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https://github.com/denoland/deno.git
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4e1abb4f3a
To better reflect changes in error types in JS from #3662 this PR changes default error type used in ops from "ErrBox" to "OpError". "OpError" is a type that can be sent over to JSON; it has all information needed to construct error in JavaScript. That made "GetErrorKind" trait useless and so it was removed altogether. To provide compatibility with previous use of "ErrBox" an implementation of "From<ErrBox> for OpError" was added, however, it is an escape hatch and ops implementors should strive to use "OpError" directly.
101 lines
2.7 KiB
Rust
101 lines
2.7 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use crate::op_error::OpError;
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use std::future::Future;
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use std::net::SocketAddr;
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use std::net::ToSocketAddrs;
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use std::pin::Pin;
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use std::task::Context;
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use std::task::Poll;
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/// Resolve network address. Returns a future.
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pub fn resolve_addr(hostname: &str, port: u16) -> ResolveAddrFuture {
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ResolveAddrFuture {
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hostname: hostname.to_string(),
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port,
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}
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}
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pub struct ResolveAddrFuture {
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hostname: String,
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port: u16,
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}
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impl Future for ResolveAddrFuture {
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type Output = Result<SocketAddr, OpError>;
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fn poll(self: Pin<&mut Self>, _cx: &mut Context) -> Poll<Self::Output> {
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let inner = self.get_mut();
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// The implementation of this is not actually async at the moment,
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// however we intend to use async DNS resolution in the future and
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// so we expose this as a future instead of Result.
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// Default to localhost if given just the port. Example: ":80"
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let addr: &str = if !inner.hostname.is_empty() {
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&inner.hostname
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} else {
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"0.0.0.0"
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};
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// If this looks like an ipv6 IP address. Example: "[2001:db8::1]"
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// Then we remove the brackets.
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let addr = if addr.starts_with('[') && addr.ends_with(']') {
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let l = addr.len() - 1;
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addr.get(1..l).unwrap()
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} else {
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addr
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};
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let addr_port_pair = (addr, inner.port);
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let r = addr_port_pair.to_socket_addrs().map_err(OpError::from);
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Poll::Ready(r.and_then(|mut iter| match iter.next() {
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Some(a) => Ok(a),
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None => panic!("There should be at least one result"),
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}))
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use futures::executor::block_on;
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use std::net::Ipv4Addr;
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use std::net::Ipv6Addr;
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use std::net::SocketAddrV4;
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use std::net::SocketAddrV6;
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#[test]
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fn resolve_addr1() {
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let expected =
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SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 80));
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let actual = block_on(resolve_addr("127.0.0.1", 80)).unwrap();
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assert_eq!(actual, expected);
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}
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#[test]
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fn resolve_addr2() {
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let expected =
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SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(0, 0, 0, 0), 80));
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let actual = block_on(resolve_addr("", 80)).unwrap();
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assert_eq!(actual, expected);
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}
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#[test]
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fn resolve_addr3() {
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let expected =
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SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(192, 0, 2, 1), 25));
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let actual = block_on(resolve_addr("192.0.2.1", 25)).unwrap();
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assert_eq!(actual, expected);
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}
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#[test]
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fn resolve_addr_ipv6() {
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let expected = SocketAddr::V6(SocketAddrV6::new(
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Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1),
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8080,
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0,
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0,
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));
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let actual = block_on(resolve_addr("[2001:db8::1]", 8080)).unwrap();
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assert_eq!(actual, expected);
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}
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}
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