location /api/product/ {
deny all;
}
subs_filter_types application/json text/json;
subs_filter '"upstream_product_shopping_url"\s*:\s*"[^"]*"' ""upstream_product_shopping_url":null" gri;
鉴于目前修复方案可以会造成上下游同步失败，本方案仅对upstream_product_shopping_url字段替换为null
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