[Webkit-unassigned] [Bug 193902] New: [Resource Timing] Should surface entries for failed requests (DNS, TCP, SSL, 4xx, 5xx)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=193902

            Bug ID: 193902
           Summary: [Resource Timing] Should surface entries for failed
                    requests (DNS, TCP, SSL, 4xx, 5xx)
           Product: WebKit
           Version: Safari 12
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nic at nicj.net

This is a request for an un-do of https://bugs.webkit.org/show_bug.cgi?id=104762

Per the latest ResourceTiming (Level 2) spec:

https://www.w3.org/TR/resource-timing-2/#resources-included-in-the-performanceresourcetiming-interface

> If a resource fetch was aborted due to a networking error (e.g. DNS, TCP, or TLS error), then the fetch MAY be included as a PerformanceResourceTiming object in the Performance Timeline with initialized attribute values up to the point of failure - e.g. a TCP handshake error should report DNS timestamps for the request, and so on.

While the language says MAY, I'm requesting that failed entries (transport-level and HTTP 4xx/5xx) be included in ResourceTiming in Safari.

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