46 lines
1.3 KiB
Text
46 lines
1.3 KiB
Text
import Std.Internal.Async
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import Std.Internal.UV
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import Std.Net.Addr
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open Std.Internal.IO Async
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open Std.Net
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open Std.Net
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def assertBEq [BEq α] [ToString α] (actual expected : α) : IO Unit := do
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unless actual == expected do
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throw <| IO.userError <|
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s!"expected '{expected}', got '{actual}'"
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def timeout [Inhabited α] (a : Async α) (time : Std.Time.Millisecond.Offset) : Async α := do
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let result ← Async.race (a.map Except.ok) (sleep time |>.map Except.error)
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match result with
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| .ok res => pure res
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| .error _ => throw (.userError "timeout")
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def runDNS : Async Unit := do
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let infos ← timeout (DNS.getAddrInfo "google.com" "http") 1000
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unless infos.size > 0 do
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(throw <| IO.userError <| "No DNS results for google.com" : IO _)
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def runDNSNoAscii : Async Unit := do
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let infos ← timeout (DNS.getAddrInfo "google.com▸" "http") 10000
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unless infos.size > 0 do
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(throw <| IO.userError <| "No DNS results for google.com" : IO _)
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def runReverseDNS : Async Unit := do
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let result ← DNS.getNameInfo (.v4 ⟨.ofParts 8 8 8 8, 53⟩)
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assertBEq result.service "domain"
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assertBEq result.host "dns.google"
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#eval runDNS.toIO >>= AsyncTask.block
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/--
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error: invalid argument (error code: 22, name is not ASCII)
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-/
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#guard_msgs in #eval runDNSNoAscii.toIO >>= AsyncTask.block
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#eval runReverseDNS.toIO >>= AsyncTask.block
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