Lua 的 IO 框架：Luajit IO
jopen
10年前
Luajit IO 是一个纯 Lua 的 IO 框架，提供 C 的高效率，简单但强大的设计，得益于 luajit 这个 JIT 引擎。可用来开发 TCP/UDP 服务器程序。
下面是连接 redis 的示例代码：
local ffi = require"ffi" local null = ffi.new("void*") local redis = require "resty.redis" local function test_redis(req, rsp) local red = redis:new() -- red:set_timeout(1000) -- 1 sec -- or connect to a unix domain socket file listened -- by a redis server: -- local ok, err = red:connect("unix:/path/to/redis.sock") local ok, err = red:connect("127.0.0.1", 6379) if not ok then rsp:say("failed to connect: ", err) return end ok, err = red:set("dog", "an animal") if not ok then rsp:say("failed to set dog: ", err) return end rsp:say("set result: ", ok) local res, err = red:get("dog") if not res then rsp:say("failed to get dog: ", err) return end if res == null then rsp:say("dog not found.") return end rsp:say("dog: ", res) red:init_pipeline() red:set("cat", "Marry") red:set("horse", "Bob") red:get("cat") red:get("horse") local results, err = red:commit_pipeline() if not results then rsp:say("failed to commit the pipelined requests: ", err) return end for i, res in ipairs(results) do if type(res) == "table" then if not res[1] then rsp:say("failed to run command ", i, ": ", res[2]) else -- process the table value end else -- process the scalar value end end -- put it into the connection pool of size 100, -- with 10 seconds max idle time local ok, err = red:set_keepalive(10000, 100) if not ok then rsp:say("failed to set keepalive: ", err) return end -- or just close the connection right away: -- local ok, err = red:close() -- if not ok then -- rsp:say("failed to close: ", err) -- return -- end end return test_redis