NGX_HTTP_IMAGE_NONE 307 src/http/modules/ngx_http_image_filter_module.c if (ctx->type == NGX_HTTP_IMAGE_NONE) { NGX_HTTP_IMAGE_NONE 418 src/http/modules/ngx_http_image_filter_module.c return NGX_HTTP_IMAGE_NONE; NGX_HTTP_IMAGE_NONE 446 src/http/modules/ngx_http_image_filter_module.c return NGX_HTTP_IMAGE_NONE;