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dns: allow
--dns-result-order to change default dns verbatim
Allow the `--dns-result-order` option to change the default value of verbatim in `dns.lookup()`. This is useful when running Node.js in ipv6-only environments to avoid possible ENETUNREACH errors. PR-URL: nodejs#38099 Refs: nodejs#31566 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Anna Henningsen <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // Flags: --expose-internals --dns-result-order=ipv4first | ||
| 'use strict'; | ||
| const common = require('../common'); | ||
| const assert = require('assert'); | ||
| const { internalBinding } = require('internal/test/binding'); | ||
| const cares = internalBinding('cares_wrap'); | ||
| const { promisify } = require('util'); | ||
|
|
||
| // Test that --dns-result-order=ipv4first works as expected. | ||
|
|
||
| const originalGetaddrinfo = cares.getaddrinfo; | ||
| const calls = []; | ||
| cares.getaddrinfo = common.mustCallAtLeast((...args) => { | ||
| calls.push(args); | ||
| originalGetaddrinfo(...args); | ||
| }, 1); | ||
|
|
||
| const dns = require('dns'); | ||
| const dnsPromises = dns.promises; | ||
|
|
||
| let verbatim; | ||
|
|
||
| // We want to test the parameter of verbatim only so that we | ||
| // ignore possible errors here. | ||
| function allowFailed(fn) { | ||
| return fn.catch((_err) => { | ||
| // | ||
| }); | ||
| } | ||
|
|
||
| (async () => { | ||
| let callsLength = 0; | ||
| const checkParameter = (expected) => { | ||
| assert.strictEqual(calls.length, callsLength + 1); | ||
| verbatim = calls[callsLength][4]; | ||
| assert.strictEqual(verbatim, expected); | ||
| callsLength += 1; | ||
| }; | ||
|
|
||
| await allowFailed(promisify(dns.lookup)('example.org')); | ||
| checkParameter(false); | ||
|
|
||
| await allowFailed(dnsPromises.lookup('example.org')); | ||
| checkParameter(false); | ||
|
|
||
| await allowFailed(promisify(dns.lookup)('example.org', {})); | ||
| checkParameter(false); | ||
|
|
||
| await allowFailed(dnsPromises.lookup('example.org', {})); | ||
| checkParameter(false); | ||
| })().then(common.mustCall()); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // Flags: --expose-internals --dns-result-order=verbatim | ||
| 'use strict'; | ||
| const common = require('../common'); | ||
| const assert = require('assert'); | ||
| const { internalBinding } = require('internal/test/binding'); | ||
| const cares = internalBinding('cares_wrap'); | ||
| const { promisify } = require('util'); | ||
|
|
||
| // Test that --dns-result-order=verbatim works as expected. | ||
|
|
||
| const originalGetaddrinfo = cares.getaddrinfo; | ||
| const calls = []; | ||
| cares.getaddrinfo = common.mustCallAtLeast((...args) => { | ||
| calls.push(args); | ||
| originalGetaddrinfo(...args); | ||
| }, 1); | ||
|
|
||
| const dns = require('dns'); | ||
| const dnsPromises = dns.promises; | ||
|
|
||
| let verbatim; | ||
|
|
||
| // We want to test the parameter of verbatim only so that we | ||
| // ignore possible errors here. | ||
| function allowFailed(fn) { | ||
| return fn.catch((_err) => { | ||
| // | ||
| }); | ||
| } | ||
|
|
||
| (async () => { | ||
| let callsLength = 0; | ||
| const checkParameter = (expected) => { | ||
| assert.strictEqual(calls.length, callsLength + 1); | ||
| verbatim = calls[callsLength][4]; | ||
| assert.strictEqual(verbatim, expected); | ||
| callsLength += 1; | ||
| }; | ||
|
|
||
| await allowFailed(promisify(dns.lookup)('example.org')); | ||
| checkParameter(true); | ||
|
|
||
| await allowFailed(dnsPromises.lookup('example.org')); | ||
| checkParameter(true); | ||
|
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||
| await allowFailed(promisify(dns.lookup)('example.org', {})); | ||
| checkParameter(true); | ||
|
|
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| await allowFailed(dnsPromises.lookup('example.org', {})); | ||
| checkParameter(true); | ||
| })().then(common.mustCall()); |
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