libtransport.git Files · msvc-deps/curl/docs/libcurl/curl_easy_recv.html

Files @ fb8216d261e8
Branch filter:
Location: libtransport.git/msvc-deps/curl/docs/libcurl/curl_easy_recv.html

fb8216d261e8 4.0 KiB text/html Show Annotation Show as Raw Download as Raw
Vitaly Takmazov
Twitter backend: fix embedded status
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">
<html><head>
<title>curl_easy_recv man page</title>
<meta name="generator" content="roffit">
<STYLE type="text/css">
P.level0 {
 padding-left: 2em;
}

P.level1 {
 padding-left: 4em;
}

P.level2 {
 padding-left: 6em;
}

span.emphasis {
 font-style: italic;
}

span.bold {
 font-weight: bold;
}

span.manpage {
 font-weight: bold;
}

h2.nroffsh {
 background-color: #e0e0e0;
}

span.nroffip {
 font-weight: bold;
 font-size: 120%;
 font-family: monospace;
}

p.roffit {
 text-align: center;
 font-size: 80%;
}
</STYLE>
</head><body>

<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
<p class="level0">curl_easy_recv - receives raw data on an "easy" connection <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
<p class="level0"><span Class="bold">#include &lt;curl/easy.h&gt;</span> 
<p class="level0"><span Class="bold">CURLcode curl_easy_recv( CURL * curl , void * buffer ,</span> <span Class="bold">size_t  buflen , size_t * n );</span> 
<p class="level0"><a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
<p class="level0">This function receives raw data from the established connection. You may use it together with <a class="emphasis" href="./curl_easy_send.html">curl_easy_send(3)</a> to implement custom protocols using libcurl. This functionality can be particularly useful if you use proxies and/or SSL encryption: libcurl will take care of proxy negotiation and connection set-up. 
<p class="level0"><span Class="bold">buffer</span> is a pointer to your buffer that will get the received data. <span Class="bold">buflen</span> is the maximum amount of data you can get in that buffer. The variable <span Class="bold">n</span> points to will receive the number of received bytes. 
<p class="level0">To establish the connection, set <span Class="bold">CURLOPT_CONNECT_ONLY</span> option before calling <a class="emphasis" href="./curl_easy_perform.html">curl_easy_perform(3)</a>. Note that <a class="emphasis" href="./curl_easy_recv.html">curl_easy_recv(3)</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(3)</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(3)</a> with <span Class="bold">CURLINFO_LASTSOCKET</span> to obtain the socket; use your operating system facilities like <span Class="emphasis">select(2)</span> to check if it has any data you can read. <a name="AVAILABILITY"></a><h2 class="nroffsh">AVAILABILITY</h2>
<p class="level0">Added in 7.18.2. <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
<p class="level0">On success, returns <span Class="bold">CURLE_OK</span>, stores the received data into <span Class="bold">buffer</span>, and the number of bytes it actually read into <span Class="bold">*n</span>. 
<p class="level0">On failure, returns the appropriate error code. 
<p class="level0">If there is no data to read, the function returns <span Class="bold">CURLE_AGAIN</span>. Use your operating system facilities to wait until the data is ready, and retry. <a name="EXAMPLE"></a><h2 class="nroffsh">EXAMPLE</h2>
<p class="level0">See <span Class="bold">sendrecv.c</span> in <span Class="bold">docs/examples</span> directory for usage example. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
<p class="level0"><a class="manpage" href="./curl_easy_setopt.html">curl_easy_setopt (3)</a> <a class="manpage" href="./curl_easy_perform.html">  curl_easy_perform (3)</a> <span Class="manpage"> </span> <a class="manpage" href="./curl_easy_getinfo.html">curl_easy_getinfo (3)</a> <span Class="manpage"> </span> <a class="manpage" href="./curl_easy_send.html">curl_easy_send (3) </a> <p class="roffit">
 This HTML page was made with <a href="http://daniel.haxx.se/projects/roffit/">roffit</a>.
</body></html>