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Posted by rf on July 28, 2007, 10:19 am
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>> > I hear it is possible to disable the web browsers print function
>>
>> You heard wrong.
>
> Bummer, what I heard, well read, exactly is:
>
> Selecting the "Print only blank pages" option will prevent visitors
> from printing your pages. Any time someone uses the print function,
> either the browser will refuse to print (Internet Explorer 4.0 or
> higher) or only a blank page will be output (Netscape Navigator 6.0 or
> higher and Opera 4.0 or higher).
>
> This function works with almost every CSS 2.0-enabled browser. Be
> aware that no warning is given, so users in this scenario may suspect
> a faulty printer or defective software.
>
> source: http://www.aw-soft.com/htmlguard-security.html
Har har.
<oil src='snake'>
To refute the claims made on the abovementioned page:
1. Type some simple javascript into the address bar and the "source" is
immediately visible. The real disadvantage of this approach is that those
with javascript unavailable (estimated to be 10 to 15%) will never see the
page. This is just like turning your server off for the month of December.
2. Tidy (google for it). Tidies things up nicely.
3. Stupid. Never seen a scroll bar?
4. With one mouse click I can disable javascript. Then "no right click"
scripts are disabled. Anyway I don't use my right mouse button to steal
images. I left click/drag/drop them into my image editor. Going to disable
my left mouse button as well?
5. What "block text selection" option. a) Use another browser b)
view:http://url.
6. Most modern browsers dont allow clipboard disablement anyway.
7. Har Har. Disable print? Use another browser or type view:http://url into
your address bar. And what are you going to do once you have printed the
page? Type it into an editor? You don't need a hardcopy for that, just two
windows open.
8. PHP3? Har har. Nothing done server side will stop me from saving your
images. Nothing. Ever heard of Print Screen?
It should be noted that most of the snake oil promulgated by this site
assumes IE. People who would *want* to steal code are the least likely ones
to be using IE.
And those who *can* bypass the trivial barriers and steal the code and use
it would be the very ones who could write it from scratch and do a far
better job.
Finallly:
The desire to hide the HTML behind a page is inversly proportional to the
value of that HTML to anybody else.
</oil>
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