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CURLOPT_POSTFIELDS.3: explain the 100-continue magic better

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Daniel Stenberg 2017-07-07 12:43:17 +02:00
parent 06a6feba9d
commit bbc9c6d144
1 changed files with 5 additions and 3 deletions
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8
docs/libcurl/opts/CURLOPT_POSTFIELDS.3
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@ -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.