跨域失敗 The 'Access-Control-Allow-Origin' header contains multiple values - 碼上歡樂

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跨域失敗 The 'Access-Control-Allow-Origin' header contains multiple values

本文轉載自查看原文 2021-12-22 14:37 2987

Access to XMLHttpRequest at 'xxx' from origin 'xxx' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed.

背景: 我的后端使用了 Django + corsheaders 允許跨域, 而昨天同事在配置 Nginx 時, 將整個 server 塊都添加了跨域支持, 也就是在同一個響應報文里, Access-Control-Allow-Origin 頭被設置了兩次(corsheaders 設置一次, 在nginx中又被設置了一次), 也就成為了多值(本應該是'*', 實際返回的是'*, *'), 導致瀏覽器禁止跨域.

解決方案就是把 Nginx 中的 add_header Access-Control-Allow-Origin *;指令, 應用在同事的 location 塊而非整個 server 塊, 恢復正常.

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