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net/url: fix missing handling for opaque value in ResolveReference method

The current implementation doesn't resolve as per spec RFC 3986 the case
where the base URL has an opaque value, and the reference doesn't have
either a scheme, authority or path. Currently, this specific case falls
back to the "abs_path" or "rel_path" cases, where the final path results
of the base_path being resolved relatively to the reference's, but since
the opaque value is stored independently, it needs a case of its own.

The algorith for resolving references is defined in RFC 3986 section 5.2.2:
https://www.rfc-editor.org/rfc/rfc3986.html#section-5.2.2

Fixes #66084

Change-Id: I82813e2333d8f2c4433c742f10e8c941888b55ac
GitHub-Last-Rev: cb96626988
GitHub-Pull-Request: golang/go#66415
Reviewed-on: https://go-review.googlesource.com/c/go/+/572915
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
This commit is contained in:
Fábio Mata 2024-03-19 22:58:26 +00:00 committed by Damien Neil
parent a8eaf56fe1
commit cf06b1f1db
2 changed files with 15 additions and 0 deletions

View File

@ -1124,6 +1124,13 @@ func (u *URL) ResolveReference(ref *URL) *URL {
url.RawFragment = u.RawFragment
}
}
if ref.Path == "" && u.Opaque != "" {
url.Opaque = u.Opaque
url.User = nil
url.Host = ""
url.Path = ""
return &url
}
// The "abs_path" or "rel_path" cases.
url.Host = u.Host
url.User = u.User

View File

@ -1248,6 +1248,14 @@ var resolveReferenceTests = []struct {
// Empty path and query but with ForceQuery (issue 46033).
{"https://a/b/c/d;p?q#s", "?", "https://a/b/c/d;p?"},
// Opaque URLs (issue 66084).
{"https://foo.com/bar?a=b", "http:opaque", "http:opaque"},
{"http:opaque?x=y#zzz", "https:/foo?a=b#frag", "https:/foo?a=b#frag"},
{"http:opaque?x=y#zzz", "https:foo:bar", "https:foo:bar"},
{"http:opaque?x=y#zzz", "https:bar/baz?a=b#frag", "https:bar/baz?a=b#frag"},
{"http:opaque?x=y#zzz", "https://user@host:1234?a=b#frag", "https://user@host:1234?a=b#frag"},
{"http:opaque?x=y#zzz", "?a=b#frag", "http:opaque?a=b#frag"},
}
func TestResolveReference(t *testing.T) {