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Code Issues Releases Wiki Activity

CURLOPT_POSTFIELDS.3: clarify how it gets the size of the data

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Ref: https://curl.se/mail/lib-2021-04/0085.html
Closes #6943
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Daniel Stenberg 2021-04-23 17:14:58 +02:00
parent a60b111980
commit f014eeceb2
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1 changed files with 6 additions and 1 deletions
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7
docs/libcurl/opts/CURLOPT_POSTFIELDS.3
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@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" * Copyright (C) 1998 - 2021, 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
@ -52,6 +52,11 @@ 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.
libcurl will use assume this option points to a nul-terminated string unless
you also set \fICURLOPT_POSTFIELDSIZE(3)\fP to specify the length of the
provided data, which then is strictly required if you want to send off nul
bytes included in the data.
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 1MB or if the expected size is unknown. You can disable this