[Tutor] ftp recursive directory function doesn't work.

[Sean Murphy]

Thanks all,

I knew I missed something very obvious in relation to the OS Method  

I will have to use regular expressions as the output from one of the FTP functions give you the file permissions,  

My experience is the part 

> On 14 Dec 2022, at 8:50 pm, Cameron Simpson <cs at cskk.id.au> wrote:
> 
> On 14Dec2022 19:47, mhysnm1964 at gmail.com <mhysnm1964 at gmail.com> wrote:
>> I am trying to navigate a ftp server directory structure to see how big the
>> directory actually is. The function recursively goes through the
>> directories. When I pass the first if test calling the os object. I get a
>> file not found error and it breaks. Everything in the first level directory
>> are directories. I cannot work out what is going wrong.
> [...]
> 
>> from ftplib import FTP
>> import os
>> 
>> def get_size(ftp, directory):
>>   size = 0
>>   ftp.cwd(directory) <ftp://ftp.cwd(directory)>
>>   files = ftp.nlst(b <ftp://ftp.nlst(b>  )
>>   for file in files:
>>       if os.path.isdir(file):
>>           size += get_size(ftp, file)
>>       else:
>>           size += ftp.size(file) <ftp://ftp.size(file)>
>>   return size
> 
> Ignoring syntax errors above, the `os.path.isdir` call checks `file` in the local filesystem, not on the FTP server's file system.
> 
> I don't see a method in the `ftplib` module to check whether a remote path is a directory, but you could try `ftp.cwd(file)` for each name. If that succeeds it should be a directory, and if it fails you could assumes it is a file. I haven't tried this.
> 
> Cheers,
> Cameron Simpson <cs at cskk.id.au>