Add proxy host into allow list (go-gitea#20798)

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/hostmatcher/hostmatcher.go

@@ -78,6 +78,11 @@ func (hl *HostMatchList) AppendBuiltin(builtin string) {
 	hl.builtins = append(hl.builtins, builtin)
 }
 
+// AppendPattern appends more pattern to match
+func (hl *HostMatchList) AppendPattern(pattern string) {
+	hl.patterns = append(hl.patterns, pattern)
+}
+
 // IsEmpty checks if the checklist is empty
 func (hl *HostMatchList) IsEmpty() bool {
 	return hl == nil || (len(hl.builtins) == 0 && len(hl.patterns) == 0 && len(hl.ipNets) == 0)

services/migrations/migrate.go

@@ -479,5 +479,10 @@ func Init() error {
 	}
 	// TODO: at the moment, if ALLOW_LOCALNETWORKS=false, ALLOWED_DOMAINS=domain.com, and domain.com has IP 127.0.0.1, then it's still allowed.
 	// if we want to block such case, the private&loopback should be added to the blockList when ALLOW_LOCALNETWORKS=false
+
+	if setting.Proxy.Enabled && setting.Proxy.ProxyURLFixed != nil {
+		allowList.AppendPattern(setting.Proxy.ProxyURLFixed.Host)
+	}
+
 	return nil
 }