When I use clap-rs with a field:
#[clap(about = "Socket address to listen")]
and pass "localhost:8888" as the arg, it fails with
error: Invalid value for '<ADDR>': invalid IP address syntax
I notice that it's because
SocketAddr doesn't accept "localhost" as the host. But why? How can I support parsing such endpoint string?
localhost is a domain name, not an IP address. You can utilize
.to_socket_addrs() to perform some basic DNS lookup.
Thanks! We finally use tokio's
TcpListener which internally calls
to_socket_addrs and resolve the domain.
Note that Tokio has a method for resolving the domain directly. It's called
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