ftpilb.FTP.stor...() freeze mystery
in [Python]
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From: Anthra Norell on 27 Oct 2009 06:53 Hi, I am trying to upload a bunch of web pages to a hosting service. I have a connected ftplib.FTP object and can upload files manually from an IDLE command line using the methods storlines () for html files and storbinary () for the pictures. So far no problem. In order to upload the whole set of files I wrote a loop that iterates through the file names and calls either of the stor... () methods as appropriate. The loop successfully uploads eight of some twenty files and then freezes. Ctrl-C doesn't unlock the freeze. I have to kill the IDLE window which raises a confirmation request "are you sure? The program is still running." Having no alternative I am sure. I open a new IDLE window and start over. Every retry fails the exact same way. My upload method with the loop has a preview mode. It goes through all the motions including opening and closing my source files but skips the stor... () methods and in addition displays all commands. The preview mode completes the iteration sequence and shows nothing unexpected. What could be the problem? I am totally fazed and will be most grateful for expert suggestions. Frederic
From: Gabriel Genellina on 27 Oct 2009 20:48 En Tue, 27 Oct 2009 07:53:36 -0300, Anthra Norell <anthra.norell(a)bluewin.ch> escribi�: > I am trying to upload a bunch of web pages to a hosting service. I > have a connected ftplib.FTP object and can upload files manually from an > IDLE command line using the methods storlines () for html files and > storbinary () for the pictures. So far no problem. In order to upload > the whole set of files I wrote a loop that iterates through the file > names and calls either of the stor... () methods as appropriate. The > loop successfully uploads eight of some twenty files and then freezes. > Ctrl-C doesn't unlock the freeze. I have to kill the IDLE window which > raises a confirmation request "are you sure? The program is still > running." Having no alternative I am sure. I open a new IDLE window and > start over. Every retry fails the exact same way. From the description alone I can't infer any problem. Certainly uploading files with ftplib worked fine last time I tried. Try to remove all unnecesary lines from your script, making it as small as possible but still showing your problem, and post it here. -- Gabriel Genellina
From: Gabriel Genellina on 27 Oct 2009 20:48 En Tue, 27 Oct 2009 07:53:36 -0300, Anthra Norell <anthra.norell(a)bluewin.ch> escribi�: > I am trying to upload a bunch of web pages to a hosting service. I > have a connected ftplib.FTP object and can upload files manually from an > IDLE command line using the methods storlines () for html files and > storbinary () for the pictures. So far no problem. In order to upload > the whole set of files I wrote a loop that iterates through the file > names and calls either of the stor... () methods as appropriate. The > loop successfully uploads eight of some twenty files and then freezes. > Ctrl-C doesn't unlock the freeze. I have to kill the IDLE window which > raises a confirmation request "are you sure? The program is still > running." Having no alternative I am sure. I open a new IDLE window and > start over. Every retry fails the exact same way. From the description alone I can't infer any problem. Certainly uploading files with ftplib worked fine last time I tried. Try to remove all unnecesary lines from your script, making it as small as possible but still showing your problem, and post it here. -- Gabriel Genellina
From: Anthra Norell on 28 Oct 2009 07:05 Gabriel Genellina wrote: > En Tue, 27 Oct 2009 07:53:36 -0300, Anthra Norell > <anthra.norell(a)bluewin.ch> escribi�: > >> I am trying to upload a bunch of web pages to a hosting service. I >> have a connected ftplib.FTP object and can upload files manually from >> an IDLE command line using the methods storlines () for html files >> and storbinary () for the pictures. So far no problem. In order to >> upload the whole set of files I wrote a loop that iterates through >> the file names and calls either of the stor... () methods as >> appropriate. The loop successfully uploads eight of some twenty files >> and then freezes. Ctrl-C doesn't unlock the freeze. I have to kill >> the IDLE window which raises a confirmation request "are you sure? >> The program is still running." Having no alternative I am sure. I >> open a new IDLE window and start over. Every retry fails the exact >> same way. > > From the description alone I can't infer any problem. Certainly > uploading > files with ftplib worked fine last time I tried. Try to remove all > unnecesary lines from your script, making it as small as possible but > still showing your problem, and post it here. > Gabriel, Thank you for your suggestion. In the meantime I uploaded my entire webseite hacker style, listing the server directories after each freeze-restart and shortening the list of files to transfer by the ones that passed before the last freeze. The exercise revealed that the freezes are less predictable than it seemed in the beginning. On one occasion it occurred after the transfer of a single file from the IDLE command line (my_ftp_object.storlines ("STOR file_name", f). The file did upload. So the freezes seem to occur after a successful transfer. The command-line freeze is evidence of an ftp protocol implementation or timing problem between the ftplib module and the hosting server. My code that passes files to the FTP object for transmission one by one is off the hook, so I won't bother you with it. Of course, I am in contact with the hosting service, but expect them not to assume the burden of proof. If you (or someone else) would suggest a means to visualize the transfer, dumping a stack or writing a log or something of that sort, I think I'd be on the right track. Frederic
From: Gabriel Genellina on 28 Oct 2009 18:56 En Wed, 28 Oct 2009 08:05:22 -0300, Anthra Norell <anthra.norell(a)bluewin.ch> escribi�: > Gabriel Genellina wrote: >> En Tue, 27 Oct 2009 07:53:36 -0300, Anthra Norell >> <anthra.norell(a)bluewin.ch> escribi�: >> >>> I am trying to upload a bunch of web pages to a hosting service.[...] >>> I wrote a loop that iterates through the file names and calls either >>> of the stor... () methods as appropriate. The loop successfully >>> uploads eight of some twenty files and then freezes. Ctrl-C doesn't >>> unlock the freeze. I have to kill the IDLE window > freezes are less predictable than it seemed in the beginning. On one > occasion it occurred after the transfer of a single file from the IDLE > command line (my_ftp_object.storlines ("STOR file_name", f). The file > did upload. So the freezes seem to occur after a successful transfer. In this thread from last month, Sean DiZazzo shows how to add a timeout parameter to storbinary: http://comments.gmane.org/gmane.comp.python.general/639258 Do the same with storlines and see whether it helps. -- Gabriel Genellina
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