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-rw-r--r--docs/libcurl/opts/CURLOPT_POSTFIELDS.38
1 files changed, 5 insertions, 3 deletions
diff --git a/docs/libcurl/opts/CURLOPT_POSTFIELDS.3 b/docs/libcurl/opts/CURLOPT_POSTFIELDS.3
index 17ec2d76f..515376bab 100644
--- a/docs/libcurl/opts/CURLOPT_POSTFIELDS.3
+++ b/docs/libcurl/opts/CURLOPT_POSTFIELDS.3
@@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
-.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2017, 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
@@ -52,8 +52,10 @@ the POST data from the read callback. If you want to send a zero-byte POST set
\fICURLOPT_POSTFIELDS(3)\fP to an empty string, or set \fICURLOPT_POST(3)\fP to
1 and \fICURLOPT_POSTFIELDSIZE(3)\fP to 0.
-Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue" header.
-You can disable this header with \fICURLOPT_HTTPHEADER(3)\fP as usual.
+Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue" header,
+and libcurl will add that header automatically if the POST is either known to
+be larger than 1024 bytes or if the expected size is unknown. You can disable
+this header with \fICURLOPT_HTTPHEADER(3)\fP as usual.
To make multipart/formdata posts (aka RFC2388-posts), check out the
\fICURLOPT_HTTPPOST(3)\fP option combined with \fIcurl_formadd(3)\fP.