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@ -10,15 +10,27 @@ import ( |
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"context" |
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"fmt" |
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"net" |
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"runtime" |
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"sync" |
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"time" |
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"golang.org/x/sync/singleflight" |
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) |
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var single = &Resolver{ |
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Forward: &net.Resolver{PreferGo: true}, |
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} |
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var single = func() *Resolver { |
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r := &Resolver{ |
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Forward: &net.Resolver{PreferGo: true}, |
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} |
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// There does not appear to be a local resolver running
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// on iOS, and NetworkExtension is good at isolating DNS.
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// So do not use the Go resolver on macOS/iOS.
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if runtime.GOOS == "darwin" { |
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r.Forward.PreferGo = false |
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} |
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return r |
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}() |
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// Get returns a caching Resolver singleton.
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func Get() *Resolver { return single } |
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