Control IP version of URLSession

Question

Created Aug ’20

Replies 3

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When connecting to a URL using URLSession, is it possible to somehow control if URLSession should pick an IPv4 or IPv6 address?

I have a URL and I need to make two connections to the URL, one using IPv4 and one using IPv6. The DNS name used in the URL resolves to both IPv4 and IPv6 addresses and I can't change this.

Is there any way to affect which IP version (or IP number in general) that URLSession picks when resolving the name?

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Answer 1

DTS Engineer OP

Apple

Aug ’20

When connecting to a URL using URLSession, is it possible to somehow
control if URLSession should pick an IPv4 or IPv6 address?

Not really. You could build the URL to reference the IP address rather than the DNS name, but that won’t work in all situations.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"

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Answer 2

Stripe68 OP

Sep ’20

I ended up using a third party WebSocket library.

It would be good if we were able to change the Host header of the URLRequest when the URL itself contains an IP number instead of a DNS name.

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Answer 3

DTS Engineer OP

Apple

Sep ’20

It would be good if we were able to change the Host header of the
URLRequest when the URL itself contains an IP number instead of a
DNS name.

I’ve seen other folks offer similar opinions, and my recommendation is that you file an enhancement request along those lines.

Please post your bug number, just for the record.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"

0