Module resp 

RESP2: the Redis serialization protocol, encoder and decoder.

RESP is five type-tagged, CRLF-terminated forms:

+OK\r\n                     simple string
-ERR unknown command\r\n    error
:42\r\n                     integer
$5\r\nhello\r\n             bulk string (a length, then exactly that many bytes)
$-1\r\n                     the null bulk string — "no such key"
*2\r\n:1\r\n:2\r\n          array, which may nest

Commands go the other way as an array of bulk strings, which is the only form a Redis server accepts from a client and the only one that is safe: because every argument carries its own byte length, a value containing a newline, a space, or a quote cannot be read as a second argument. That is this module’s answer to command injection, and it is why nothing here ever builds a command by formatting a string.

The decoder is incremental: decode returns Ok(None) when the buffer holds only part of a reply, so the connection can read more bytes and try again without any framing state of its own.

Enums

Value

One decoded RESP value.

Functions

decode

Decode one value from the front of input.

encode_command

Encode a command as an array of bulk strings.