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Allow uppercase characters in hostnames

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This allows hostnames to contain uppercase characters, matching behavior
in Docker versions before 1.10. It does not attempt to canonicalize
hostnames into a lowercase format before parsing, since this could lead
to corner cases (for example, making Hostname.Domain.Com/ref ambiguous
on a daemon which contains references for both hostname.domain.com/ref
and Hostname.Domain.Com/ref).

Fixes: #1433

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2016-02-05 16:00:12 -08:00
parent 5e4ea38a2f
commit 950d34d210
3 changed files with 14 additions and 2 deletions
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2
reference/reference.go
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@ -6,7 +6,7 @@
// reference := repository [ ":" tag ] [ "@" digest ]
// name := [hostname '/'] component ['/' component]*
// hostname := hostcomponent ['.' hostcomponent]* [':' port-number]
// hostcomponent := /([a-z0-9]|[a-z0-9][a-z0-9-]*[a-z0-9])/
// hostcomponent := /([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9-]*[a-zA-Z0-9])/
// port-number := /[0-9]+/
// component := alpha-numeric [separator alpha-numeric]*
// alpha-numeric := /[a-z0-9]+/