// https://github.com/nginx/nginx/blob/9842cff/src/http/ngx_http_request.h#L120-L126 /* * HTTP does not define the code for the case when a client closed * the connection while we are processing its request so we introduce * own code to log such situation when a client has closed the connection * before we even try to send the HTTP header to it */ #define NGX_HTTP_CLIENT_CLOSED_REQUEST 499 HTTP標準で