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