[wp-trac] [WordPress Trac] #37763: Target server overload due to invalid RSS feed URL in RSS widget

[WordPress Trac]

#37763: Target server overload due to invalid RSS feed URL in RSS widget
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 Reporter:  bstovall       |       Owner:  stevenkword
     Type:  defect (bug)   |      Status:  assigned
 Priority:  normal         |   Milestone:  Awaiting Review
Component:  Feeds          |     Version:  4.6
 Severity:  normal         |  Resolution:
 Keywords:  needs-testing  |     Focuses:  performance
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Comment (by stevenkword):

 On second thought, that would only prevent the problem if you hit a
 `/feed/` or `?feed` URL.  If you actually hit any other page belonging to
 the same site as the widget, the problem would still occur.  Short-
 circuiting `is_404()` wouldn't prevent the problem either if say the URL
 of `example.com/hello-world` was entered as the feed source.  You will get
 the notice in the widget that notifies you the feed is invalid, but if it
 were currently valid and then not valid in the future, the problem would
 persist.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37763#comment:9>
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