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net: JoinHostPort should not enclose non-IP literals in square brackets #18059

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mikioh opened this issue Nov 27, 2016 · 3 comments
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net: JoinHostPort should not enclose non-IP literals in square brackets #18059

mikioh opened this issue Nov 27, 2016 · 3 comments
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Go1.9

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@mikioh
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mikioh commented Nov 27, 2016 •
edited

Looks like I forgot to add a test case. As per https://tools.ietf.org/html/rfc4007 (and considering https://tools.ietf.org/html/rfc6874 for the interoperability of the output of JoinHostPort), JoinHostPort should not enclose any non-IP literal in square brackets, and remove any scope zone identifier if necessary for avoiding ambiguity.

For example,

package main

import (
	"fmt"
	"net"
)

func main() {
	// /etc/hosts should have an entry mapping "locahost" to "::1".
	for _, host := range []string{"localhost", "::1", "::1%lo0", "localhost%lo0"} {
		fmt.Println(net.JoinHostPort(host, ""))
	}

	// Output:
	// localhost:
	// [::1]:
	// [::1%lo0]:
	// localhost: not [localhost%lo0]:
}
@mikioh mikioh added this to the Go1.9 milestone Nov 27, 2016
@mikioh mikioh mentioned this issue Nov 27, 2016
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@kavirajk
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@mikioh Sorry this may sound stupid. How do we identify non-IP literal? both "::1%lo0", "localhost%lo0" seems to be invalid.

@kavirajk
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@mikioh got it. "localhost" is not a valid ipv6 address.

@gopherbot
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CL https://golang.org/cl/40510 mentions this issue.

gopherbot pushed a commit that referenced this issue Jun 14, 2017
@bradfitz
net, doc: document JoinHostPort change in release notes, clarify its …
2f55031 
…docs

Updates #18059
Updates #20587

Change-Id: Icbb4c7cb201ac51d2cc6066620b47ba09ff6fe65
Reviewed-on: https://go-review.googlesource.com/45780
Reviewed-by: Chris Broadfoot <cbro@golang.org>
@golang golang locked and limited conversation to collaborators Apr 14, 2018
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