overleaf/libraries/fetch-utils/test/unit/FetchUtilsTests.js
Antoine Clausse 6c2cf20125 Merge pull request #20552 from overleaf/ac-update-node-fetch-2
Reapply "Upgrade node-fetch to 2.7.0", Fix fetch-utils tests

GitOrigin-RevId: b42a2d2c50ce73f474e39755845e4df065f30b48
2024-10-01 08:05:18 +00:00

410 lines
13 KiB
JavaScript

const { expect } = require('chai')
const { FetchError, AbortError } = require('node-fetch')
const { Readable } = require('stream')
const { once } = require('events')
const { TestServer } = require('./helpers/TestServer')
const selfsigned = require('selfsigned')
const {
fetchJson,
fetchStream,
fetchNothing,
fetchRedirect,
fetchString,
RequestFailedError,
CustomHttpAgent,
CustomHttpsAgent,
} = require('../..')
const HTTP_PORT = 30001
const HTTPS_PORT = 30002
const attrs = [{ name: 'commonName', value: 'example.com' }]
const pems = selfsigned.generate(attrs, { days: 365 })
const PRIVATE_KEY = pems.private
const PUBLIC_CERT = pems.cert
const dns = require('dns')
const _originalLookup = dns.lookup
// Custom DNS resolver function
dns.lookup = (hostname, options, callback) => {
if (hostname === 'example.com') {
// If the hostname is our test case, return the ip address for the test server
callback(null, '127.0.0.1', 4)
} else {
// Otherwise, use the default lookup
_originalLookup(hostname, options, callback)
}
}
describe('fetch-utils', function () {
before(async function () {
this.server = new TestServer()
await this.server.start(HTTP_PORT, HTTPS_PORT, {
key: PRIVATE_KEY,
cert: PUBLIC_CERT,
})
this.url = path => `http://example.com:${HTTP_PORT}${path}`
this.httpsUrl = path => `https://example.com:${HTTPS_PORT}${path}`
})
beforeEach(function () {
this.server.lastReq = undefined
})
after(async function () {
await this.server.stop()
})
describe('fetchJson', function () {
it('parses a JSON response', async function () {
const json = await fetchJson(this.url('/json/hello'))
expect(json).to.deep.equal({ msg: 'hello' })
})
it('parses JSON in the request', async function () {
const json = await fetchJson(this.url('/json/add'), {
method: 'POST',
json: { a: 2, b: 3 },
})
expect(json).to.deep.equal({ sum: 5 })
})
it('accepts stringified JSON as body', async function () {
const json = await fetchJson(this.url('/json/add'), {
method: 'POST',
body: JSON.stringify({ a: 2, b: 3 }),
headers: { 'Content-Type': 'application/json' },
})
expect(json).to.deep.equal({ sum: 5 })
})
it('throws a FetchError when the payload is not JSON', async function () {
await expect(fetchJson(this.url('/hello'))).to.be.rejectedWith(FetchError)
})
it('aborts the request if JSON parsing fails', async function () {
await expect(fetchJson(this.url('/large'))).to.be.rejectedWith(FetchError)
await expectRequestAborted(this.server.lastReq)
})
it('handles errors when the payload is JSON', async function () {
await expect(fetchJson(this.url('/json/500'))).to.be.rejectedWith(
RequestFailedError
)
await expectRequestAborted(this.server.lastReq)
})
it('handles errors when the payload is not JSON', async function () {
await expect(fetchJson(this.url('/500'))).to.be.rejectedWith(
RequestFailedError
)
await expectRequestAborted(this.server.lastReq)
})
it('supports abort signals', async function () {
await expect(
abortOnceReceived(
signal => fetchJson(this.url('/hang'), { signal }),
this.server
)
).to.be.rejectedWith(AbortError)
await expectRequestAborted(this.server.lastReq)
})
it('supports basic auth', async function () {
const json = await fetchJson(this.url('/json/basic-auth'), {
basicAuth: { user: 'user', password: 'pass' },
})
expect(json).to.deep.equal({ key: 'verysecret' })
})
it("destroys the request body if it doesn't get consumed", async function () {
const stream = Readable.from(infiniteIterator())
await fetchJson(this.url('/json/ignore-request'), {
method: 'POST',
body: stream,
})
expect(stream.destroyed).to.be.true
})
})
describe('fetchStream', function () {
it('returns a stream', async function () {
const stream = await fetchStream(this.url('/large'))
const text = await streamToString(stream)
expect(text).to.equal(this.server.largePayload)
})
it('aborts the request when the stream is destroyed', async function () {
const stream = await fetchStream(this.url('/large'))
stream.destroy()
await expectRequestAborted(this.server.lastReq)
})
it('aborts the request when the request body is destroyed before transfer', async function () {
const stream = Readable.from(infiniteIterator())
const promise = fetchStream(this.url('/hang'), {
method: 'POST',
body: stream,
})
stream.destroy()
await expect(promise).to.be.rejectedWith(AbortError)
await wait(80)
expect(this.server.lastReq).to.be.undefined
})
it('aborts the request when the request body is destroyed during transfer', async function () {
const stream = Readable.from(infiniteIterator())
// Note: this test won't work on `/hang`
const promise = fetchStream(this.url('/sink'), {
method: 'POST',
body: stream,
})
await once(this.server.events, 'request-received')
stream.destroy()
await expect(promise).to.be.rejectedWith(AbortError)
await expectRequestAborted(this.server.lastReq)
})
it('handles errors', async function () {
await expect(fetchStream(this.url('/500'))).to.be.rejectedWith(
RequestFailedError
)
await expectRequestAborted(this.server.lastReq)
})
it('supports abort signals', async function () {
await expect(
abortOnceReceived(
signal => fetchStream(this.url('/hang'), { signal }),
this.server
)
).to.be.rejectedWith(AbortError)
await expectRequestAborted(this.server.lastReq)
})
it('destroys the request body when an error occurs', async function () {
const stream = Readable.from(infiniteIterator())
await expect(
abortOnceReceived(
signal =>
fetchStream(this.url('/hang'), {
method: 'POST',
body: stream,
signal,
}),
this.server
)
).to.be.rejectedWith(AbortError)
expect(stream.destroyed).to.be.true
})
})
describe('fetchNothing', function () {
it('closes the connection', async function () {
await fetchNothing(this.url('/large'))
await expectRequestAborted(this.server.lastReq)
})
it('aborts the request when the request body is destroyed before transfer', async function () {
const stream = Readable.from(infiniteIterator())
const promise = fetchNothing(this.url('/hang'), {
method: 'POST',
body: stream,
})
stream.destroy()
await expect(promise).to.be.rejectedWith(AbortError)
expect(this.server.lastReq).to.be.undefined
})
it('aborts the request when the request body is destroyed during transfer', async function () {
const stream = Readable.from(infiniteIterator())
// Note: this test won't work on `/hang`
const promise = fetchNothing(this.url('/sink'), {
method: 'POST',
body: stream,
})
await once(this.server.events, 'request-received')
stream.destroy()
await expect(promise).to.be.rejectedWith(AbortError)
await wait(80)
await expectRequestAborted(this.server.lastReq)
})
it("doesn't abort the request if the request body ends normally", async function () {
const stream = Readable.from('hello there')
await fetchNothing(this.url('/sink'), { method: 'POST', body: stream })
})
it('handles errors', async function () {
await expect(fetchNothing(this.url('/500'))).to.be.rejectedWith(
RequestFailedError
)
await expectRequestAborted(this.server.lastReq)
})
it('supports abort signals', async function () {
await expect(
abortOnceReceived(
signal => fetchNothing(this.url('/hang'), { signal }),
this.server
)
).to.be.rejectedWith(AbortError)
await expectRequestAborted(this.server.lastReq)
})
it('destroys the request body when an error occurs', async function () {
const stream = Readable.from(infiniteIterator())
await expect(
abortOnceReceived(
signal =>
fetchNothing(this.url('/hang'), {
method: 'POST',
body: stream,
signal,
}),
this.server
)
).to.be.rejectedWith(AbortError)
expect(stream.destroyed).to.be.true
})
})
describe('fetchString', function () {
it('returns a string', async function () {
const body = await fetchString(this.url('/hello'))
expect(body).to.equal('hello')
})
it('handles errors', async function () {
await expect(fetchString(this.url('/500'))).to.be.rejectedWith(
RequestFailedError
)
await expectRequestAborted(this.server.lastReq)
})
})
describe('fetchRedirect', function () {
it('returns the immediate redirect', async function () {
const body = await fetchRedirect(this.url('/redirect/1'))
expect(body).to.equal(this.url('/redirect/2'))
})
it('rejects status 200', async function () {
await expect(fetchRedirect(this.url('/hello'))).to.be.rejectedWith(
RequestFailedError
)
await expectRequestAborted(this.server.lastReq)
})
it('rejects empty redirect', async function () {
await expect(fetchRedirect(this.url('/redirect/empty-location')))
.to.be.rejectedWith(RequestFailedError)
.and.eventually.have.property('cause')
.and.to.have.property('message')
.to.equal('missing Location response header on 3xx response')
await expectRequestAborted(this.server.lastReq)
})
it('handles errors', async function () {
await expect(fetchRedirect(this.url('/500'))).to.be.rejectedWith(
RequestFailedError
)
await expectRequestAborted(this.server.lastReq)
})
})
describe('CustomHttpAgent', function () {
it('makes an http request successfully', async function () {
const agent = new CustomHttpAgent({ connectTimeout: 100 })
const body = await fetchString(this.url('/hello'), { agent })
expect(body).to.equal('hello')
})
it('times out when accessing a non-routable address', async function () {
const agent = new CustomHttpAgent({ connectTimeout: 10 })
await expect(fetchString('http://10.255.255.255/', { agent }))
.to.be.rejectedWith(FetchError)
.and.eventually.have.property('message')
.and.to.equal(
'request to http://10.255.255.255/ failed, reason: connect timeout'
)
})
})
describe('CustomHttpsAgent', function () {
it('makes an https request successfully', async function () {
const agent = new CustomHttpsAgent({
connectTimeout: 100,
ca: PUBLIC_CERT,
})
const body = await fetchString(this.httpsUrl('/hello'), { agent })
expect(body).to.equal('hello')
})
it('rejects an untrusted server', async function () {
const agent = new CustomHttpsAgent({
connectTimeout: 100,
})
await expect(fetchString(this.httpsUrl('/hello'), { agent }))
.to.be.rejectedWith(FetchError)
.and.eventually.have.property('code')
.and.to.equal('DEPTH_ZERO_SELF_SIGNED_CERT')
})
it('times out when accessing a non-routable address', async function () {
const agent = new CustomHttpsAgent({ connectTimeout: 10 })
await expect(fetchString('https://10.255.255.255/', { agent }))
.to.be.rejectedWith(FetchError)
.and.eventually.have.property('message')
.and.to.equal(
'request to https://10.255.255.255/ failed, reason: connect timeout'
)
})
})
})
async function streamToString(stream) {
let s = ''
for await (const chunk of stream) {
s += chunk
}
return s
}
async function* infiniteIterator() {
let i = 1
while (true) {
yield `chunk ${i++}\n`
}
}
/**
* @param {(signal: AbortSignal) => Promise<any>} func
* @param {TestServer} server
*/
async function abortOnceReceived(func, server) {
const controller = new AbortController()
const promise = func(controller.signal)
await once(server.events, 'request-received')
controller.abort()
return await promise
}
async function expectRequestAborted(req) {
if (!req.destroyed) {
try {
await once(req, 'close')
} catch (err) {
// `once` throws if req emits an 'error' event.
// We ignore `Error: aborted` when the request is aborted.
if (err.message !== 'aborted') {
throw err
}
}
}
expect(req.destroyed).to.be.true
}
const wait = ms => new Promise(resolve => setTimeout(resolve, ms))