From 82d64bff9692bc0ee13a43d1ff6253440fd5ac55 Mon Sep 17 00:00:00 2001
From: JoKneeMo <421625+JoKneeMo@users.noreply.github.com>
Date: Sun, 11 Dec 2022 22:57:06 -0500
Subject: [PATCH 1/3] Set content-type before sending image data for a valid
 response

---
 results/index.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/results/index.php b/results/index.php
index ad6beca..2505058 100755
--- a/results/index.php
+++ b/results/index.php
@@ -212,7 +212,6 @@ function drawImage($speedtest)
     imagefttext($im, $FONT_WATERMARK_SIZE, 0, $POSITION_X_WATERMARK, $POSITION_Y_WATERMARK, $TEXT_COLOR_WATERMARK, $FONT_WATERMARK, $WATERMARK_TEXT);
 
     // send the image to the browser
-    header('Content-Type: image/png');
     imagepng($im);
 }
 
@@ -221,4 +220,5 @@ if (!is_array($speedtest)) {
     exit(1);
 }
 
+header('Content-Type: image/png');
 drawImage($speedtest);

From 20f1f46d1fc5fd300ad86da2717929bfb7d8ae2f Mon Sep 17 00:00:00 2001
From: JoKneeMo <421625+JoKneeMo@users.noreply.github.com>
Date: Sun, 11 Dec 2022 23:08:46 -0500
Subject: [PATCH 2/3] Docker support for a server that behaves as a standalone
 frontend AND a backend for another server.

---
 doc_docker.md        | 7 +++++++
 docker/entrypoint.sh | 6 +++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/doc_docker.md b/doc_docker.md
index 753fe02..53eabb0 100755
--- a/doc_docker.md
+++ b/doc_docker.md
@@ -104,3 +104,10 @@ This command starts LibreSpeed in frontend mode, with a given `servers.json` fil
 ```
 docker run -e MODE=frontend -e TELEMETRY=true -e ENABLE_ID_OBFUSCATION=true -e PASSWORD="yourPasswordHere" -v $(pwd)/servers.json:/servers.json -p 80:80 -it adolfintel/speedtest
 ```
+
+### Dual mode
+In dual mode, LibreSpeed operates as a standalone server that can also connect to other test points.
+To do this:
+* Set the `MODE` environment variable to `dual`
+* Follow the `servers.json` instructions for the frontend mode
+* The first server entry should be the local server, using the server endpoint address that a client can access.
\ No newline at end of file
diff --git a/docker/entrypoint.sh b/docker/entrypoint.sh
index d08ff05..92ea473 100755
--- a/docker/entrypoint.sh
+++ b/docker/entrypoint.sh
@@ -13,7 +13,7 @@ cp /speedtest/*.js /var/www/html/
 cp /speedtest/favicon.ico /var/www/html/
 
 # Set up backend side for standlone modes
-if [ "$MODE" == "standalone" ]; then
+if [[ "$MODE" == "standalone" || "$MODE" == "dual" ]]; then
   cp -r /speedtest/backend/ /var/www/html/backend
   if [ ! -z "$IPINFO_APIKEY" ]; then
     sed -i s/\$IPINFO_APIKEY\ =\ \'\'/\$IPINFO_APIKEY\ =\ \'$IPINFO_APIKEY\'/g /var/www/html/backend/getIP_ipInfo_apikey.php
@@ -28,14 +28,14 @@ if [ "$MODE" == "backend" ]; then
 fi
 
 # Set up index.php for frontend-only or standalone modes
-if [ "$MODE" == "frontend" ]; then
+if [[ "$MODE" == "frontend" || "$MODE" == "dual" ]]; then
   cp /speedtest/frontend.php /var/www/html/index.php
 elif [ "$MODE" == "standalone" ]; then
   cp /speedtest/standalone.php /var/www/html/index.php
 fi
 
 # Apply Telemetry settings when running in standalone or frontend mode and telemetry is enabled
-if [[ "$TELEMETRY" == "true" && ( "$MODE" == "frontend" || "$MODE" == "standalone" ) ]]; then
+if [[ "$TELEMETRY" == "true" && ( "$MODE" == "frontend" || "$MODE" == "standalone" || "$MODE" == "dual" ) ]]; then
   cp -r /speedtest/results /var/www/html/results
   
   if [ "$MODE" == "frontend" ]; then

From 11f698b376969c59d9d1e7f29eb86f1d1759ee29 Mon Sep 17 00:00:00 2001
From: JoKneeMo <421625+JoKneeMo@users.noreply.github.com>
Date: Wed, 8 Nov 2023 11:05:47 -0500
Subject: [PATCH 3/3] Revert "Set content-type before sending image data for a
 valid response"

This reverts commit 82d64bff9692bc0ee13a43d1ff6253440fd5ac55.
---
 results/index.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/results/index.php b/results/index.php
index 2505058..ad6beca 100755
--- a/results/index.php
+++ b/results/index.php
@@ -212,6 +212,7 @@ function drawImage($speedtest)
     imagefttext($im, $FONT_WATERMARK_SIZE, 0, $POSITION_X_WATERMARK, $POSITION_Y_WATERMARK, $TEXT_COLOR_WATERMARK, $FONT_WATERMARK, $WATERMARK_TEXT);
 
     // send the image to the browser
+    header('Content-Type: image/png');
     imagepng($im);
 }
 
@@ -220,5 +221,4 @@ if (!is_array($speedtest)) {
     exit(1);
 }
 
-header('Content-Type: image/png');
 drawImage($speedtest);