Stephen Reese schrieb:
The script below uploads files to a web server. Currently it
overwrites a file if it already exists. I'm instead trying to rename
the old file with an appended date/timestamp before the new file is
uploaded. I *think* I have the idea down but it's not be implemented
in the script correctly. Any hints would be great, thanks.
#!/usr/bin/env python
import cgi, os
import cgitb; cgitb.enable()
#import os.path
import hashlib
import datetime
try: # Windows needs stdio set for binary mode.
import msvcrt
msvcrt.setmode (0, os.O_BINARY) # stdin = 0
msvcrt.setmode (1, os.O_BINARY) # stdout = 1
except ImportError:
pass
form = cgi.FieldStorage()
# Generator to buffer file chunks
def fbuffer(f, chunk_size=10000):
while True:
chunk = f.read(chunk_size)
if not chunk: break
yield chunk
# A nested FieldStorage instance holds the file
fileitem = form['file']
# Test if the file was uploaded
if fileitem.filename:
# Test to determine if file name already exists in destination and
rename if it does exist to include date.
if os.path.isfile(file):
os.rename(file,file + "date")
else:
This isn't working because the else: is dangling. And I think your logic
is flawed (I might be wrong of course) because you rename the *existing*
file instead of giving the new one a new data.
Thus e.g. a link to the file (if it's a webserver) will suddenly deliver
a different file. I doubt that's what you wanted. And you also can only
upload one file per *day*. Which doesn't sound good to me. You should
disambiguate further. And if it's ok to append a date, I suggest you do
that always.
So instead, the logic should be something like this:
import datetime
basename = ... # however you get to that
basename = basename + "_" + datetime.datetime.now().strftime("%Y-%m-%d")
count = 0
filename = basename
while os.path.isfile(filename):
filename = basename + "." + count
count += 1
Diez
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