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

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import React from 'react'
import cookie from 'cookie'
import PropTypes from 'prop-types'
import { ApolloProvider, getDataFromTree } from 'react-apollo'
import initApollo from './init-apollo'
function parseCookies (ctx = {}, options = {}) {
return cookie.parse(
ctx.req && ctx.req.headers.cookie
? ctx.req.headers.cookie
: document.cookie,
options
)
}
export default ComposedComponent => {
return class WithData extends React.Component {
static displayName = `WithData(${ComposedComponent.displayName})`
static propTypes = {
serverState: PropTypes.object.isRequired
}
static async getInitialProps (context) {
let serverState = {}
// Setup a server-side one-time-use apollo client for initial props and
// rendering (on server)
let apollo = initApollo({}, {
getToken: () => parseCookies(context).token
})
// Evaluate the composed component's getInitialProps()
let composedInitialProps = {}
if (ComposedComponent.getInitialProps) {
composedInitialProps = await ComposedComponent.getInitialProps(context, apollo)
}
// Run all graphql queries in the component tree
// and extract the resulting data
if (!process.browser) {
if (context.res && context.res.finished) {
// When redirecting, the response is finished.
// No point in continuing to render
return
}
// Provide the `url` prop data in case a graphql query uses it
const url = {query: context.query, pathname: context.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,
...composedInitialProps
}
}
constructor (props) {
super(props)
// Note: Apollo should never be used on the server side beyond the initial
// render within `getInitialProps()` above (since the entire prop tree
// will be initialized there), meaning the below will only ever be
// executed on the client.
this.apollo = initApollo(this.props.serverState, {
getToken: () => parseCookies().token
})
}
render () {
return (
<ApolloProvider client={this.apollo}>
<ComposedComponent {...this.props} />
</ApolloProvider>
)
}
}
}