RFR: 8254049: Update WebView to public suffix list 2020-04-24

[Arun Joseph]

On Tue, 27 Oct 2020 00:38:31 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> We should use the public_suffix_list.dat file in the JDK instead. Reading the public_suffix_list.dat file is modified to be similar to [DomainName.java](https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/sun/security/util/DomainName.java). If the file is not present, `isPublicSuffix()` returns `false`, which is similar to how WebKit ignores the public suffix check when it is disabled.
>> 
>> Test: Run PublicSuffixesTest.java
>
> modules/javafx.web/src/main/java/com/sun/webkit/network/PublicSuffixes.java line 132:
> 
>> 130:                 return null;
>> 131:             }
>> 132:             return rulesCache.computeIfAbsent(tld, k -> createRules(tld));
> 
> If the public_suffixes file cannot be loaded (for example, if it is removed from the JDK), then this causes a warning to be logged on every call to this (basically on every load of any web site). It might be better to call `createRules` from a static init block.

If `createRules` is called from a static init block, then all the public suffix rules (for all TLDs) must be loaded during initialization. Another approach would be to set a `fileNotFound` flag which could be set to true in `getPubSuffixStream` and call `Rules.getRules` only when the value is `false`.

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PR: https://git.openjdk.java.net/jfx/pull/324