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53 <p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
54 <p class="level0">CURLOPT_HTTP_VERSION - specify HTTP protocol version to use <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
55 <p class="level0">#include <curl/curl.h>
56 <p class="level0">CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTP_VERSION, long version); <a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
57 <p class="level0">Pass <span Class="emphasis">version</span> a long, set to one of the values described below. They force libcurl to use the specific HTTP versions. This is not sensible to do unless you have a good reason. You have to set this option if you want to use libcurl's HTTP/2 support.
59 <p class="level0"><a name="CURLHTTPVERSIONNONE"></a><span class="nroffip">CURL_HTTP_VERSION_NONE</span>
60 <p class="level1">We don't care about what version the library uses. libcurl will use whatever it thinks fit.
61 <p class="level0"><a name="CURLHTTPVERSION10"></a><span class="nroffip">CURL_HTTP_VERSION_1_0</span>
62 <p class="level1">Enforce HTTP 1.0 requests.
63 <p class="level0"><a name="CURLHTTPVERSION11"></a><span class="nroffip">CURL_HTTP_VERSION_1_1</span>
64 <p class="level1">Enforce HTTP 1.1 requests.
65 <p class="level0"><a name="CURLHTTPVERSION20"></a><span class="nroffip">CURL_HTTP_VERSION_2_0</span>
66 <p class="level1">Attempt HTTP 2 requests. libcurl will fall back to HTTP 1.x if HTTP 2 can't be negotiated with the server. (Added in 7.33.0) <a name="DEFAULT"></a><h2 class="nroffsh">DEFAULT</h2>
67 <p class="level0">CURL_HTTP_VERSION_NONE <a name="PROTOCOLS"></a><h2 class="nroffsh">PROTOCOLS</h2>
68 <p class="level0">HTTP <a name="EXAMPLE"></a><h2 class="nroffsh">EXAMPLE</h2>
69 <p class="level0">TODO <a name="AVAILABILITY"></a><h2 class="nroffsh">AVAILABILITY</h2>
70 <p class="level0">Along with HTTP <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
71 <p class="level0">Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
72 <p class="level0"><a Class="manpage" href="./CURLOPT_SSLVERSION.html">CURLOPT_SSLVERSION</a>, <a Class="manpage" href="./CURLOPT_HTTP200ALIASES.html">CURLOPT_HTTP200ALIASES</a>, <span Class="manpage"> </span> <p class="roffit">
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