openresty for nginx

nginx.conf

server {
        listen       5000;
        server_name  netgear.ngrok.wang;

        charset utf-8;

        access_log  logs/koolshare.access.log  main;
                error_log   logs/error.koolshare.log info;

        location  / {
                        root   /usr/local/openresty/nginx/webs/koolshare.github.io;
                        set_by_lua $callback '
                                function get_callback()
                                        local args = ngx.req.get_uri_args()
                                        if type(args["callback"]) ~= "nil" and args["callback"] then
                                                if type(args["callback"]) == "table" then
                                                        args["callback"] = args["callback"][#args["callback"]]
                                                end
                                                local callback = args["callback"]
                                                if type(callback) == "nil" then
                                                        return nil
                                                else
                                                        return callback
                                                end
                                        else
                                                return nil
                                        end
                                end

                                return get_callback()
                        ';
                        header_filter_by_lua '
                                if ngx.var.callback ~= "" and (ngx.header["Content-Type"] == "application/javascript; charset=utf-8" or ngx.header["Content-Type"] == "application/javascript") then
                                        ngx.header.content_length = nil
                                else
                                        ngx.var.callback = nil
                                end
                        ';
                        body_filter_by_lua '
                                if ngx.var.callback then
                                        local resp_body = ngx.arg[1]
                                        ngx.ctx.buffered = (ngx.ctx.buffered or "") .. resp_body
                                        if ngx.arg[2] then
                                                ngx.arg[1] = ngx.var.callback .. "(" .. ngx.ctx.buffered .. ")"
                                                return
                                        end
                                        ngx.arg[1] = nil
                                end
                        ';
 }

                location /incoming {
                        content_by_lua '
                                local res = os.execute("/bin/sh /usr/local/openresty/nginx/webs/build/deploy.sh")
                                ngx.header.content_type = "text/html; charset=utf-8"
                                ngx.say(res)
                                ngx.exit(ngx.HTTP_OK)
                        ';
                }

        error_page  404              /404.html;
        }