seaweedfs/weed/s3api/s3api_objects_list_handlers.go
2018-07-24 01:38:08 -07:00

185 lines
4.9 KiB
Go

package s3api
import (
"context"
"fmt"
"net/http"
"net/url"
"path/filepath"
"strconv"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/s3"
"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
}
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
}