy_cleanup
curl_easy_cleanup.3 -- man page
This function must be the last function to call for an easy session. It is the opposite of the curl_easy_init function and must be called with the same handle as input that a curl_easy_init call returned.
This might close all connections this handle has used and possibly has kept open until now - unless it was attached to a multi handle while doing the transfers. Don't call this function if you intend to transfer more files, re-using handles is a key to good performance with libcurl.
Occasionally you may get your progress callback or header callback called from within curl_easy_cleanup (if previously set for the handle using curl_easy_setopt). Like if libcurl decides to shut down the connection and the protocol is of a kind that requires a command/response sequence before disconnect. Examples of such protocols are FTP, POP3 and IMAP.
Any use of the handle after this function has been called and have returned, is illegal. curl_easy_cleanup kills the handle and all memory associated with it!
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