http2: more documentation for prior knowledge

curl · Mar 31, 2016 · 213d3c7 · 213d3c7
1 parent 324a97e
commit 213d3c7
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Showing 2 changed files with 13 additions and 5 deletions.
diff --git a/docs/curl.1 b/docs/curl.1
@@ -151,10 +151,13 @@ version. (Added in 7.33.0)
 (HTTP) Tells curl to issue its requests using HTTP 2. This requires that the
 underlying libcurl was built to support it. (Added in 7.33.0)
 .IP "--http2-prior-knowledge"
-(HTTP) Tells curl to issue its requests using HTTP 2 without HTTP/1.1 Upgrade. 
-This requires prior knowledge that the server supports HTTP 2.
-This requires that the underlying libcurl was built to support it. 
-(Added in 7.49.0)
+(HTTP) Tells curl to issue its non-TLS HTTP requests using HTTP/2 without
+HTTP/1.1 Upgrade. It requires prior knowledge that the server supports HTTP/2
+straight away. HTTPS requests will still do HTTP/2 the standard way with
+negotiated protocol version in the TLS handshake.
+
+HTTP/2 support in general also requires that the underlying libcurl was built
+to support it. (Added in 7.49.0)
 .IP "--no-npn"
 Disable the NPN TLS extension. NPN is enabled by default if libcurl was built
 with an SSL library that supports NPN. NPN is used by a libcurl that supports

diff --git a/docs/libcurl/opts/CURLOPT_HTTP_VERSION.3 b/docs/libcurl/opts/CURLOPT_HTTP_VERSION.3
@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * 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
@@ -54,6 +54,11 @@ actual protocol name.
 Attempt HTTP 2 over TLS (HTTPS) only. libcurl will fall back to HTTP 1.1 if
 HTTP 2 can't be negotiated with the HTTPS server. For clear text HTTP servers,
 libcurl will use 1.1. (Added in 7.47.0)
+.IP CURL_HTTP_VERSION_2_PRIOR_KNOWLEDGE
+Issue non-TLS HTTP requests using HTTP/2 without HTTP/1.1 Upgrade. It requires
+prior knowledge that the server supports HTTP/2 straight away. HTTPS requests
+will still do HTTP/2 the standard way with negotiated protocol version in the
+TLS handshake.
 .SH DEFAULT
 CURL_HTTP_VERSION_NONE
 .SH PROTOCOLS