fix table concat bug

config.lua

@@ -8,6 +8,7 @@ postMatch="on"
 whiteModule="on" 
 black_fileExt={"php","jsp"}
 ipWhitelist={"127.0.0.1"}
+servernameWhitelist={"www.xx.com"}
 ipBlocklist={"1.0.0.1"}
 CCDeny="off"
 CCrate="100/60"

init.lua

@@ -241,3 +241,15 @@ function blockip()
      end
          return false
 end
+
+function whiteSvrName()
+   if next(servernameWhitelist) ~= nil then
+       for _,svrname in pairs(servernameWhitelist) do
+           if ngx.var.server_name == svrname then
+               return true
+           end
+       end
+   end
+       return false
+end
+

waf.lua

@@ -3,6 +3,7 @@ local method=ngx.req.get_method()
 local ngxmatch=ngx.re.match
 if whiteip() then
 elseif blockip() then
+elseif whiteSvrName() then
 elseif denycc() then
 elseif ngx.var.http_Acunetix_Aspect then
     ngx.exit(444)