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CURLOPT_READFUNCTION.3: provide the upload data size up front 

Assisted-by: Jay Satiro
Closes #5607
This commit is contained in:
Daniel Stenberg 2020-06-25 09:54:40 +02:00
parent 1529838a14
commit 43f7ffb6c4
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1 changed files with 6 additions and 1 deletions
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7
docs/libcurl/opts/CURLOPT_READFUNCTION.3
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@ -20,7 +20,7 @@
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_READFUNCTION 3 "16 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.TH CURLOPT_READFUNCTION 3 "25 Jun 2020" "libcurl 7.71.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_READFUNCTION \- read callback for data uploads
.SH SYNOPSIS
@ -64,6 +64,11 @@ server end and the transfer will end there.
If you set this callback pointer to NULL, or don't set it at all, the default
internal read function will be used. It is doing an fread() on the FILE *
userdata set with \fICURLOPT_READDATA(3)\fP.
You can set the total size of the data you are sending by using
\fICURLOPT_INFILESIZE_LARGE(3)\fP or \fICURLOPT_POSTFIELDSIZE_LARGE(3)\fP,
depending on the type of transfer. For some transfer types it may be required
and it allows for better error checking.
.SH DEFAULT
The default internal read callback is fread().
.SH PROTOCOLS