Redis协议规范
redis基于请求响应模型，协议力求简单、快捷，详情请参考官方规范文档。
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例子
请求
| 命令 | 协议格式 |
|---|---|
| LLEN mylist | "*2\r\n$4\r\nLLEN\r\n$6\r\nmylist\r\n |
响应
| 响应类型 | 响应内容 |
|---|---|
| Simple Strings | +OK\r\n |
| Errors | -ERR unknown command 'foobar'\r\n |
| Errors | -WRONGTYPE Operation against a key holding the wrong kind of value |
| Integers | :1000\r\n |
| Bulk Strings | $6\r\n\foobar\r\n |
| Bulk Strings | $0\r\n\r\n |
| Bulk Strings | $-1\r\n |
| Arrays | *0\r\n |
| Arrays | *2\r\n$3\r\nfoo\r\n$3\r\nbar\r\n |
| Arrays | *2\r\n*3\r\n:1\r\n:2\r\n:3\r\n*2\r\n+Foo\r\n-Bar\r\n |
