api: DeleteObject should always return 204. (#1645)

Fixes #1643

object-handlers.go

@@ -936,10 +936,9 @@ func (api objectAPIHandlers) DeleteObjectHandler(w http.ResponseWriter, r *http.
 			return
 		}
 	}
-	if err := api.ObjectAPI.DeleteObject(bucket, object); err != nil {
-		errorIf(err, "DeleteObject failed.", nil)
-		writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
-		return
-	}
+	/// http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectDELETE.html
+	/// Ignore delete object errors, since we are suppposed to reply
+	/// only 204.
+	api.ObjectAPI.DeleteObject(bucket, object)
 	writeSuccessNoContent(w)
 }

server_test.go

@@ -351,6 +351,7 @@ func (s *MyAPISuite) TestDeleteBucketNotEmpty(c *C) {
 	c.Assert(response.StatusCode, Equals, http.StatusConflict)
 }
 
+// Tests delete object responses and success.
 func (s *MyAPISuite) TestDeleteObject(c *C) {
 	request, err := s.newRequest("PUT", testAPIFSCacheServer.URL+"/deletebucketobject", 0, nil)
 	c.Assert(err, IsNil)
@@ -374,6 +375,14 @@ func (s *MyAPISuite) TestDeleteObject(c *C) {
 	response, err = client.Do(request)
 	c.Assert(err, IsNil)
 	c.Assert(response.StatusCode, Equals, http.StatusNoContent)
+
+	// Delete non existant object should return http.StatusNoContent.
+	request, err = s.newRequest("DELETE", testAPIFSCacheServer.URL+"/deletebucketobject/myobject1", 0, nil)
+	c.Assert(err, IsNil)
+	client = http.Client{}
+	response, err = client.Do(request)
+	c.Assert(err, IsNil)
+	c.Assert(response.StatusCode, Equals, http.StatusNoContent)
 }
 
 func (s *MyAPISuite) TestNonExistantBucket(c *C) {