phasis" href="./curl_easy_recv.html">curl_easy_recv</a> does not work on connections that were created without this option. 
<p class="level0">You must ensure that the socket has data to read before calling <a Class="emphasis" href="./curl_easy_recv.html">curl_easy_recv</a>, otherwise the call will return <span Class="bold">CURLE_AGAIN</span> - the socket is used in non-blocking mode internally. Use <a Class="emphasis" href="./curl_easy_getinfo.html">curl_easy_getinfo</a> with <span Class="bold">CURLINFO_LA