On Tue, 24 Jan 2012, Wenjun Chen wrote:

Please don't top-post.

> The libcurl version is 7.21.7. Libcurl returned SUCCESS in this case. And
> the READFUNCTION only called once and got correct data.

You forgot the perhaps most important question:

Did the VERBOSE output show any clues?

It could hint if this was a SEEKFUNCTION problem or not. BTW, SEEKFUNCTION is
documented. Is there anything that isn't clear on how it works?

-- 
  / daniel.haxx.se
-------------------------------------------------------------------
List admin: http://cool.haxx.se/list/listinfo/curl-library
Etiquette:  http://curl.haxx.se/mail/etiquette.html