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Axios response interceptor for access token refresh supporting 1 to N async requests
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let isAlreadyFetchingAccessToken = false | |
let subscribers = [] | |
function onAccessTokenFetched(access_token) { | |
subscribers = subscribers.filter(callback => callback(access_token)) | |
} | |
function addSubscriber(callback) { | |
subscribers.push(callback) | |
} | |
axios.interceptors.response.use(function (response) { | |
return response | |
}, function (error) { | |
const { config, response: { status } } = error | |
const originalRequest = config | |
if (status === 401) { | |
if (!isAlreadyFetchingAccessToken) { | |
isAlreadyFetchingAccessToken = true | |
store.dispatch(fetchAccessToken()).then((access_token) => { | |
isAlreadyFetchingAccessToken = false | |
onAccessTokenFetched(access_token) | |
}) | |
} | |
const retryOriginalRequest = new Promise((resolve) => { | |
addSubscriber(access_token => { | |
originalRequest.headers.Authorization = 'Bearer ' + access_token | |
resolve(axios(originalRequest)) | |
}) | |
}) | |
return retryOriginalRequest | |
} | |
return Promise.reject(error) | |
}) |
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