frostfs-s3-gw/api/handler/get.go
Evgeniy Kulikov 2a93a216f8 Migrate to SDK 0.3.0 and fixes
- fix displaying list objects
- simplify `ListObjects`
- simplify `GetObjectHandler`
- simplify `HeadObjectHandler`
- add method for `GetBucketVersioningHandler`
- add method for `ListMultipartUploadsHandler`
- improvements for `HeadObjectHandler`, to display folders meta
- update dependencies
  - github.com/aws/aws-sdk-go v1.36.26
  - github.com/google/uuid v1.1.4
  - github.com/gorilla/mux v1.8.0
  - github.com/nspcc-dev/cdn-sdk v0.3.0
  - github.com/nspcc-dev/neofs-api-go v1.22.0
  - github.com/prometheus/client_golang v1.9.0
  - github.com/stretchr/testify v1.7.0
  - google.golang.org/grpc v1.35.0

Signed-off-by: Evgeniy Kulikov <kim@nspcc.ru>
2021-01-14 20:39:48 +03:00

115 lines
2.5 KiB
Go

package handler
import (
"context"
"io"
"net/http"
"strconv"
"sync"
"github.com/gorilla/mux"
"github.com/nspcc-dev/neofs-s3-gate/api"
"github.com/nspcc-dev/neofs-s3-gate/api/layer"
"go.uber.org/zap"
)
type (
detector struct {
io.Writer
sync.Once
contentType string
}
)
func newDetector(w io.Writer) *detector {
return &detector{Writer: w}
}
func (d *detector) Write(data []byte) (int, error) {
d.Once.Do(func() {
if rw, ok := d.Writer.(http.ResponseWriter); ok {
rw.WriteHeader(http.StatusOK)
}
d.contentType = http.DetectContentType(data)
})
return d.Writer.Write(data)
}
func (h *handler) contentTypeFetcher(ctx context.Context, w io.Writer, info *layer.ObjectInfo) (string, error) {
if info.IsDir() {
return info.ContentType, nil
}
writer := newDetector(w)
params := &layer.GetObjectParams{
Bucket: info.Bucket,
Object: info.Name,
Writer: writer,
}
// params.Length = inf.Size
if err := h.obj.GetObject(ctx, params); err != nil {
return "", err
}
return writer.contentType, nil
}
func writeHeaders(h http.Header, info *layer.ObjectInfo) {
h.Set("Content-Type", info.ContentType)
h.Set("Last-Modified", info.Created.Format(http.TimeFormat))
h.Set("Content-Length", strconv.FormatInt(info.Size, 10))
for key, val := range info.Headers {
h.Set("X-"+key, val)
}
}
func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
var (
err error
inf *layer.ObjectInfo
req = mux.Vars(r)
bkt = req["bucket"]
obj = req["object"]
rid = api.GetRequestID(r.Context())
)
if inf, err = h.obj.GetObjectInfo(r.Context(), bkt, obj); err != nil {
h.log.Error("could not find object",
zap.String("request_id", rid),
zap.String("bucket_name", bkt),
zap.String("object_name", obj),
zap.Error(err))
api.WriteErrorResponse(r.Context(), w, api.Error{
Code: api.GetAPIError(api.ErrInternalError).Code,
Description: err.Error(),
HTTPStatusCode: http.StatusInternalServerError,
}, r.URL)
return
} else if inf.ContentType, err = h.contentTypeFetcher(r.Context(), w, inf); err != nil {
h.log.Error("could not get object",
zap.String("request_id", rid),
zap.String("bucket_name", bkt),
zap.String("object_name", obj),
zap.Error(err))
api.WriteErrorResponse(r.Context(), w, api.Error{
Code: api.GetAPIError(api.ErrInternalError).Code,
Description: err.Error(),
HTTPStatusCode: http.StatusInternalServerError,
}, r.URL)
return
}
writeHeaders(w.Header(), inf)
}