fix: +srv mongodb url scheme parsing bug

This commit fixs issue #5760. where OP was facing problem with +srv schema

Signed-off-by: Rishikesh Betigeri <53863619+Rishikesh01@users.noreply.github.com>

CHANGELOG.md

@@ -68,7 +68,7 @@ Here is an overview of all new **experimental** features:
 
 ### Fixes
 
-- TODO ([#XXX](https://github.com/kedacore/keda/issues/XXX))
+- **General**: fix `+srv` mongodb url scheme parsing bug ([#5760](https://github.com/kedacore/keda/issues/5760))
 
 ### Deprecations
 

pkg/scalers/mongo_scaler.go

@@ -202,6 +202,9 @@ func parseMongoDBMetadata(config *scalersconfig.ScalerConfig) (*mongoDBMetadata,
 
 	if meta.connectionString != "" {
 		connStr = meta.connectionString
+	} else if meta.scheme == "mongodb+srv" {
+		connStr = fmt.Sprintf("%s://%s:%s@%s/%s", meta.scheme, url.QueryEscape(meta.username), url.QueryEscape(meta.password), meta.host, meta.dbName)
+
 	} else {
 		// Build connection str
 		addr := net.JoinHostPort(meta.host, meta.port)

pkg/scalers/mongo_scaler_test.go

@@ -73,7 +73,7 @@ var testMONGODBMetadata = []parseMongoDBMetadataTestData{
 	// mongodb srv support
 	{
 		metadata:    map[string]string{"query": `{"name":"John"}`, "collection": "demo", "queryValue": "12"},
-		authParams:  map[string]string{"dbName": "test", "scheme": "mongodb+srv", "host": "localhost", "port": "1234", "username": "sample", "password": "sec@ure"},
+		authParams:  map[string]string{"dbName": "test", "scheme": "mongodb+srv", "host": "localhost", "port": "", "username": "sample", "password": "sec@ure"},
 		resolvedEnv: testMongoDBResolvedEnv,
 		raisesError: false,
 	},
@@ -90,7 +90,7 @@ var mongoDBConnectionStringTestDatas = []mongoDBConnectionStringTestData{
 	{metadataTestData: &testMONGODBMetadata[2], connectionString: "mongodb://mongodb0.example.com:27017"},
 	{metadataTestData: &testMONGODBMetadata[3], connectionString: "mongodb://sample:test%40password@localhost:1234/test"},
 	{metadataTestData: &testMONGODBMetadata[4], connectionString: "mongodb://sample:sec%40ure@localhost:1234/test"},
-	{metadataTestData: &testMONGODBMetadata[5], connectionString: "mongodb+srv://sample:sec%40ure@localhost:1234/test"},
+	{metadataTestData: &testMONGODBMetadata[5], connectionString: "mongodb+srv://sample:sec%40ure@localhost/test"},
 }
 
 var mongoDBMetricIdentifiers = []mongoDBMetricIdentifier{

pkg/scalers/scaler.go

@@ -79,6 +79,8 @@ func GetFromAuthOrMeta(config *scalersconfig.ScalerConfig, field string) (string
 		result = config.AuthParams[field]
 	} else if config.TriggerMetadata[field] != "" {
 		result = config.TriggerMetadata[field]
+	} else if value, ok := config.AuthParams["scheme"]; ok && strings.Contains(value, "mongodb+srv") {
+		return result, err
 	}
 	if result == "" {
 		err = fmt.Errorf("%w: no %s given", ErrScalerConfigMissingField, field)