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Re: [Bug-wget] downloading a file from a web (updated every 24 hours)

From: formes01
Subject: Re: [Bug-wget] downloading a file from a web (updated every 24 hours)
Date: Tue, 09 Dec 2008 17:23:46 +0500
User-agent: Opera Mail/9.62 (Win32)

hours on the server.  What I would like to do is to add a -wget- bat
file in the startup menu of windows, and then, every time I start the
computer the -wget- should (1) check with the file on the server and
see if a copy has been downloaded; if not, download the file and keep

Bash script can help you. Example
(for it to run on Windows you need the following cygwin packages: cygwin, coreutils, wget and either associate .sh extension with bash, or create a shortcut to bash with a parameter):

if [ \
"`date -u -r <YOUR_FILE> +'  Last-Modified: %a, %d %b %Y %X GMT'`" \
!= \
"`wget -S --spider $url 2>&1 | grep Last`" \
]; then
mv $fn `date +'%m%d%y'`-$fn
wget $url
; fi

Assuming the file already exists in current directory.
This script compares last modification time of <YOUR_FILE> and <URL_TO_YOUR_FILE>. If they're not equal, existing file is renamed and a new file is downloaded.

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