seaweedfs/weed/storage/needle/needle_read_test.go

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package needle
import (
"fmt"
"github.com/seaweedfs/seaweedfs/weed/storage/backend"
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"io"
"os"
"testing"
"github.com/seaweedfs/seaweedfs/weed/storage/types"
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)
func TestPageRead(t *testing.T) {
baseFileName := "43"
offset := int64(8)
size := types.Size(1153890) // actual file size 1153862
datFile, err := os.OpenFile(baseFileName+".dat", os.O_RDONLY, 0644)
if err != nil {
t.Fatalf("Open Volume Data File [ERROR]: %v", err)
}
datBackend := backend.NewDiskFile(datFile)
defer datBackend.Close()
{
n := new(Needle)
bytes, err := ReadNeedleBlob(datBackend, offset, size, Version3)
if err != nil {
t.Fatalf("readNeedleBlob: %v", err)
}
if err = n.ReadBytes(bytes, offset, size, Version3); err != nil {
t.Fatalf("readNeedleBlob: %v", err)
}
fmt.Printf("bytes len %d\n", len(bytes))
fmt.Printf("name %s size %d\n", n.Name, n.Size)
fmt.Printf("id %d\n", n.Id)
fmt.Printf("DataSize %d\n", n.DataSize)
fmt.Printf("Flags %v\n", n.Flags)
fmt.Printf("NameSize %d\n", n.NameSize)
fmt.Printf("MimeSize %d\n", n.MimeSize)
fmt.Printf("PairsSize %d\n", n.PairsSize)
fmt.Printf("LastModified %d\n", n.LastModified)
fmt.Printf("AppendAtNs %d\n", n.AppendAtNs)
fmt.Printf("Checksum %d\n", n.Checksum)
}
{
n, bytes, bodyLength, err := ReadNeedleHeader(datBackend, Version3, offset)
if err != nil {
t.Fatalf("ReadNeedleHeader: %v", err)
}
fmt.Printf("bytes len %d\n", len(bytes))
fmt.Printf("name %s size %d bodyLength:%d\n", n.Name, n.Size, bodyLength)
}
{
n := new(Needle)
err := n.ReadNeedleMeta(datBackend, offset, size, Version3)
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if err != nil {
t.Fatalf("ReadNeedleHeader: %v", err)
}
fmt.Printf("name %s size %d\n", n.Name, n.Size)
fmt.Printf("id %d\n", n.Id)
fmt.Printf("DataSize %d\n", n.DataSize)
fmt.Printf("Flags %v\n", n.Flags)
fmt.Printf("NameSize %d\n", n.NameSize)
fmt.Printf("MimeSize %d\n", n.MimeSize)
fmt.Printf("PairsSize %d\n", n.PairsSize)
fmt.Printf("LastModified %d\n", n.LastModified)
fmt.Printf("AppendAtNs %d\n", n.AppendAtNs)
fmt.Printf("Checksum %d\n", n.Checksum)
buf := make([]byte, 1024)
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if err = n.ReadNeedleDataInto(datBackend, offset, buf, io.Discard, 0, int64(n.DataSize)); err != nil {
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t.Fatalf("ReadNeedleDataInto: %v", err)
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}
}
}