[Webkit-unassigned] [Bug 42500] New: HTMLLinkElement ignores dnsPrefetchingEnabled setting

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=42500

           Summary: HTMLLinkElement ignores dnsPrefetchingEnabled setting
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: opendarwin at lapcatsoftware.com


A setting to disable DNS prefetching was landed in svn r62284:

http://trac.webkit.org/changeset/62284/trunk

DNS prefetching is done by the ResourceHandle::prepareForURL() function. Most calls to prepareForURL() are protected by a check of whether DNS prefetching is enabled. However, HTMLLinkElement does not perform such a check:

https://trac.webkit.org/browser/trunk/WebCore/html/HTMLLinkElement.cpp

193    if (m_relAttribute.m_isDNSPrefetch && m_url.isValid() && !m_url.isEmpty())
194        ResourceHandle::prepareForURL(m_url);

A check should be added here to make sure DNS prefetching is enabled before triggering DNS prefetching.

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