Hello.

I'm using libcurl 7.25.0 and want to ask how to set maximum bytes to read
by CURLOPT_READFUNCTION. I thought that it is done by
CURLFORM_CONTENTSLENGTH argument to curl_formadd, and then callback
function will be called with such size_t size, size_t nmemb parameters,
that it will not read more than CURLFORM_CONTENTSLENGTH bytes, but it looks
like size * nmemb only represents a buffer size:
read_from_files: bytes to read: 16384 // size * nmemb
read_from_files: total_bytes_read: 16384
read_from_files: bytes to read: 16384
read_from_files: total_bytes_read: 9116
read_from_files: bytes to read: 16384
read_from_files: total_bytes_read: 0

while I would expect:
read_from_files: bytes to read: 16384
read_from_files: total_bytes_read: 16384
read_from_files: bytes to read: 3616
read_from_files: total_bytes_read: 3616

if CURLFORM_CONTENTSLENGTH == 20000.

Is it a bug or I have to pass max length somehow through userdata parameter?

Thanks in advance,
Sergey Naumov.

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Received on 2014-01-18