私有路由jsx在react JS

Question

问题:我试图通过isAuth()助手验证用户，但它表现得很奇怪。我希望它寻找访问令牌，如果有的话，或者从后端调用访问令牌，如果刷新令牌可用，虽然它工作完美并设置访问令牌cookie，但问题是如果从PrivateRoutes.jsx调用，它根本看不到令牌，并将用户发送到登录页面。

为refs添加所需代码:

isAuth ():

export const isAuth = () => {
if (window !== undefined) {
const accessCookieChecked = getCookie("_mar_accounts_at");
const refreshCookieChecked = getCookie("_mar_accounts_rt");
if (accessCookieChecked) {
return true;
} else if (refreshCookieChecked) {
console.log(refreshCookieChecked);
axios({
method: "POST",
url: `${API_URL}/api/token`,
data: { refresh_token: refreshCookieChecked },
}).then((res) => {
console.log(res);
setCookie("_mar_accounts_at", res.data.accessToken);
return true;
});
} else {
return false;
}
} else {
return false;
}
};

PrivateRoutes.jsx

import React from "react";
import { Route, Redirect } from "react-router-dom";
import { isAuth } from "../helpers/auth";
const PrivateRoute = ({ component: Component, ...rest }) => (
<Route
{...rest}
render={(props) =>
isAuth() ? (
<Component {...props} />
) : (
<Redirect
to={{ pathname: "/login", state: { from: props.location } }}
/>
)
}
></Route>
);
export default PrivateRoute;

有人能看看这个吗?和帮助!

Answer 1

您很可能遇到异步问题，当您在axios中进行调用时，回调中的return true;从未实际返回到PrivateRoute中的函数调用。相反，你需要使用Promise/setState/useEffect:

export const isAuth = () => {
if (window === undefined) {
return Promise.resolve(false);
} else {
const accessCookieChecked = getCookie("_mar_accounts_at");
const refreshCookieChecked = getCookie("_mar_accounts_rt");
if (accessCookieChecked) {
return Promise.resolve(true);
} else if (refreshCookieChecked) {
console.log(refreshCookieChecked);
return new Promise(resolve => {
axios({
method: "POST",
url: `${API_URL}/api/token`,
data: { refresh_token: refreshCookieChecked },
}).then((res) => {
console.log(res);
setCookie("_mar_accounts_at", res.data.accessToken);
resolve(true);
});
})

} else {
return Promise.resolve(false);
}
}
};

import React, { useState, useEffect } from 'react';
import { Route, Redirect } from 'react-router-dom';
import { isAuth } from '../helpers/auth';
const PrivateRoute = ({ component: Component, ...rest }) => {
const [isAuthTrue, setIsAuthTrue] = useState();
const [loading, setLoading] = useState(true);
useEffect(() => {
isAuth().then(res => {
setIsAuthTrue(res);
setLoading(false);
})
})
return (
<>
{loading ? (
<div>some loading state</div>
) : (
<Route
{...rest}
render={(props) =>
isAuthTrue ? (
<Component {...props} />
) : (
<Redirect
to={{ pathname: '/login', state: { from: props.location } }}
/>
)
}
/>
)}
</>
);
};
export default PrivateRoute;