wafplugin cache bug

[crazyStar00]

Is there an existing issue for this?

• [X] I have searched the existing issues

Current Behavior

1. The access to the system using the network segment 192.168.40 is blocked, as expected
2. The network segment 192.168.42 is used to access the system. The forwarding is normal and meets expectations
3. The network segment 192.168.40 is used to access the system, and the forwarding is normal

Cause of the problem:

1. When network segment 192.168.42 accesses the system and no rule is matched, an empty rule is added to the MatchDataCache.RULE_DATA_MAP cache
2. When the 192.168.40 network segment is used again, the null rule is obtained from the MatchDataCache.RULE_DATA_MAP cache, and the actual rule does not take effect

Temporary solutions:

1. Modify defaultMatchRule in AbstractShenyuPlugin to write the empty rule rule to cached code comments

I don't understand. Why do we need to cache empty rules？

[moremind]

can you fix it?

[crazyStar00]

can you fix it?

I'd like to, but I don't understand why an empty object is put in the cache when no data is retrieved

[crazyStar00]

can you fix it?

I'd like to, but I don't understand why an empty object is put in the cache when no data is retrieved

I did this directly, I wonder if it is OK?

[moremind]

no, empty rule data or selector data means can't match the rule or selector

[moremind]

you can close the match cache to avoid cache error.

[crazyStar00]

thanks