From 15c2dcc46fcfd289a3309f6f86c1a31a2af0da8f Mon Sep 17 00:00:00 2001
From: Haelnorr <lockedonohoe@gmail.com>
Date: Thu, 13 Feb 2025 22:23:35 +1100
Subject: [PATCH] Added gzip middleware

---
 middleware/gzip.go | 31 +++++++++++++++++++++++++++++++
 server/server.go   |  3 +++
 2 files changed, 34 insertions(+)
 create mode 100644 middleware/gzip.go

diff --git a/middleware/gzip.go b/middleware/gzip.go
new file mode 100644
index 0000000..cc9ae92
--- /dev/null
+++ b/middleware/gzip.go
@@ -0,0 +1,31 @@
+package middleware
+
+import (
+	"compress/gzip"
+	"io"
+	"net/http"
+	"strings"
+)
+
+func Gzip(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+			next.ServeHTTP(w, r)
+			return
+		}
+		w.Header().Set("Content-Encoding", "gzip")
+		gz := gzip.NewWriter(w)
+		defer gz.Close()
+		gzw := gzipResponseWriter{Writer: gz, ResponseWriter: w}
+		next.ServeHTTP(gzw, r)
+	})
+}
+
+type gzipResponseWriter struct {
+	io.Writer
+	http.ResponseWriter
+}
+
+func (w gzipResponseWriter) Write(b []byte) (int, error) {
+	return w.Writer.Write(b)
+}
diff --git a/server/server.go b/server/server.go
index c43b225..c86490b 100644
--- a/server/server.go
+++ b/server/server.go
@@ -33,6 +33,9 @@ func NewServer(
 	handler = middleware.ExcludedFiles(handler)
 	handler = middleware.Favicon(handler)
 
+	// Gzip
+	handler = middleware.Gzip(handler)
+
 	// Start the timer for the request chain so logger can have accurate info
 	handler = middleware.StartTimer(handler)
 	return handler