Fix for CVE-2019-17572 in apache/rocketmq (project apache__rocketmq_CVE-2019-17572_4.6.0), commit f8f6fbe4aa7f5dee937e688322628c366b12a552
Fixed file: client/src/main/java/org/apache/rocketmq/client/Validators.java
Fixed class: Validators (lines 32-109)
Fixed method: checkTopic (lines 109-127)
Method signature: void checkTopic(String)