[Webkit-unassigned] [Bug 152457] New: CFNet backend proxy detection is not very good

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152457

            Bug ID: 152457
           Summary: CFNet backend proxy detection is not very good
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Mac OS X 10.11
            Status: NEW
          Severity: Minor
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com

To determine whether or not to perform DNS prefetch, the CFNet backend checks the system proxy settings once every five seconds to determine whether a proxy would be used to load http://example.com/ or https://example.com/; see platform/network/DNSResolveQueue.cpp and platform/network/cf/DNSCFNet.cpp. This is not ideal, since if a proxy is configured for only a particular domain, then WebKit could perform DNS prefetch for that domain, defeating the (privacy) purpose of having selected the proxy. It would be better if it were possible to ask the system if it's possible that a proxy could be used on *any* site, and if so, disable prefetch globally. (Checking proxy settings for every prefetch is probably undesirable as that could cause a performance regression.)

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20151219/101846f8/attachment.html>