From efc3fc0990782b27b6d569a6203456c40c84b1bb Mon Sep 17 00:00:00 2001
From: Sasha Koshka <sashakoshka@tebibyte.media>
Date: Tue, 10 Dec 2024 21:32:12 -0500
Subject: [PATCH] http: Add an HTTP redirect senteniel error

---
 http/handler.go |  6 ++++++
 http/http.go    | 13 +++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/http/handler.go b/http/handler.go
index 2256080..d5bb723 100644
--- a/http/handler.go
+++ b/http/handler.go
@@ -179,6 +179,12 @@ func (this *Handler) serveDocument (
 		this.serveError (
 			res, req,
 			httpError.Status, httpError.Message, false)
+		return
+	}
+	var httpRedirect Redirect
+	if errors.As(err, &httpRedirect) {
+		http.Redirect(res, req, httpRedirect.Location, httpRedirect.Status)
+		return
 	}
 	if err != nil {
 		this.serveError (
diff --git a/http/http.go b/http/http.go
index b3b7ab6..f3438f6 100644
--- a/http/http.go
+++ b/http/http.go
@@ -22,6 +22,19 @@ func (err Error) Error () string {
 	}
 }
 
+// Redirect, if returned from a template, will cause the server to redirect the
+// client to the given location.
+type Redirect struct {
+	Status int
+	Location string
+}
+
+func (err Redirect) Error () string {
+	return fmt.Sprintf (
+		"%d: %s: %s",
+		err.Status, http.StatusText(err.Status), err.Location)
+}
+
 // HTTPData represents information about an ongoing HTTP request that is made
 // available to templates as they are being executed.
 type HTTPData struct {