NGX_HTTP_IMAGE_PASS  313 http/modules/ngx_http_image_filter_module.c             ctx->phase = NGX_HTTP_IMAGE_PASS;
NGX_HTTP_IMAGE_PASS  349 http/modules/ngx_http_image_filter_module.c         ctx->phase = NGX_HTTP_IMAGE_PASS;
NGX_HTTP_IMAGE_PASS  353 http/modules/ngx_http_image_filter_module.c     case NGX_HTTP_IMAGE_PASS: