Nuxt.js 3中setCookie报错：Cannot read properties of undefined (reading 'getHeader')

登录成功后执行以下方法发送refresh token：

export const sendRefreshToken = (event, token) => {
    setCookie(event.res, "refresh_token", token, {
        httpOnly: true,
        sameSite: true
    })
}

服务器返回500错误，控制台报错：

[nuxt] [request error] [unhandled] [500] Cannot read properties of undefined (reading 'getHeader')
  at appendResponseHeader (/C:/Development/Node_Projects/quiz/node_modules/h3/dist/index.mjs:289:27)
  at setCookie (/C:/Development/Node_Projects/quiz/node_modules/h3/dist/index.mjs:358:3)
  at sendRefreshToken (/C:/Development/Node_Projects/quiz/.nuxt/dev/index.mjs:649:3)
  at /C:/Development/Node_Projects/quiz/.nuxt/dev/index.mjs:697:3
  at async Server.toNodeHandle (/C:/Development/Node_Projects/quiz/node_modules/h3/dist/index.mjs:698:7)
  at async Server.toNodeHandle (/C:/Development/Node_Projects/quiz/node_modules/h3/dist/index.mjs:698:7)

问题原因 #

错误传递了event.res给setCookie方法。在Nuxt 3（基于h3框架）中，setCookie的第一个参数要求直接传入event对象，而非event.res。直接传event.res会导致h3内部无法找到所需的响应方法，触发"Cannot read properties of undefined"错误。

修正代码 #

将event.res替换为event：

export const sendRefreshToken = (event, token) => {
    setCookie(event, "refresh_token", token, {
        httpOnly: true,
        sameSite: true
    })
}

内容的提问来源于stack exchange，提问作者Nand