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48<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
49<p class="level0">curl_easy_perform - Perform a file transfer <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
50<p class="level0"><span Class="bold">#include &lt;curl/curl.h&gt;</span> 
51<p class="level0"><span Class="bold">CURLcode curl_easy_perform(CURL * easy_handle );</span> 
52<p class="level0"><a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
53<p class="level0">Invoke this function after <a class="emphasis" href="./curl_easy_init.html">curl_easy_init(3)</a> and all the <a class="emphasis" href="./curl_easy_setopt.html">curl_easy_setopt(3)</a> calls are made, and will perform the transfer as described in the options. It must be called with the same <span Class="bold">easy_handle</span> as input as the <a class="emphasis" href="./curl_easy_init.html">curl_easy_init(3)</a> call returned. 
54<p class="level0"><a class="emphasis" href="./curl_easy_perform.html">curl_easy_perform(3)</a> performs the entire request in a blocking manner and returns when done, or if it failed. For non-blocking behavior, see <a class="emphasis" href="./curl_multi_perform.html">curl_multi_perform(3)</a>. 
55<p class="level0">You can do any amount of calls to <a class="emphasis" href="./curl_easy_perform.html">curl_easy_perform(3)</a> while using the same <span Class="bold">easy_handle</span>. If you intend to transfer more than one file, you are even encouraged to do so. libcurl will then attempt to re-use the same connection for the following transfers, thus making the operations faster, less CPU intense and using less network resources. Just note that you will have to use <a class="emphasis" href="./curl_easy_setopt.html">curl_easy_setopt(3)</a> between the invokes to set options for the following curl_easy_perform. 
56<p class="level0">You must never call this function simultaneously from two places using the same <span Class="bold">easy_handle</span>. Let the function return first before invoking it another time. If you want parallel transfers, you must use several curl easy_handles. 
57<p class="level0">While the <span Class="bold">easy_handle</span> is added to a multi handle, it cannot be used by <a class="emphasis" href="./curl_easy_perform.html">curl_easy_perform(3)</a>. <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
58<p class="level0">CURLE_OK (0) means everything was ok, non-zero means an error occurred as <span Class="emphasis">&lt;curl/curl.h&gt;</span> defines - see <span Class="emphasis">libcurl-errors(3)</span>. If the <span Class="bold">CURLOPT_ERRORBUFFER</span> was set with <a class="emphasis" href="./curl_easy_setopt.html">curl_easy_setopt(3)</a> there will be a readable error message in the error buffer when non-zero is returned. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
59<p class="level0"><a class="manpage" href="./curl_easy_init.html">curl_easy_init (3)</a> <a class="manpage" href="./curl_easy_setopt.html">  curl_easy_setopt (3)</a> <span Class="manpage"> </span> <a class="manpage" href="./curl_multi_add_handle.html">curl_multi_add_handle (3)</a> <a class="manpage" href="./curl_multi_perform.html">  curl_multi_perform (3)</a> <span Class="manpage"> </span> <span Class="manpage">libcurl-errors (3)</span> <span Class="manpage"> </span> 
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