Vue注册模块与登录状态

时间:2022-09-29 芜湖男童人气:0

整体框架

1. 前端页面授权

当我们登录网站的时候，如果没有登录，强制让用户重定向到登录界面

在 router 目录下的 index.js 文件下实现。 router -> index.js

import store from '../store/index'
// 把一些额外信息放到一个额外的域里面，meta信息里面存一下是否要授权，如果需要授权而且没有登录，重定向到登录页面，重定向到登录界面。
const routes = [
  {
    path: "/",
    name: "home",
    redirect: "/pk/",
    meta: {
      requestAuth: true,
    }
  },
  {
    path: "/pk/",
    name: "pk_index",
    component: PkIndexView,
    meta: {
      requestAuth: true,
    }
  },
  {
    path: "/record/",
    name: "record_index",
    component: RecordIndexView,
    meta: {
      requestAuth: true,
    }
  },
  {
    path: "/ranklist/",
    name: "ranklist_index",
    component: RanklistIndexView,
    meta: {
      requestAuth: true,
    }
  },
  {
    path: "/user/bot/",
    name: "user_bot_index",
    component: UserBotIndexView,
    meta: {
      requestAuth: true,
    }
  },
  {
    path: "/user/account/login",
    name: "user_account_login",
    component: UserAccountLoginView,
    meta: {
      requestAuth: false,
    }
  },
  {
    path: "/user/account/register",
    name: "user_account_register",
    component: UserAccountRegisterView,
    meta: {
      requestAuth: false,
    }
  },
  {
    path: "/404/",
    name: "404",
    component: NotFound,
    meta: {
      requestAuth: false,
    }
  },
  {
    path: "/:catchAll(.*)",
    redirect: "/404/",
  }
]
// to跳转到哪个页面， from表示从哪个页面跳转过去
// next的表示将页面要不要执行下一步操作，写之前首先要记录每一个未授权界面
router.beforeEach((to, from, next) => {
  if (to.meta.requestAuth && !store.state.user.is_login) {
    next({name: "user_account_login"})；
  } else {
    next();
  }
})

最终实现效果：如果处于未登录状态，点击除注册之外的按钮页面会跳转到登录界面。

2. 实现注册页面

在 view -> user -> account 下的 UserAccountRegisterView.vue 文件实现，实现方式类似于同目录下的 UserAccountLoginView.vue

可以直接把登录页面的样式复制过来再做修改。

<template>
    <ContentField>
        <div class="row justify-content-md-center">
            <div class="col-3">
                <form @submit.prevent="register">
                    <div class="mb-3">
                        <label for="username" class="form-label">用户名</label>
                        <input v-model="username" type="text" class="form-control" id="username" placeholder="请输入用户名">
                    </div>
                    <div class="mb-3">
                        <label for="password" class="form-label">密码</label>
                        <input v-model="password" type="password" class="form-control" id="password" placeholder="请输入密码">
                    </div>
                    <div class="mb-3">
                        <label for="confirmedpassword" class="form-label">密码</label>
                        <input v-model="confirmedpassword" type="password" class="form-control" id="confirmedpassword" placeholder="请再次输入密码">
                    </div>
                    <div class="error-message">{{ error_message }}</div>
                    <button type="submit" class="btn btn-primary">提交</button>
                </form>
            </div>
        </div>
    </ContentField>
</template>
<script>
import ContentField from '../../../components/ContentField.vue'
import { ref } from 'vue'
import router from '../../../router/index'
import $ from 'jquery'
export default {
    components: {
        ContentField
    },
    setup() {
        let username = ref('');
        let password = ref('');
        let confirmedPassword = ref('');
        let error_message = ref('');
        const register = () => {
            $.ajax({
                url: "http://127.0.0.1:8080/user/account/register/",
                type: "post",
                data: {
                    username: username.value,
                    password: password.value,
                    confirmedPassword: confirmedPassword.value,
                },
                success(resp) {
                    // 成功直接返回登录界面
                    if (resp.error_message === "success") {
                        router.push({name: "user_account_login"});
                    } else {
                        error_message.value = resp.error_message;
                    }
                },
              });
        }
        return {
            username,
            password,
            confirmedPassword,
            error_message,
            register,
        }
    }
}
</script>
<style scoped>
button {
    width: 100%;
}
div.error-message {
    color: red;
    justify-content: center;
}
</style>

实现效果图：

在测试的时候可以会遇到不输入密码也可以注册成功的 bug，在 RegisterServiceImpl.java 下修改一下就可以了。

3. 实现登录状态的持久化

当我们的用户重定向到登陆页面的时候，我们需要把用户的 token 存储到浏览器的 local storage，这样就可以实现登录状态持久化。

首先修改 store 目录下的 -> user.js 文件，在合适的位置添加下列两行。

localStorage.setItem("jwt_token", resp.token);
localStorage.removeItem("jwt_token");

其次修改 view -> user -> account 下的 UserAccountLoginView.vue 文件

<script>
import ContentField from '../../../components/ContentField.vue'
import { useStore } from 'vuex'
import { ref } from 'vue'
import router from '../../../router/index'
export default {
    components: {
        ContentField
    },
    setup() {
        const store = useStore();
        let username = ref('');
        let password = ref('');
        let error_message = ref('');
        const jwt_token = localStorage.getItem("jwt_token");
        if (jwt_token) {
            store.commit("updateToken", jwt_token);
            store.dispatch("getinfo", {
                success() {
                    router.push({ name: "home" });
                },
                error() {
                }
            })
        }else {
        }
        const login = () => {
            error_message.value = "";
            store.dispatch("login", {
                username: username.value,
                password: password.value,
                success() {
                    store.dispatch("getinfo", {
                        success() {
                            router.push({ name: 'home' });
                            console.log(store.state.user);
                        }
                    })
                },
                error() {
                    error_message.value = "用户名或密码错误";
                }
            })
        }
        return {
            username,
            password,
            error_message,
            login,
        }
    }
}
</script>

优化前端

在实现前端登录状态持久化之后，刷新页面可能会存在明显的转换，所以下面对前端页面进行优化。

首先在 store 目录下的 user.js 中添加全局变量和下拉函数。

state: {
        id: "",
        username: "",
        password: "",
        photo: "",
        token: "",
        is_login: false,
        pulling_info: true, //是否正在拉取信息
    },
 mutations: {
        updateUser(state, user) {
            state.id = user.id;
            state.username = user.username;
            state.photo = user.photo;
            state.is_login = user.is_login;
        },
        updateToken(state, token) {
            state.token = token;
        },
        logout(state) {
            state.id = "";
            state.username = "";
            state.photo = "";
            state.token = "";
            state.is_login = false;
        },
        updatePullingInfo(state, pulling_info) {
            state.pulling_info = pulling_info;
        }
    },

其次修改 UserAccountLoginView.vue

<template>
    <ContentField v-if="!$store.state.user.pulling_info">
        <div class="row justify-content-md-center">
            <div class="col-3">
                <form @submit.prevent="login">
                    <div class="mb-3">
                        <label for="username" class="form-label">用户名</label>
                        <input v-model="username" type="text" class="form-control" id="username" placeholder="请输入用户名">
                    </div>
                    <div class="mb-3">
                        <label for="password" class="form-label">密码</label>
                        <input v-model="password" type="password" class="form-control" id="password" placeholder="请输入密码">
                    </div>
                    <div class="error-message">{{ error_message }}</div>
                    <button type="submit" class="btn btn-primary">提交</button>
                </form>
            </div>
        </div>
    </ContentField>
</template>
<script>
setup() {
        const store = useStore();
        let username = ref('');
        let password = ref('');
        let error_message = ref('');
        const jwt_token = localStorage.getItem("jwt_token");
        if (jwt_token) {
            store.commit("updateToken", jwt_token);
            store.dispatch("getinfo", {
                success() {
                    router.push({ name: "home" });
                    store.commit("updatePullingInfo", false);
                },
                error() {
                    store.commit("updatePullingInfo", false);
                }
            })
        }else {
            store.commit("updatePullingInfo", false);
        }
}
</script>

最后还需要修改 NavBar.vue。

<ul class="navbar-nav" v-else-if="!$store.state.user.pulling_info">
  <li class="nav-item">
    <router-link class="nav-link" :to="{name: 'user_account_login' }" role="button">
      登录
    </router-link>
  </li>
  <li class="nav-item">
    <router-link class="nav-link" :to="{name: 'user_account_register'}" role="button">
      注册
    </router-link>
  </li>
</ul>

代码地址

king of bots

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