Thanx Daniel,

They actually suggested us to use their proprietary SDK for data
access rather than FTP. After that we didn't pursue the PyCurl line
further.

About PyCurl, they also said that prior to the transfer (RETR) command
pyCurl issues a SIZE command. K2 (a Video Server) replies with the
size of the media as stored on disk, however this do not include the
size of the GXF or MXF wrapper (MXF and GXF are different file formats
for wrapping audio/video data in broadcast world) and during transfer
PyCURL may well only save number of bytes as reported by the size
commend.

This may be interesting comment for PyCURL/cURL implementation. Since
our access to K2 was limited, hence we didn't debug this further.

If get to know anything more useful, I would update.

With regards,
- Shailesh

On Tue, Nov 3, 2009 at 1:21 PM, Daniel Stenberg <daniel_at_haxx.se> wrote:
> On Tue, 3 Nov 2009, Shailesh Kumar wrote:
>
>> Sorry for replying back on this thread after quite delay. We were able to
>> connect up with the K2 server people. They suggested that adding some more
>> options would be required for accessing files using PyCURL. Here is a brief.
>
> That's kind of them, but the list of options they provided didn't really
> make any sense. Possibly they and you had different degrees of success due
> to different libcurl versions or something. See my explanations of the
> specific options below:
>
>> c.setopt(c.FTP_USE_EPSV, 1)
>
> That's default.
>
>> c.setopt(c.QUOTE, ['TYPE I'])
>
> That's default
>
>> c.setopt(c.CONNECTTIMEOUT, 30)
>
> That doesn't alter what libcurl sends or receives, only how long it'll wait
> for a connect to succeed.
>
>> c.setopt(c.TIMEOUT, 300)
>
> This just sets a limit for how long a single request/transfer may take.
>
>> c.setopt(c.NOSIGNAL, 1)
>
> This only makes libcurl avoid the use of signals for timing out slow name
> resolves.
>
>> c.setopt(c.WRITEDATA, fp)
>
> That's used for the write callback.
>
> --
>
>  / daniel.haxx.se
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>
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Received on 2009-11-03