473,705 Members | 3,580 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

ftplib help - delete from server after download results in 0-byte file

Got a strange scenario going on here in that I could have sworn this worked
yesterday. I am issuing binary retrieval calls to an FTP server, writing to a
file, close the file, then removing the file from the remote site. When I do
this, I end up with 0 byte files. I was hoping to avoid parsing a list of
remote and local files and matching them up that way because it would be easier
to remove on successful retrieve. I'm including some sample code and really
hoping someone can point out where I'm messing up.

Thanks.
import os, ftplib
DPI = "C:/DestinationFold er/"
#Actually named different in code, but shorter for reading here.
#Note - objFTP is already opened - this is not the issue.

objFTP.cwd("/ksdata_in")

#I'm open to better ways to do this. Can't use nlst if empty.
TestDir = objFTP.dir()
if TestDir <> None:
FTPRemoteList = objFTP.nlst()

#If the remote file is type SEM or PGP, do this.
for filename in [filename for filename in FTPRemoteList if \
(os.path.splite xt(filename)[1] in [".sem",".SEM"," .PGP",".pgp"])]:
try:
DestinationFile = open(os.path.jo in(DPI, filename), "wb")
print DestinationFile
objFTP.retrbina ry("RETR " + filename, DestinationFile .write)
SQLLogging.LogF TP(filename, CompanyInput, 1, 'ToDrive')
DestinationFile .close()

#This is the culprit. When this is active, it writes a 0 byte file locally
# and deletes the file on the server.
#objFTP.delete( filename)
except:
SQLLogging.LogF TP(filename, CompanyInput, 0, 'ToUs')
print Exception
#This is my workaround in the meantime. If I've downloaded the files, get
#another remote listing and delete and files from remote that are downloaded
#locally and larger than 1Kbish for PGP files. SEM files are 0 bytes.

TestDir = objFTP.dir()
if TestDir <> None:
FTPRemoteList = objFTP.nlist()
for filename in FTPRemoteList:
if os.path.isfile( os.path.join(Do wnloadedPathInp ut, filename)) and \
os.path.splitex t(filename)[1] in [".pgp",".PG P"] and \
os.stat(os.path .join(Downloade dPathInput, filename))[6] > 1000:
objFTP.delete(f ilename)
if os.path.isfile( os.path.join(Do wnloadedPathInp ut, filename)) and \
os.path.splitex t(filename)[1] in [".SEM",".se m"]:
objFTP.delete(f ilename)

Jul 18 '05 #1
0 1829

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

3
19836
by: python | last post by:
Hi: I want to write a procedure to automatically upload some files for me, but I'm getting stuck. Before I write my own gruesome put() function, I wanted to check if there is an easier way. Here's what I can do so far: >>>import ftplib >>>conn = ftplib.FTP('ftp.example.com') >>>conn.login(user='userid', passwd='passwd')
1
1771
by: John fabiani | last post by:
Hi, I have a script that is not running on a freeBSD 4.4 with Python 2.1 that uses ftplib. I'm wondering if it's possible to update only the ftplib module from 2.1 to 2.3. I only ask because I have no idea how to upgrade anything for freeBSD 4.4. I know there is are doc's available but I sure don't want to screw anything up on the freeBSD 4.4 server because I didn't understand what I was doing. Thanks John
0
1661
by: Mikael | last post by:
Hello, I am using the ftplib.FTP.nlst() method to list the files in a directory on a FTP server. But when the directoty is empty, python raises an error: ftplib.error_perm: 550 No files found. I find this behaviour very strange. Why not simply return an empty list?
0
1078
by: Beeyah | last post by:
in my inability to find a working ftp program for my mac, i decided to write one in python. i wrote a class (link at end of post) that inherited ftplib.FTP and made the process slightly less involved, but it brought up a few questions: using the sendcmd() method to do a simple "LIST" command returns an error explaining that a data connection could not be opened, just as if you connected to a ftp server using telnet. so, you use the...
2
2948
by: Matija Papec | last post by:
I would like to reimplement ftplib "nlst" using ftplib.dir (ftp server doesn't support nlst) so I'm trying to guess how to use ftp callbacks. Any help is appreciated. tia! ============ #!/usr/bin/python # nlst vs list
1
1789
by: Peter A. Schott | last post by:
Using ftplib.FTP object for a project we have here to upload/download files. I know that I can wrap everything in try/except blocks, but I'm having trouble getting the exact error messages out of the Exceptions. I'd like to either send an e-mail or log the failure to a database. It would also be nice to see what the message is and perhaps add some additional logic for delay/retry or something similar. Has anyone done any of the...
1
1365
by: eight02645999 | last post by:
hi my purpose is just to connect to an FTP server and delete all files in a directory Is there a way using ftplib module? something like ftp.delete("*") ? another way i can do is using LIST to list out all the files in that directory, grab the filename, append to an array, then do a for loop to delete one by one. using the ftplib retrlines('LIST') , it shows me all the lines with -rw-r--r-- 1 user grp 6302 Apr 7 15:30 some...
0
978
by: vedran | last post by:
Hello, One simple question.Which security ftplib support,and how to I 'load' these security to ftputil. (Please don't give me security modules) e.g. ftp=FTPHost('myhost','myusername','mypassword',session_factory=ftplib.FTP)
1
6090
by: loial | last post by:
Trying to use ftplib.FTP.nlst() method to list the files in a directory on a FTP server. It works fine except when there are no files in the directory. Then it gives the error ftplib.error_perm: 550 No files found. How can I handle this cleanly?
1
4125
by: Laszlo Nagy | last post by:
Hi All, I'm using a simple program that uploads a file on a remote ftp server. This is an example (not the whole program): def store(self,hostname,username,password,destdir,srcpath): self.ftp = ftplib.FTP(hostname) self.ftp.login(username,password) self.ftp.set_pasv(False)
0
8767
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
8689
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
9273
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
9136
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
9030
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
7893
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
5933
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
4703
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
3137
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.