Created
February 14, 2018 03:43
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| import ApolloClient from 'apollo-client'; | |
| import { getOperationAST } from 'graphql'; | |
| import { ApolloLink } from 'apollo-link'; | |
| import { HttpLink } from 'apollo-link-http'; | |
| import { WebSocketLink } from 'apollo-link-ws'; | |
| import { InMemoryCache } from 'apollo-cache-inmemory'; | |
| import fetch from 'isomorphic-fetch'; | |
| import WebSocket from 'ws'; | |
| let apolloClient = null; | |
| if (!process.browser) { | |
| global.fetch = fetch; | |
| } | |
| const initNetworkInterface = (headers) => { | |
| const httpLink = new HttpLink({ | |
| uri: `${process.env.API_HOST}/graphql`, | |
| headers, | |
| credentials: 'include', | |
| }); | |
| const wsLink = new WebSocketLink({ | |
| uri: `${process.env.SOCKET_API}/subscriptions`, | |
| options: { | |
| reconnect: true, | |
| }, | |
| webSocketImpl: !process.browser && WebSocket, | |
| }); | |
| const link = ApolloLink.split( | |
| (operation) => { | |
| const operationAST = getOperationAST(operation.query, operation.operationName); | |
| return !!operationAST && operationAST.operation === 'subscription'; | |
| }, | |
| wsLink, | |
| httpLink, | |
| ); | |
| return link; | |
| }; | |
| const createClient = (initialState, headers) => | |
| new ApolloClient({ | |
| ssrMode: !process.browser, | |
| ssrForceFetchDelay: 100, | |
| link: initNetworkInterface(headers), | |
| cache: new InMemoryCache().restore(initialState), | |
| }); | |
| export default (initialState, headers) => { | |
| if (!process.browser) { | |
| return createClient(initialState, headers); | |
| } | |
| if (!apolloClient) { | |
| apolloClient = createClient(initialState, headers); | |
| } | |
| return apolloClient; | |
| }; |
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