vue拦截器刷新登陆页面_vue下axios拦截器token刷新版机制的实例代码
//创建http.js文件，以下是详细代码：
//引入安装的axios插件
import axios from 'axios'
import router from '@/router';
import Vue from 'vue'
const qs = require("qs");
let _this = new Vue();
let isLock = false;
let refreshSubscribers = [];
//判断token是否过期
function isTokenExpired(token) {
let expires_time = JSON.parse(token).expires_time;
let curentTime = new Date().getTime();
if (curentTime >= expires_time) {
return true;
} else {
return false;
}
}
//获取Token对象
function getToken() {
return localStorage.getItem("token");
}
//push所有请求到数组中
function subscribeTokenRefresh(cb) {
refreshSubscribers.push(cb)
}
//刷新版请求(refreshSubscribers数组中的请求得到新版的token之后会自执行，用新版的token去请求数据)
function onRrefreshed(token) {
refreshSubscribers.map(cb => cb(token))
}
//刷新版token
function refreshToken(config, token, resolve, reject) {
let data = { refresh_token: JSON.parse(token).refresh_token };
axios({
method: "post",
url: "xxxxxx/refreshToken",//刷新版token的接口
headers: {
"Content-Type": "application/x-www-form-urlencoded",
"Authorization": "Basic b3JkZXItc2VydmVyOjEyMzQ1Ng=="
},
data: qs.stringify(data)
}).then(res => {
isLock = false;//释放锁
if (res.data.code === 101) {
_this.$message.error('登陆状态已失效，请重新版登陆。');
localStorage.removeItem("token");
router.push({
path: "/login"
});
return;
}
let expires_time = new Date().getTime() + parseInt(res.data.data.expires_in * 0.8) * 1000;
let token = JSON.parse(localStorage.getItem("token"));
token.expires_time = expires_time;
token.access_token = res.data.data.access_token;
localStorage.setItem("token", JSON.stringify(token));
config.headers.Authorization = 'Bearer ' + res.data.data.access_token;
resolve(config);
//执行数组里的函数,重新版发起被挂起的请求
onRrefreshed(res.data.data.access_token)
//清空数组中保存的请求
refreshSubscribers = []
}).catch(err => {
return err;
});
}
function request(newOptions, resolve, reject) {
axios({
method: newOptions.method,
url: newOptions.url,
data: newOptions.type == "form" ? qs.stringify(newOptions.data) : newOptions.data,
headers: newOptions.headers
}).then(res => {
if (res.status == 200) {
//这里我们只需要获取返回的data中的数据就行了
resolve(res.data);
} else {
reject(res.data);
}
}).catch(err => {
reject(err);
_this.$message.error('服务异常！');
})
}
axios.interceptors.request.use(
config => {
let token = getToken();
if (token) {
//判断token是否过期,如果过期请求刷新版token
if (isTokenExpired(token)) {
//判断当前是否正在请求刷新版token
if (!isLock) {
isLock = true;//isLock设置true,锁住防止死循环。
//使用Promise等待刷新版完成返回配置信息
let refresh = new Promise((resolve, reject) => {
refreshToken(config, token, resolve, reject);
})
return refresh;
} else {
//判断当前url是否是刷新版token的请求地址，如果是直接下一步。
if (config.url.indexOf('/logined/refreshToken') === -1) {
//把请求(token)=>{....}都push到一个数组中
let retry = new Promise((resolve, reject) => {
//(token) => {...}这个函数就是回调函数
subscribeTokenRefresh((token) => {
config.headers.Authorization = 'Bearer ' + token
//将请求挂起
resolve(config)
})
})
return retry
} else {
return config;
}
}
} else {
return config;
}
} else {
return config;
}
}, error => {
return Promise.reject(error);
});
const http = options => {
return new Promise((resolve, reject) => {
const defaultOptions = {
type: "json"
};
const newOptions = {
...defaultOptions,
...options
};
//headers默认传递json格式数据，这里也可以设置token，每次调用都会携带
if (localStorage.getItem("token")) {
newOptions.headers = {
// 'Authorization': 'Basic b3JkZXItc2VydmVyOjEyMzQ1Ng==',
'content-Type': newOptions.type == 'form' ? 'application/x-www-form-urlencoded;charset=UTF-8' : 'application/json;charset=UTF-8',
'Authorization': 'Bearer ' + JSON.parse(localStorage.getItem("token")).access_token,
...newOptions.headers
};
} else {
newOptions.headers = {
'content-Type': newOptions.type == 'form' ? 'application/x-www-form-urlencoded;charset=UTF-8' : 'application/json;charset=UTF-8',
...newOptions.headers
};
}
request(newOptions, resolve, reject);
})
};
//设置请求超时
axios.defaults.timeout = 30000
export default http
//在main.js下面挂载 http.js文件
import http from '@/utils/http.js';
Vue.prototype.http = http;
//登陆保存token信息接口
this.http({
method: "post",
url: "/xxxxx/user",
type: "form",
headers: { Authorization:"Basicb3JkZXItc2VydmVyOjEyMzQ1Ng==" },
data: {}
}).then(function(res) {
let expires_time =
new Date().getTime() +
parseInt(res.data.token.expires_in * 0.8) * 1000;
let token = res.data.token;
token.expires_time = expires_time;
localStorage.setItem("token", JSON.stringify(token));
}).catch(function(err) {
console.log(err);
});
//退出清空token
this.http({
method: "get",
url: "/xxxxx/logout",
data: {}
}).then(function(res) {
localStorage.removeItem("token");
}).catch(function(err) {
console.log(err);
});
总结
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