Merge v1.2.1-master

Signed-off-by: Emile Vauge <emile@vauge.com>

vendor/github.com/codegangsta/negroni/logger.go

@@ -1,29 +1,80 @@
 package negroni
 
 import (
+	"bytes"
+
 	"log"
 	"net/http"
 	"os"
+	"text/template"
 	"time"
 )
 
+// LoggerEntry is the structure
+// passed to the template.
+type LoggerEntry struct {
+	StartTime string
+	Status    int
+	Duration  time.Duration
+	Hostname  string
+	Method    string
+	Path      string
+}
+
+// LoggerDefaultFormat is the format
+// logged used by the default Logger instance.
+var LoggerDefaultFormat = "{{.StartTime}} | {{.Status}} | \t {{.Duration}} | {{.Hostname}} | {{.Method}} {{.Path}} \n"
+
+// LoggerDefaultDateFormat is the
+// format used for date by the
+// default Logger instance.
+var LoggerDefaultDateFormat = time.RFC3339
+
+// ALogger interface
+type ALogger interface {
+	Println(v ...interface{})
+	Printf(format string, v ...interface{})
+}
+
 // Logger is a middleware handler that logs the request as it goes in and the response as it goes out.
 type Logger struct {
-	// Logger inherits from log.Logger used to log messages with the Logger middleware
-	*log.Logger
+	// ALogger implements just enough log.Logger interface to be compatible with other implementations
+	ALogger
+	dateFormat string
+	template   *template.Template
 }
 
 // NewLogger returns a new Logger instance
 func NewLogger() *Logger {
-	return &Logger{log.New(os.Stdout, "[negroni] ", 0)}
+	logger := &Logger{ALogger: log.New(os.Stdout, "[negroni] ", 0), dateFormat: LoggerDefaultDateFormat}
+	logger.SetFormat(LoggerDefaultFormat)
+	return logger
+}
+
+func (l *Logger) SetFormat(format string) {
+	l.template = template.Must(template.New("negroni_parser").Parse(format))
+}
+
+func (l *Logger) SetDateFormat(format string) {
+	l.dateFormat = format
 }
 
 func (l *Logger) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
 	start := time.Now()
-	l.Printf("Started %s %s", r.Method, r.URL.Path)
 
 	next(rw, r)
 
 	res := rw.(ResponseWriter)
-	l.Printf("Completed %v %s in %v", res.Status(), http.StatusText(res.Status()), time.Since(start))
+	log := LoggerEntry{
+		StartTime: start.Format(l.dateFormat),
+		Status:    res.Status(),
+		Duration:  time.Since(start),
+		Hostname:  r.Host,
+		Method:    r.Method,
+		Path:      r.URL.Path,
+	}
+
+	buff := &bytes.Buffer{}
+	l.template.Execute(buff, log)
+	l.Printf(buff.String())
 }