From 11beddcfb12be8edbe1d8b52ec7718fa25a7835c Mon Sep 17 00:00:00 2001
From: Solderpunk <solderpunk@sdf.org>
Date: Sat, 6 Jun 2020 13:36:10 +0200
Subject: [PATCH] Add rudimentary support for specifying redirects.

---
 config.go  |  2 ++
 handler.go | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/config.go b/config.go
index 7acd510..4735fc6 100644
--- a/config.go
+++ b/config.go
@@ -12,6 +12,7 @@ type Config struct {
 	DocBase            string
 	HomeDocBase        string
 	LogPath            string
+	Redirects          map[string]string
 	CGIPath            string
 	SCGIPaths          map[string]string
 }
@@ -28,6 +29,7 @@ func getConfig(filename string) (Config, error) {
 	config.DocBase = "/var/gemini/"
 	config.HomeDocBase = "users"
 	config.LogPath = "molly.log"
+	config.Redirects = make(map[string]string)
 	config.CGIPath = "^/var/gemini/cgi-bin/"
 	config.SCGIPaths = make(map[string]string)
 
diff --git a/handler.go b/handler.go
index edf3f86..0677a39 100644
--- a/handler.go
+++ b/handler.go
@@ -72,6 +72,16 @@ func handleGeminiRequest(conn net.Conn, config Config, logEntries chan LogEntry)
 		return
 	}
 
+	// Check for redirects
+	for src, dst := range config.Redirects {
+		if URL.Path == src {
+			URL.Path = dst
+			conn.Write([]byte("30 " + URL.String() + "\r\n"))
+			log.Status = 30
+			return
+		}
+	}
+
 	// Check whether this URL is mapped to an SCGI app
 	for scgi_url, scgi_socket := range config.SCGIPaths {
 	    matched, err := regexp.Match(scgi_url, []byte(URL.Path))