SPIKE: Initial proxy design

[palkan]

• Implemented state-machine like pattern to handle different session states: handshake (waiting for SELECT), regular (processing regular commands); further development: multi state.
• Added fastlane API to intercept commands which do not require calling Redis (e.g., PING, CLIENT); maybe, we'll be able to implement SCRIPT using this API as well.
• Added basic interfaces for Redis (Command and Client).

[palkan]

@skryukov Couldn't find a way to retrieve a raw Redis response using the existing APIs.

One idea is to use a custom cmder implementation with overriden readReply function. But we cannot simply add our own from the outside, 'cause it relies on some internal (I mean, from internal/redis/bla-bla) structs.

Would you like to fork go-redis and implement a rawCmd 🙂?_)

[skryukov]

Here it is skryukov/redis@master...skryukov:feature/raw-bytes