Refactored logging; Syslog support

log.go

@@ -0,0 +1,90 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"log/syslog"
+	"net/http"
+)
+
+const (
+	logRequestFmt        = "[%s] %s: %s"
+	logRequestSyslogFmt  = "REQUEST [%s] %s: %s"
+	logResponseFmt       = "[%s] |\033[7;%dm %d \033[0m| %s"
+	logResponseSyslogFmt = "RESPONSE [%s] | %d | %s"
+	logWarningFmt        = "\033[1;33m[WARNING]\033[0m %s"
+	logWarningSyslogFmt  = "WARNING %s"
+	logFatalSyslogFmt    = "FATAL %s"
+)
+
+func logRequest(reqID string, r *http.Request) {
+	path := r.URL.RequestURI()
+
+	log.Printf(logRequestFmt, reqID, r.Method, path)
+
+	if syslogWriter != nil {
+		syslogWriter.Notice(fmt.Sprintf(logRequestSyslogFmt, reqID, r.Method, path))
+	}
+}
+
+func logResponse(reqID string, status int, msg string) {
+	var color int
+
+	if status >= 500 {
+		color = 31
+	} else if status >= 400 {
+		color = 33
+	} else {
+		color = 32
+	}
+
+	log.Printf(logResponseFmt, reqID, color, status, msg)
+
+	if syslogWriter != nil {
+		msg := fmt.Sprintf(logResponseSyslogFmt, reqID, status, msg)
+
+		if status >= 500 {
+			if syslogLevel >= syslog.LOG_ERR {
+				syslogWriter.Err(msg)
+			}
+		} else if status >= 400 {
+			if syslogLevel >= syslog.LOG_WARNING {
+				syslogWriter.Warning(msg)
+			}
+		} else {
+			if syslogLevel >= syslog.LOG_NOTICE {
+				syslogWriter.Notice(msg)
+			}
+		}
+	}
+}
+
+func logNotice(f string, args ...interface{}) {
+	msg := fmt.Sprintf(f, args...)
+
+	log.Print(msg)
+
+	if syslogWriter != nil && syslogLevel >= syslog.LOG_NOTICE {
+		syslogWriter.Notice(msg)
+	}
+}
+
+func logWarning(f string, args ...interface{}) {
+	msg := fmt.Sprintf(f, args...)
+
+	log.Printf(logWarningFmt, msg)
+
+	if syslogWriter != nil && syslogLevel >= syslog.LOG_WARNING {
+		syslogWriter.Warning(fmt.Sprintf(logWarningSyslogFmt, msg))
+	}
+}
+
+func logFatal(f string, args ...interface{}) {
+	msg := fmt.Sprintf(f, args...)
+
+	if syslogWriter != nil {
+		syslogWriter.Crit(fmt.Sprintf(logFatalSyslogFmt, msg))
+	}
+
+	log.Fatal(msg)
+}