有没有一种方法可以从一个API调用API来表达axios中的参数值是不确定的，我如何从一个变量在axios中添加参数

Question

**我尝试将一个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params对象并在url中硬编码参数，则请求成功。

我试图发布这个问题，但我的话很少，代码太多了。我不知道如何解决这个问题，所以这个解释就足以解决这个问题。我已经尽力解释了。代码本身就说明了很多问题。非常感谢。

const axios = require("axios");
dotenv.config();
const Url = "https://api.dhl.com/location-finder/v1/find-by-address";
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: 'https://api.dhl.com/location-finder/v1/find-by-address',
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.com',
alpnProtocol: false,
authorized: true,
authorizationError: null,
encrypted: true,
_events: [Object: null prototype],
_eventsCount: 9,
connecting: false,
_hadError: false,
_parent: null,
_host: 'api.dhl.com',
_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.com',
alpnProtocol: false,
authorized: true,
authorizationError: null,
encrypted: true,
_events: [Object: null prototype],
_eventsCount: 9,
connecting: false,
_hadError: false,
_parent: null,
_host: 'api.dhl.com',
_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/1.1rn' +
'Accept: application/json, text/plain, */*rn' +
'DHL-API-Key: *********************rn' +
'User-Agent: axios/0.19.2rn' +
'Host: api.dhl.comrn' +
'Connection: closern' +
'rn',
_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: 'https://api.dhl.com/location-finder/v1/find-by-address',
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: 'https://api.dhl.com/location-finder/v1/find-by-address',
[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: 'https://api.dhl.com/location-finder/v1/find-by-address',
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/1.1rn' +
'Accept: application/json, text/plain, */*rn' +
'DHL-API-Key: ****************************rn' +
'User-Agent: axios/0.19.2rn' +
'Host: api.dhl.comrn' +
'Connection: closern' +
'rn',
_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]

}

Answer 1

这是axios 0.19版本的突破性更改。如果您想向请求添加一个参数，则必须通过一个拦截器来传递它。例如：

const axios = require('axios');
// api openexchange
const oexchange = axios.create({
baseURL: 'https://openexchangerates.org/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0.19版本中添加的已知行为(2019年5月30日(目前，社区正在努力修复这种行为，您可以在这里遵循，它将在0.20版中修复。

如果你想用旧的方式传递url参数，你应该向后使用0.18版本。

这里的每个代码都基于axios文档