Javascript 将Apollo客户端与NextJS一起使用时服务器端渲染数据?
我的组件目前在浏览器上运行,这是我希望避免的。当您访问该链接时,我希望它预先添加所有需要显示的数据,即在服务器上呈现的数据。当前,该组件的外观如下所示:Javascript 将Apollo客户端与NextJS一起使用时服务器端渲染数据?,javascript,reactjs,graphql,next.js,apollo-client,Javascript,Reactjs,Graphql,Next.js,Apollo Client,我的组件目前在浏览器上运行,这是我希望避免的。当您访问该链接时,我希望它预先添加所有需要显示的数据,即在服务器上呈现的数据。当前,该组件的外观如下所示: import { graphql } from "react-apollo"; import gql from 'graphql-tag'; import withData from "../../apollo/with-data"; import getPostsQuery from '../../apollo/schemas/getPost
import { graphql } from "react-apollo";
import gql from 'graphql-tag';
import withData from "../../apollo/with-data";
import getPostsQuery from '../../apollo/schemas/getPostsQuery.graphql';
const renderers = {
paragraph: (props) => <Typography variant="body2" gutterBottom {...props} />,
};
const GET_POSTS = gql`${getPostsQuery}`;
const PostList = ({data: {error, loading, posts}}) => {
let payload;
if(error) {
payload = (<div>There was an error!</div>);
} else if(loading) {
payload = (<div>Loading...</div>);
} else {
payload = (
<>
{posts.map((post) => (
<div>
<div>{post.title}</div>
<div>{post.body}</div>
</div>
))}
</>
);
}
return payload;
};
export default withData(graphql(GET_POSTS)(PostList));
// apollo/with-data.js
import React from "react";
import PropTypes from "prop-types";
import { ApolloProvider, getDataFromTree } from "react-apollo";
import initApollo from "./init-apollo";
export default ComposedComponent => {
return class WithData extends React.Component {
static displayName = `WithData(${ComposedComponent.displayName})`;
static propTypes = {
serverState: PropTypes.object.isRequired
};
static async getInitialProps(ctx) {
const headers = ctx.req ? ctx.req.headers : {};
let serverState = {};
// Evaluate the composed component's getInitialProps()
let composedInitialProps = {};
if (ComposedComponent.getInitialProps) {
composedInitialProps = await ComposedComponent.getInitialProps(ctx);
}
// Run all graphql queries in the component tree
// and extract the resulting data
if (!process.browser) {
const apollo = initApollo(headers);
// Provide the `url` prop data in case a graphql query uses it
const url = { query: ctx.query, pathname: ctx.pathname };
// Run all graphql queries
const app = (
<ApolloProvider client={apollo}>
<ComposedComponent url={url} {...composedInitialProps} />
</ApolloProvider>
);
await getDataFromTree(app);
// Extract query data from the Apollo's store
const state = apollo.getInitialState();
serverState = {
apollo: {
// Make sure to only include Apollo's data state
data: state.data
}
};
}
return {
serverState,
headers,
...composedInitialProps
};
}
constructor(props) {
super(props);
this.apollo = initApollo(this.props.headers, this.props.serverState);
}
render() {
return (
<ApolloProvider client={this.apollo}>
<ComposedComponent {...this.props} />
</ApolloProvider>
);
}
};
};
更新:我尝试将官方withApollo示例合并到我的项目中,但它在getDataFromTree()上抛出了一个不变的错误。
:
元素类型无效:需要字符串(对于内置组件)或类/函数(对于复合组件),但得到:未定义
我对/init/apollo.js
、/components/blog/PostList.jsx
和/pages/blog/jsx
文件使用了与示例repo中完全相同的代码。我的具体案例中唯一的区别是,我有一个明确的\u app.jsx
,内容如下:
/* eslint-disable max-len */
import '../static/styles/fonts.scss';
import '../static/styles/style.scss';
import '../static/styles/some.css';
import CssBaseline from '@material-ui/core/CssBaseline';
import { ThemeProvider } from '@material-ui/styles';
import jwt from 'jsonwebtoken';
import withRedux from 'next-redux-wrapper';
import App, {
Container,
} from 'next/app';
import Head from 'next/head';
import React from 'react';
import { Provider } from 'react-redux';
import makeStore from '../reducers';
import mainTheme from '../themes/main-theme';
import getSessIDFromCookies from '../utils/get-sessid-from-cookies';
import getLanguageFromCookies from '../utils/get-language-from-cookies';
import getUserTokenFromCookies from '../utils/get-user-token-from-cookies';
import removeFbHash from '../utils/remove-fb-hash';
class MyApp extends App {
static async getInitialProps({ Component, ctx }) {
let userToken;
let sessID;
let language;
if (ctx.isServer) {
ctx.store.dispatch({ type: 'UPDATEIP', payload: ctx.req.headers['x-real-ip'] });
userToken = getUserTokenFromCookies(ctx.req);
sessID = getSessIDFromCookies(ctx.req);
language = getLanguageFromCookies(ctx.req);
const dictionary = require(`../dictionaries/${language}`);
ctx.store.dispatch({ type: 'SETLANGUAGE', payload: dictionary });
if(ctx.res) {
if(ctx.res.locals) {
if(!ctx.res.locals.authenticated) {
userToken = null;
sessID = null;
}
}
}
if (userToken && sessID) { // TBD: validate integrity of sessID
const userInfo = jwt.verify(userToken, process.env.JWT_SECRET);
ctx.store.dispatch({ type: 'ADDUSERINFO', payload: userInfo });
}
ctx.store.dispatch({ type: 'ADDSESSION', payload: sessID }); // component will be able to read from store's state when rendered
}
const pageProps = Component.getInitialProps ? await Component.getInitialProps(ctx) : {};
return { pageProps };
}
componentDidMount() {
// Remove the server-side injected CSS.
const jssStyles = document.querySelector('#jss-server-side');
if (jssStyles) {
jssStyles.parentNode.removeChild(jssStyles);
}
// Register serviceWorker
if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/serviceWorker.js'); }
// Handle FB's ugly redirect URL hash
removeFbHash(window, document);
}
render() {
const { Component, pageProps, store } = this.props;
return (
<Container>
<Head>
<meta name="viewport" content="user-scalable=0, initial-scale=1, minimum-scale=1, width=device-width, height=device-height, shrink-to-fit=no" />
<meta httpEquiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png" />
<link rel="icon" type="image/png" sizes="194x194" href="/favicon-194x194.png" />
<link rel="icon" type="image/png" sizes="192x192" href="/android-chrome-192x192.png" />
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
<link rel="manifest" href="/site.webmanifest" />
<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#663300" />
<meta name="msapplication-TileColor" content="#da532c" />
<meta name="msapplication-TileImage" content="/mstile-144x144.png" />
</Head>
<ThemeProvider theme={mainTheme}>
{/* CssBaseline kickstart an elegant, consistent, and simple baseline to build upon. */}
<CssBaseline />
<Provider store={store}>
<Component {...pageProps} />
</Provider>
</ThemeProvider>
</Container>
);
}
}
export default withRedux(makeStore)(MyApp);
/*eslint禁用最大长度*/
导入“../static/styles/fonts.scss”;
导入“../static/styles/style.scss”;
导入“../static/styles/some.css”;
从“@material ui/core/CssBaseline”导入CssBaseline;
从'@material ui/styles'导入{ThemeProvider};
从“jsonwebtoken”导入jwt;
从“下一个redux包装器”导入withRedux;
导入应用程序{
集装箱,
}来自“下一步/应用程序”;
从“下一个/头”导入头;
从“React”导入React;
从'react redux'导入{Provider};
从“../reducers”导入makeStore;
从“../themes/main-theme”导入主主题;
从“../utils/get sessiond from cookies”导入GetSessiondFromcookies;
从“../utils/get language from cookies”导入GetLanguage from cookies;
从“../utils/get user token from cookies”导入GetUserTokenfrom cookies;
从“../utils/remove fb hash”导入removeFbHash;
类MyApp扩展了应用程序{
静态异步getInitialProps({Component,ctx}){
让userToken;
让我们一起去吧;
让语言;
if(ctx.isServer){
调度({type:'UPDATEIP',payload:ctx.req.headers['x-real-ip']});
userToken=getUserTokenFromCookies(ctx.req);
sessiond=getsessiondfromcookies(ctx.req);
语言=getLanguageFromCookies(ctx.req);
const dictionary=require(`../dictionary/${language}`);
调度({type:'SETLANGUAGE',负载:dictionary});
如果(ctx.res){
如果(ctx.res.locals){
如果(!ctx.res.locals.authenticated){
userToken=null;
sessiond=null;
}
}
}
if(userToken&&sessiond){//TBD:验证sessiond的完整性
const userInfo=jwt.verify(userToken,process.env.jwt_SECRET);
调度({type:'ADDUSERINFO',负载:userInfo});
}
dispatch({type:'ADDSESSION',payload:sessiond});//组件将能够在呈现时读取存储的状态
}
const pageProps=Component.getInitialProps?等待Component.getInitialProps(ctx):{};
返回{pageProps};
}
componentDidMount(){
//删除服务器端注入的CSS。
const jssStyles=document.querySelector(“#jss服务器端”);
if(jssStyles){
jssStyles.parentNode.removeChild(jssStyles);
}
//注册服务人员
如果导航器中的('serviceWorker'){navigator.serviceWorker.register('/serviceWorker.js');}
//处理FB丑陋的重定向URL哈希
removeFbHash(窗口、文档);
}
render(){
const{Component,pageProps,store}=this.props;
返回(
{/*CssBaseline启动了一个优雅、一致且简单的基线来构建。*/}
);
}
}
使用Redux(makeStore)(MyApp)导出默认值;
摆脱这个文件不是一个选项,因为这是我处理一些预加载cookie逻辑的地方
回购协议,作为参考,在上有一些研究可以帮助:
我相信您应该使用getMarkupFromTree
,如本期所示,以及如何实现
如果你想使用hooks,你需要@特洛伊奥斯基的react阿波罗hooks
软件包
有人说这个解决方案不起作用。有人认为它有一些不足之处,例如,它两次呈现整个标记,一次接一次,一次获取apollo查询。作为回应,他们建议做一些事情,比如在GetInitialProps中直接调用查询,这只是比应该做的更多的工作,因为ssr特性应该准备好开箱即用 使用Next.js和Apollo时,您需要实现两个关键目标:SSR和缓存的网络数据。 这是一个难以兼顾的平衡。但这是可能的 方法是:
/* eslint-disable max-len */
import '../static/styles/fonts.scss';
import '../static/styles/style.scss';
import '../static/styles/some.css';
import CssBaseline from '@material-ui/core/CssBaseline';
import { ThemeProvider } from '@material-ui/styles';
import jwt from 'jsonwebtoken';
import withRedux from 'next-redux-wrapper';
import App, {
Container,
} from 'next/app';
import Head from 'next/head';
import React from 'react';
import { Provider } from 'react-redux';
import makeStore from '../reducers';
import mainTheme from '../themes/main-theme';
import getSessIDFromCookies from '../utils/get-sessid-from-cookies';
import getLanguageFromCookies from '../utils/get-language-from-cookies';
import getUserTokenFromCookies from '../utils/get-user-token-from-cookies';
import removeFbHash from '../utils/remove-fb-hash';
class MyApp extends App {
static async getInitialProps({ Component, ctx }) {
let userToken;
let sessID;
let language;
if (ctx.isServer) {
ctx.store.dispatch({ type: 'UPDATEIP', payload: ctx.req.headers['x-real-ip'] });
userToken = getUserTokenFromCookies(ctx.req);
sessID = getSessIDFromCookies(ctx.req);
language = getLanguageFromCookies(ctx.req);
const dictionary = require(`../dictionaries/${language}`);
ctx.store.dispatch({ type: 'SETLANGUAGE', payload: dictionary });
if(ctx.res) {
if(ctx.res.locals) {
if(!ctx.res.locals.authenticated) {
userToken = null;
sessID = null;
}
}
}
if (userToken && sessID) { // TBD: validate integrity of sessID
const userInfo = jwt.verify(userToken, process.env.JWT_SECRET);
ctx.store.dispatch({ type: 'ADDUSERINFO', payload: userInfo });
}
ctx.store.dispatch({ type: 'ADDSESSION', payload: sessID }); // component will be able to read from store's state when rendered
}
const pageProps = Component.getInitialProps ? await Component.getInitialProps(ctx) : {};
return { pageProps };
}
componentDidMount() {
// Remove the server-side injected CSS.
const jssStyles = document.querySelector('#jss-server-side');
if (jssStyles) {
jssStyles.parentNode.removeChild(jssStyles);
}
// Register serviceWorker
if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/serviceWorker.js'); }
// Handle FB's ugly redirect URL hash
removeFbHash(window, document);
}
render() {
const { Component, pageProps, store } = this.props;
return (
<Container>
<Head>
<meta name="viewport" content="user-scalable=0, initial-scale=1, minimum-scale=1, width=device-width, height=device-height, shrink-to-fit=no" />
<meta httpEquiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png" />
<link rel="icon" type="image/png" sizes="194x194" href="/favicon-194x194.png" />
<link rel="icon" type="image/png" sizes="192x192" href="/android-chrome-192x192.png" />
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
<link rel="manifest" href="/site.webmanifest" />
<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#663300" />
<meta name="msapplication-TileColor" content="#da532c" />
<meta name="msapplication-TileImage" content="/mstile-144x144.png" />
</Head>
<ThemeProvider theme={mainTheme}>
{/* CssBaseline kickstart an elegant, consistent, and simple baseline to build upon. */}
<CssBaseline />
<Provider store={store}>
<Component {...pageProps} />
</Provider>
</ThemeProvider>
</Container>
);
}
}
export default withRedux(makeStore)(MyApp);