在 NEXTJS 中将变量从客户端传递到服务器端

我已经这样做了，但是我想知道为什么当我尝试在另一个代码中再次应用它时它不起作用。所以我有这个代码“客户端”

const response = await fetch("/api/ipfs", {method: "POST", DATA: "holaaaa"});
if (!response.ok) {
    throw new Error(`Error: ${response.status}`);
}
const result = await response.json()
console.log(result.result)

而这个是“服务器端”

function uploadIPFS(req, res) {
  axios.get(req.body).then(r => {
  
    let metadata = r.data

    res.status(200).json({ metadata: metadata });
  }).catch(err => console.error(err))
}

export default function handler(req, res) {
  if (req.method==='POST') {
      uploadIPFS(req, res);
  }
}    

这与我拥有的另一个 api 文件一起工作，所以我实现了另一个文件，即这个文件，并在客户端的另一个函数中调用新的 api 文件，问题是我想从客户端传递到服务器的变量是身体之一，说“holaaaa”的那个，它不工作并且抛出这个错误。

    API resolved without sending a response for /api/ipfs, this may result in stalled requests.
Error: Cannot read properties of null (reading 'replace')
    at dispatchHttpRequest (C:\Users\berna\Desktop\Programming\Web development\BlueToken\bluetoken\node_modules\axios\lib\adapters\http.js:161:23)
    at new Promise (<anonymous>)
    at httpAdapter (C:\Users\berna\Desktop\Programming\Web development\BlueToken\bluetoken\node_modules\axios\lib\adapters\http.js:49:10) 
    at dispatchRequest (C:\Users\berna\Desktop\Programming\Web development\BlueToken\bluetoken\node_modules\axios\lib\core\dispatchRequest.js:58:10)
    at Axios.request (C:\Users\berna\Desktop\Programming\Web development\BlueToken\bluetoken\node_modules\axios\lib\core\Axios.js:109:15) 
    at Axios.<computed> [as get] (C:\Users\berna\Desktop\Programming\Web development\BlueToken\bluetoken\node_modules\axios\lib\core\Axios.js:131:17)
    at Function.wrap [as get] (C:\Users\berna\Desktop\Programming\Web development\BlueToken\bluetoken\node_modules\axios\lib\helpers\bind.js:9:15)
    at uploadIPFS (webpack-internal:///(api)/./pages/api/ipfs.js:17:11)
    at handler (webpack-internal:///(api)/./pages/api/ipfs.js:37:9)
    at Object.apiResolver (C:\Users\berna\Desktop\Programming\Web development\BlueToken\bluetoken\node_modules\next\dist\server\api-utils\node.js:184:15) {
config: {
    transitional: {
    silentJSONParsing: true,
    forcedJSONParsing: true,
    clarifyTimeoutError: false
    },
    adapter: [Function: httpAdapter],
    transformRequest: [ [Function: transformRequest] ],
    transformResponse: [ [Function: transformResponse] ],
    timeout: 0,
    xsrfCookieName: 'XSRF-TOKEN',
    xsrfHeaderName: 'X-XSRF-TOKEN',
    maxContentLength: -1,
    maxBodyLength: -1,
    env: { FormData: [Function] },
    validateStatus: [Function: validateStatus],
    headers: {
    Accept: 'application/json, text/plain, */*',
    'User-Agent': 'axios/0.27.2'
    },
    method: 'get',
    url: '',
    data: undefined
},
url: '',
exists: true
}

有什么想法吗？