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can't set headers after they are sent
時間 2021-01-08
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nodejs
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今天在學習express框架優美靜態路由時,遇到了一個問題: 錯誤顯示:can’t set headers after they are sent 不能發送header,因爲已經發送過一次了 服務器在處理HTTP請求的時候,會先輸出響應頭,然後輸出主體內容,而一旦輸出過一次響應頭(比如:執行res.writeHead()或res.write()或res.end()),當我們再嘗試通過res.set
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