对post请求增加%号过滤

匹配过滤前，url解码后先替换url里的%号为空

waf.lua

@@ -94,7 +94,7 @@ else
     if ngx.re.match(string.gsub(ngx.unescape_uri(ngx.var.request_uri),"%%",""),regex.."|"..get,"isjo") then
         log('GET',ngx.unescape_uri(ngx.var.request_uri))
         check()
-    elseif ngx.req.get_body_data() and ngx.re.match(ngx.unescape_uri(ngx.req.get_body_data()),regex,"isjo")then
+    elseif ngx.req.get_body_data() and ngx.re.match(string.gsub(ngx.unescape_uri(ngx.req.get_body_data()),"%%",""),regex,"isjo")then
         log('POST',ngx.unescape_uri(ngx.var.request_uri),ngx.unescape_uri(ngx.req.get_body_data()))
         check()
 --    elseif ngx.req.get_headers()["Cookie"] and ngx.re.match(ngx.unescape_uri(ngx.req.get_headers()["Cookie"]),regex,"isjo")then