[rfc][icedtea-web] fix for PR1465 - java.io.FileNotFoundException while trying to download a JAR file

[Adam Domurad]

On 06/04/2013 09:31 AM, Jiri Vanek wrote:
> Although not nice, not even bad.
>
> tbh this was  known issue, and when sad was pushing his patch we 
> decided to ignore %20 and + similarity under html encoding, and 
> difference under RFC2396.
> Apearently, wrongly.
>
> J.

I have done some research and I think I found a solution that should be 
pleasing. See the unit tests in the patch, too.

Basically new URI(url) will check RFC2396 validity.
See http://stackoverflow.com/questions/304806/encode-and-decode-rfc2396-urls

This avoids the whole normalization mess if the URL is already valid. As 
long as we create URLs in a manner that ensures they are correct, this 
will be preserved.
This should reduce the future chance of unintended icedtea-web quirks, too.

Happy hacking,
-Adam
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