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我将 vue-apollo 与 AWSAppSyncClient 一起使用。我已经关注了 Vue 的这个文档 - https://github.com/awslabs/aws-mobile-appsync-sdk-js。我的要求是用户应该能够订阅 appsync。这是 main.js 代码。

import './bootstrap';
import router from './routes';
import store from './store';
import App from './components/templates/App';
import AWSAppSyncClient from 'aws-appsync';
import VueApollo from "vue-apollo";

const config = {
  url: process.env.MIX_APPSYNC_URL,
  region: process.env.MIX_APPSYNC_REGION,
  auth: {
    type: process.env.MIX_APPSYNC_TYPE,
    credentials: {
      accessKeyId: "temporary access key goes here",
      secretAccessKey: "temporary secret access key goes here",
      sessionToken: "session token goes here"
    }
  },
};

用户使用 aws cognito 验证成功登录后，我得到了“凭据”部分。

const options = {
  defaultOptions: {
    watchQuery: {
      fetchPolicy: 'cache-and-network',
    }
  }
}

// Create the apollo client
const apolloClient = new AWSAppSyncClient(config, options);

//The provider holds the Apollo client instances that can then be used by all the child components.
const apolloProvider = new VueApollo({
  defaultClient: apolloClient,
});

var vm = new Vue({
  el:"#dashboardapp",
  router:router,
  apolloProvider:apolloProvider,
  store:store,
  components: { App },
  template: '<App/>',
  data() {
    return {

    }
  },
});

上述设置工作正常。用户可以登录。在 cognito 验证用户后，它会发送临时凭证（访问密钥、密钥、会话令牌）。使用临时凭据，我可以通过 vue-apollo 订阅 aws appsync。但是，凭证的有效期仅为 1 小时。所以我需要更新凭据并保留订阅部分以获取实时数据。但我不知道该怎么做。我浏览了文档，但找不到任何特定于我的案例的内容。

我需要从“vm”的子组件或 vuex 商店更新凭据。我已经更新了凭据。我只是不知道如何将其传递给“AWSAppSyncClient”以及如何使用更新的凭证重新订阅。我也不想重新加载页面。它应该在不重新加载页面的情况下更新凭据。希望以前有人会这样做吗？

4

1 回答 1

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我对我的代码做了一些更改，现在我能够实现我想要的。这是我所做的更改，以防有人做同样的事情。

首先将 apollo 客户端加载为空白 - 意味着 main.js 文件中没有 awsappsyncclient。

import './bootstrap';
import router from './routes';
import store from './store';
import App from './components/templates/App';
import VueApollo from "vue-apollo";

// Create the apollo client
const apolloClient = '';

//The provider holds the Apollo client instances that can then be used by all the child components.
const apolloProvider = new VueApollo({
  defaultClient: apolloClient,
});

var vm = new Vue({
  el:"#dashboardapp",
  router:router,
  apolloProvider:apolloProvider,
  store:store,
  components: { App },
  template: '<App/>',
  data() {
    return {

    }
  },
});

然后从子组件中创建智能订阅。临时凭据过期后，我将生成新凭据并在 vuex 存储中进行更新。基于更改，我将放弃旧的智能订阅并创建新的智能订阅。

这是子组件代码。

<template>
  <div class="status-frame">
   <!-- relevant code goes here -->
  </div>
</template>

<script>
import gql from 'graphql-tag';
import AWSAppSyncClient from 'aws-appsync';
import VueApollo from "vue-apollo";

export default {
  data () {
    return {

    }
  },
  methods: {
    timelineSubscribe() {
      if(this.$parent.$apolloProvider.clients[1]) {
        delete this.$parent.$apolloProvider.clients[1];
        this.$apollo.subscriptions.subscribeToNewNotification.stop();
      }
      const config = {
        url: process.env.MIX_APPSYNC_URL,
        region: process.env.MIX_APPSYNC_REGION,
        auth: {
          type: process.env.MIX_APPSYNC_TYPE,
          credentials: {
            accessKeyId: this.appsyncObj.accessKeyId,
            secretAccessKey: this.appsyncObj.secretAccessKey,
            sessionToken: this.appsyncObj.sessionToken
          }
        },
      };

      const options = {
        defaultOptions: {
          watchQuery: {
            fetchPolicy: 'cache-and-network',
          }
        }
      } 

      // Create the apollo client
      const apolloClient = new AWSAppSyncClient(config, options);

      // add apolloClient to a new index in apolloProvider. 
      this.$parent.$apolloProvider.clients[1] = apolloClient;

      console.log(this.$apollo.provider.clients);

      this.$apollo.addSmartSubscription('subscribeToAnything', {
        client: '1',
        query: gql`subscription subscribeToAnything ($accountId: String!) {
          subscribeToAnything(accountId: $accountId) {
           // required fields goes here
          }
        }`,

        // Reactive variables
        variables() {
        // This works just like regular queries
        // and will re-subscribe with the right variables
        // each time the values change
          return {
            accountId: 'account_id goes here',
          }
        },
       // Result hook
       result(data) {
         console.log(data);
       },
       skip () {
         return false;
       }
      });
    }
  },
  computed: {
    appsyncObj() {
      return this.$store.getters['profile/appsyncObj']; // get from vuex store
    }
  },
  watch: {
    'appsyncObj' () {
      this.timelineSubscribe(); // each time appsyncObj changes, it will call  this method and resubscribe with new credentials.
    }
  },
}

我在登录后和获得新凭据后更新了 appsyncObj 的 vuex 商店。但是，我没有在此处添加该代码。

于 2019-01-09T06:04:53.907 回答