add support IPv6 hostname

[taisukef]

on previous version

wws --host "[::]"

Error: Custom { kind: Uncategorized, error: "failed to lookup address information: nodename nor servname provided, or not known" }

[vmwclabot]

@taisukef, VMware has approved your signed contributor license agreement.

[ereslibre]

Thank you @taisukef. I cannot reproduce this issue neither at main or with the 0.5.0 released version.

[Angelmmiguel]

Hello @taisukef,

I checked the issue with @ereslibre and we were able to reproduce the issue. The current version works fine on Linux, but we get the same error you are pointing out in macOS. I also found a similar a related issue in actix-web, the framework we're using to manage the HTTP requests (actix/actix-web#1320).

The proposed solution in that issue looks similar to your PR. For us, it seems the bind method should be the one dealing with this case. Let us revisit the bind definition at actix-web and we will sync on the PR with you for the final solution.

Meanwhile, you can use the "extended" IPv6 for localhost:

wws --host "0:0:0:0:0:0:0:1"

Thank you for your PR!

[ereslibre]

As @Angelmmiguel said we could reproduce this both on Mac OS X and GNU/Linux. Only that it was taking a while to bind so I could not see the error after certain time had passed.

Thanks for the contribution @taisukef! LGTM

[Angelmmiguel]

Approved too! Thanks for your contribution :)