From b0480356de57b5f696acf6a627b2b23842ba4d76 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ferdinand=20M=C3=BCtsch?= <ferdinand@muetsch.io>
Date: Sun, 7 Feb 2021 12:50:02 +0100
Subject: [PATCH] chore: exclude static assets from request logging

---
 main.go                |  5 ++++-
 middlewares/logging.go | 20 +++++++++++++++-----
 version.txt            |  2 +-
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/main.go b/main.go
index 7bd017d..5e2fc08 100644
--- a/main.go
+++ b/main.go
@@ -170,7 +170,10 @@ func main() {
 
 	// Globally used middlewares
 	recoveryMiddleware := handlers.RecoveryHandler()
-	loggingMiddleware := middlewares.NewLoggingMiddleware(log.New(os.Stdout, "", log.LstdFlags))
+	loggingMiddleware := middlewares.NewLoggingMiddleware(
+		log.New(os.Stdout, "", log.LstdFlags),
+		[]string{"/assets"},
+	)
 
 	// Router configs
 	router.Use(loggingMiddleware, recoveryMiddleware)
diff --git a/middlewares/logging.go b/middlewares/logging.go
index 2237067..08440c2 100644
--- a/middlewares/logging.go
+++ b/middlewares/logging.go
@@ -6,19 +6,22 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"strings"
 	"time"
 )
 
 type LoggingMiddleware struct {
-	handler http.Handler
-	output  *log.Logger
+	handler         http.Handler
+	output          *log.Logger
+	excludePrefixes []string
 }
 
-func NewLoggingMiddleware(output *log.Logger) func(http.Handler) http.Handler {
+func NewLoggingMiddleware(output *log.Logger, excludePrefixes []string) func(http.Handler) http.Handler {
 	return func(h http.Handler) http.Handler {
 		return &LoggingMiddleware{
-			handler: h,
-			output:  output,
+			handler:         h,
+			output:          output,
+			excludePrefixes: excludePrefixes,
 		}
 	}
 }
@@ -31,6 +34,13 @@ func (lg *LoggingMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	end := time.Now()
 	duration := end.Sub(start)
 
+	path := strings.ToLower(r.URL.Path)
+	for _, prefix := range lg.excludePrefixes {
+		if strings.HasPrefix(path, prefix) {
+			return
+		}
+	}
+
 	lg.output.Printf(
 		"%v status=%d, method=%s, uri=%s, duration=%v, bytes=%d, addr=%s\n",
 		time.Now().Format(time.RFC3339Nano),
diff --git a/version.txt b/version.txt
index 1b50fc3..db8b4ac 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.23.1
\ No newline at end of file
+1.23.2
\ No newline at end of file