On Wed, 10 Dec 2008, Markus Moeller wrote:

> I am using curl 7.19.2 with libssh2 2.0.18 and see the same issue as
> described below (e.g recv returns -1) and I can't download a file with sftp.
> So, basically it isn't usable as it works sometimes and sometimes it doesn't.
>
> What is the solution to this problem ? Do I need a snapshot libssh2 and a
> curl fix ?

The problem described, which seems to be happening when libssh2 gets a buffer
size of 16K passed to it when reading data from an SFTP connection, is a
problem with libssh2 - I don't see how a libcurl change can be the right fix.

The correct approach here is to work on the libssh2 library to fix this flaw.
This thread on the libssh2-devel list seems to be "the one":

https://sourceforge.net/mailarchive/forum.php?thread_name=9c3275a90811261517v6c0b1da2u918cc1b8370abf83%40mail.gmail.com&forum_name=libssh2-devel

I've not yet managed to find enough time and energy and motivation to work on
that problem myself.

-- 
  / daniel.haxx.se