From d410daca035d6a1675093a8ac57863f27d80dcc8 Mon Sep 17 00:00:00 2001
From: Kolsch Systems <git@kolsch.systems>
Date: Mon, 16 Aug 2021 13:09:35 -0700
Subject: [PATCH 1/3] Add 'webp' image format to list of cached files

---
 global/server/static-files.conf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/global/server/static-files.conf b/global/server/static-files.conf
index da52a95..7cc3f12 100644
--- a/global/server/static-files.conf
+++ b/global/server/static-files.conf
@@ -9,7 +9,7 @@ location ~* \.(?:rss|atom)$ {
 }
 
 # Caches images, icons, video, audio, HTC, etc.
-location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|mp4|ogg|ogv|webm|htc)$ {
+location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|mp4|ogg|ogv|webm|htc|webp)$ {
 	expires 1y;
 	access_log off;
 }

From 154784387abd7236d57ce6a39293a85d0d06fb12 Mon Sep 17 00:00:00 2001
From: Kolsch Systems <git@kolsch.systems>
Date: Mon, 16 Aug 2021 13:28:51 -0700
Subject: [PATCH 2/3] Check if web browser supports WebP images

---
 global/http.conf | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/global/http.conf b/global/http.conf
index faf1e6d..fc7d426 100644
--- a/global/http.conf
+++ b/global/http.conf
@@ -5,4 +5,10 @@ sendfile on;
 tcp_nopush on;
 
 # Don't wait to send data in keep-alive state.
-tcp_nodelay on;
\ No newline at end of file
+tcp_nodelay on;
+
+# Check if web browser supports WebP images
+map $http_accept $webp_suffix {
+  default "";
+  "~*webp" ".webp";
+}
\ No newline at end of file

From 8e62c19fcac0df364721ecbd1649dd485f96debe Mon Sep 17 00:00:00 2001
From: Kolsch Systems <git@kolsch.systems>
Date: Mon, 16 Aug 2021 14:13:37 -0700
Subject: [PATCH 3/3] Use the WebP version of converted PNG/JPEG images

---
 global/server/static-files.conf | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/global/server/static-files.conf b/global/server/static-files.conf
index 7cc3f12..e4aba67 100644
--- a/global/server/static-files.conf
+++ b/global/server/static-files.conf
@@ -8,6 +8,12 @@ location ~* \.(?:rss|atom)$ {
 	expires 1h;
 }
 
+# Use the WebP version of converted PNG/JPEG images
+location ~* ^.+\.(png|jpe?g)$ {
+	add_header Vary Accept;
+	try_files $uri$webp_suffix $uri =404;
+}
+
 # Caches images, icons, video, audio, HTC, etc.
 location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|mp4|ogg|ogv|webm|htc|webp)$ {
 	expires 1y;