http: add CURLINFO_HTTP_VERSION and %{http_version}

Adds access to the effectively used http version to both libcurl and
curl.

Closes #799

4 files changed, 63 insertions, 0 deletions

diff --git a/docs/curl.1 b/docs/curl.1
index f2d48f171..ed047724e 100644
--- a/docs/curl.1
+++ b/docs/curl.1
@@ -1944,6 +1944,9 @@ same info.
 The numerical code that was found in the last response (from a proxy) to a
 curl CONNECT request. (Added in 7.12.4)
 .TP
+.B http_version
+The http version that was effectively used. (Added in 7.50.0)
+.TP
 .B local_ip
 The IP address of the local end of the most recently done connection - can be
 either IPv4 or IPv6 (Added in 7.29.0)
diff --git a/docs/libcurl/curl_easy_getinfo.3 b/docs/libcurl/curl_easy_getinfo.3
index 2b4c7fe53..9ffcd14af 100644
--- a/docs/libcurl/curl_easy_getinfo.3
+++ b/docs/libcurl/curl_easy_getinfo.3
@@ -50,6 +50,9 @@ See \fICURLINFO_RESPONSE_CODE(3)\fP
 .IP CURLINFO_HTTP_CONNECTCODE
 Last proxy CONNECT response code.
 See \fICURLINFO_HTTP_CONNECTCODE(3)\fP
+.IP CURLINFO_HTTP_VERSION
+The http version used in the connection.
+See \fICURLINFO_HTTP_VERSION(3)\fP
 .IP CURLINFO_FILETIME
 Remote time of the retrieved document.
 See \fICURLINFO_FILETIME(3)\fP
diff --git a/docs/libcurl/opts/CURLINFO_HTTP_VERSION.3 b/docs/libcurl/opts/CURLINFO_HTTP_VERSION.3
new file mode 100644
index 000000000..b0f43e549
--- /dev/null
+++ b/docs/libcurl/opts/CURLINFO_HTTP_VERSION.3
@@ -0,0 +1,56 @@
+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at https://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLINFO_HTTP_VERSION 3 "11 May 2016" "libcurl 7.50.0" "curl_easy_getinfo options"
+.SH NAME
+CURLINFO_HTTP_VERSION \- get the http version used in the connection
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTP_VERSION, long *p);
+.SH DESCRIPTION
+Pass a pointer to a long to receive the version used in the last http connection.
+The returned value will be CURL_HTTP_VERSION_1_0, CURL_HTTP_VERSION_1_1, or
+CURL_HTTP_VERSION_2_0, or 0 if the version can't be determined.
+.SH PROTOCOLS
+HTTP
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  CURLcode res;
+  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
+  res = curl_easy_perform(curl);
+  if(res == CURLE_OK) {
+    long http_version;
+    curl_easy_getinfo(curl, CURLINFO_HTTP_VERSION, &http_version);
+  }
+  curl_easy_cleanup(curl);
+}
+.fi
+.SH AVAILABILITY
+Added in 7.50.0
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR CURLINFO_RESPONSE_CODE "(3), "
+.BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions
index fa26efbe7..d05a46904 100644
--- a/docs/libcurl/symbols-in-versions
+++ b/docs/libcurl/symbols-in-versions
@@ -223,6 +223,7 @@ CURLINFO_HEADER_SIZE            7.4.1
 CURLINFO_HTTPAUTH_AVAIL         7.10.8
 CURLINFO_HTTP_CODE              7.4.1         7.10.8
 CURLINFO_HTTP_CONNECTCODE       7.10.7
+CURLINFO_HTTP_VERSION           7.50.0
 CURLINFO_LASTONE                7.4.1
 CURLINFO_LASTSOCKET             7.15.2
 CURLINFO_LOCAL_IP               7.21.0