From b82ae5c042d47d0e1cb9c69338d13bb681ddf38d Mon Sep 17 00:00:00 2001
From: Bart <mormegil6@gmail.com>
Date: Fri, 24 Jul 2026 14:53:23 +0200
Subject: [PATCH] Emit relative redirects (absolute_redirect off) so mapped
 ports survive

nginx builds directory redirects (for example /webtools to /webtools/) as
absolute URLs from its internal listen port. When the transcoder container is
published on a different host port (docker -p 8081:80, or behind a reverse
proxy / VPN bind), that port is dropped: GET http://host:8081/webtools 301s to
http://host/webtools/ on port 80, landing on the wrong service.

absolute_redirect off makes nginx emit a relative Location (/webtools/), which
the browser resolves against the request URL, keeping the port. Set at the HTTP
server level so it also covers /dash and any other directory. Applied to both
nginx.conf and nginx-no-ssl.conf; no change for same-port (80/443) deployments.
---
 nginx-transcoder/nginx-no-ssl.conf | 7 +++++++
 nginx-transcoder/nginx.conf        | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/nginx-transcoder/nginx-no-ssl.conf b/nginx-transcoder/nginx-no-ssl.conf
index 4941ca0..04cf802 100644
--- a/nginx-transcoder/nginx-no-ssl.conf
+++ b/nginx-transcoder/nginx-no-ssl.conf
@@ -39,6 +39,13 @@ http {
     limit_req_status 401;
 
     server {
+        # Emit RELATIVE redirects. Otherwise nginx rebuilds a directory redirect
+        # (e.g. /webtools -> /webtools/) from its internal listen port, dropping
+        # any external mapped port when the container is published on a different
+        # port (docker -p 8081:80, or behind a reverse proxy / VPN bind) and
+        # sending the browser to the wrong URL.
+        absolute_redirect off;
+
         listen ${HTTP_PORT};
 
         location / {
diff --git a/nginx-transcoder/nginx.conf b/nginx-transcoder/nginx.conf
index be7d508..95116a4 100644
--- a/nginx-transcoder/nginx.conf
+++ b/nginx-transcoder/nginx.conf
@@ -44,6 +44,13 @@ http {
     limit_req_status 401;
 
     server {
+        # Emit RELATIVE redirects. Otherwise nginx rebuilds a directory redirect
+        # (e.g. /webtools -> /webtools/) from its internal listen port, dropping
+        # any external mapped port when the container is published on a different
+        # port (docker -p 8081:80, or behind a reverse proxy / VPN bind) and
+        # sending the browser to the wrong URL.
+        absolute_redirect off;
+
         listen ${HTTP_PORT};
 
         listen 443 ssl;