8253696: WebEngine refuses to load local "file:///" CSS stylesheets when using JDK 15

[arun-joseph]

Issue: In JDK15, URLConnection class overrode the getHeaderFields() methods to return properties, which previously returned an empty map from its super class.

Fix: Extract headers only when it's a HttpURLConnection, otherwise return an empty String.

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
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Issue

• JDK-8253696: WebEngine refuses to load local "file:///" CSS stylesheets when using JDK 15

Reviewers

• Kevin Rushforth (@kevinrushforth - Reviewer)

Download

$ git fetch https://git.openjdk.java.net/jfx pull/314/head:pull/314
$ git checkout pull/314

[bridgekeeper]

👋 Welcome back ajoseph! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[mlbridge]

Webrevs

• 00: Full (54d1f53)

[kevinrushforth]

Looks good. I think a single reviewer is sufficient, unless you want another pair of eyes on it.

[openjdk]

@arun-joseph This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for more details.

After integration, the commit message for the final commit will be:

8253696: WebEngine refuses to load local "file:///" CSS stylesheets when using JDK 15

Reviewed-by: kcr

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 2 new commits pushed to the master branch:

• 5b42b64: 8252236: TabPane: must keep header of selected tab visible
• 77a183e: 8209788: Left/Right/Ctrl+A keys not working in editor of ComboBox if popup showing

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[arun-joseph]

/integrate

[openjdk]

@arun-joseph Since your change was applied there have been 2 commits pushed to the master branch:

• 5b42b64: 8252236: TabPane: must keep header of selected tab visible
• 77a183e: 8209788: Left/Right/Ctrl+A keys not working in editor of ComboBox if popup showing

Your commit was automatically rebased without conflicts.

Pushed as commit 15e52d8.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.