improve connection to remote #737
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benoitc
commented
Feb 22, 2024
src/hackney_happy.erl
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| ?report_debug("happy eyeballs, try to connect using IPv6", [{hostname, Hostname}, {port, Port}]), | ||
| Self = self(), | ||
| Addrs = getaddrs(Hostname), | ||
| Pid = spawn_link( fun() -> try_connect(Addrs, Port, Opts, Self, {error, nxdomain}) end), |
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no need to spawn here, ,,either wya makes DNS resolution asynchronous.
|
I should provide a way to bypass DNS resolution and allows the user to force the way it wants to make a connection. Also allow them to choose the preference (for those that have to support the legacy with IPv4). |
This was referenced May 10, 2024
This was referenced Jun 19, 2024
ruslandoga
reviewed
Jun 19, 2024
| getaddrs(Hostname) -> | ||
| IP6Addrs = [{Addr, 'inet6'} || Addr <- getbyname(Hostname, 'aaaa')], | ||
| IP4Addrs = [{Addr, 'inet'} || Addr <- getbyname(Hostname, 'a')], | ||
| IP6Addrs ++ IP4Addrs. |
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👋 @benoitc
I wonder if it would make sense to "intersperse" the addresses here like [ipv6, ipv4, ipv6, ipv4, etc.]?
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This change implements the happy eyeballs strategy to bnring better support of IPv6 for hackney. It follows the recommendations iof the RFC 8305. https://datatracker.ietf.org/doc/html/rfc8305
This change allows hackney, to handle the no proxy environnement variable properly. This bbring real full support of proxy setup using environnement.
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This pR track different changes to provide a better UX during connection to remote.