From 879bdafb60c93638a64b69d5c24e95fc265ae9b8 Mon Sep 17 00:00:00 2001
From: Eduard Urbach <eduard@urbach.dev>
Date: Tue, 4 Mar 2025 12:16:16 +0100
Subject: [PATCH] Added canonical URLs

---
 main.go                        |  1 +
 server/middleware/Canonical.go | 12 ++++++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 server/middleware/Canonical.go

diff --git a/main.go b/main.go
index d7351cc..a4d2f30 100644
--- a/main.go
+++ b/main.go
@@ -19,6 +19,7 @@ func main() {
 	server.Use(middleware.Recover)
 	server.Use(middleware.RedirectTrailingSlashes)
 	server.Use(middleware.HSTS)
+	server.Use(middleware.Canonical)
 	server.Get("/", pages.Frontpage)
 	server.Get("/blog", pages.Blog)
 	server.Get("/:post", pages.Post)
diff --git a/server/middleware/Canonical.go b/server/middleware/Canonical.go
new file mode 100644
index 0000000..01e047c
--- /dev/null
+++ b/server/middleware/Canonical.go
@@ -0,0 +1,12 @@
+package middleware
+
+import (
+	"fmt"
+
+	"git.urbach.dev/go/web"
+)
+
+func Canonical(ctx web.Context) error {
+	ctx.Response().SetHeader("Link", fmt.Sprintf(`<https://urbach.dev%s>; rel="canonical"`, ctx.Request().Path()))
+	return ctx.Next()
+}