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121 lines
3.3 KiB
121 lines
3.3 KiB
package operation
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import (
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"context"
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"errors"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/pb"
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"google.golang.org/grpc"
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"math/rand"
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"strings"
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"time"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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)
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type Location struct {
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Url string `json:"url,omitempty"`
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PublicUrl string `json:"publicUrl,omitempty"`
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GrpcPort int `json:"grpcPort,omitempty"`
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}
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func (l *Location) ServerAddress() pb.ServerAddress {
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return pb.NewServerAddressWithGrpcPort(l.Url, l.GrpcPort)
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}
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type LookupResult struct {
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VolumeOrFileId string `json:"volumeOrFileId,omitempty"`
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Locations []Location `json:"locations,omitempty"`
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Jwt string `json:"jwt,omitempty"`
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Error string `json:"error,omitempty"`
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}
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func (lr *LookupResult) String() string {
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return fmt.Sprintf("VolumeOrFileId:%s, Locations:%v, Error:%s", lr.VolumeOrFileId, lr.Locations, lr.Error)
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}
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var (
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vc VidCache // caching of volume locations, re-check if after 10 minutes
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)
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func LookupFileId(masterFn GetMasterFn, grpcDialOption grpc.DialOption, fileId string) (fullUrl string, jwt string, err error) {
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parts := strings.Split(fileId, ",")
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if len(parts) != 2 {
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return "", jwt, errors.New("Invalid fileId " + fileId)
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}
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lookup, lookupError := LookupVolumeId(masterFn, grpcDialOption, parts[0])
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if lookupError != nil {
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return "", jwt, lookupError
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}
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if len(lookup.Locations) == 0 {
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return "", jwt, errors.New("File Not Found")
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}
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return "http://" + lookup.Locations[rand.Intn(len(lookup.Locations))].Url + "/" + fileId, lookup.Jwt, nil
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}
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func LookupVolumeId(masterFn GetMasterFn, grpcDialOption grpc.DialOption, vid string) (*LookupResult, error) {
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results, err := LookupVolumeIds(masterFn, grpcDialOption, []string{vid})
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return results[vid], err
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}
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// LookupVolumeIds find volume locations by cache and actual lookup
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func LookupVolumeIds(masterFn GetMasterFn, grpcDialOption grpc.DialOption, vids []string) (map[string]*LookupResult, error) {
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ret := make(map[string]*LookupResult)
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var unknown_vids []string
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//check vid cache first
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for _, vid := range vids {
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locations, cacheErr := vc.Get(vid)
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if cacheErr == nil {
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ret[vid] = &LookupResult{VolumeOrFileId: vid, Locations: locations}
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} else {
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unknown_vids = append(unknown_vids, vid)
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}
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}
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//return success if all volume ids are known
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if len(unknown_vids) == 0 {
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return ret, nil
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}
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//only query unknown_vids
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err := WithMasterServerClient(false, masterFn(), grpcDialOption, func(masterClient master_pb.SeaweedClient) error {
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req := &master_pb.LookupVolumeRequest{
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VolumeOrFileIds: unknown_vids,
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}
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resp, grpcErr := masterClient.LookupVolume(context.Background(), req)
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if grpcErr != nil {
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return grpcErr
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}
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//set newly checked vids to cache
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for _, vidLocations := range resp.VolumeIdLocations {
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var locations []Location
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for _, loc := range vidLocations.Locations {
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locations = append(locations, Location{
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Url: loc.Url,
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PublicUrl: loc.PublicUrl,
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GrpcPort: int(loc.GrpcPort),
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})
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}
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if vidLocations.Error != "" {
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vc.Set(vidLocations.VolumeOrFileId, locations, 10*time.Minute)
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}
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ret[vidLocations.VolumeOrFileId] = &LookupResult{
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VolumeOrFileId: vidLocations.VolumeOrFileId,
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Locations: locations,
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Jwt: vidLocations.Auth,
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Error: vidLocations.Error,
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}
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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return ret, nil
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}
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