allow masquerading webfinger

docs/honk.8

@@ -171,6 +171,10 @@ To prepare a Twitter data archive, extract the twitter-longhash.zip file.
 After unzipping the data archive, navigate to the tweet_media directory
 and unzip any zip files contained within.
 .Dl ./honk import username twitter source-directory
+.Ss Advanced Options
+To support separate mentions without a subdomain,
+e.g. @user@example.com and https://honk.example.com/u/user,
+add a ('masqname', 'example.com') row the config table of the database.
 .Sh FILES
 .Nm
 files are split between the data directory and the view directory.

honk.go

@@ -208,6 +208,7 @@ const (
 )
 
 var serverName string
+var masqName string
 var dataDir = "."
 var viewDir = "."
 var iconName = "icon.png"
@@ -253,6 +254,10 @@ func main() {
 	getconfig("aboutmsg", &aboutMsg)
 	getconfig("loginmsg", &loginMsg)
 	getconfig("servername", &serverName)
+	getconfig("masqname", &masqName)
+	if masqName == "" {
+		masqName = serverName
+	}
 	getconfig("usersep", &userSep)
 	getconfig("honksep", &honkSep)
 	prepareStatements(db)

web.go

@@ -1997,7 +1997,7 @@ func fingerlicker(w http.ResponseWriter, r *http.Request) {
 		idx = strings.IndexByte(name, '@')
 		if idx != -1 {
 			name = name[:idx]
-			if name+"@"+serverName != orig {
+			if !(name+"@"+serverName == orig || name+"@"+masqName == orig) {
 				log.Printf("foreign request rejected")
 				name = ""
 			}
@@ -2014,7 +2014,7 @@ func fingerlicker(w http.ResponseWriter, r *http.Request) {
 	}
 
 	j := junk.New()
-	j["subject"] = fmt.Sprintf("acct:%s@%s", user.Name, serverName)
+	j["subject"] = fmt.Sprintf("acct:%s@%s", user.Name, masqName)
 	j["aliases"] = []string{user.URL}
 	l := junk.New()
 	l["rel"] = "self"