Merge pull request #1782 from JessonChan/some_wip

BeeLogger can be the writer of  http server's log 

app.go

@@ -16,6 +16,7 @@ package beego
 
 import (
 	"fmt"
+	"log"
 	"net"
 	"net/http"
 	"net/http/fcgi"
@@ -95,6 +96,7 @@ func (app *App) Run() {
 	app.Server.Handler = app.Handlers
 	app.Server.ReadTimeout = time.Duration(BConfig.Listen.ServerTimeOut) * time.Second
 	app.Server.WriteTimeout = time.Duration(BConfig.Listen.ServerTimeOut) * time.Second
+	app.Server.ErrorLog = log.New(BeeLogger, "", 0)
 
 	// run graceful mode
 	if BConfig.Listen.Graceful {

logs/log.go

@@ -196,6 +196,22 @@ func (bl *BeeLogger) writeToLoggers(when time.Time, msg string, level int) {
 	}
 }
 
+func (bl *BeeLogger) Write(p []byte) (n int, err error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
+	// writeMsg will always add a '\n' character
+	if p[len(p)-1] == '\n' {
+		p = p[0 : len(p)-1]
+	}
+	// set LevelCritical to ensure all log message will be write out
+	err = bl.writeMsg(LevelCritical, string(p))
+	if err == nil {
+		return len(p), err
+	}
+	return 0, err
+}
+
 func (bl *BeeLogger) writeMsg(logLevel int, msg string) error {
 	when := time.Now()
 	if bl.enableFuncCallDepth {
@@ -205,7 +221,7 @@ func (bl *BeeLogger) writeMsg(logLevel int, msg string) error {
 			line = 0
 		}
 		_, filename := path.Split(file)
-		msg = "[" + filename + ":" + strconv.FormatInt(int64(line), 10) + "]" + msg
+		msg = "[" + filename + ":" + strconv.FormatInt(int64(line), 10) + "] " + msg
 	}
 	if bl.asynchronous {
 		lm := logMsgPool.Get().(*logMsg)

router.go

@@ -802,9 +802,9 @@ func (p *ControllerRegister) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 	p.execFilter(context, FinishRouter, urlPath)
 
 Admin:
-	timeDur := time.Since(startTime)
 	//admin module record QPS
 	if BConfig.Listen.EnableAdmin {
+		timeDur := time.Since(startTime)
 		if FilterMonitorFunc(r.Method, r.URL.Path, timeDur) {
 			if runRouter != nil {
 				go toolbox.StatisticsMap.AddStatistics(r.Method, r.URL.Path, runRouter.Name(), timeDur)
@@ -815,6 +815,7 @@ Admin:
 	}
 
 	if BConfig.RunMode == DEV || BConfig.Log.AccessLogs {
+		timeDur := time.Since(startTime)
 		var devInfo string
 		if findRouter {
 			if routerInfo != nil {