使用 Abp.Zero 搭建第三方登录模块(三):网页端开发

简短回顾一下网页端的流程,总的来说网页端的职责有三:
  1. 生成一个随机字符作为鉴权会话的临时Token,
  2. 生成一个小程序码, Token作为参数固化于小程序码当中
  3. 监控整个鉴权过程状态,一旦状态变为AUTHORIZED(已授权)则获取小程序登录凭证code。调用ExternalAuthenticate完成登录。

必威体育app官方版下载上一章,我们介绍了服务端的开发,这次我们需要调用GetACode,GetToken,分别获取小程序码,和获取当前状态

首先使用vue-cli创建一个web项目,命名为mp-auth

vue create mp-auth

必威体育app官方版下载新建ajaxRequest.ts,创建request对象,这一对象将利用axios库发送带有访问凭证的Header的请求

这里使用js-cookie库获取cookie中的访问凭证,并添加到Header中 

import Cookies from "js-cookie";
import axios, {  CancelTokenSource } from 'axios'
//发送网络请求
const tokenKey = "main_token";
const getToken = () => Cookies.get(tokenKey);

export const request = async (url: string, methods, data: any, onProgress?: (e) => void, cancelToken?: CancelTokenSource) => {
    let token = null
    let timeout = 3000;
    if (cancelToken) {
        token = cancelToken.token
        timeout = 0;
    }

    const service = axios.create()
    service.interceptors.request.use(
        (config) => {
            const token = getToken();
            // Add X-Access-Token header to every request, you can add other custom headers here
            if (token) {
                config.headers['X-XSRF-TOKEN'] = token
                config.headers['Authorization'] = 'Bearer ' + token
            }
            return config
        },
        (error) => {
            Promise.reject(error)
        }
    )

    const re = await service.request({
        url: url,
        method: methods,
        data: data,
        cancelToken: token,
        timeout: timeout,
        onUploadProgress: function (progressEvent) { //原生获取上传进度的事件
            if (progressEvent.lengthComputable) {
                if (onProgress) {
                    onProgress(progressEvent);
                }
            }
        },
    })
    return re as any;
}

///获得取消令牌
export const getCancelToken = () => {
    const source = axios.CancelToken.source();
    return source;
}

回到App.vue

必威体育app官方版下载我们按照网页端这个三个职责的顺序,分步骤完成代码

生成Token

首先建立两个变量,存储当前的Token和状态枚举值

export default {
  name: "App",
  data: () => {
    return {
      wechatMiniappLoginToken: null,
      wechatMiniappLoginStatus: "WAIT",
    };
  },

methods中建立getToken函数,这里使用8位随机数作为token值

  methods: {
    getToken() {
      if (this.wechatMiniappLoginToken == null) {
        var date = new Date();
        var token = `${(Math.random() * 100000000)
          .toFixed(0)
          .toString()
          .padEnd(8, "0")}`;
        this.wechatMiniappLoginToken = token;
      }
      return this.wechatMiniappLoginToken;
    }
   }

生成小程序码

必威体育app官方版下载Html部分,插入一个图片,将token传入scene参数

<img :src="`${prefix}/MiniProgram/GetACode?scene=${getToken()}&page=${miniappPage}&mode=content`"/>

必威体育app官方版下载Prefix是你的服务地址前缀

prefix: "http://localhost:44311/api/services/app"

page为小程序中鉴权页面的路径,需注意的是在小程序未发布时无法跳转至页面,报错41030,若要使用扫码来跳转指定页面,小程序需要先发布

miniappPage: "pages/login/index"

监控整个鉴权过程状态

首先需要一个函数,根据当前的Token获取当前鉴权状态,并且不断循环这一操作,这里编写start函数,并以每1秒钟轮询状态,代码如下:

   start() {
      clearInterval(this.timerId);
      this.timerId = setInterval(async () => {
        if (!this.loading) {
          this.loading = true;

          await request(
            `${this.prefix}/MiniProgram/GetToken?token=${this.wechatMiniappLoginToken}`,
            "get",
            null
          )            
        }
      }, 1000);
    },

在页面开始函数代码Created中调用这一函数

  created: function () {
    this.start();
  },

接下来处理轮询结果,如果没有拿到值,说明Token已过期,wechatMiniappLoginStatus状态为"EXPIRED"

          await request(
            `${this.prefix}/MiniProgram/GetToken?token=${this.wechatMiniappLoginToken}`,
            "get",
            null
          )
            .then(async (re) => {
              if (re.data.result == null) {
                this.wechatMiniappLoginStatus = "EXPIRED";
                this.wechatMiniappLoginToken = null;
                this.loading = false;
              }

注意:

在后端项目的MiniProgramAppService.cs中,我们定义的

TokenCacheDuration为5分钟,表明二维码的有效时间为5分钟。

public static TimeSpan TokenCacheDuration = TimeSpan.FromMinutes(5);

必威体育app官方版下载相应的Token为Expired时,将wechatMiniappLoginToken置空,这一属性变动vue会通知img的src值变动而刷新小程序码,同时获取新的Token值赋值给wechatMiniappLoginToken,这也是刷新小程序码的逻辑

this.wechatMiniappLoginToken = null;

这样能以简单方式,实现二维码刷新功能。

界面中新建一个刷新小程序码的按钮:

      <el-button
        v-if="wechatMiniappLoginToken != null"
        type="primary"
        size="medium"
        @click="wechatMiniappLoginToken = null"
        >刷新
      </el-button>

编写一个externalLogin方法,在用于获取Code后,调用后端第三方登录接口,获取访问凭证存储于Cookie中

async externalLogin(userInfo: {
      authProvider: string;
      providerKey: string;
      providerAccessCode: string;
    }) {
      let authProvider = userInfo.authProvider;
      let providerKey = userInfo.providerKey;
      let providerAccessCode = userInfo.providerAccessCode;

      await request(
        `http://localhost:44311/api/TokenAuth/ExternalAuthenticate`,
        "post",
        {
          authProvider,
          providerKey,
          providerAccessCode,
        }
      ).then(async (res) => {
        var data = res.data.result;
        setToken(data.accessToken);
      });
    },

 定义setToken函数,使用js-cookie库将访问凭证写入浏览器cookie中

const tokenKey = "main_token";
const setToken = (token: string) => Cookies.set(tokenKey, token);

 

必威体育app官方版下载在此之前我们需写一个参数传递对象,为了保留一定的扩展能力,data中我们定义loginExternalForms,已经实现的微信小程序登录,则对应的authProvider值为“WeChatAuthProvider”,providerAccessCode则为生成的Token值

      loginExternalForms: {
        WeChat: {
          authProvider: "WeChatAuthProvider",
          providerKey: "default",
          providerAccessCode: "",
        },
      },

接下来包装externalLogin方法,在调用完成前后做一些操作,比如登录成功后,将调afterLoginSuccess方法

为了保留一定的扩展能力,handleExternalLogin函数中我们保留参数authProvider,已实现的微信小程序登录handleWxLogin函数调用时传递参数"WeChat"

    async handleExternalLogin(authProvider) {
      // (this.$refs.baseForm as any).validate(async (valid) => {
      //   if (valid == null) {
      var currentForms = this.loginExternalForms[authProvider];

      this.loading = true;
      return await this.ExternalLogin(currentForms).then(async (re) => {
        return await request(
          `${this.prefix}/User/GetCurrentUser`,
          "get",
          null
        ).then(async (re) => {
          var result = re.data.result as any;
          return await this.afterLoginSuccess(result);
        });
      });
    },

    async handleWxLogin(providerAccessCode) {
      this.loginExternalForms.WeChat.providerAccessCode = providerAccessCode;
      return await this.handleExternalLogin("WeChat");
    },

afterLoginSuccess函数用于登录成功后的逻辑,停止计时器,并跳转页面,本实例仅做弹窗提示

    successMessage(value = "执行成功") {
      this.$notify({
        title: "成功",
        message: value,
        type: "success",
      });
    },    

    async afterLoginSuccess(userinfo) {
      clearInterval(this.timerId);
      this.successMessage("登录成功");
      this.userInfo = userinfo;
    },

继续编写start函数

如果拿到的token至不为空,则传递值给wechatMiniappLoginStatus,当wechatMiniappLoginStatus状态为"AUTHORIZED"时调用handleWxLogin函数:

              if (re.data.result == null) {
                this.wechatMiniappLoginStatus = "EXPIRED";
                this.wechatMiniappLoginToken = null;
                this.loading = false;
              } else {
                var result = re.data.result;
                this.wechatMiniappLoginStatus = result.status;
                if (
                  this.wechatMiniappLoginStatus == "AUTHORIZED" &&
                  result.providerAccessCode != null
                ) {
                  await this.handleWxLogin(result.providerAccessCode)
                    .then(() => {
                      this.wechatMiniappLoginToken = null;
                      this.loading = false;
                    })
                    .catch((e) => {
                      this.wechatMiniappLoginToken = null;
                      this.loading = false;
                      clearInterval(this.timerId);
                    });
                } else {
                  this.loading = false;
                }
              }

接下来简单编写一个界面,

界面将清晰的反映wechatMiniappLoginStatus各个状态时对应的UI交互:

必威体育app官方版下载WAIT(等待扫码):


必威体育app官方版下载ACCESSED(已扫码):


 ACCESSED(已扫码):


 

完整的Html代码如下:

<template>
  <div id="app">
    <!-- <img alt="Vue logo" src="./assets/logo.png" />
    <HelloWorld msg="Welcome to Your Vue.js App" /> -->
    <div style="height: 450px">
      <div v-if="wechatMiniappLoginStatus == 'ACCESSED'">
        <el-result
          icon="info"
          title="已扫码"
          subTitle="请在小程序上根据提示进行操作"
        >
        </el-result>
      </div>

      <div v-else-if="wechatMiniappLoginStatus == 'AUTHORIZED'">
        <el-result
          icon="success"
          title="已授权"
          :subTitle="loading ? '请稍候..' : '正在使用微信账号登录系统'"
        >
        </el-result>
      </div>
      <div v-else class="center">
        <img
          :src="`${prefix}/MiniProgram/GetACode?scene=${getToken()}&page=${miniappPage}&mode=content`"
        />
      </div>
    </div>
    <div class="center">
      <el-button
        v-if="wechatMiniappLoginToken != null"
        type="primary"
        size="medium"
        @click="wechatMiniappLoginToken = null"
        >刷新</el-button
      >
    </div>
    <div class="center">
      <span>{{ userInfo }}</span>
    </div>
  </div>
</template>

必威体育app官方版下载至此我们已完成网页端的开发工作

posted @ 2022-07-19 17:08  林晓lx  阅读(190)  评论(0编辑