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next.js/examples/with-relay-modern-server-express/server/index.js

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const express = require('express')
const graphqlHTTP = require('express-graphql')
const next = require('next')
const path = require('path')
const fs = require('fs')
const { buildSchema } = require('graphql')
const rootValue = require('./rootValue')
const port = parseInt(process.env.PORT, 10) || 3000
const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()
const schemaPath = path.join(__dirname, '/schema.graphql')
const schemaContent = fs.readFileSync(schemaPath).toString()
const graphqlSchema = buildSchema(schemaContent)
app.prepare().then(() => {
const server = express()
server.use(
'/graphql',
graphqlHTTP({
schema: graphqlSchema,
graphiql: false,
rootValue: rootValue
})
)
server.get('*', (req, res) => {
return handle(req, res)
})
server.listen(port, err => {
if (err) throw err
console.log(`> Ready on http://localhost:${port}`)
})
})