Improved logger

middleware/IPToHost.go

@@ -23,7 +23,11 @@ func IPToHost() aero.Middleware {
 func GetHostsForIP(ip string) []string {
 	hosts, found := ipToHosts.Get(ip)
 
-	if !found || hosts == nil {
+	if !found {
+		hosts = findHostsForIP(ip)
+	}
+
+	if hosts == nil {
 		return nil
 	}
 
@@ -31,17 +35,19 @@ func GetHostsForIP(ip string) []string {
 }
 
 // Finds all host names for the given IP
-func findHostsForIP(ip string) {
+func findHostsForIP(ip string) []string {
 	hosts, err := net.LookupAddr(ip)
 
 	if err != nil {
-		return
+		return nil
 	}
 
 	if len(hosts) == 0 {
-		return
+		return nil
 	}
 
 	// Cache host names
 	ipToHosts.Set(ip, hosts, cache.DefaultExpiration)
+
+	return hosts
 }

middleware/Log.go

@@ -12,26 +12,37 @@ import (
 	"github.com/animenotifier/notify.moe/utils"
 )
 
-// Log middleware logs every request into logs/request.log and errors into logs/error.log.
+var request = log.New()
-func Log() aero.Middleware {
+var err = log.New()
-	request := log.New()
+
+// Initialize log files
+func init() {
 	request.AddOutput(log.File("logs/request.log"))
 
-	err := log.New()
 	err.AddOutput(log.File("logs/error.log"))
 	err.AddOutput(os.Stderr)
+}
 
+// Log middleware logs every request into logs/request.log and errors into logs/error.log.
+func Log() aero.Middleware {
 	return func(ctx *aero.Context, next func()) {
 		start := time.Now()
 		next()
 		responseTime := time.Since(start)
+
+		go logRequest(ctx, responseTime)
+	}
+}
+
+// Logs a single request
+func logRequest(ctx *aero.Context, responseTime time.Duration) {
 	responseTimeString := strconv.Itoa(int(responseTime.Nanoseconds()/1000000)) + " ms"
 	responseTimeString = strings.Repeat(" ", 8-len(responseTimeString)) + responseTimeString
 
 	user := utils.GetUser(ctx)
 	ip := ctx.RealIP()
 
-		hostName := ""
+	hostName := "<unknown host>"
 	hostNames := GetHostsForIP(ip)
 
 	if len(hostNames) != 0 {
@@ -59,5 +70,4 @@ func Log() aero.Middleware {
 	if responseTime >= 200*time.Millisecond && !strings.HasPrefix(ctx.URI(), "/auth/") {
 		err.Error("Long response time", ip, hostName, responseTimeString, ctx.StatusCode, ctx.URI())
 	}
-	}
 }