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我有一箇中間件，可以在下一個動作運行前轉到刷新令牌，然後在訪問令牌到期時運行其他動作。REDX刷新令牌中間件
但是，如果我一次發出多個請求並且訪問令牌結束，我正在嘗試獲取儘可能多的刷新令牌。我正在檢查狀態中的isLoading屬性以防止這種情況。但是在請求之後，reducer中的isLoading值是真的，它在中間件中似乎是錯誤的，所以它一次又一次地請求。
我在fetching_refresh_token動作中發送refreshTokenPromise，但我從來沒有得到state.refreshTokenPromise，它總是未定義的。
我絕對有問題的狀態。
所以，這裏是我的問題，我怎樣才能訪問中間件的變化狀態值？
刷新令牌中間件：（這個版本打端點多次）
import { AsyncStorage } from 'react-native';
import { MIN_TOKEN_LIFESPAN } from 'react-native-dotenv';
import moment from 'moment';
import Api from '../lib/api';
import {
FETCHING_REFRESH_TOKEN,
FETCHING_REFRESH_TOKEN_SUCCESS,
FETCHING_REFRESH_TOKEN_FAILURE } from '../actions/constants';
export default function tokenMiddleware({ dispatch, getState }) {
return next => async (action) => {
if (typeof action === 'function') {
const state = getState();
if (state) {
const expiresIn = await AsyncStorage.getItem('EXPIRES_IN');
if (expiresIn && isExpired(JSON.parse(expiresIn))) {
if (!state.refreshToken.isLoading) {
return refreshToken(dispatch).then(() => next(action));
}
return state.refreshTokenPromise.then(() => next(action));
}
}
}
return next(action);
};
}
async function refreshToken(dispatch) {
const clientId = await AsyncStorage.getItem('CLIENT_ID');
const clientSecret = await AsyncStorage.getItem('CLIENT_SECRET');
const refreshToken1 = await AsyncStorage.getItem('REFRESH_TOKEN');
const userObject = {
grant_type: 'refresh_token',
client_id: JSON.parse(clientId),
client_secret: JSON.parse(clientSecret),
refresh_token: refreshToken1,
};
const userParams = Object.keys(userObject).map(key => encodeURIComponent(key) + '=' + encodeURIComponent(userObject[key])).join('&');
const refreshTokenPromise = Api.post('/token', userParams).then(async (res) => {
await AsyncStorage.setItem('ACCESS_TOKEN', res.access_token);
await AsyncStorage.setItem('REFRESH_TOKEN', res.refresh_token);
await AsyncStorage.setItem('EXPIRES_IN', JSON.stringify(res['.expires']));
dispatch({
type: FETCHING_REFRESH_TOKEN_SUCCESS,
data: res,
});
return res ? Promise.resolve(res) : Promise.reject({
message: 'could not refresh token',
});
}).catch((err) => {
dispatch({
type: FETCHING_REFRESH_TOKEN_FAILURE,
});
throw err;
});
dispatch({
type: FETCHING_REFRESH_TOKEN,
refreshTokenPromise,
});
return refreshTokenPromise;
}
function isExpired(expiresIn) {
return moment(expiresIn).diff(moment(), 'seconds') < MIN_TOKEN_LIFESPAN;
}
刷新令牌減速機：
import {
FETCHING_REFRESH_TOKEN,
FETCHING_REFRESH_TOKEN_SUCCESS,
FETCHING_REFRESH_TOKEN_FAILURE } from '../actions/constants';
const initialState = {
token: [],
isLoading: false,
error: false,
};
export default function refreshTokenReducer(state = initialState, action) {
switch (action.type) {
case FETCHING_REFRESH_TOKEN:
return {
...state,
token: [],
isLoading: true,
};
case FETCHING_REFRESH_TOKEN_SUCCESS:
return {
...state,
isLoading: false,
token: action.data,
};
case FETCHING_REFRESH_TOKEN_FAILURE:
return {
...state,
isLoading: false,
error: true,
};
default:
return state;
}
}
在此期間，當我把它發送到的getState到refreshToken功能，我得到了refreshToken中改變的狀態值。但是在這個版本中，刷新標記不經刷新而轉到其他操作。
猴補丁版本：（該版本不僅使1個請求）
import { AsyncStorage } from 'react-native';
import { MIN_TOKEN_LIFESPAN } from 'react-native-dotenv';
import moment from 'moment';
import Api from '../lib/api';
import {
FETCHING_REFRESH_TOKEN,
FETCHING_REFRESH_TOKEN_SUCCESS,
FETCHING_REFRESH_TOKEN_FAILURE } from '../actions/constants';
export default function tokenMiddleware({ dispatch, getState }) {
return next => async (action) => {
if (typeof action === 'function') {
const state = getState();
if (state) {
const expiresIn = await AsyncStorage.getItem('EXPIRES_IN');
if (expiresIn && isExpired(JSON.parse(expiresIn))) {
if (!state.refreshTokenPromise) {
return refreshToken(dispatch, getState).then(() => next(action));
}
return state.refreshTokenPromise.then(() => next(action));
}
}
}
return next(action);
};
}
async function refreshToken(dispatch, getState) {
const clientId = await AsyncStorage.getItem('CLIENT_ID');
const clientSecret = await AsyncStorage.getItem('CLIENT_SECRET');
const refreshToken1 = await AsyncStorage.getItem('REFRESH_TOKEN');
const userObject = {
grant_type: 'refresh_token',
client_id: JSON.parse(clientId),
client_secret: JSON.parse(clientSecret),
refresh_token: refreshToken1,
};
if (!getState().refreshToken.isLoading) {
const userParams = Object.keys(userObject).map(key => encodeURIComponent(key) + '=' + encodeURIComponent(userObject[key])).join('&');
const refreshTokenPromise = Api.post('/token', userParams).then(async (res) => {
await AsyncStorage.setItem('ACCESS_TOKEN', res.access_token);
await AsyncStorage.setItem('REFRESH_TOKEN', res.refresh_token);
await AsyncStorage.setItem('EXPIRES_IN', JSON.stringify(res['.expires']));
dispatch({
type: FETCHING_REFRESH_TOKEN_SUCCESS,
data: res,
});
return res ? Promise.resolve(res) : Promise.reject({
message: 'could not refresh token',
});
}).catch((err) => {
dispatch({
type: FETCHING_REFRESH_TOKEN_FAILURE,
});
throw err;
});
dispatch({
type: FETCHING_REFRESH_TOKEN,
refreshTokenPromise,
});
return refreshTokenPromise;
}
}
function isExpired(expiresIn) {
return moment(expiresIn).diff(moment(), 'seconds') < MIN_TOKEN_LIFESPAN;
}
謝謝。
我沒有看到你在哪裏檢查isLoading價值在中間件.. – Freez
我試過其他的東西，修復它，你會再看看？ – ccoeder
當然！我好奇 – Freez