Fix display of client username field

middlewares/accesslog/logger.go

@@ -180,7 +180,7 @@ func (l *LogHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request, next h
 
 	next.ServeHTTP(crw, reqWithDataTable)
 
-	core[ClientUsername] = usernameIfPresent(reqWithDataTable.URL)
+	core[ClientUsername] = formatUsernameForLog(core[ClientUsername])
 
 	logDataTable.DownstreamResponse = crw.Header()
 
@@ -231,14 +231,12 @@ func silentSplitHostPort(value string) (host string, port string) {
 	return host, port
 }
 
-func usernameIfPresent(theURL *url.URL) string {
-	username := "-"
-	if theURL.User != nil {
-		if name := theURL.User.Username(); name != "" {
-			username = name
-		}
+func formatUsernameForLog(usernameField interface{}) string {
+	username, ok := usernameField.(string)
+	if ok && len(username) != 0 {
+		return username
 	}
-	return username
+	return "-"
 }
 
 // Logging handler to log frontend name, backend name, and elapsed time

middlewares/accesslog/logger_test.go

@@ -619,7 +619,6 @@ func doLogging(t *testing.T, config *types.AccessLog) {
 		Method:     testMethod,
 		RemoteAddr: fmt.Sprintf("%s:%d", testHostname, testPort),
 		URL: &url.URL{
-			User: url.UserPassword(testUsername, ""),
 			Path: testPath,
 		},
 	}
@@ -639,4 +638,5 @@ func logWriterTestHandlerFunc(rw http.ResponseWriter, r *http.Request) {
 	logDataTable.Core[RetryAttempts] = testRetryAttempts
 	logDataTable.Core[StartUTC] = testStart.UTC()
 	logDataTable.Core[StartLocal] = testStart.Local()
+	logDataTable.Core[ClientUsername] = testUsername
 }

middlewares/accesslog/save_username.go

@@ -0,0 +1,60 @@
+package accesslog
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/urfave/negroni"
+)
+
+const (
+	clientUsernameKey key = "ClientUsername"
+)
+
+// SaveUsername sends the Username name to the access logger.
+type SaveUsername struct {
+	next http.Handler
+}
+
+// NewSaveUsername creates a SaveUsername handler.
+func NewSaveUsername(next http.Handler) http.Handler {
+	return &SaveUsername{next}
+}
+
+func (sf *SaveUsername) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	serveSaveUsername(r, func() {
+		sf.next.ServeHTTP(rw, r)
+	})
+}
+
+// SaveNegroniUsername adds the Username to the access logger data table.
+type SaveNegroniUsername struct {
+	next negroni.Handler
+}
+
+// NewSaveNegroniUsername creates a SaveNegroniUsername handler.
+func NewSaveNegroniUsername(next negroni.Handler) negroni.Handler {
+	return &SaveNegroniUsername{next}
+}
+
+func (sf *SaveNegroniUsername) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	serveSaveUsername(r, func() {
+		sf.next.ServeHTTP(rw, r, next)
+	})
+}
+
+func serveSaveUsername(r *http.Request, apply func()) {
+	table := GetLogDataTable(r)
+
+	username, ok := r.Context().Value(clientUsernameKey).(string)
+	if ok {
+		table.Core[ClientUsername] = username
+	}
+
+	apply()
+}
+
+// WithUserName adds a username to a requests' context
+func WithUserName(req *http.Request, username string) *http.Request {
+	return req.WithContext(context.WithValue(req.Context(), clientUsernameKey, username))
+}