From 779f705d5cabc7662b0dd2e18a82cbb978c9f86a Mon Sep 17 00:00:00 2001
From: oppiliappan <me@oppi.li>
Date: Sun, 16 Nov 2025 05:56:12 +0000
Subject: [PATCH] Allow matching multiple subdomains in wildcards

Previously, this method would match only hosts of the form:

    user.host.com

This changeset allows matches on hosts of the form:

    user.org.host.com
    user.organization.com.host.com

This will potentially be the pattern that tangled.org uses for its hosted
instance of git-pages.

Signed-off-by: oppiliappan <me@oppi.li>
---
 src/wildcard.go | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/wildcard.go b/src/wildcard.go
index 64033b0..4c1a179 100644
--- a/src/wildcard.go
+++ b/src/wildcard.go
@@ -34,10 +34,27 @@ func (pattern *WildcardPattern) GetHost() string {
 // corresponding to the * in the domain pattern.
 func (pattern *WildcardPattern) Matches(host string) (string, bool) {
 	hostParts := strings.Split(host, ".")
-	if len(hostParts) != 1+len(pattern.Domain) || !slices.Equal(hostParts[1:], pattern.Domain) {
+	hostLen := len(hostParts)
+	patternLen := len(pattern.Domain)
+
+	// host must have at least one more part than the pattern domain
+	if hostLen <= patternLen {
 		return "", false
 	}
-	return hostParts[0], true
+
+	// break the host parts into <subdomain parts> and <domain parts>
+	mid := hostLen - patternLen
+	prefix := hostParts[:mid]
+	suffix := hostParts[mid:]
+
+	// check if the suffix matches the domain
+	if !slices.Equal(suffix, pattern.Domain) {
+		return "", false
+	}
+
+	// return all the subdomain parts
+	subdomain := strings.Join(prefix, ".")
+	return subdomain, true
 }
 
 func (pattern *WildcardPattern) IsFallbackFor(host string) bool {