[A Lua script for grep hash md5 with nginx] #lua #nginx

hashgrep_md5.lua

function split( str,reps )
    local res = {}
    string.gsub(str,'[^'..reps..']+',function ( w )
        table.insert(res,w)
    end)
    return res
end
local hashfile = '/data/hashgrep/hash_md5.vir'
if "GET" == ngx.var.request_method then
    local args, err = ngx.req.get_uri_args()
    if args ~= nil then
        local _start = args['pos'] or 0
        local _code = args['code'] or 0
        if _start and _code then
            local p = nil
            local res = nil
            local _c = ""
            if _start then
                _c = '[a-f0-9]{'.._start..'}'
            end
            p = io.popen("grep -E '\\d* ".._c.._code.."' "..hashfile)
            res = p:read("*l")
            p:close()
            if string.len(res) > 32 then
                local ra = nil
                ra = split(res,' ')
                res = '{"num":"'..ra[1]..'","md5":"'..ra[2]..'","code":"'.._code..'"}'
            else
                res = '{"error":"Not Found","code":"'.._code..'"}'
                ngx.status = ngx.NGX_HTTP_NOT_FOUND
            end
            ngx.header.content_type = "application/json"
            -- ngx.req.set_header("Content-Type", "application/json;charset=utf8");
            ngx.say(res)
            ngx.exit(0)
        end
    end
end
ngx.status = ngx.HTTP_INTERNAL_SERVER_ERROR
ngx.say("")