Implement PutObject handler

Signed-off-by: Evgeniy Kulikov <kim@nspcc.ru>

api/handler/put.go

@@ -0,0 +1,74 @@
+package handler
+
+import (
+	"net/http"
+
+	"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"
+)
+
+func (h *handler) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
+	var (
+		err error
+		req = mux.Vars(r)
+		bkt = req["bucket"]
+		obj = req["object"]
+		rid = api.GetRequestID(r.Context())
+	)
+
+	if _, err := h.obj.GetBucketInfo(r.Context(), bkt); err != nil {
+		h.log.Error("could not find bucket",
+			zap.String("request_id", rid),
+			zap.String("bucket_name", bkt),
+			zap.Error(err))
+
+		api.WriteErrorResponse(r.Context(), w, api.Error{
+			Code:           api.GetAPIError(api.ErrBadRequest).Code,
+			Description:    err.Error(),
+			HTTPStatusCode: http.StatusBadRequest,
+		}, r.URL)
+
+		return
+	} else if _, err = h.obj.GetObjectInfo(r.Context(), bkt, obj); err == nil {
+		h.log.Error("object exists",
+			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.ErrMethodNotAllowed).Code,
+			Description:    "Object: " + bkt + "#" + obj + " already exists",
+			HTTPStatusCode: http.StatusBadRequest,
+		}, r.URL)
+
+		return
+	}
+
+	params := &layer.PutObjectParams{
+		Bucket: bkt,
+		Object: obj,
+		Reader: r.Body,
+		Size:   r.ContentLength,
+	}
+
+	if _, err = h.obj.PutObject(r.Context(), params); err != nil {
+		h.log.Error("could not upload 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
+	}
+
+	api.WriteSuccessResponseHeadersOnly(w)
+}