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* plugin/cancel: add context cancelation plugin Per review comments on #2704, move this into a plugin that gets called. Add the most minimal plugin, tests and documenation. Signed-off-by: Miek Gieben <miek@miek.nl> * plugin/cache: add timeout option review feedback: add option to set custom timeout. Signed-off-by: Miek Gieben <miek@miek.nl> * spelling Signed-off-by: Miek Gieben <miek@miek.nl>
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cancel
Name
cancel - a plugin that cancels a request's context after 5001 milliseconds.
Description
The cancel plugin creates a canceling context for each request. It adds a timeout that gets triggered after 5001 milliseconds.
The 5001 number is chosen because the default timeout for DNS clients is 5 seconds, after that they give up.
A plugin interested in the cancellation status should call plugin.Done() 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.
cancel [TIMEOUT]
- TIMEOUT allows setting a custom timeout. The default timeout is 5001 milliseconds (
5001 ms)
Examples
. {
cancel
whoami
}
Or with a custom timeout:
. {
cancel 1s
whoami
}
Also See
The Go documentation for the context package.