generate missing object delete bucket notifications (#10449)

fixes #10381

cmd/object-handlers.go

@@ -2739,22 +2739,35 @@ func (api objectAPIHandlers) DeleteObjectHandler(w http.ResponseWriter, r *http.
 		}
 	}
 
-	if apiErr == ErrNone {
-		// http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectDELETE.html
-		objInfo, err := deleteObject(ctx, objectAPI, api.CacheAPI(), bucket, object, r, opts)
-		if err != nil {
-			switch err.(type) {
-			case BucketNotFound:
-				// When bucket doesn't exist specially handle it.
-				writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
-				return
-			}
-			// Ignore delete object errors while replying to client, since we are suppposed to reply only 204.
+	if apiErr == ErrNoSuchKey {
+		writeSuccessNoContent(w)
+		return
+	}
+
+	// http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectDELETE.html
+	objInfo, err := deleteObject(ctx, objectAPI, api.CacheAPI(), bucket, object, r, opts)
+	if err != nil {
+		switch err.(type) {
+		case BucketNotFound:
+			// When bucket doesn't exist specially handle it.
+			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
+			return
 		}
-		setPutObjHeaders(w, objInfo, true)
+		// Ignore delete object errors while replying to client, since we are suppposed to reply only 204.
 	}
+	setPutObjHeaders(w, objInfo, true)
 
 	writeSuccessNoContent(w)
+
+	sendEvent(eventArgs{
+		EventName:    event.ObjectRemovedDelete,
+		BucketName:   bucket,
+		Object:       objInfo,
+		ReqParams:    extractReqParams(r),
+		RespElements: extractRespElements(w),
+		UserAgent:    r.UserAgent(),
+		Host:         handlers.GetSourceIP(r),
+	})
 }
 
 // PutObjectLegalHoldHandler - set legal hold configuration to object,