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next.js/examples/with-apollo-auth/lib/withApollo.js

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import React from 'react'
import cookie from 'cookie'
import PropTypes from 'prop-types'
import { getDataFromTree } from 'react-apollo'
import Head from 'next/head'
import initApollo from './initApollo'
function parseCookies(req, options = {}) {
return cookie.parse(
req ? req.headers.cookie || '' : document.cookie,
options
)
}
export default App => {
return class WithData extends React.Component {
static displayName = `WithData(${App.displayName})`
static propTypes = {
apolloState: PropTypes.object.isRequired
}
static async getInitialProps(ctx) {
const { Component, router, ctx: { req, res } } = ctx
const apollo = initApollo({}, {
getToken: () => parseCookies(req).token
})
ctx.ctx.apolloClient = apollo
let appProps = {}
if (App.getInitialProps) {
appProps = await App.getInitialProps(ctx)
}
if (res && res.finished) {
// When redirecting, the response is finished.
// No point in continuing to render
return {}
}
// Run all graphql queries in the component tree
// and extract the resulting data
try {
// Run all GraphQL queries
await getDataFromTree(
<App
{...appProps}
Component={Component}
router={router}
apolloClient={apollo}
/>
)
} catch (error) {
// Prevent Apollo Client GraphQL errors from crashing SSR.
// Handle them in components via the data.error prop:
// http://dev.apollodata.com/react/api-queries.html#graphql-query-data-error
console.error('Error while running `getDataFromTree`', error)
}
if (!process.browser) {
// getDataFromTree does not call componentWillUnmount
// head side effect therefore need to be cleared manually
Head.rewind()
}
// Extract query data from the Apollo's store
const apolloState = apollo.cache.extract()
return {
...appProps,
apolloState
}
}
constructor(props) {
super(props)
// `getDataFromTree` renders the component first, the client is passed off as a property.
// After that rendering is done using Next's normal rendering pipeline
this.apolloClient = initApollo(props.apolloState, {
getToken: () => parseCookies().token
})
}
render() {
return <App {...this.props} apolloClient={this.apolloClient} />
}
}
}