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dns: support dns module in the snapshot
For the initial iteration, only the default resolver can be serialized/deserialized. If `dns.setServers()` has been called, we'll preserve the configured DNS servers in the snapshot. We can consider exposing the serialization method if it becomes necessary for user-land snapshots. PR-URL: #44633 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| 'use strict'; | ||
|
|
||
| const tmpdir = require('../common/tmpdir'); | ||
| const { spawnSync } = require('child_process'); | ||
| const path = require('path'); | ||
| const fs = require('fs'); | ||
| const assert = require('assert'); | ||
|
|
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| function buildSnapshot(entry, env) { | ||
| const child = spawnSync(process.execPath, [ | ||
| '--snapshot-blob', | ||
| path.join(tmpdir.path, 'snapshot.blob'), | ||
| '--build-snapshot', | ||
| entry, | ||
| ], { | ||
| cwd: tmpdir.path, | ||
| env: { | ||
| ...process.env, | ||
| ...env, | ||
| }, | ||
| }); | ||
|
|
||
| const stderr = child.stderr.toString(); | ||
| const stdout = child.stdout.toString(); | ||
| console.log('[stderr]'); | ||
| console.log(stderr); | ||
| console.log('[stdout]'); | ||
| console.log(stdout); | ||
|
|
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| assert.strictEqual(child.status, 0); | ||
|
|
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| const stats = fs.statSync(path.join(tmpdir.path, 'snapshot.blob')); | ||
| assert(stats.isFile()); | ||
|
|
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| return { child, stderr, stdout }; | ||
| } | ||
|
|
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| function runWithSnapshot(entry, env) { | ||
| const args = ['--snapshot-blob', path.join(tmpdir.path, 'snapshot.blob')]; | ||
| if (entry !== undefined) { | ||
| args.push(entry); | ||
| } | ||
| const child = spawnSync(process.execPath, args, { | ||
| cwd: tmpdir.path, | ||
| env: { | ||
| ...process.env, | ||
| ...env, | ||
| } | ||
| }); | ||
|
|
||
| const stderr = child.stderr.toString(); | ||
| const stdout = child.stdout.toString(); | ||
| console.log('[stderr]'); | ||
| console.log(stderr); | ||
| console.log('[stdout]'); | ||
| console.log(stdout); | ||
|
|
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| assert.strictEqual(child.status, 0); | ||
|
|
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| return { child, stderr, stdout }; | ||
| } | ||
|
|
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| module.exports = { | ||
| buildSnapshot, | ||
| runWithSnapshot, | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| 'use strict'; | ||
| const dns = require('dns'); | ||
| const assert = require('assert'); | ||
|
|
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| assert(process.env.NODE_TEST_HOST); | ||
|
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| const { | ||
| setDeserializeMainFunction, | ||
| } = require('v8').startupSnapshot; | ||
|
|
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| function onError(err) { | ||
| console.error('error:', err); | ||
| } | ||
|
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| function onLookup(address, family) { | ||
| console.log(`address: ${JSON.stringify(address)}`); | ||
| console.log(`family: ${JSON.stringify(family)}`); | ||
| } | ||
|
|
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| function query() { | ||
| const host = process.env.NODE_TEST_HOST; | ||
| if (process.env.NODE_TEST_PROMISE === 'true') { | ||
| dns.promises.lookup(host, { family: 4 }).then( | ||
| ({address, family}) => onLookup(address, family), | ||
| onError); | ||
| } else { | ||
| dns.lookup(host, { family: 4 }, (err, address, family) => { | ||
| if (err) { | ||
| onError(err); | ||
| } else { | ||
| onLookup(address, family); | ||
| } | ||
| }); | ||
| } | ||
| } | ||
|
|
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| query(); | ||
|
|
||
| setDeserializeMainFunction(query); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| 'use strict'; | ||
| const dns = require('dns'); | ||
| const assert = require('assert'); | ||
|
|
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| assert(process.env.NODE_TEST_HOST); | ||
|
|
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| const { | ||
| setDeserializeMainFunction, | ||
| } = require('v8').startupSnapshot; | ||
|
|
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| function onError(err) { | ||
| console.error('error:', err); | ||
| } | ||
|
|
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| function onResolve(addresses) { | ||
| console.log(`addresses: ${JSON.stringify(addresses)}`); | ||
| } | ||
|
|
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| function onReverse(hostnames) { | ||
| console.log(`hostnames: ${JSON.stringify(hostnames)}`); | ||
| } | ||
|
|
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| function query() { | ||
| if (process.env.NODE_TEST_DNS) { | ||
| dns.setServers([process.env.NODE_TEST_DNS]) | ||
| } | ||
|
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| const host = process.env.NODE_TEST_HOST; | ||
| if (process.env.NODE_TEST_PROMISE === 'true') { | ||
| dns.promises.resolve4(host).then(onResolve, onError); | ||
| } else { | ||
| dns.resolve4(host, (err, addresses) => { | ||
| if (err) { | ||
| onError(err); | ||
| } else { | ||
| onResolve(addresses); | ||
| } | ||
| }); | ||
| } | ||
|
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| const ip = process.env.NODE_TEST_IP; | ||
| if (ip) { | ||
| if (process.env.NODE_TEST_PROMISE === 'true') { | ||
| dns.promises.reverse(ip).then(onReverse, onError); | ||
| } else { | ||
| dns.reverse(ip, (err, hostnames) => { | ||
| if (err) { | ||
| onError(err); | ||
| } else { | ||
| onReverse(hostnames); | ||
| } | ||
| }); | ||
| } | ||
| } | ||
| } | ||
|
|
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| query(); | ||
|
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| setDeserializeMainFunction(query); |
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