[webkit-changes] [WebKit/WebKit] d294c9: [ios] Prioritize text/plain MIME type over file ex...

[Matthew Finkel]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: d294c9bf0f3fe2c7bb92dff5efc544c886001681
      https://github.com/WebKit/WebKit/commit/d294c9bf0f3fe2c7bb92dff5efc544c886001681
  Author: Matthew Finkel <sysrqb at apple.com>
  Date:   2023-07-31 (Mon, 31 Jul 2023)

  Changed paths:
    A LayoutTests/http/tests/mime/resources/.htaccess
    A LayoutTests/http/tests/mime/resources/svg-with-html.svg
    A LayoutTests/http/tests/mime/resources/xml-with-html.xml
    A LayoutTests/http/tests/mime/svg-with-html-expected.txt
    A LayoutTests/http/tests/mime/svg-with-html.html
    A LayoutTests/http/tests/mime/xml-with-html-expected.txt
    A LayoutTests/http/tests/mime/xml-with-html.html
    M Source/WebCore/platform/network/ios/WebCoreURLResponseIOS.mm

  Log Message:
  -----------
  [ios] Prioritize text/plain MIME type over file extension for XML file types
https://bugs.webkit.org/show_bug.cgi?id=257299
rdar://107379119

Reviewed by David Kilzer.

When we receive a file with a text/plain resource, we try harder to find a
better match for the file content, but this can potentially lead to an issue
with some file types like XML. Therefore, if the server says that a file should
be treated as text/plain, and we decide that it is actually XML or SVG, we
prefer using text/plain.

* LayoutTests/http/tests/mime/resources/.htaccess: Added.
* LayoutTests/http/tests/mime/resources/svg-with-html.svg: Added.
* LayoutTests/http/tests/mime/resources/xml-with-html.xml: Added.
* LayoutTests/http/tests/mime/svg-with-html-expected.txt: Added.
* LayoutTests/http/tests/mime/svg-with-html.html: Added.
* LayoutTests/http/tests/mime/xml-with-html-expected.txt: Added.
* LayoutTests/http/tests/mime/xml-with-html.html: Added.
* Source/WebCore/platform/network/ios/WebCoreURLResponseIOS.mm:
(WebCore::shouldPreferTextPlainMIMEType):
(WebCore::adjustMIMETypeIfNecessary):

Originally-landed-as: 259548.786 at safari-7615-branch (c9d2edfda9b0). rdar://107379119
Canonical link: https://commits.webkit.org/266440@main