1.首先,点击登录按钮，触发handleLogin方法，通过 this.$store.dispatch(“user/login”, this.loginForm)调用vuex中login方法，此处user/login表示的是调用user文件下的login方法
handleLogin() {
this.$refs.loginForm.validate((valid) => {
if (valid) {
this.loading = true;
this.$store
.dispatch("user/login", this.loginForm)
.then((v) => {
this.$router.push({
path: this.redirect || "/dashboard",
query: this.otherQuery,
});
// this.loading = false;
})
.catch((e) => {
// console.log(e);
this.loading = false;
if (e.response) {
this.$message.closeAll();
this.$message.warning("账号或者密码输入有误");
}
});
} else {
this.loading = false;
console.log("error submit!!");
return false;
}
});
},
2.追踪到user文件下的login方法，开始登录，在login方法中commit mutation中的SET_TOKEN,把后端返回的sessionId作为参数传入。接下来看下mutation的SET_TOKEN
login({ commit }, userInfo) {
const { username, password, tenant } = userInfo;
return new Promise((resolve, reject) => {
login({ username: username.trim(), password, tenant })
.then(response => {
console.log(response,'login-res');
commit("SET_TOKEN", response.sessionId);
setToken(response.sessionId);//把sessionId存入cookie，每次请求都要携带
// Cookies.set("Authorization", "Bearer " + response.access_token);
resolve();
})
.catch(error => {
// console.log(error);
reject(error);
});
});
},
export function setToken(token) {
return Cookies.set(TokenKey, token)
}
3.追踪到mutation下的SET_TOKEN,把传入的sessionId保存到state
SET_TOKEN: (state, token) => {
state.token = token
},
4.登录成功后，跳转到首页，路由跳转需要通过路由守卫判断是否登录，逻辑为
检查是否有token
1.1若有，则判断跳转的路由是否是登录页面
1.1.1若是，直接放行
1.1.2若不是，判断vuex里是否保存了当前账号的角色
1.1.2.1若有，直接放行
1.1.2.2若没有，则分别调用getUserInfo()、getInfo()、generateRoutes分别获取当 前账号的用户信息，角色信息，菜单数据等，并存入vuex
1.2若没有，强制跳转到登录页面
router.beforeEach(async(to, from, next) => {
// start progress bar
NProgress.start()
// set page title
document.title = getPageTitle(to.meta.title)
// determine whether the user has logged in
const hasToken = getToken()//获取token
//判断是否有token
if (hasToken) {
//若有，则判断是否跳转到登录
if (to.path === ‘/login’) {//若是跳转到登录，直接放行
// if is logged in, redirect to the home page
next({ path: ‘/’ })
NProgress.done() // hack: https://github.com/PanJiaChen/vue-element-admin/pull/2939
} else {//若不是跳转到登录，则需要判断当前账号的角色
// determine whether the user has obtained his permission roles through getInfo
const hasRoles = store.getters.roles && store.getters.roles.length > 0
console.log(store.getters.roles)
if (hasRoles) {//若vuex里已经保存了当前帐号的角色信息（所以在角色权限页面中保存了角色信息后，并没有把角色信息存入vuex，需要重新登录）
next()//直接放行
} else {//若vuex没有当前账号的角色信息
try {
// get info
// note: roles must be a object array! such as: [‘admin’] or ,[‘developer’,‘editor’]
const roles = await store.dispatch(‘user/getInfo’)//获取角色信息
//get userInfo
const userInfo = await store.dispatch('user/getuserInfo');//获取用户信息（用户名，电话等信息）
// generate accessible routes map based on roles
const accessRoutes = await store.dispatch('permission/generateRoutes', roles)//获取页面菜单信息
// dynamically add accessible routes
router.addRoutes(accessRoutes)//动态添加路由
// hack method to ensure that addRoutes is complete
// set the replace: true, so the navigation will not leave a history record
next({ ...to, replace: true })
} catch (error) {
// remove token and go to login page to re-login
await store.dispatch('user/resetToken')
Message.error(error || 'Has Error')
next(`/login`)
NProgress.done()
}
}
}
} else {//没有token的话强制跳到登录页面
/* has no token*/
if (whiteList.indexOf(to.path) !== -1) {
// in the free login whitelist, go directly
next()
} else {
// other pages that do not have permission to access are redirected to the login page.
next(/login)
// ?redirect=${to.path}
NProgress.done()
}
}
})
同理，退出登录的时候需要在state以及cookie中移除token
