HTTP POST 请求在部署后并未从 NextJS 客户端发送到 Go 服务器，但它在开发期间有效

Question

它是带有 NextJS 和 Go 服务器的全栈 Web 应用程序。由于 NextJS 的限制，我必须首先对 NextJS 无服务器函数进行 api 调用。然后，从该无服务器函数将 http post 请求发送到 Go 后端。

在开发中一切都运行良好。但是在部署之后，即使“GET”请求有效，所有“POST”、“PUT”和“DELETE”方法都没有发送到服务器。客户端能够获取数据。

我假设服务器工作正常。它在开发过程中按预期工作，甚至在部署之后，http 请求与 POST MAN 一起工作得很好。

有趣的是，在部署之后，POST、PUT 和 DELETE 请求从未发送到服务器，除了 GET 请求

我还在 Go 服务器中设置了 CORS

客户端代码调用

api/clinic

    async function handleAdd(): Promise<void> {
        try {
            console.log("adding", clinic)
            const res = await axios.post('/api/clinic', clinic, {
                headers: {
                    'Content-Type': 'application/json',
                },
                withCredentials: true
            })
            const data = await res.data
            console.log("successfully add clinic", data)
            // window.location.reload()
        } catch (error) {
            console.error(error);
        }
    }

API函数向GO服务器发送http请求

    if (req.method === 'POST') {
        try {
            const response = await axios.post(`${process.env.NEXT_PUBLIC_URL}/admin/create-clinic`, clinic, {
                headers: {
                    'Content-Type': 'application/json',
                },
                withCredentials: true
            })
            const data = await response.data
            return res.end(JSON.stringify(data))
        } catch (err) {
            console.log(err)
            return res.end(JSON.stringify({"error": err.message }))
        }
    }

vercel 终端显示的错误

我不明白为什么请求标头设置为 GET，即使在代码中我确定它是 POST 请求

    [Symbol(kOutHeaders)]: [Object: null prototype] {
      accept: [Array],
      'user-agent': [Array],
      'accept-encoding': [Array],
      host: [Array]
    },
    [Symbol(errored)]: null,
    [Symbol(kUniqueHeaders)]: null
  },
  response: {
    status: 405,
    statusText: 'Method Not Allowed',
    headers: AxiosHeaders {
      date: 'Mon, 03 Apr 2023 06:20:36 GMT',
      'content-length': '0',
      server: 'railway',
      connection: 'close'
    },
    config: {
      transitional: [Object],
      adapter: [Array],
      transformRequest: [Array],
      transformResponse: [Array],
      timeout: 0,
      xsrfCookieName: 'XSRF-TOKEN',
      xsrfHeaderName: 'X-XSRF-TOKEN',
      maxContentLength: -1,
      maxBodyLength: -1,
      env: [Object],
      validateStatus: [Function: validateStatus],
      headers: [AxiosHeaders],
      withCredentials: true,
      method: 'post',
      url: 'https://cnaserver-production.up.railway.app//admin/create-clinic',
      data: '{"id":0,"name":"CNA 3","location":"Pyin Oo Lwin Main Road"}'
    },
    request: <ref *1> ClientRequest {
      _events: [Object: null prototype],
      _eventsCount: 7,
      _maxListeners: undefined,
      outputData: [],
      outputSize: 0,
      writable: true,
      destroyed: false,
      _last: true,
      chunkedEncoding: false,
      shouldKeepAlive: false,
      maxRequestsOnConnectionReached: false,
      _defaultKeepAlive: true,
      useChunkedEncodingByDefault: false,
      sendDate: false,
      _removedConnection: false,
      _removedContLen: false,
      _removedTE: false,
      strictContentLength: false,
      _contentLength: 0,
      _hasBody: true,
      _trailer: '',
      finished: true,
      _headerSent: true,
      _closed: false,
      socket: [TLSSocket],
      _header: 'GET /admin/create-clinic HTTP/1.1\r\n' +
        'Accept: application/json, text/plain, */*\r\n' +
        'User-Agent: axios/1.3.4\r\n' +
        'Accept-Encoding: gzip, compress, deflate, br\r\n' +
        'Host: cnaserver-production.up.railway.app\r\n' +
        'Connection: close\r\n' +
        '\r\n',
      _keepAliveTimeout: 0,
      _onPendingData: [Function: nop],
      agent: [Agent],
      socketPath: undefined,
      method: 'GET',
      maxHeaderSize: undefined,
      insecureHTTPParser: undefined,
      path: '/admin/create-clinic',
      _ended: true,
      res: [IncomingMessage],
      aborted: false,
      timeoutCb: null,
      upgradeOrConnect: false,
      parser: null,
      maxHeadersCount: null,
      reusedSocket: false,
      host: 'cnaserver-production.up.railway.app',
      protocol: 'https:',
      _redirectable: [Writable],
      [Symbol(kCapture)]: false,
      [Symbol(kBytesWritten)]: 0,
      [Symbol(kEndCalled)]: true,
      [Symbol(kNeedDrain)]: false,
      [Symbol(corked)]: 0,
      [Symbol(kOutHeaders)]: [Object: null prototype],
      [Symbol(errored)]: null,
      [Symbol(kUniqueHeaders)]: null
    },
    data: ''
  }
}

我期待在成功的 http 请求后响应中有一个 JSON 对象。但是请求从未发送到服务器。