I want to access to the slave server even if the master server is down.

This is my request for new function.

I'm using readwritesplit router.
I want to access to the slave server even if the master server is down.
If the master is down we can't see web site because of database is error.
I want to use reading SQLs in any situations.
I want to four options to handle writing SQLs when the master is down.

• ignore
• no response
• return error
• can choose ignore, no response or return error in the filter