敏感词检测

 传送门https://github.com/ccppluagopy/SensitiveWord-Lua

转这个位置已经写的很棒了，然后稍微修改一下，改用小写来检测，原文替换保留大写的原文

function MsgParser:getString(s)
	if type(s) ~= 'string' then return end
	local i = 1
	local len = strLen(s)
	local word, idx, tmps
	local returnStr = s;
    s = string.lower(s);
	while true do
    	word = strSub(s, i)
    	idx = _detect(_tree, word, i)

    	if idx then
    		tmps = strSub(s, 1, i-1)
    		for j=1, idx-i+1 do
    			tmps = tmps .. _maskWord
    		end
    		s = tmps .. strSub(s, idx+1)

            tmps1 = strSub(returnStr, 1, i-1)
    		for j=1, idx-i+1 do
    			tmps1 = tmps1 .. _maskWord
    		end
    		returnStr = tmps1 .. strSub(returnStr, idx+1)
    		i = idx+1
    	else
    		i = i + 1
    	end
    	if i > len then
    		break
    	end
    end
    return returnStr
end

　　这样我们使用就已经ok了