Added blurb for the READFUNCTION, including the new CURL_READFUNC_ABORT

return code.
This commit is contained in:
Daniel Stenberg 2004-06-21 14:09:23 +00:00
parent 7291772b1f
commit 1886893d66

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@ -119,6 +119,15 @@ filled with at most \fIsize\fP multiplied with \fInmemb\fP number of
bytes. Your function must return the actual number of bytes that you stored in
that memory area. Returning 0 will signal end-of-file to the library and cause
it to stop the current transfer.
If you stop the current transfer by returning 0 "pre-maturely" (i.e before the
server expected it, like when you've told you will upload N bytes and you
upload less than N bytes), you may experience that the server "hangs" waiting
for the rest of the data that won't come.
In libcurl 7.12.1 and later, the read callback may return
\fICURL_READFUNC_ABORT\fP to stop the current operation at once, with a
\fICURLE_ABORTED_BY_CALLBACK\fP error code from the transfer.
.IP CURLOPT_READDATA
Data pointer to pass to the file read function. Note that if you specify the
\fICURLOPT_READFUNCTION\fP, this is the pointer you'll get as input. If you