From Newsgroup: comp.lang.postscript

IrCOm generating a PDF from PostScript. I might generate one, upload it, and have others check it. It might be updated. And re-updated. Then somebody is to print it, and, sometimes, what is printed is a cached old version. Ouch!
One solution rCo rejected for this problem rCo would be to have many separate file names. Not good: there should be a single canonical-seeming file name; and the drafts should not have a permanent life.
A different technique is something I donrCOt know how to do. In the PDF, presumably added via `pdfmark`, could there be something like the following pseudocode?
```
On Open
{
If Today ren HardWiredDateConstantBeingDateOfTasting
{
MessageBoxPopUp
string="This version HardWiredStringConstant: check that is latest with a force-reload."
Buttons={"OK, checked"}
}
}
```
If any readers of comp.lang.postscript know how to pdfmark that, pls do say. Thank you.
Relevant links:
http://github.com/jdaw1/placemat/issues/152 http://www.theportforum.com/viewtopic.php?t=175&p=112066#p112066
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.lang.postscript

On Monday, August 23, 2021 at 5:44:20 PM UTC-5, jdaw1 wrote:

IrCOm generating a PDF from PostScript. I might generate one, upload it, and have others check it. It might be updated. And re-updated. Then somebody is to print it, and, sometimes, what is printed is a cached old version. Ouch!

One solution rCo rejected for this problem rCo would be to have many separate file names. Not good: there should be a single canonical-seeming file name; and the drafts should not have a permanent life.

A different technique is something I donrCOt know how to do. In the PDF, presumably added via `pdfmark`, could there be something like the following pseudocode?

```
On Open
{
If Today ren HardWiredDateConstantBeingDateOfTasting
{
MessageBoxPopUp
string="This version HardWiredStringConstant: check that is latest with a force-reload."
Buttons={"OK, checked"}
}
}
```

If any readers of comp.lang.postscript know how to pdfmark that, pls do say. Thank you.

Relevant links:
http://github.com/jdaw1/placemat/issues/152 http://www.theportforum.com/viewtopic.php?t=175&p=112066#p112066

This might not be very portable, but IIRC with acrobat you can embed JavaScript.
I'm not sure what flavor of JS it uses nor what functions are available.
But, using that you could have a file called maybe "last-revision.txt" with just the
timestamp of the latest version. Then your JS code could fetch the file and compare
to the hard wired constant.
--- Synchronet 3.21d-Linux NewsLink 1.2