Quite frequently I come across scanned books that are viewable for free online. For example, the publisher put them there (such as preview chapters), a library (old books from their collection that are in public domain), etc. Since I like hoarding data, and the online viewers that are used to present the book to me might not be very practical, I frequently try to download the books one way or another. This requires toying with the "inspect element" tool and various other methods of getting the images/PDF. Now, all that I access is what is, well, accessible; I don't hack into the servers or something. But - the stuff is meant to be hidden from the normal user. Does that act of hiding the material, no matter how primitive and easily circumvented, mean that I'm not allowed to access it at all?
I suppose ripping a public domain book is no big deal, but would books under copyright fare differently?
Mainly I'm asking out of curiosity, I don't expect the police to come visit me for ripping a 16th century dictionary.
Note: I live in EU, but I'd be curious to hear how this is treated elsewhere too.
Edit: I also remembered a funny trick I noticed on one site - it allows viewing PDFs on their website, but not downloading, unless you pay for the PDF. But when you load the page, even without paying, the PDF is already downloaded onto your computer and can be found in the browser cache. Is it legal to simply save the file that is already on your computer?
Mind posting a guide on how you tinker with those inspect element tools?
Right click -> inspect element (Q) works.
You can also press F12.
And if right click is blocked, on Firefox holding SHIFT will unblock right click. There is also a plugin that does this for you.
Often websites will put an invisible element in front of the content to intercept this trick, but you can navigate through the elements to find the one they were trying to obfuscate.
Also you can just block elements you right click on in Firefox (though this might be an option added by an add-on). If there's hidden elements you just need to go through each of those until you can click on the one you want directly (and you can tell by what is highlighted in the inspect element mode).
You can also hit delete in inspect element mode to remove that element. You can also edit whatever you want in the element. Makes me wish it existed back when I was doing more web dev work, would have made things a lot easier when debugging.
(Sorry for the late response.) Well it depends a lot on the site. Since I focus on books and scholarly articles, the ideal way is to find the URL of the original PDF. The website might show you just individual pages as images, but it might hide the link to the PDF somewhere in the code. Alternatively, you might just obtain all the URLs of the individual page images, put them all into a download manager, and later bundle them all into a new PDF. (When you open the "inspect element" window, you just have to figure out which part of the code is meant to display the pages/images to you.) Sometimes the PDFs and page images can be found in your browser cache, as I mention in the OP. There's quite some variety among the different sites, but with even the most rudimentary knowledge of web design you should be able to figure out most of them.
If need help with ripping something in particular, DM me and I'll give it a try.