Re: [Pyobjc-dev] FTP Lib with a Cocoa application

[Rob <rob...@gm...>]

Bit more...

Thinking this is a threading issue, I tried to write a facade that extends
NSObject and my FTPFile(thread) object (e.g. class FTPFileFacade(NSObject,
FTPFile):) and tried to call
self.performSelectorInBackground_withObject_('startUpload:',
None) to try to use NSThread instead (I think).

Doing this results in the same behavior where it gets to the upload step in
FTP, and then just hangs.  If, however, I use
self.performSelectorOnMainThread_withObject_waitUntilDone_('startUpload:',None,
False)
The FTP works properly, but again hangs the UI until the file is uploaded
(because I am using the main thread I would imagine).

I have to be missing something easy - any suggestions?

(I don't want to have to scrap this projects use of python and re-write the
mac client in objective-c as that defeats the whole purpose of us using
python in the first place)

Thanks for any help,
rob


On Tue, Sep 8, 2009 at 11:06 AM, Rob <rob...@gm...> wrote:

> One more bit of information:
> if I call the threaded bit with: worker.run() instead of worker.start()
> the FTP works as I want it, but it hangs the UI while doing the transfer.
>
>
>
> On Tue, Sep 8, 2009 at 10:49 AM, Rob <rob...@gm...> wrote:
>
>> My apologies if this has already been discussed  / answered, but I
>> couldn't figure out how to search the archives.
>> I am writing a Cocoa based FTP uploading application using ftplib and
>> threading and I've hit a bit of a snag.  I am sure it is something I am
>> doing wrong, but I wanted to check to see if I am way off.
>>
>> What appears to be happening is when I run the application within the
>> Cocoa GUI the FTP uploading part hangs when it tries to do the upload
>> (staring it's own thread I am assuming).  I am guessing it's a "thread in a
>> thread" issue? (total guess obviously)
>>
>> When I run the threaded library directly from __main__ on the command
>> line, with FTP set to debug I get the following:
>>
>> *cmd* 'TYPE I'
>> *put* 'TYPE I\r\n'
>> *get* '200 Type set to I\r\n'
>> *resp* '200 Type set to I'
>> *cmd* 'PASV'
>> *put* 'PASV\r\n'
>> *get* '227 Entering Passive Mode (xxx,xxx,xxx,212,4,3)\r\n'
>> *resp* '227 Entering Passive Mode (xxx,xxx,xxx,212,4,3)'
>> *cmd* 'STOR TestFile.mov'
>> *put* 'STOR TestFile.mov\r\n'
>> *get* '150 Connection accepted\r\n'
>> *resp* '150 Connection accepted'
>> *get* '226 Transfer OK\r\n'
>> *resp* '226 Transfer OK'
>> *cmd* 'QUIT'
>> *put* 'QUIT\r\n'
>> *get* '221 Goodbye\r\n'
>> *resp* '221 Goodbye'
>> Done.
>>
>> However when I run the same code within Cocoa I get the following:
>>
>> **cmd* 'TYPE I'*
>>
>> **put* 'TYPE I\r\n'*
>>
>> **get* '200 Type set to I\r\n'*
>>
>> **resp* '200 Type set to I'*
>>
>> **cmd* 'PASV'*
>>
>> **put* 'PASV\r\n'*
>>
>> **get* '227 Entering Passive Mode (xxx,xxx,xxx,212,4,4)\r\n'*
>>
>> **resp* '227 Entering Passive Mode (xxx,xxx,xxx,212,4,4)'*
>>
>> And it just hangs there.  It never gets to the next line.
>>
>> The library that does this is a threaded class: class FTPFile(Thread):
>> that just runs a typical ftp connection and upload in the run method:
>>
>> def run(self):
>>
>>         ftp = FTP(
>>
>>                     self.config.server,
>>
>>                     self.config.username,
>>
>>                     self.config.password)
>>
>> etc, etc
>>
>> I can FTP via the command line "ftp" application, and, like I said, when I
>> run the library directly so I don't think it's a server problem.  Is there
>> something I may have missed when creating the Cocoa app? Do I have to
>> explicitly allow FTP connections or something (I also have the firewall
>> off)? Or is this a known issue with Cocoa+Python?
>>
>> Thanks for any help,
>> rob
>>
>> --
>> http://robrohan.com
>> http://twitter.com/robrohan
>>
>
>
>
> --
> http://robrohan.com
> http://twitter.com/robrohan
>



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