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62 lines
1.2 KiB
Groff
62 lines
1.2 KiB
Groff
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.\" generated with Ronn/v0.7.3
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.\" http://github.com/rtomayko/ronn/tree/0.7.3
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.
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.TH "COREDNS\-CANCEL" "7" "March 2019" "CoreDNS" "CoreDNS plugins"
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.
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.SH "NAME"
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\fIcancel\fR \- a plugin that cancels a request\'s context after 5001 milliseconds\.
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.
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.SH "DESCRIPTION"
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The \fIcancel\fR plugin creates a canceling context for each request\. It adds a timeout that gets triggered after 5001 milliseconds\.
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.
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.P
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The 5001 number is chosen because the default timeout for DNS clients is 5 seconds, after that they give up\.
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.
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.P
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A plugin interested in the cancellation status should call \fBplugin\.Done()\fR on the context\. If the context was canceled due to a timeout the plugin should not write anything back to the client and return a value indicating CoreDNS should not either; a zero return value should suffice for that\.
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.
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.IP "" 4
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.
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.nf
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cancel [TIMEOUT]
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.
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.fi
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.
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.IP "" 0
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.
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.IP "\(bu" 4
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\fBTIMEOUT\fR allows setting a custom timeout\. The default timeout is 5001 milliseconds (\fB5001 ms\fR)
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.
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.IP "" 0
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.
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.SH "EXAMPLES"
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.
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.nf
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\&\. {
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cancel
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whoami
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}
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.
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.fi
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.
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.P
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Or with a custom timeout:
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.
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.IP "" 4
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.
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.nf
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\&\. {
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cancel 1s
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whoami
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}
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.
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.fi
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.
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.IP "" 0
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.
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.SH "ALSO SEE"
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The Go documentation for the context package\.
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