On Mon, 3 Oct 2022 13:35:26 GMT, Daniel Fuchs <dfu...@openjdk.org> wrote:

> Many built-in URL Handlers perform additional syntax checking on the URL when 
> `URLStreamHandler::openConnection` / connect is called. In some cases, some 
> of these checks could be also performed earlier, when 
> `URLStreamHandler::parseURL` is called.
> 
> This fix proposes to slightly modify the behavior of JDK built-in URL 
> handlers to perform these checks early, and throw `MalformedURLException` 
> earlier, at URL construction time, when that is possible, instead of delaying 
> until `URL::openConnection` or `URLConnection::connect` are called.
> 
> Because java.net.URL constructors are already specified to throw 
> `MalformedURLException` in such cases, no API documentation changes are 
> necessary. 
> 
> A new JDK specific system property `-Djdk.net.url.delayParsing` or 
> `-Djdk.net.url.delayParsing=true` can be specified on the command line to 
> revert to the previous behavior. By default, the property is not set, and the 
> new behavior is in place. The property can be specified on the java command 
> line if unexpected regressions are observed.
> 
> The new property will be documented in release notes, and may be removed in a 
> future release.
> 
> CSR: https://bugs.openjdk.org/browse/JDK-8294592

The changes look fine to me.

-------------

Marked as reviewed by jpai (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10534

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