filer.backup: escape colon from path on windows

fix https://github.com/chrislusf/seaweedfs/issues/2084

weed/command/filer_sync.go

@@ -359,10 +359,10 @@ func genProcessFunction(sourcePath string, targetPath string, dataSink sink.Repl
 	return processEventFn
 }
 
-func buildKey(dataSink sink.ReplicationSink, message *filer_pb.EventNotification, targetPath string, sourceKey util.FullPath, sourcePath string) string {
+func buildKey(dataSink sink.ReplicationSink, message *filer_pb.EventNotification, targetPath string, sourceKey util.FullPath, sourcePath string) (key string) {
 	if !dataSink.IsIncremental() {
-		return util.Join(targetPath, string(sourceKey)[len(sourcePath):])
-	}
+		key = util.Join(targetPath, string(sourceKey)[len(sourcePath):])
+	} else {
 		var mTime int64
 		if message.NewEntry != nil {
 			mTime = message.NewEntry.Attributes.Mtime
@@ -370,5 +370,8 @@ func buildKey(dataSink sink.ReplicationSink, message *filer_pb.EventNotification
 			mTime = message.OldEntry.Attributes.Mtime
 		}
 		dateKey := time.Unix(mTime, 0).Format("2006-01-02")
-	return util.Join(targetPath, dateKey, string(sourceKey)[len(sourcePath):])
+		key = util.Join(targetPath, dateKey, string(sourceKey)[len(sourcePath):])
+	}
+
+	return escapeKey(key)
 }

weed/command/filer_sync_std.go

@@ -0,0 +1,7 @@
+// +build !windows
+
+package command
+
+func escapeKey(key string) string {
+	return key
+}

weed/command/filer_sync_windows.go

@@ -0,0 +1,12 @@
+package command
+
+import (
+	"strings"
+)
+
+func escapeKey(key string) string {
+	if strings.Contains(key, ":") {
+		return strings.ReplaceAll(key, ":", "")
+	}
+	return key
+}