go-sql-driver / mysql

Go MySQL Driver is a MySQL driver for Go's (golang) database/sql package
https://pkg.go.dev/github.com/go-sql-driver/mysql
Mozilla Public License 2.0
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Fix auth errors when username/password are too long (#1482) #1625

Open kratkyzobak opened 3 weeks ago

kratkyzobak commented 3 weeks ago

Description

Targets issue in #1482. When username/password (JWT token usually) are too long, there are unable to fit into buffer, which has only 4k at connection startup. Using takeBuffer (which autogrows) instead of takeSmallBuffer should work in this case.

I did not find any "better" solution to this problem as checking length of packet before choosing buffer would be practicaly the same logic and conditions, what takeBuffer does. If there is need to use takeSmallBuffer for perfomrance reasons, there can be takeSmallBuffer kept and takeBuffer called only after failure, which seems to be ugliest solution.

Checklist

Summary by CodeRabbit

coderabbitai[bot] commented 3 weeks ago

Walkthrough

The recent changes focus on enhancing project documentation and modifying buffer management within the code. Jakub Adamus has been added to the AUTHORS file to acknowledge his contributions. Additionally, the writeAuthSwitchPacket method in packets.go has been updated to use a different buffer acquisition method, potentially improving memory management and packet construction during authentication processes.

Changes

File Change Summary
AUTHORS Added Jakub Adamus as a contributor.
packets.go Modified writeAuthSwitchPacket to use takeBuffer(pktLen) instead of takeSmallBuffer(pktLen).

Poem

In the code where rabbits hop,
Contributions never stop!
Jakub's name now shines so bright,
Buffers change to take new flight.
Celebrate with joy and cheer,
For every change brings us near! 🐇✨


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coveralls commented 3 weeks ago

Coverage Status

coverage: 82.385%. remained the same when pulling 80e71912394645b611db00976c876c66ef2a003a on kratkyzobak:fix-1482 into 2f1527670cb7207fd213f92c7120f9387fe256cf on go-sql-driver:master.