Simple Protocol Parser

Actually, this is ssdb's network protocol, and I think it can be used on other projects.

Support Lua5.1/Lua5.2/Lua5.3/LuaJIT

• Nodejs Port: https://github.com/hit9/spp_node
• Python Port: https://github.com/hit9/spp_py

Protocol

Packet := Block+ '\n'
Block  := Size '\n' Data '\n'
Size   := literal_integer
Data   := string_bytes

For example:

3
set
3
key
3
val

Build

$ make 

To build for resty:

$ DFLAGS=-DSPP_LIB_PATH=resty_ssdb_spp_lua make

Usage

This package only provides parser, because packing is easy to do.

Parsing example:

local spp = require('spp_lua')
local parser = spp:new()

parser:feed("2\nok\n4\nbody\n\n")

while true do
    res = parser:get()
    if res == nil then 
        break
    else
        for i=1, #res do print(res[i]) end
    end
end
-- Output:
-- ok
-- body

API Ref

• spp:new()
• parser:feed(string)
• parser:get()
• parser:clear()

Bench

spp parser: 500000 in 2.000000s => 250000.000000ops
lua parser: 500000 in 4.000000s => 125000.000000ops

License

MIT (c) 2014, hit9 (Chao Wang).