Base64 encode url to bypass some filters

[FadeFADev]

Some filters will look for key words in the url this can be bypassed by encoding the part of the url.

ex:
before: http://cord-spell.glitch.me/get/http://test/
after: http://cord-spell.glitch.me/get/aHR0cDovL3Rlc3Qv

[nfriedly]

Yea, a couple of folks have asked about this before. It's not a bad idea, just a fair amount of effort, and it will somewhat reduce the functionality of the proxy because relative URLs and javascript-generated URLs won't work as reliably. It's on my todo list, though - https://github.com/nfriedly/node-unblocker/wiki/Todo#base64

[wapfalls]

Any plans on implementing this feature? will be a great addon to bypass most filters :)

[wapfalls]

Am wondering what proxy script this website uses, (freevideoproxy . com), they somehow managed to encode urls

[nfriedly]

Probably not any time soon :(

If you want to, though, you can give it a shot.

[wapfalls]

Probably not any time soon :(

If you want to, though, you can give it a shot.

Can you give some pointers at high level, on what changes to be made in what files, so I will have a look.

Thanks

[nfriedly]

Sure.

You'll probably use the atob() and btoa() methods that are built-in to JavaScript to do the encoding and decoding: https://developer.mozilla.org/en-US/docs/Glossary/Base64

First you'll want to base-64 encode the url on the home page form. If you're using the nodeunblocker.com codebase, that'd be here: https://github.com/nfriedly/nodeunblocker.com/blob/master/public/index.html#L112

And, then decode it on the server here: https://github.com/nfriedly/node-unblocker/blob/master/lib/get-real-url.js

And, finally, when re-writing URLs, you'll want to encode them here: https://github.com/nfriedly/node-unblocker/blob/master/lib/url-prefixer.js#L35

That should cover the basics, but I imagine there are going to be a lot of edge cases, such as the aforementioned ones with relative URLs and javascript-generated URLS. So you'll probably have to make the getRealUrl() method able to handle it both ways. I'm not sure what else will come up, but there may be some other issues. You can let me know if you get stuck.

You'll also want to make it configurable and off by default so that the tests don't all start failing. (And, then add new tests where it's turned on to make it continue to work.)

[wapfalls]

@nfriedly Thanks for detailing the steps, Will give it a try and let you know if I get stuck somewhere :)