RFR: 8272758: Improve HttpServer to avoid partial file name matches while mapping request path to context path

[Volkan Yazici]

On Fri, 16 Jan 2026 08:07:48 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

> Currently `HttpServer` allows matching a request path `/foobar` to context path `/foo`. Replace this surprising behaviour with a safer approach by disallowing partial file name matches.
> 
> 
>          |           Request path
>  Context +------+-------+----------+---------
>   path   | /foo | /foo/ | /foo/bar | /foobar
> ---------+------+-------+----------+---------
>  /       |   Y  |   Y   |     Y    |    Y
>  /foo/   |   N  |   Y   |     Y    |    N

test/jdk/java/net/httpclient/PlainProxyConnectionTest.java line 1:

> 1: /*

Surprisingly, this is *the only test* that failed due to this change, and, IMHO, this is a typo in the test. That is, the test author actually wanted to introduce the `x` prefix to the URI to exactly avoid the problem we're trying to solve in this PR, yet he/she unintentionally fell into the trap.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29264#discussion_r2697436911