package s3api import ( "context" "fmt" "net/http" "net/url" "path/filepath" "strconv" "strings" "time" "github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/gorilla/mux" ) 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 } ctx := context.Background() response, err := s3a.listFilerEntries(ctx, 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"] ctx := context.Background() 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(ctx, bucket, originalPrefix, maxKeys, marker) if err != nil { writeErrorResponse(w, ErrInternalError, r.URL) return } writeSuccessResponseXML(w, encodeResponse(response)) } func (s3a *S3ApiServer) listFilerEntries(ctx context.Context, bucket, originalPrefix string, maxKeys int, marker string) (response ListBucketResult, err error) { // convert full path prefix into directory name and prefix for entry name dir, prefix := filepath.Split(originalPrefix) if strings.HasPrefix(dir, "/") { dir = dir[1:] } // check filer err = s3a.withFilerClient(ctx, 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(ctx, request) if err != nil { return fmt.Errorf("list buckets: %v", err) } var contents []ListEntry var commonPrefixes []PrefixEntry 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, PrefixEntry{ Prefix: fmt.Sprintf("%s%s/", dir, entry.Name), }) } else { contents = append(contents, ListEntry{ Key: fmt.Sprintf("%s%s", dir, entry.Name), LastModified: time.Unix(entry.Attributes.Mtime, 0), ETag: "\"" + filer2.ETag(entry.Chunks) + "\"", Size: int64(filer2.TotalSize(entry.Chunks)), Owner: CanonicalUser{ ID: fmt.Sprintf("%x", entry.Attributes.Uid), DisplayName: entry.Attributes.UserName, }, StorageClass: "STANDARD", }) } } response = ListBucketResult{ Name: bucket, Prefix: originalPrefix, Marker: marker, NextMarker: lastEntryName, MaxKeys: maxKeys, Delimiter: "/", IsTruncated: isTruncated, Contents: contents, CommonPrefixes: commonPrefixes, } glog.V(4).Infof("read directory: %v, found: %v, %+v", request, counter, response) 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 }