1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
package source
import (
"context"
"fmt"
"io"
"net/http"
"strings"
"google.golang.org/grpc"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
)
type ReplicationSource interface {
ReadPart(part string) io.ReadCloser
}
type FilerSource struct {
grpcAddress string
grpcDialOption grpc.DialOption
Dir string
}
func (fs *FilerSource) Initialize(configuration util.Configuration, prefix string) error {
return fs.initialize(
configuration.GetString(prefix+"grpcAddress"),
configuration.GetString(prefix+"directory"),
)
}
func (fs *FilerSource) initialize(grpcAddress string, dir string) (err error) {
fs.grpcAddress = grpcAddress
fs.Dir = dir
fs.grpcDialOption = security.LoadClientTLS(util.GetViper(), "grpc.client")
return nil
}
func (fs *FilerSource) LookupFileId(ctx context.Context, part string) (fileUrl string, err error) {
vid2Locations := make(map[string]*filer_pb.Locations)
vid := volumeId(part)
err = fs.withFilerClient(ctx, fs.grpcDialOption, func(ctx context.Context, client filer_pb.SeaweedFilerClient) error {
glog.V(4).Infof("read lookup volume id locations: %v", vid)
resp, err := client.LookupVolume(ctx, &filer_pb.LookupVolumeRequest{
VolumeIds: []string{vid},
})
if err != nil {
return err
}
vid2Locations = resp.LocationsMap
return nil
})
if err != nil {
glog.V(1).Infof("LookupFileId volume id %s: %v", vid, err)
return "", fmt.Errorf("LookupFileId volume id %s: %v", vid, err)
}
locations := vid2Locations[vid]
if locations == nil || len(locations.Locations) == 0 {
glog.V(1).Infof("LookupFileId locate volume id %s: %v", vid, err)
return "", fmt.Errorf("LookupFileId locate volume id %s: %v", vid, err)
}
fileUrl = fmt.Sprintf("http://%s/%s", locations.Locations[0].Url, part)
return
}
func (fs *FilerSource) ReadPart(ctx context.Context, part string) (filename string, header http.Header, readCloser io.ReadCloser, err error) {
fileUrl, err := fs.LookupFileId(ctx, part)
if err != nil {
return "", nil, nil, err
}
filename, header, readCloser, err = util.DownloadFile(fileUrl)
return filename, header, readCloser, err
}
func (fs *FilerSource) withFilerClient(ctx context.Context, grpcDialOption grpc.DialOption, fn func(context.Context, filer_pb.SeaweedFilerClient) error) error {
return util.WithCachedGrpcClient(ctx, func(ctx2 context.Context, grpcConnection *grpc.ClientConn) error {
client := filer_pb.NewSeaweedFilerClient(grpcConnection)
return fn(ctx2, client)
}, fs.grpcAddress, fs.grpcDialOption)
}
func volumeId(fileId string) string {
lastCommaIndex := strings.LastIndex(fileId, ",")
if lastCommaIndex > 0 {
return fileId[:lastCommaIndex]
}
return fileId
}
|
