fix .netrc authentication (#2700) (#2708)

* provide both possible authentication solutions

Signed-off-by: David Schneiderbauer <dschneiderbauer@gmail.com>

routers/repo/http.go

@@ -139,19 +139,28 @@ func HTTP(ctx *context.Context) {
 			}
 
 			if authUser == nil {
-				authUser, err = models.GetUserByName(authUsername)
+				isUsernameToken := len(authPasswd) == 0 || authPasswd == "x-oauth-basic"
 
-				if err != nil {
-					if models.IsErrUserNotExist(err) {
-						ctx.HandleText(http.StatusUnauthorized, "invalid credentials")
-					} else {
-						ctx.Handle(http.StatusInternalServerError, "GetUserByName", err)
+				// Assume username is token
+				authToken := authUsername
+
+				if !isUsernameToken {
+					// Assume password is token
+					authToken = authPasswd
+
+					authUser, err = models.GetUserByName(authUsername)
+					if err != nil {
+						if models.IsErrUserNotExist(err) {
+							ctx.HandleText(http.StatusUnauthorized, "invalid credentials")
+						} else {
+							ctx.Handle(http.StatusInternalServerError, "GetUserByName", err)
+						}
+						return
 					}
-					return
 				}
 
 				// Assume password is a token.
-				token, err := models.GetAccessTokenBySHA(authPasswd)
+				token, err := models.GetAccessTokenBySHA(authToken)
 				if err != nil {
 					if models.IsErrAccessTokenNotExist(err) || models.IsErrAccessTokenEmpty(err) {
 						ctx.HandleText(http.StatusUnauthorized, "invalid credentials")
@@ -161,7 +170,13 @@ func HTTP(ctx *context.Context) {
 					return
 				}
 
-				if authUser.ID != token.UID {
+				if isUsernameToken {
+					authUser, err = models.GetUserByID(token.UID)
+					if err != nil {
+						ctx.Handle(http.StatusInternalServerError, "GetUserByID", err)
+						return
+					}
+				} else if authUser.ID != token.UID {
 					ctx.HandleText(http.StatusUnauthorized, "invalid credentials")
 					return
 				}
@@ -170,7 +185,6 @@ func HTTP(ctx *context.Context) {
 				if err = models.UpdateAccessToken(token); err != nil {
 					ctx.Handle(http.StatusInternalServerError, "UpdateAccessToken", err)
 				}
-
 			} else {
 				_, err = models.GetTwoFactorByUID(authUser.ID)