add tool to see meta file generated by "fs.meta.save"

unmaintained/see_meta/see_meta.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"os"
+
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/proto"
+)
+
+var (
+	metaFile = flag.String("meta", "", "meta file generated via fs.meta.save")
+)
+
+func main() {
+	flag.Parse()
+
+	dst, err := os.OpenFile(*metaFile, os.O_RDONLY, 0644)
+	if err != nil {
+		log.Fatalf("failed to open %s: %v", *metaFile, err)
+	}
+	defer dst.Close()
+
+	err = walkMetaFile(dst)
+	if err != nil {
+		log.Fatalf("failed to open %s: %v", *metaFile, err)
+	}
+
+}
+
+func walkMetaFile(dst *os.File) error {
+
+	sizeBuf := make([]byte, 4)
+
+	for {
+		if n, err := dst.Read(sizeBuf); n != 4 {
+			if err == io.EOF {
+				return nil
+			}
+			return err
+		}
+
+		size := util.BytesToUint32(sizeBuf)
+
+		data := make([]byte, int(size))
+
+		if n, err := dst.Read(data); n != len(data) {
+			return err
+		}
+
+		fullEntry := &filer_pb.FullEntry{}
+		if err := proto.Unmarshal(data, fullEntry); err != nil {
+			return err
+		}
+
+		fmt.Fprintf(os.Stdout, "file %s %v\n", filer2.FullPath(fullEntry.Dir).Child(fullEntry.Entry.Name), fullEntry.Entry.Attributes.String())
+		for i, chunk := range fullEntry.Entry.Chunks {
+			fmt.Fprintf(os.Stdout, "  chunk %d %v\n", i+1, chunk.String())
+		}
+
+	}
+
+}