有没有一种方法可以从api调用API以表达axios中的参数值未定义，如何从变量中添加axios中的参数

**我尝试将参数传递给我的路由，然后将该参数传递给带有URL的变量axios。如果我删除了params对象，而是将参数硬编码在url中，则请求成功。

我正在尝试发布问题，但是我的话很少，代码太多。我不知道如何解决这个问题，因此说明足以解决这个问题。我已经尽我所能解释了它。代码可以说明很多事情。谢谢。

const axios = require("axios");
dotenv.config();
const Url = "";
exports.getLocation = (req, res, next) => {
  const country = req.body.countryCode;
  axios
    .get(Url, {
      params: {
        countryCode: country}
      ,headers: {'DHL-API-Key': process.env.LOCATOR_API_KEY}})
    .then(function (response) {
      console.log(response.data);
    })
    .catch(function (error) {
      console.log(error);
    });
};```
//CODE CONSOLE LOG
**THIS IS THE CONSOLE LOG THE PARAMETER PART IS UNDEFINED HOW WILL I ADD THE PARAMETER

Error: Request failed with status code 400
    at createError (/media/ALWI/HACKERFOREVER/MyProjects/JULEYBIB_SHIPPING/server/node_modules/axios/lib/core/createError.js:16:15)
    at settle (/media/ALWI/HACKERFOREVER/MyProjects/JULEYBIB_SHIPPING/server/node_modules/axios/lib/core/settle.js:17:12)
    at IncomingMessage.handleStreamEnd (/media/ALWI/HACKERFOREVER/MyProjects/JULEYBIB_SHIPPING/server/node_modules/axios/lib/adapters/http.js:236:11)
    at IncomingMessage.emit (events.js:322:22)
    at endReadableNT (_stream_readable.js:1187:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21) {
  config: {
    url: '',
    method: 'get',
    params: { countryCode: undefined },
    headers: {
      Accept: 'application/json, text/plain, */*',
      'DHL-API-Key': '**********************',
      'User-Agent': 'axios/0.19.2'
    },
    transformRequest: [ [Function: transformRequest] ],
    transformResponse: [ [Function: transformResponse] ],
    timeout: 0,
    adapter: [Function: httpAdapter],
    xsrfCookieName: 'XSRF-TOKEN',
    xsrfHeaderName: 'X-XSRF-TOKEN',
    maxContentLength: -1,
    validateStatus: [Function: validateStatus],
    data: undefined
  },
  request: ClientRequest {
    _events: [Object: null prototype] {
      socket: [Function],
      abort: [Function],
      aborted: [Function],
      error: [Function],
      timeout: [Function],
      prefinish: [Function: requestOnPrefinish]
    },
    _eventsCount: 6,
    _maxListeners: undefined,
    outputData: [],
    outputSize: 0,
    writable: true,
    _last: true,
    chunkedEncoding: false,
    shouldKeepAlive: false,
    useChunkedEncodingByDefault: false,
    sendDate: false,
    _removedConnection: false,
    _removedContLen: false,
    _removedTE: false,
    _contentLength: 0,
    _hasBody: true,
    _trailer: '',
    finished: true,
    _headerSent: true,
    socket: TLSSocket {
      _tlsOptions: [Object],
      _secureEstablished: true,
      _securePending: false,
      _newSessionPending: false,
      _controlReleased: true,
      _SNICallback: null,
      servername: 'api.dhl',
      alpnProtocol: false,
      authorized: true,
      authorizationError: null,
      encrypted: true,
      _events: [Object: null prototype],
      _eventsCount: 9,
      connecting: false,
      _hadError: false,
      _parent: null,
      _host: 'api.dhl',
      _readableState: [ReadableState],
      readable: true,
      _maxListeners: undefined,
      _writableState: [WritableState],
      writable: false,
      allowHalfOpen: false,
      _sockname: null,
      _pendingData: null,
      _pendingEncoding: '',
      server: undefined,
      _server: null,
      ssl: [TLSWrap],
      _requestCert: true,
      _rejectUnauthorized: true,
      parser: null,
      _httpMessage: [Circular],
      [Symbol(res)]: [TLSWrap],
      [Symbol(asyncId)]: 301,
      [Symbol(kHandle)]: [TLSWrap],
      [Symbol(kSetNoDelay)]: false,
      [Symbol(lastWriteQueueSize)]: 0,
      [Symbol(timeout)]: null,
      [Symbol(kBuffer)]: null,
      [Symbol(kBufferCb)]: null,
      [Symbol(kBufferGen)]: null,
      [Symbol(kCapture)]: false,
      [Symbol(kBytesRead)]: 0,
      [Symbol(kBytesWritten)]: 0,
      [Symbol(connect-options)]: [Object]
    },

    connection: TLSSocket {
      _tlsOptions: [Object],
      _secureEstablished: true,
      _securePending: false,
      _newSessionPending: false,
      _controlReleased: true,
      _SNICallback: null,
      servername: 'api.dhl',
      alpnProtocol: false,
      authorized: true,
      authorizationError: null,
      encrypted: true,
      _events: [Object: null prototype],
      _eventsCount: 9,
      connecting: false,
      _hadError: false,
      _parent: null,
      _host: 'api.dhl',
      _readableState: [ReadableState],
      readable: true,
      _maxListeners: undefined,
      _writableState: [WritableState],
      writable: false,
      allowHalfOpen: false,
      _sockname: null,
      _pendingData: null,
      _pendingEncoding: '',
      server: undefined,
      _server: null,
      ssl: [TLSWrap],
      _requestCert: true,
      _rejectUnauthorized: true,
      parser: null,
      _httpMessage: [Circular],
      [Symbol(res)]: [TLSWrap],
      [Symbol(asyncId)]: 301,
      [Symbol(kHandle)]: [TLSWrap],
      [Symbol(kSetNoDelay)]: false,
      [Symbol(lastWriteQueueSize)]: 0,
      [Symbol(timeout)]: null,
      [Symbol(kBuffer)]: null,
      [Symbol(kBufferCb)]: null,
      [Symbol(kBufferGen)]: null,
      [Symbol(kCapture)]: false,
      [Symbol(kBytesRead)]: 0,
      [Symbol(kBytesWritten)]: 0,
      [Symbol(connect-options)]: [Object]
    },
    _header: 'GET /location-finder/v1/find-by-address HTTP/1.1\r\n' +
      'Accept: application/json, text/plain, */*\r\n' +
      'DHL-API-Key: *********************\r\n' +
      'User-Agent: axios/0.19.2\r\n' +
      'Host: api.dhl\r\n' +
      'Connection: close\r\n' +
      '\r\n',
    _onPendingData: [Function: noopPendingOutput],
    agent: Agent {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      defaultPort: 443,
      protocol: 'https:',
      options: [Object],
      requests: {},
      sockets: [Object],
      freeSockets: {},
      keepAliveMsecs: 1000,
      keepAlive: false,
      maxSockets: Infinity,
      maxFreeSockets: 256,
      maxCachedSessions: 100,
      _sessionCache: [Object],
      [Symbol(kCapture)]: false
    },
    socketPath: undefined,
    method: 'GET',
    insecureHTTPParser: undefined,
    path: '/location-finder/v1/find-by-address',
    _ended: true,
    res: IncomingMessage {
      _readableState: [ReadableState],
      readable: false,
      _events: [Object: null prototype],
      _eventsCount: 3,
      _maxListeners: undefined,
      socket: [TLSSocket],
      connection: [TLSSocket],
      httpVersionMajor: 1,
      httpVersionMinor: 1,
      httpVersion: '1.1',
      complete: true,
      headers: [Object],
      rawHeaders: [Array],
      trailers: {},
      rawTrailers: [],
      aborted: false,
      upgrade: false,
      url: '',
      method: null,
      statusCode: 400,
      statusMessage: 'Bad Request',
      client: [TLSSocket],
      _consuming: false,
      _dumped: false,
      req: [Circular],
      responseUrl: '',
      redirects: [],
      [Symbol(kCapture)]: false
    },
    aborted: false,
    timeoutCb: null,
    upgradeOrConnect: false,
    parser: null,
    maxHeadersCount: null,
    reusedSocket: false,
    _redirectable: Writable {
      _writableState: [WritableState],
      writable: true,
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _options: [Object],
      _redirectCount: 0,
      _redirects: [],
      _requestBodyLength: 0,
      _requestBodyBuffers: [],
      _onNativeResponse: [Function],
      _currentRequest: [Circular],
      _currentUrl: '',
      [Symbol(kCapture)]: false
    },
    [Symbol(kCapture)]: false,
    [Symbol(kNeedDrain)]: false,
    [Symbol(corked)]: 0,
    [Symbol(kOutHeaders)]: [Object: null prototype] {
      accept: [Array],
      'dhl-api-key': [Array],
      'user-agent': [Array],
      host: [Array]
    }
  },
  response: {**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new

    status: 400,
    statusText: 'Bad Request',
    headers: {
      date: 'Mon, 04 May 2020 09:02:52 GMT',
      'content-type': 'application/json',
      'content-length': '71',
      connection: 'close',
      'access-control-allow-origin': '*',
      'access-control-allow-headers': 'origin,x-requested-with,accept,accept-encoding,content-type,dhl-api-key',
      'access-control-max-age': '3628800',
      'access-control-allow-methods': 'GET,OPTIONS',
      'correlation-id': 'f10a4f9b-0538-4dd5-bdc0-9069f90558ad'
    },
    config: {
      url: '',
      method: 'get',
      params: [Object],
      headers: [Object],
      transformRequest: [Array],
      transformResponse: [Array],
      timeout: 0,
      adapter: [Function: httpAdapter],
      xsrfCookieName: 'XSRF-**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit newTOKEN',
      xsrfHeaderName: 'X-XSRF-TOKEN',
      maxContentLength: -1,
      validateStatus: [Function: validateStatus],
      data: undefined
    },
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
    request: ClientRequest {
      _events: [Object: null prototype],
      _eventsCount: 6,
      _maxListeners: undefined,
      outputData: [],
      outputSize: 0,
      writable: true,
      _last: true,
      chunkedEncoding: false,
      shouldKeepAlive: false,
      useChunkedEncodingByDefault: false,
      sendDate: false,
      _removedConnection: false,
      _removedContLen: false,
      _removedTE: false,
      _contentLength: 0,
      _hasBody: true,
      _trailer: '',
      finished: true,
      _headerSent: true,
      socket: [TLSSocket],
      connection: [TLSSocket],
      _header: 'GET /location-finder/v1/find-by-address HTTP/1.1\r\n' +
        'Accept: application/json, text/plain, */*\r\n' +
        'DHL-API-Key: ****************************\r\n' +
        'User-Agent: axios/0.19.2\r\n' +
        'Host: api.dhl\r\n' +
        'Connection: close\r\n' +
        '\r\n',
      _onPendingData: [Function: noopPendingOutput],
      agent: [Agent],
      socketPath: undefined,
      method: 'GET',
      insecureHTTPParser: undefined,
      path: '/location-finder/v1/find-by-address',
      _ended: true,
      res: [IncomingMessage],
      aborted: false,
      timeoutCb: null,
      upgradeOrConnect: false,
      parser: null,
      maxHeadersCount: null,
      reusedSocket: false,
      _redirectable: [Writable],
      [Symbol(kCapture)]: false,
      [Symbol(kNeedDrain)]: false,
      [Symbol(corked)]: 0,
      [Symbol(kOutHeaders)]: [Object: null prototype]
    },
    data: { error: [Object] }
  },
  isAxiosError: true,
  toJSON: [Function]


}

这是从axios版本0.19开始的重大更改。如果您想向请求添加参数，则必须通过拦截器将其传递。例如：

const axios = require('axios');
// api openexchange
const oexchange = axios.create({
  baseURL: 'https://openexchangerates/api/',
  timeout: parseInt(process.env.TIMEOUTEXTERNALREQUEST)
})
oexchange.interceptors.request.use((config) => {
  config.params = config.params || {};
  config.params.app_id = process.env.OPENEXCHANGEAPITOKEN // <-- here add the query params in your case it will be countryCode
  return config;
});

exports.cotacao = async (req, res) => {
  try {
    req.oexchange = await oexchange.get('latest.json') //here i'm calling external api with query params added in interceptor
    return res.status(200).json(req.oexchange.data)
  } catch (e) {
    res.status(500).json({errors: [{ location: 'cotacao', msg: 'Houve um erro ao acessar a api do open exchange.', param: 'openexchangerates' }]})
  }
}

这是在0.19版中添加的已知行为（2019年5月30日）当前，社区正在努力解决该问题，您可以follow here，将在0.20版中进行修复。

如果您希望使用旧的方法来传递url参数，则应向后使用版本0.18。

这里的每个代码都是有效代码，但基于axios documentation

有没有一种方法可以从api调用API以表达axios中的参数值未定义，如何从变量中添加axios中的参数

**我尝试将参数传递给我的路由，然后将该参数传递给带有URL的变量axios。如果我删除了params对象，而是将参数硬编码在url中，则请求成功。

我正在尝试发布问题，但是我的话很少，代码太多。我不知道如何解决这个问题，因此说明足以解决这个问题。我已经尽我所能解释了它。代码可以说明很多事情。谢谢。

const axios = require("axios");
dotenv.config();
const Url = "";
exports.getLocation = (req, res, next) => {
  const country = req.body.countryCode;
  axios
    .get(Url, {
      params: {
        countryCode: country}
      ,headers: {'DHL-API-Key': process.env.LOCATOR_API_KEY}})
    .then(function (response) {
      console.log(response.data);
    })
    .catch(function (error) {
      console.log(error);
    });
};```
//CODE CONSOLE LOG
**THIS IS THE CONSOLE LOG THE PARAMETER PART IS UNDEFINED HOW WILL I ADD THE PARAMETER

Error: Request failed with status code 400
    at createError (/media/ALWI/HACKERFOREVER/MyProjects/JULEYBIB_SHIPPING/server/node_modules/axios/lib/core/createError.js:16:15)
    at settle (/media/ALWI/HACKERFOREVER/MyProjects/JULEYBIB_SHIPPING/server/node_modules/axios/lib/core/settle.js:17:12)
    at IncomingMessage.handleStreamEnd (/media/ALWI/HACKERFOREVER/MyProjects/JULEYBIB_SHIPPING/server/node_modules/axios/lib/adapters/http.js:236:11)
    at IncomingMessage.emit (events.js:322:22)
    at endReadableNT (_stream_readable.js:1187:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21) {
  config: {
    url: '',
    method: 'get',
    params: { countryCode: undefined },
    headers: {
      Accept: 'application/json, text/plain, */*',
      'DHL-API-Key': '**********************',
      'User-Agent': 'axios/0.19.2'
    },
    transformRequest: [ [Function: transformRequest] ],
    transformResponse: [ [Function: transformResponse] ],
    timeout: 0,
    adapter: [Function: httpAdapter],
    xsrfCookieName: 'XSRF-TOKEN',
    xsrfHeaderName: 'X-XSRF-TOKEN',
    maxContentLength: -1,
    validateStatus: [Function: validateStatus],
    data: undefined
  },
  request: ClientRequest {
    _events: [Object: null prototype] {
      socket: [Function],
      abort: [Function],
      aborted: [Function],
      error: [Function],
      timeout: [Function],
      prefinish: [Function: requestOnPrefinish]
    },
    _eventsCount: 6,
    _maxListeners: undefined,
    outputData: [],
    outputSize: 0,
    writable: true,
    _last: true,
    chunkedEncoding: false,
    shouldKeepAlive: false,
    useChunkedEncodingByDefault: false,
    sendDate: false,
    _removedConnection: false,
    _removedContLen: false,
    _removedTE: false,
    _contentLength: 0,
    _hasBody: true,
    _trailer: '',
    finished: true,
    _headerSent: true,
    socket: TLSSocket {
      _tlsOptions: [Object],
      _secureEstablished: true,
      _securePending: false,
      _newSessionPending: false,
      _controlReleased: true,
      _SNICallback: null,
      servername: 'api.dhl',
      alpnProtocol: false,
      authorized: true,
      authorizationError: null,
      encrypted: true,
      _events: [Object: null prototype],
      _eventsCount: 9,
      connecting: false,
      _hadError: false,
      _parent: null,
      _host: 'api.dhl',
      _readableState: [ReadableState],
      readable: true,
      _maxListeners: undefined,
      _writableState: [WritableState],
      writable: false,
      allowHalfOpen: false,
      _sockname: null,
      _pendingData: null,
      _pendingEncoding: '',
      server: undefined,
      _server: null,
      ssl: [TLSWrap],
      _requestCert: true,
      _rejectUnauthorized: true,
      parser: null,
      _httpMessage: [Circular],
      [Symbol(res)]: [TLSWrap],
      [Symbol(asyncId)]: 301,
      [Symbol(kHandle)]: [TLSWrap],
      [Symbol(kSetNoDelay)]: false,
      [Symbol(lastWriteQueueSize)]: 0,
      [Symbol(timeout)]: null,
      [Symbol(kBuffer)]: null,
      [Symbol(kBufferCb)]: null,
      [Symbol(kBufferGen)]: null,
      [Symbol(kCapture)]: false,
      [Symbol(kBytesRead)]: 0,
      [Symbol(kBytesWritten)]: 0,
      [Symbol(connect-options)]: [Object]
    },

    connection: TLSSocket {
      _tlsOptions: [Object],
      _secureEstablished: true,
      _securePending: false,
      _newSessionPending: false,
      _controlReleased: true,
      _SNICallback: null,
      servername: 'api.dhl',
      alpnProtocol: false,
      authorized: true,
      authorizationError: null,
      encrypted: true,
      _events: [Object: null prototype],
      _eventsCount: 9,
      connecting: false,
      _hadError: false,
      _parent: null,
      _host: 'api.dhl',
      _readableState: [ReadableState],
      readable: true,
      _maxListeners: undefined,
      _writableState: [WritableState],
      writable: false,
      allowHalfOpen: false,
      _sockname: null,
      _pendingData: null,
      _pendingEncoding: '',
      server: undefined,
      _server: null,
      ssl: [TLSWrap],
      _requestCert: true,
      _rejectUnauthorized: true,
      parser: null,
      _httpMessage: [Circular],
      [Symbol(res)]: [TLSWrap],
      [Symbol(asyncId)]: 301,
      [Symbol(kHandle)]: [TLSWrap],
      [Symbol(kSetNoDelay)]: false,
      [Symbol(lastWriteQueueSize)]: 0,
      [Symbol(timeout)]: null,
      [Symbol(kBuffer)]: null,
      [Symbol(kBufferCb)]: null,
      [Symbol(kBufferGen)]: null,
      [Symbol(kCapture)]: false,
      [Symbol(kBytesRead)]: 0,
      [Symbol(kBytesWritten)]: 0,
      [Symbol(connect-options)]: [Object]
    },
    _header: 'GET /location-finder/v1/find-by-address HTTP/1.1\r\n' +
      'Accept: application/json, text/plain, */*\r\n' +
      'DHL-API-Key: *********************\r\n' +
      'User-Agent: axios/0.19.2\r\n' +
      'Host: api.dhl\r\n' +
      'Connection: close\r\n' +
      '\r\n',
    _onPendingData: [Function: noopPendingOutput],
    agent: Agent {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      defaultPort: 443,
      protocol: 'https:',
      options: [Object],
      requests: {},
      sockets: [Object],
      freeSockets: {},
      keepAliveMsecs: 1000,
      keepAlive: false,
      maxSockets: Infinity,
      maxFreeSockets: 256,
      maxCachedSessions: 100,
      _sessionCache: [Object],
      [Symbol(kCapture)]: false
    },
    socketPath: undefined,
    method: 'GET',
    insecureHTTPParser: undefined,
    path: '/location-finder/v1/find-by-address',
    _ended: true,
    res: IncomingMessage {
      _readableState: [ReadableState],
      readable: false,
      _events: [Object: null prototype],
      _eventsCount: 3,
      _maxListeners: undefined,
      socket: [TLSSocket],
      connection: [TLSSocket],
      httpVersionMajor: 1,
      httpVersionMinor: 1,
      httpVersion: '1.1',
      complete: true,
      headers: [Object],
      rawHeaders: [Array],
      trailers: {},
      rawTrailers: [],
      aborted: false,
      upgrade: false,
      url: '',
      method: null,
      statusCode: 400,
      statusMessage: 'Bad Request',
      client: [TLSSocket],
      _consuming: false,
      _dumped: false,
      req: [Circular],
      responseUrl: '',
      redirects: [],
      [Symbol(kCapture)]: false
    },
    aborted: false,
    timeoutCb: null,
    upgradeOrConnect: false,
    parser: null,
    maxHeadersCount: null,
    reusedSocket: false,
    _redirectable: Writable {
      _writableState: [WritableState],
      writable: true,
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _options: [Object],
      _redirectCount: 0,
      _redirects: [],
      _requestBodyLength: 0,
      _requestBodyBuffers: [],
      _onNativeResponse: [Function],
      _currentRequest: [Circular],
      _currentUrl: '',
      [Symbol(kCapture)]: false
    },
    [Symbol(kCapture)]: false,
    [Symbol(kNeedDrain)]: false,
    [Symbol(corked)]: 0,
    [Symbol(kOutHeaders)]: [Object: null prototype] {
      accept: [Array],
      'dhl-api-key': [Array],
      'user-agent': [Array],
      host: [Array]
    }
  },
  response: {**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new

    status: 400,
    statusText: 'Bad Request',
    headers: {
      date: 'Mon, 04 May 2020 09:02:52 GMT',
      'content-type': 'application/json',
      'content-length': '71',
      connection: 'close',
      'access-control-allow-origin': '*',
      'access-control-allow-headers': 'origin,x-requested-with,accept,accept-encoding,content-type,dhl-api-key',
      'access-control-max-age': '3628800',
      'access-control-allow-methods': 'GET,OPTIONS',
      'correlation-id': 'f10a4f9b-0538-4dd5-bdc0-9069f90558ad'
    },
    config: {
      url: '',
      method: 'get',
      params: [Object],
      headers: [Object],
      transformRequest: [Array],
      transformResponse: [Array],
      timeout: 0,
      adapter: [Function: httpAdapter],
      xsrfCookieName: 'XSRF-**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit newTOKEN',
      xsrfHeaderName: 'X-XSRF-TOKEN',
      maxContentLength: -1,
      validateStatus: [Function: validateStatus],
      data: undefined
    },
**I tried passing in a parameter to my route and then pass the parameter to a variable the the variable to axios with the uri the requests succeeds if i remove the params object and if i hardcode the parameter in the url help me solve the parameter problem i am abit new
    request: ClientRequest {
      _events: [Object: null prototype],
      _eventsCount: 6,
      _maxListeners: undefined,
      outputData: [],
      outputSize: 0,
      writable: true,
      _last: true,
      chunkedEncoding: false,
      shouldKeepAlive: false,
      useChunkedEncodingByDefault: false,
      sendDate: false,
      _removedConnection: false,
      _removedContLen: false,
      _removedTE: false,
      _contentLength: 0,
      _hasBody: true,
      _trailer: '',
      finished: true,
      _headerSent: true,
      socket: [TLSSocket],
      connection: [TLSSocket],
      _header: 'GET /location-finder/v1/find-by-address HTTP/1.1\r\n' +
        'Accept: application/json, text/plain, */*\r\n' +
        'DHL-API-Key: ****************************\r\n' +
        'User-Agent: axios/0.19.2\r\n' +
        'Host: api.dhl\r\n' +
        'Connection: close\r\n' +
        '\r\n',
      _onPendingData: [Function: noopPendingOutput],
      agent: [Agent],
      socketPath: undefined,
      method: 'GET',
      insecureHTTPParser: undefined,
      path: '/location-finder/v1/find-by-address',
      _ended: true,
      res: [IncomingMessage],
      aborted: false,
      timeoutCb: null,
      upgradeOrConnect: false,
      parser: null,
      maxHeadersCount: null,
      reusedSocket: false,
      _redirectable: [Writable],
      [Symbol(kCapture)]: false,
      [Symbol(kNeedDrain)]: false,
      [Symbol(corked)]: 0,
      [Symbol(kOutHeaders)]: [Object: null prototype]
    },
    data: { error: [Object] }
  },
  isAxiosError: true,
  toJSON: [Function]


}

这是从axios版本0.19开始的重大更改。如果您想向请求添加参数，则必须通过拦截器将其传递。例如：

const axios = require('axios');
// api openexchange
const oexchange = axios.create({
  baseURL: 'https://openexchangerates/api/',
  timeout: parseInt(process.env.TIMEOUTEXTERNALREQUEST)
})
oexchange.interceptors.request.use((config) => {
  config.params = config.params || {};
  config.params.app_id = process.env.OPENEXCHANGEAPITOKEN // <-- here add the query params in your case it will be countryCode
  return config;
});

exports.cotacao = async (req, res) => {
  try {
    req.oexchange = await oexchange.get('latest.json') //here i'm calling external api with query params added in interceptor
    return res.status(200).json(req.oexchange.data)
  } catch (e) {
    res.status(500).json({errors: [{ location: 'cotacao', msg: 'Houve um erro ao acessar a api do open exchange.', param: 'openexchangerates' }]})
  }
}

这是在0.19版中添加的已知行为（2019年5月30日）当前，社区正在努力解决该问题，您可以follow here，将在0.20版中进行修复。

如果您希望使用旧的方法来传递url参数，则应向后使用版本0.18。

这里的每个代码都是有效代码，但基于axios documentation