JDBC detector matches & attempts to verify empty connection strings

[rgmz]

The JDBC detector matches results with no actual connection string (e.g., jdbc:postgresql://), resulting in extraneous verification attempts with no/default information.

MySQL

Found unverified result 🐷🔑❓
Verification issue: dial tcp 127.0.0.1:3306: connect: connection refused
Detector Type: JDBC
Decoder Type: PLAIN
Raw result: jdbc:mysql://
File: dataduct/pipeline/mysql_node.py
Line: 37
Link: https://github.com/recurly/dataduct/blob/d0f94a199ca694260dac98c8bf1ec4af2ce1adf3/dataduct/pipeline/mysql_node.py#L37
Repository: https://github.com/recurly/dataduct.git
Timestamp: 2018-07-13 21:15:36 +0000

Postgres

Found unverified result 🐷🔑❓
Verification issue: dial tcp [::1]:5432: connect: connection refused
dial tcp [::1]:5432: connect: connection refused
Detector Type: JDBC
Decoder Type: PLAIN
Raw result: jdbc:postgresql://
Commit: 949ac19005d982b2e7ed75cce43d867a17047b52
File: src/main/java/com/impossibl/postgres/jdbc/AbstractDataSource.java
Line: 241
Link: https://github.com/NinjaRMM/pgjdbc-ng/blob/949ac19005d982b2e7ed75cce43d867a17047b52/src/main/java/com/impossibl/postgres/jdbc/AbstractDataSource.java#L241
Repository: https://github.com/NinjaRMM/pgjdbc-ng.git
Timestamp: 2013-11-01 03:31:20 +0000

[kashifkhan0771]

Should we check this in the code logic and filter out the invalid ones? e.g

// isEmptyConnectionString check if the connectionString has something after "://"
func isEmptyConnectionString(connStr string) bool {
	parts := strings.Split(connStr, "://")
	return len(parts[1]) > 0

}

[rgmz]

Imo both this and #1458 are pattern issues.