How can I get an alert when changes to an online PDF have occurred? Simple solutions will carry the day.
Do this once:
wget -O file.pdf http://example.com/file.pdf md5sum file.pdf > file.md5
The set this up in a cron job:
wget -O file.pdf http://example.com/file.pdf md5sum -c file.md5
Of course, you'll need to modify the paths in the code sample so that the
wget and md5sum commands can find the downloaded file. If md5sum does no report OK, then you know the file has changed. Have your script send an alert email or take some other action. (You didn't mention your OS so I answered on how I would do it on Linux.)
Super easy to do with Visualobserver.com
Works like this:
- Add URL of PDF
- Select Part you want to monitor
- Select frequency (How often you want to monitor?)
- Select Alerts (When do you want to get alerted?