add an accesslog simple example

_examples/README.md

@@ -72,6 +72,7 @@
     * [Sitemap](routing/sitemap/main.go)
 * Logging
     * [Request Logger](logging/request-logger/main.go)
+        * [AccessLog: simple example](logging/request-logger/accesslog-simple/main.go)
         * [AccessLog: log request & response and more](logging/request-logger/accesslog)
         * [AccessLog: custom fields and template](logging/request-logger/accesslog-template/main.go)
         * [AccessLog: CSV Format](logging/request-logger/accesslog-csv/main.go)

_examples/logging/request-logger/accesslog-simple/main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"github.com/kataras/iris/v12"
+	"github.com/kataras/iris/v12/middleware/accesslog"
+)
+
+// Default line format:
+// Time|Latency|Code|Method|Path|IP|Path Params Query Fields|Bytes Received|Bytes Sent|Request|Response|
+//
+// Read the example and its comments carefully.
+func makeAccessLog() *accesslog.AccessLog {
+	// Initialize a new access log middleware.
+	ac := accesslog.File("./access.log")
+
+	// Defaults to true. Change to false for better performance.
+	ac.RequestBody = false
+	ac.ResponseBody = false
+	ac.BytesReceived = false
+	ac.BytesSent = false
+
+	// Defaults to false.
+	ac.Async = false
+
+	return ac
+}
+
+func main() {
+	ac := makeAccessLog()
+	defer ac.Close()
+
+	app := iris.New()
+	// Register the middleware (UseRouter to catch http errors too).
+	app.UseRouter(ac.Handler)
+
+	app.Get("/", indexHandler)
+
+	app.Listen(":8080")
+}
+
+func indexHandler(ctx iris.Context) {
+	ctx.WriteString("OK")
+}

_examples/logging/request-logger/accesslog-template/main.go

@@ -15,6 +15,7 @@ func main() {
 
 	app := iris.New()
 	ac := accesslog.File("./access.log").AddOutput(app.Logger().Printer)
+	defer ac.Close()
 
 	// 1. Register a field.
 	ac.AddFields(func(ctx iris.Context, fields *accesslog.Fields) {

_examples/logging/request-logger/accesslog/main.go

@@ -30,7 +30,6 @@ func makeAccessLog() *accesslog.AccessLog {
 	// Initialize a new access log middleware.
 	// Accepts an `io.Writer`.
 	ac := accesslog.New(w)
-	defer ac.Close()
 	// ac.TimeFormat = "2006-01-02 15:04:05" // default
 
 	// Example of adding more than one field to the logger.
@@ -94,11 +93,7 @@ func makeAccessLog() *accesslog.AccessLog {
 
 func main() {
 	ac := makeAccessLog()
-
 	defer ac.Close()
-	iris.RegisterOnInterrupt(func() {
-		ac.Close()
-	})
 
 	app := iris.New()
 	// Register the middleware (UseRouter to catch http errors too).