NGX_HTTP_IMAGE_JPEG 408 http/modules/ngx_http_image_filter_module.c return NGX_HTTP_IMAGE_JPEG; NGX_HTTP_IMAGE_JPEG 630 http/modules/ngx_http_image_filter_module.c case NGX_HTTP_IMAGE_JPEG: NGX_HTTP_IMAGE_JPEG 985 http/modules/ngx_http_image_filter_module.c case NGX_HTTP_IMAGE_JPEG: NGX_HTTP_IMAGE_JPEG 1054 http/modules/ngx_http_image_filter_module.c case NGX_HTTP_IMAGE_JPEG: