7b2fb70a67
This PR introduces a way to use WASM in middlewares. Next.js will find all `.wasm` imports in middlewares and load them as `WebAssembly.Module` objects, which then can be later instantiated. The metadata will be stored in `middleware-manifest.json` ## Bug - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Errors have helpful link attached, see `contributing.md` ## Feature - [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Documentation added - [ ] Telemetry added. In case of a feature if it's used or not. - [ ] Errors have helpful link attached, see `contributing.md` ## Documentation / Examples - [ ] Make sure the linting passes by running `yarn lint`
103 lines
2.9 KiB
TypeScript
103 lines
2.9 KiB
TypeScript
import { createNext, FileRef } from 'e2e-utils'
|
|
import { NextInstance } from 'test/lib/next-modes/base'
|
|
import { fetchViaHTTP } from 'next-test-utils'
|
|
import path from 'path'
|
|
import fs from 'fs-extra'
|
|
|
|
function baseNextConfig(): Parameters<typeof createNext>[0] {
|
|
return {
|
|
files: {
|
|
'src/add.wasm': new FileRef(path.join(__dirname, './add.wasm')),
|
|
'src/add.js': `
|
|
import wasm from './add.wasm?module'
|
|
const instance$ = WebAssembly.instantiate(wasm);
|
|
|
|
export async function increment(a) {
|
|
const { exports } = await instance$;
|
|
return exports.add_one(a);
|
|
}
|
|
`,
|
|
'pages/_middleware.js': `
|
|
import { increment } from '../src/add.js'
|
|
export default async function middleware(request) {
|
|
const input = Number(request.nextUrl.searchParams.get('input')) || 1;
|
|
const value = await increment(input);
|
|
return new Response(JSON.stringify({ input, value }));
|
|
}
|
|
`,
|
|
},
|
|
}
|
|
}
|
|
|
|
describe('middleware can use wasm files', () => {
|
|
let next: NextInstance
|
|
|
|
beforeAll(async () => {
|
|
const config = baseNextConfig()
|
|
next = await createNext(config)
|
|
})
|
|
afterAll(() => next.destroy())
|
|
|
|
it('uses the wasm file', async () => {
|
|
const response = await fetchViaHTTP(next.url, '/')
|
|
expect(await response.json()).toEqual({
|
|
input: 1,
|
|
value: 2,
|
|
})
|
|
})
|
|
|
|
it('can be called twice', async () => {
|
|
const response = await fetchViaHTTP(next.url, '/', { input: 2 })
|
|
expect(await response.json()).toEqual({
|
|
input: 2,
|
|
value: 3,
|
|
})
|
|
})
|
|
|
|
it('lists the necessary wasm bindings in the manifest', async () => {
|
|
const manifestPath = path.join(
|
|
next.testDir,
|
|
'.next/server/middleware-manifest.json'
|
|
)
|
|
const manifest = await fs.readJSON(manifestPath)
|
|
expect(manifest.middleware['/']).toMatchObject({
|
|
wasm: [
|
|
{
|
|
filePath:
|
|
'server/middleware-chunks/wasm_58ccff8b2b94b5dac6ef8957082ecd8f6d34186d.wasm',
|
|
name: 'wasm_58ccff8b2b94b5dac6ef8957082ecd8f6d34186d',
|
|
},
|
|
],
|
|
})
|
|
})
|
|
})
|
|
|
|
describe('middleware can use wasm files with the experimental modes on', () => {
|
|
let next: NextInstance
|
|
|
|
beforeAll(async () => {
|
|
const config = baseNextConfig()
|
|
config.files['next.config.js'] = `
|
|
module.exports = {
|
|
webpack(config) {
|
|
config.output.webassemblyModuleFilename = 'static/wasm/[modulehash].wasm'
|
|
|
|
// Since Webpack 5 doesn't enable WebAssembly by default, we should do it manually
|
|
config.experiments = { ...config.experiments, asyncWebAssembly: true }
|
|
|
|
return config
|
|
},
|
|
}
|
|
`
|
|
next = await createNext(config)
|
|
})
|
|
afterAll(() => next.destroy())
|
|
|
|
it('uses the wasm file', async () => {
|
|
const response = await fetchViaHTTP(next.url, '/')
|
|
expect(await response.json()).toEqual({
|
|
input: 1,
|
|
value: 2,
|
|
})
|
|
})
|
|
})
|