Code cleanup - simplify server side code. (#3870)

Fix all the issues reported by `gosimple` tool.

cmd/admin-handlers_test.go

@@ -1184,7 +1184,7 @@ func TestSetConfigHandler(t *testing.T) {
 		t.Fatalf("Failed to decode set config result json %v", err)
 	}
 
-	if result.Status != true {
+	if !result.Status {
 		t.Error("Expected set-config to succeed, but failed")
 	}
 }

cmd/bucket-handlers.go

@@ -86,10 +86,7 @@ func isBucketActionAllowed(action, bucket, prefix string) bool {
 	resource := bucketARNPrefix + path.Join(bucket, prefix)
 	var conditionKeyMap map[string]set.StringSet
 	// Validate action, resource and conditions with current policy statements.
-	if !bucketPolicyEvalStatements(action, resource, conditionKeyMap, policy.Statements) {
-		return false
-	}
-	return true
+	return bucketPolicyEvalStatements(action, resource, conditionKeyMap, policy.Statements)
 }
 
 // GetBucketLocationHandler - GET Bucket location.

cmd/bucket-notification-handlers.go

@@ -209,10 +209,7 @@ func writeNotification(w http.ResponseWriter, notification map[string][]Notifica
 	_, err = w.Write(append(notificationBytes, crlf...))
 	// Make sure we have flushed, this would set Transfer-Encoding: chunked.
 	w.(http.Flusher).Flush()
-	if err != nil {
-		return err
-	}
-	return nil
+	return err
 }
 
 // CRLF character used for chunked transfer in accordance with HTTP standards.

cmd/format-config-v1_test.go

@@ -213,9 +213,7 @@ func genFormatXLInvalidDisksOrder() []*formatConfigV1 {
 	}
 	// Re order jbod for failure case.
 	var jbod1 = make([]string, 8)
-	for i, j := range jbod {
-		jbod1[i] = j
-	}
+	copy(jbod1, jbod)
 	jbod1[1], jbod1[2] = jbod[2], jbod[1]
 	formatConfigs[2].XL.JBOD = jbod1
 	return formatConfigs
@@ -576,9 +574,7 @@ func TestSavedUUIDOrder(t *testing.T) {
 	}
 	// Re order jbod for failure case.
 	var jbod1 = make([]string, 8)
-	for i, j := range jbod {
-		jbod1[i] = j
-	}
+	copy(jbod1, jbod)
 	jbod1[1], jbod1[2] = jbod[2], jbod[1]
 	formatConfigs[2].XL.JBOD = jbod1
 	uuidTestCases[1].shouldPass = false

cmd/fs-v1-metadata.go

@@ -238,12 +238,9 @@ func saveFormatFS(formatPath string, fsFormat *formatConfigV1) error {
 	}
 	defer lk.Close()
 
-	if _, err = lk.Write(metadataBytes); err != nil {
-		return err
-	}
-
+	_, err = lk.Write(metadataBytes)
 	// Success.
-	return nil
+	return err
 }
 
 // Return if the part info in uploadedParts and completeParts are same.

cmd/fs-v1.go

@@ -67,12 +67,7 @@ func initMetaVolumeFS(fsPath, fsUUID string) error {
 	}
 
 	metaMultipartPath := pathJoin(fsPath, minioMetaMultipartBucket)
-	if err := mkdirAll(metaMultipartPath, 0777); err != nil {
-		return err
-	}
-
-	// Return success here.
-	return nil
+	return mkdirAll(metaMultipartPath, 0777)
 
 }
 

cmd/notifiers.go

@@ -98,10 +98,7 @@ func isWebhookQueue(sqsArn arnSQS) bool {
 		return false
 	}
 	rNotify := serverConfig.Notify.GetWebhookByID(sqsArn.AccountID)
-	if !rNotify.Enable {
-		return false
-	}
-	return true
+	return rNotify.Enable
 }
 
 // Returns true if queueArn is for an Redis queue.

cmd/object-api-common.go

@@ -134,10 +134,7 @@ func isLocalStorage(ep *url.URL) bool {
 	if globalMinioHost != "" && globalMinioPort != "" {
 		// if --address host:port was specified for distXL we short
 		// circuit only the endPoint that matches host:port
-		if net.JoinHostPort(globalMinioHost, globalMinioPort) == ep.Host {
-			return true
-		}
-		return false
+		return net.JoinHostPort(globalMinioHost, globalMinioPort) == ep.Host
 	}
 	// Split host to extract host information.
 	host, _, err := net.SplitHostPort(ep.Host)

cmd/object_api_suite_test.go

@@ -243,7 +243,7 @@ func testPaging(obj ObjectLayer, instanceType string, c TestErrHandler) {
 	if len(result.Objects) != 0 {
 		c.Errorf("%s: Number of objects in the result different from expected value.", instanceType)
 	}
-	if result.IsTruncated != false {
+	if result.IsTruncated {
 		c.Errorf("%s: Expected IsTruncated to be `false`, but instead found it to be `%v`", instanceType, result.IsTruncated)
 	}
 
@@ -263,7 +263,7 @@ func testPaging(obj ObjectLayer, instanceType string, c TestErrHandler) {
 		if len(result.Objects) != i+1 {
 			c.Errorf("%s: Expected length of objects to be %d, instead found to be %d", instanceType, len(result.Objects), i+1)
 		}
-		if result.IsTruncated != false {
+		if result.IsTruncated {
 			c.Errorf("%s: Expected IsTruncated to be `false`, but instead found it to be `%v`", instanceType, result.IsTruncated)
 		}
 	}
@@ -282,7 +282,7 @@ func testPaging(obj ObjectLayer, instanceType string, c TestErrHandler) {
 		if len(result.Objects) != 5 {
 			c.Errorf("%s: Expected length of objects to be %d, instead found to be %d", instanceType, 5, len(result.Objects))
 		}
-		if result.IsTruncated != true {
+		if !result.IsTruncated {
 			c.Errorf("%s: Expected IsTruncated to be `true`, but instead found it to be `%v`", instanceType, result.IsTruncated)
 		}
 	}
@@ -683,7 +683,7 @@ func testListObjectsTestsForNonExistantBucket(obj ObjectLayer, instanceType stri
 	if len(result.Objects) != 0 {
 		c.Fatalf("%s: Expected number of objects in the result to be `%d`, but instead found `%d`", instanceType, 0, len(result.Objects))
 	}
-	if result.IsTruncated != false {
+	if result.IsTruncated {
 		c.Fatalf("%s: Expected IsTruncated to be `false`, but instead found it to be `%v`", instanceType, result.IsTruncated)
 	}
 	if err.Error() != "Bucket not found: bucket" {

cmd/signature-v4-parser_test.go

@@ -569,7 +569,7 @@ func TestDoesV4PresignParamsExist(t *testing.T) {
 func TestParsePreSignV4(t *testing.T) {
 	// converts the duration in seconds into string format.
 	getDurationStr := func(expires int) string {
-		return strconv.FormatInt(int64(expires), 10)
+		return strconv.Itoa(expires)
 	}
 	// used in expected preSignValues, preSignValues.Date is of type time.Time .
 	queryTime := time.Now().UTC()

cmd/test-utils_test.go

@@ -1690,9 +1690,7 @@ func removeDiskN(disks []string, n int) {
 // Makes a entire new copy of a StorageAPI slice.
 func deepCopyStorageDisks(storageDisks []StorageAPI) []StorageAPI {
 	newStorageDisks := make([]StorageAPI, len(storageDisks))
-	for i, disk := range storageDisks {
-		newStorageDisks[i] = disk
-	}
+	copy(newStorageDisks, storageDisks)
 	return newStorageDisks
 }
 

cmd/web-handlers_test.go

@@ -696,7 +696,7 @@ func testUploadWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler
 		t.Fatalf("Failed, %v", err)
 	}
 
-	if bytes.Compare(byteBuffer.Bytes(), content) != 0 {
+	if !bytes.Equal(byteBuffer.Bytes(), content) {
 		t.Fatalf("The upload file is different from the download file")
 	}
 
@@ -782,7 +782,7 @@ func testDownloadWebHandler(obj ObjectLayer, instanceType string, t TestErrHandl
 		t.Fatalf("Expected the response status to be 200, but instead found `%d`", code)
 	}
 
-	if bytes.Compare(bodyContent, content) != 0 {
+	if !bytes.Equal(bodyContent, content) {
 		t.Fatalf("The downloaded file is corrupted")
 	}
 
@@ -805,7 +805,7 @@ func testDownloadWebHandler(obj ObjectLayer, instanceType string, t TestErrHandl
 		t.Fatalf("Expected the response status to be 200, but instead found `%d`", code)
 	}
 
-	if bytes.Compare(bodyContent, content) != 0 {
+	if !bytes.Equal(bodyContent, content) {
 		t.Fatalf("The downloaded file is corrupted")
 	}
 }

cmd/xl-v1-list-objects-heal.go

@@ -133,7 +133,7 @@ func (xl xlObjects) listObjectsHeal(bucket, prefix, marker, delimiter string, ma
 		nextMarker = objInfo.Name
 		objInfos = append(objInfos, objInfo)
 		i++
-		if walkResult.end == true {
+		if walkResult.end {
 			eof = true
 			break
 		}

cmd/xl-v1.go

@@ -161,12 +161,7 @@ func newXLObjects(storageDisks []StorageAPI) (ObjectLayer, error) {
 	xl.writeQuorum = writeQuorum
 
 	// Do a quick heal on the buckets themselves for any discrepancies.
-	if err := quickHeal(xl.storageDisks, xl.writeQuorum, xl.readQuorum); err != nil {
-		return xl, err
-	}
-
-	// Return successfully initialized object layer.
-	return xl, nil
+	return xl, quickHeal(xl.storageDisks, xl.writeQuorum, xl.readQuorum)
 }
 
 // Shutdown function for object storage interface.