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June 12, 2006

Capture the Clipboard’s Contents

The Win32::Clipboard extension makes it easy
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I have hundreds of Perl scripts that I use. Many of these scripts process some kind of data, such as URLs, email addresses, or paths. Historically, I would write Perl scripts that would obtain this data from an input file or from the keyboard. For example, I would run an application, copy and paste the application's resulting data into an input file, then run a Perl script that read from the input file. One day, however, all this changed. I started using the Win32::Clipboard extension. I can't tell you why it took so long for me to realize a better way of providing input for my Perl scripts. I suppose all that copying and pasting never really bothered me enough to do something about it.

With the Win32::Clipboard extension, the way I provide input to scripts has changed. For example, I have one script that formats network packets captured by the Ethereal network tracing program. When network traffic is captured, all I need to do is copy a particular packet to the Windows Clipboard. The script continuously monitors the Clipboard for changes. When a change is detected, the script retrieves the packet of data from the Clipboard, decodes it, and formats it so that it's legible to humans. The script then writes the formatted data back to the Clipboard. Therefore, with this script, all I need to do is run Ethereal, copy a packet to the Clipboard, then paste the formatted results into an email or a report. . . .

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