lol match leader

LolMatchLeader.lua

-- project      : LolMatchLeader
-- author       : younger.shen
-- filename     : LolMatchLeader.lua
-- filepath     : /C/Users/Administrator/Desktop/LolMatchLeader.lua
[[
    该程序用来确定某一个lol队伍的leader.
    请求格式：
    /?gameid=xxx&server=xxx&teamid=xxx&player=xxx
    返回格式:
    
    <?xml version="1.0" encoding="UTF-8"?>
    <result>true</result>

    lol_match_dict 是在ngx里配置好的全局table
]]

module("LolMatchLeader", package.seeall)
--conf
local expired_time = 10000000
local lol_match_dict = ngx.shared.lol_match_dict
--conf over

function make_xml(val)
    local flag = val or "false"
    return [[<?xml version="1.0" encoding="UTF-8"?><result>]] .. flag ..[[</result>]] 
end

function process_request()
    local args = ngx.req.get_uri_args()
    ngx.req.set_header("Content-Type", "application/xml")
    local gameid = args.gameid
    local server = args.server
    local teamid = args.teamid
    local player = args.player
    if check_args_invaild(gameid, server, teamid, player) then
        
        local key = string.lower(server) .. '_' .. string.lower(gameid) .. '_' .. string.lower(teamid)
        player    = string.lower(player) 
        local val = lol_match_dict:get(key)
        if val then
            if val == player then
                local ret = make_xml("true")
                ngx.say(ret)
                return
            else
                local ret = make_xml()
                ngx.say(ret)
                return
            end
            -- already  cached in the table
        else
            local success, err, _ = lol_match_dict:set(key, player, expired_time)
            if success then
                local ret = make_xml("true")
                ngx.say(ret)
                return
            else
                ngx.say("stored failed check log please")
                return
            end 
            -- no really cached in the table
        --endif
        end
    --endif     
    else
        ngx.say("bad get args")
    end
end

-- utils function 
function check_args_invaild(...)
    local len = select('#', ...)
    for i=1, len do 
        local val = select(i, ...)
        if not val or val == '' then
            return false
        end
    end
    return true
end

-- main method

process_request()

40: 考虑大小写