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abe8a113ad
This is in preperation for dynamic import (#1789), which is more easily implemented when errors are dynamic.
132 lines
3.3 KiB
Rust
132 lines
3.3 KiB
Rust
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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use crate::deno_error;
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use deno::ErrBox;
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use futures::Async;
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use futures::Future;
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use futures::Poll;
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use std::net::SocketAddr;
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use std::net::ToSocketAddrs;
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/// Go-style network address parsing. Returns a future.
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/// Examples:
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/// "192.0.2.1:25"
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/// ":80"
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/// "[2001:db8::1]:80"
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/// "198.51.100.1:80"
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/// "deno.land:443"
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pub fn resolve_addr(address: &str) -> ResolveAddrFuture {
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ResolveAddrFuture {
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address: address.to_string(),
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}
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}
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pub struct ResolveAddrFuture {
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address: String,
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}
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impl Future for ResolveAddrFuture {
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type Item = SocketAddr;
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type Error = ErrBox;
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fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
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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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match split(&self.address) {
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None => Err(deno_error::invalid_address_syntax()),
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Some(addr_port_pair) => {
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// I absolutely despise the .to_socket_addrs() API.
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let r = addr_port_pair.to_socket_addrs().map_err(ErrBox::from);
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r.and_then(|mut iter| match iter.next() {
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Some(a) => Ok(Async::Ready(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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}
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}
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fn split(address: &str) -> Option<(&str, u16)> {
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address.rfind(':').and_then(|i| {
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let (a, p) = address.split_at(i);
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// Default to localhost if given just the port. Example: ":80"
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let addr = if !a.is_empty() { a } else { "0.0.0.0" };
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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 p = p.trim_start_matches(':');
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match p.parse::<u16>() {
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Err(_) => None,
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Ok(port) => Some((addr, port)),
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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 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 split1() {
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assert_eq!(split("127.0.0.1:80"), Some(("127.0.0.1", 80)));
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}
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#[test]
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fn split2() {
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assert_eq!(split(":80"), Some(("0.0.0.0", 80)));
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}
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#[test]
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fn split3() {
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assert_eq!(split("no colon"), None);
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}
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#[test]
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fn split4() {
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assert_eq!(split("deno.land:443"), Some(("deno.land", 443)));
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}
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#[test]
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fn split5() {
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assert_eq!(split("[2001:db8::1]:8080"), Some(("2001:db8::1", 8080)));
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}
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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 = resolve_addr("127.0.0.1:80").wait().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 = resolve_addr("192.0.2.1:25").wait().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 = resolve_addr("[2001:db8::1]:8080").wait().unwrap();
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assert_eq!(actual, expected);
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}
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}
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