Z_DEFLATED 608 http/modules/ngx_http_gzip_filter_module.c rc = deflateInit2(&ctx->zstream, (int) conf->level, Z_DEFLATED, Z_DEFLATED 631 http/modules/ngx_http_gzip_filter_module.c { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };