config: read tcpKeepAlive from file (#97)

app.go

@@ -128,7 +128,7 @@ func (app *App) Shutdown(ctx context.Context) error {
 	return app.srv.Shutdown(ctx)
 }
 
-// TCPKeepAlive sets tcp keep-alive when using app.ListenAndServe
+// TCPKeepAlive sets tcp keep-alive interval when using app.ListenAndServe
 func (app *App) TCPKeepAlive(d time.Duration) *App {
 	app.tcpKeepAlive = d
 	return app

config.go

@@ -18,7 +18,8 @@ type AppConfig struct {
 		ReadHeaderTimeout string            `yaml:"readHeaderTimeout" json:"readHeaderTimeout"`
 		WriteTimeout      string            `yaml:"writeTimeout" json:"writeTimeout"`
 		IdleTimeout       string            `yaml:"idleTimeout" json:"idleTimeout"`
-		ReusePort         bool              `yaml:"reusePort" json:"reusePort"`
+		ReusePort         *bool             `yaml:"reusePort" json:"reusePort"`
+		TCPKeepAlive      string            `yaml:"tcpKeepAlive" json:"tcpKeepAlive"`
 		GracefulShutdown  *GracefulShutdown `yaml:"gracefulShutdown" json:"gracefulShutdown"`
 		TLS               *TLS              `yaml:"tls" json:"tls"`
 		HTTPSRedirect     *HTTPSRedirect    `yaml:"httpsRedirect" json:"httpsRedirect"`
@@ -86,9 +87,10 @@ func (app *App) Config(config AppConfig) *App {
 		parseDuration(server.ReadHeaderTimeout, &app.srv.ReadHeaderTimeout)
 		parseDuration(server.WriteTimeout, &app.srv.WriteTimeout)
 		parseDuration(server.IdleTimeout, &app.srv.IdleTimeout)
+		parseDuration(server.TCPKeepAlive, &app.tcpKeepAlive)
 
-		if server.ReusePort {
-			app.ReusePort(true)
+		if server.ReusePort != nil {
+			app.reusePort = *server.ReusePort
 		}
 
 		if t := server.TLS; t != nil {

config_test.go

@@ -35,6 +35,7 @@ func TestConfig(t *testing.T) {
 			assert.Equal(t, app.srv.ReadHeaderTimeout, 5*time.Second)
 			assert.Equal(t, app.srv.WriteTimeout, 6*time.Second)
 			assert.Equal(t, app.srv.IdleTimeout, 30*time.Second)
+			assert.Equal(t, app.tcpKeepAlive, time.Minute)
 			assert.True(t, app.reusePort)
 			assert.Len(t, app.srv.TLSConfig.Certificates, 1)
 

testdata/config1.yaml

@@ -23,6 +23,7 @@ server:
   writeTimeout: 6s
   idleTimeout: 30s
   reusePort: true
+  tcpKeepAlive: 1m
   gracefulShutdown:
     timeout: 1m
     wait: 5s