package s3api import ( "context" "fmt" "github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/gorilla/mux" "net/http" "net/url" "path/filepath" "strconv" "time" "github.com/aws/aws-sdk-go/service/s3" "github.com/aws/aws-sdk-go/aws" ) const ( maxObjectListSizeLimit = 1000 // Limit number of objects in a listObjectsResponse. ) func (s3a *S3ApiServer) ListObjectsV2Handler(w http.ResponseWriter, r *http.Request) { // https://docs.aws.amazon.com/AmazonS3/latest/API/v2-RESTBucketGET.html // collect parameters vars := mux.Vars(r) bucket := vars["bucket"] glog.V(4).Infof("read v2: %v", vars) originalPrefix, marker, startAfter, delimiter, _, maxKeys := getListObjectsV2Args(r.URL.Query()) if maxKeys < 0 { writeErrorResponse(w, ErrInvalidMaxKeys, r.URL) return } if delimiter != "" && delimiter != "/" { writeErrorResponse(w, ErrNotImplemented, r.URL) return } if marker == "" { marker = startAfter } response, err := s3a.listFilerEntries(bucket, originalPrefix, maxKeys, marker) if err != nil { writeErrorResponse(w, ErrInternalError, r.URL) return } writeSuccessResponseXML(w, encodeResponse(response)) } func (s3a *S3ApiServer) ListObjectsV1Handler(w http.ResponseWriter, r *http.Request) { // https://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketGET.html // collect parameters vars := mux.Vars(r) bucket := vars["bucket"] originalPrefix, marker, delimiter, maxKeys := getListObjectsV1Args(r.URL.Query()) if maxKeys < 0 { writeErrorResponse(w, ErrInvalidMaxKeys, r.URL) return } if delimiter != "" && delimiter != "/" { writeErrorResponse(w, ErrNotImplemented, r.URL) return } response, err := s3a.listFilerEntries(bucket, originalPrefix, maxKeys, marker) if err != nil { writeErrorResponse(w, ErrInternalError, r.URL) return } writeSuccessResponseXML(w, encodeResponse(response)) } func (s3a *S3ApiServer) listFilerEntries(bucket, originalPrefix string, maxKeys int, marker string) (response *s3.ListObjectsOutput, err error) { // convert full path prefix into directory name and prefix for entry name dir, prefix := filepath.Split(originalPrefix) // check filer err = s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error { request := &filer_pb.ListEntriesRequest{ Directory: fmt.Sprintf("%s/%s/%s", s3a.option.BucketsPath, bucket, dir), Prefix: prefix, Limit: uint32(maxKeys + 1), StartFromFileName: marker, InclusiveStartFrom: false, } resp, err := client.ListEntries(context.Background(), request) if err != nil { return fmt.Errorf("list buckets: %v", err) } var contents []*s3.Object var commonPrefixes []*s3.CommonPrefix var counter int var lastEntryName string var isTruncated bool for _, entry := range resp.Entries { counter++ if counter > maxKeys { isTruncated = true break } lastEntryName = entry.Name if entry.IsDirectory { commonPrefixes = append(commonPrefixes, &s3.CommonPrefix{ Prefix: aws.String(fmt.Sprintf("%s%s/", dir, entry.Name)), }) } else { contents = append(contents, &s3.Object{ Key: aws.String(fmt.Sprintf("%s%s", dir, entry.Name)), LastModified: aws.Time(time.Unix(entry.Attributes.Mtime, 0)), ETag: aws.String("\"2345sgfwetrewrt\""), // TODO add etag Size: aws.Int64(int64(filer2.TotalSize(entry.Chunks))), Owner: &s3.Owner{ ID: aws.String("bcaf161ca5fb16fd081034f"), DisplayName: aws.String("webfile"), }, StorageClass: aws.String("STANDARD"), }) } } response = &s3.ListObjectsOutput{ Name: aws.String(bucket), Prefix: aws.String(originalPrefix), Marker: aws.String(marker), NextMarker: aws.String(lastEntryName), MaxKeys: aws.Int64(int64(maxKeys)), Delimiter: aws.String("/"), IsTruncated: aws.Bool(isTruncated), Contents: contents, CommonPrefixes: commonPrefixes, } glog.V(4).Infof("read directory: %v, found: %v", request, counter) return nil }) return } func getListObjectsV2Args(values url.Values) (prefix, token, startAfter, delimiter string, fetchOwner bool, maxkeys int) { prefix = values.Get("prefix") token = values.Get("continuation-token") startAfter = values.Get("start-after") delimiter = values.Get("delimiter") if values.Get("max-keys") != "" { maxkeys, _ = strconv.Atoi(values.Get("max-keys")) } else { maxkeys = maxObjectListSizeLimit } fetchOwner = values.Get("fetch-owner") == "true" return } func getListObjectsV1Args(values url.Values) (prefix, marker, delimiter string, maxkeys int) { prefix = values.Get("prefix") marker = values.Get("marker") delimiter = values.Get("delimiter") if values.Get("max-keys") != "" { maxkeys, _ = strconv.Atoi(values.Get("max-keys")) } else { maxkeys = maxObjectListSizeLimit } return }