If the .Read()
method of a net.Conn
returns an error, does this imply that future reads also will fail with an error? Or are there recoverable errors? If so, how do I know whether/when to retry reads?
net.Conn是否存在可恢复的读取错误?
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- doushan6692 2019-09-13 13:31关注
See the specific error type of the net package https://golang.org/pkg/net/#OpError
It provides a specific
Temporary()
method to figure out if it is a non-terminal error.To manually figure out which error is
Temporary
you have to go through each defined error within the net, os and some other internal packages.To programmatically check for a temporary error, you might declare your own local
temporary interface{ Temporary() bool }
, or you can rely on this interface provided by the net package https://golang.org/pkg/net/#ErrorThe
OpError.Temporary
method test if its internal error implements thenet.temporary
interface (https://golang.org/src/net/net.go?s=16056:16090#L501), and if so returns the result of the call toTemporary()
of the internal error, for example https://golang.org/src/net/net.go?s=19122:19157#L605.I am unsure which read retry you are thinking about, however, internal fd.read methods implements retries for eagain https://golang.org/src/internal/poll/fd_unix.go#L165
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