implemented log rename after size exceeds configurable limit

go.mod

@@ -3,3 +3,5 @@ module github.com/shlldev/miniws
 go 1.24.5
 
 require github.com/akamensky/argparse v1.4.0
+
+require github.com/google/uuid v1.6.0 // indirect

go.sum

@@ -1,2 +1,4 @@
 github.com/akamensky/argparse v1.4.0 h1:YGzvsTqCvbEZhL8zZu2AiA5nq805NZh75JNj4ajn1xc=
 github.com/akamensky/argparse v1.4.0/go.mod h1:S5kwC7IuDcEr5VeXtGPRVZ5o/FdhcMlQz4IZQuw64xA=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=

main.go

@@ -13,6 +13,7 @@ const (
 	HELP_LOGFOLDER    string = "the logs folder"
 	HELP_CONFIGFOLDER string = "the configurations folder"
 	HELP_WWWFOLDER    string = "the www folder where miniws will look for files to serve"
+	HELP_MAXLOGBYTES  string = "the maximum bytes after which the log files get split"
 )
 
 func main() {
@@ -22,6 +23,7 @@ func main() {
 	logFolder := parser.String("l", "logs-folder", &argparse.Options{Default: "logs", Help: HELP_LOGFOLDER})
 	configFolder := parser.String("c", "config-folder", &argparse.Options{Default: "config", Help: HELP_CONFIGFOLDER})
 	wwwFolder := parser.String("w", "www-folder", &argparse.Options{Default: ".", Help: HELP_WWWFOLDER})
+	maxLogBytes := parser.Int("b", "max-log-bytes", &argparse.Options{Default: 1024, Help: HELP_WWWFOLDER})
 
 	err := parser.Parse(os.Args)
 	if err != nil {
@@ -31,6 +33,6 @@ func main() {
 		return
 	}
 
-	webserver := miniws.NewWebServer(*port, *logFolder, *configFolder, *wwwFolder)
+	webserver := miniws.NewWebServer(*port, *logFolder, *configFolder, *wwwFolder, int64(*maxLogBytes))
 	webserver.Run()
 }

miniws/logger.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"log"
 	"os"
+
+	"github.com/google/uuid"
 )
 
 const (
@@ -15,12 +17,14 @@ const (
 )
 
 type Logger struct {
-	logFolder string
+	logFolder   string
+	maxLogBytes int64
 }
 
-func NewLogger(logFolder_ string) *Logger {
+func NewLogger(logFolder_ string, maxLogBytes_ int64) *Logger {
 	return &Logger{
-		logFolder: logFolder_,
+		logFolder:   logFolder_,
+		maxLogBytes: maxLogBytes_,
 	}
 }
 
@@ -41,22 +45,34 @@ func (l *Logger) logAccess(
 		remoteAddr, identifier, authuser, timestamp, request, status, bytesSent, referer, user_agent,
 	)
 	os.Mkdir(l.logFolder, os.ModeDir|os.ModePerm)
-	file, err := os.OpenFile(ensureSlashSuffix(l.logFolder)+FILENAME_ACCESSLOG, FLAGS_LOG_OPEN, PERMS_LOG_OPEN)
+	l.writeToLogFileAndRenameIfBig(FILENAME_ACCESSLOG, out)
-
-	if err != nil {
-		log.Println("couldn't open log access file at", ensureSlashSuffix(l.logFolder)+FILENAME_ACCESSLOG)
-	}
-	defer file.Close()
-	file.WriteString(out)
 }
 
 func (l *Logger) logError(str string) {
 	os.Mkdir(l.logFolder, PERMS_MKDIR)
-	file, err := os.OpenFile(ensureSlashSuffix(l.logFolder)+FILENAME_ERRORLOG, FLAGS_LOG_OPEN, PERMS_LOG_OPEN)
+	l.writeToLogFileAndRenameIfBig(FILENAME_ERRORLOG, str+"\n")
+}
+
+func (l *Logger) writeToLogFileAndRenameIfBig(filename, content string) {
+	file, err := os.OpenFile(ensureSlashSuffix(l.logFolder)+filename, FLAGS_LOG_OPEN, PERMS_LOG_OPEN)
 
 	if err != nil {
-		log.Println("couldn't open log error file at", ensureSlashSuffix(l.logFolder)+FILENAME_ERRORLOG)
+		log.Println("couldn't open log access file at", ensureSlashSuffix(l.logFolder)+filename)
 	}
+
 	defer file.Close()
-	file.WriteString(str + "\n")
+	file.WriteString(content)
+
+	fileinfo, err := file.Stat()
+
+	if err != nil {
+		log.Println("Error reading access file at", ensureSlashSuffix(l.logFolder)+filename)
+	}
+
+	if fileinfo.Size() > l.maxLogBytes {
+		defer os.Rename(ensureSlashSuffix(
+			l.logFolder)+fileinfo.Name(),
+			ensureSlashSuffix(l.logFolder)+fileinfo.Name()+"."+uuid.NewString(),
+		)
+	}
 }

miniws/webserver.go

@@ -31,10 +31,10 @@ type WebServer struct {
 	userAgentFilterMode FilterMode
 }
 
-func NewWebServer(port_ int, logFolder_, configFolder_, wwwFolder_ string) *WebServer {
+func NewWebServer(port_ int, logFolder_, configFolder_, wwwFolder_ string, maxLogBytes_ int64) *WebServer {
 
 	return &WebServer{
-		logger:              NewLogger(logFolder_),
+		logger:              NewLogger(logFolder_, maxLogBytes_),
 		port:                port_,
 		configFolder:        configFolder_,
 		wwwFolder:           wwwFolder_,