Top 10 Examples of "dns in functional component" in JavaScript
Dive into secure and efficient coding practices with our curated list of the top 10 examples showcasing 'dns' in functional components in JavaScript. Our advanced machine learning engine meticulously scans each line of code, cross-referencing millions of open source libraries to ensure your implementation is not just functional, but also robust and secure. Elevate your React applications to new heights by mastering the art of handling side effects, API calls, and asynchronous operations with confidence and precision.
dnsopts.hints = dns.ADDRCONFIG;
// The AI_V4MAPPED hint is not supported on FreeBSD, and getaddrinfo
// returns EAI_BADFLAGS. However, it seems to be supported on most other
// systems. See
// http://lists.freebsd.org/pipermail/freebsd-bugs/2008-February/028260.html
// and
// https://svnweb.freebsd.org/base/head/lib/libc/net/getaddrinfo.c?r1=172052&r2=175955
// for more information on the lack of support for FreeBSD.
if (process.platform !== 'freebsd')
dnsopts.hints |= dns.V4MAPPED;
}
debug('connect: find host ' + host);
debug('connect: dns options ' + dnsopts);
self._host = host;
dns.lookup(host, dnsopts, function(err, ip, addressType) {
self.emit('lookup', err, ip, addressType);
// It's possible we were destroyed while looking this up.
// XXX it would be great if we could cancel the promise returned by
// the look up.
if (!self._connecting) return;
if (err) {
// net.createConnection() creates a net.Socket object and
// immediately calls net.Socket.connect() on it (that's us).
// There are no event listeners registered yet so defer the
// error event to the next tick.
process.nextTick(function() {
self.emit('error', err);
self._destroy();
});dnsopts.hints = dns.ADDRCONFIG;
// The AI_V4MAPPED hint is not supported on FreeBSD, and getaddrinfo
// returns EAI_BADFLAGS. However, it seems to be supported on most other
// systems. See
// http://lists.freebsd.org/pipermail/freebsd-bugs/2008-February/028260.html
// and
// https://svnweb.freebsd.org/base/head/lib/libc/net/getaddrinfo.c?r1=172052&r2=175955
// for more information on the lack of support for FreeBSD.
if (process.platform !== 'freebsd')
dnsopts.hints |= dns.V4MAPPED;
}
debug('connect: find host ' + host);
debug('connect: dns options ' + dnsopts);
self._host = host;
dns.lookup(host, dnsopts, function(err, ip, addressType) {
self.emit('lookup', err, ip, addressType);
// It's possible we were destroyed while looking this up.
// XXX it would be great if we could cancel the promise returned by
// the look up.
if (!self._connecting) return;
if (err) {
// net.createConnection() creates a net.Socket object and
// immediately calls net.Socket.connect() on it (that's us).
// There are no event listeners registered yet so defer the
// error event to the next tick.
process.nextTick(function() {
self.emit('error', err);
self._destroy();
});// been solved before in https://github.com/nodejs/node/pull/12342, but was
// reverted as it had unintended side effects.
if (Array.isArray(args[0]) && args[0][normalizedArgsSymbol])
normalized = args[0];
else
normalized = normalizeArgs(args);
let options = normalized[0];
let cb = normalized[1];
if (!options.host)
options.host = '127.0.0.1';
let family = options.port === undefined ? 0 : native.isIP(options.host);
if (options.port === undefined || family)
this._connect(options, family, options.port === undefined ? options.path : options.host, cb);
else
dns.lookup(options.host, (err, host, family) => {
this.emit('lookup', err, options.host, family, host);
if (err) {
this.connecting = false;
this._updateRef();
this.emit('error', err);
return;
}
if (this.destroyed) {
this.connecting = false;
this._updateRef();
return;
}
this._connect(options, family, host, cb);
});var lookup = function(address, family, callback) {
// implicit 'bind before send' needs to run on the same tick
var matchedFamily = isIP(address);
if (matchedFamily)
return callback(null, address, matchedFamily);
if (!dns)
dns = require('dns');
return dns.lookup(address, family, callback);
};function resolve4(next) {
dns.resolve4(name, function resolve4Callback(err, arr) {
if (arr) {
arr.forEach(address => addresses.push({ address, isIPv6: false }));
}
// Ignore error
next();
});
},
function resolve6(next) {TEST(function test_lookup_ipv4_explicit(done) {
var req = dns.lookup('www.google.com', 4, function(err, ip, family) {
if (err) throw err;
assert.ok(net.isIPv4(ip));
assert.strictEqual(family, 4);
done();
});
checkWrap(req);
});return function(errr, stdout) {
var expected = stdout.substr(0, stdout.length - 1).split('\n');
var reversing = dns.reverse(myIp, function(error, domains, ttl, cname) {
if (error) domains = [];
cmpResults(expected, domains, ttl, cname);
});
}
}TEST(function test_lookup_localhost_ipv4(done) {
var req = dns.lookup('localhost', 4, function(err, ip, family) {
if (err) throw err;
assert.strictEqual(ip, '127.0.0.1');
assert.strictEqual(family, 4);
done();
});
checkWrap(req);
});resolution.addCallback(function (addresses, ttl, cname) {
puts("addresses: " + JSON.stringify(addresses));
puts("ttl: " + JSON.stringify(ttl));
puts("cname: " + JSON.stringify(cname));
for (var i = 0; i < addresses.length; i++) {
var a = addresses[i];
var reversing = dns.reverse(a);
reversing.addCallback( function (domains, ttl, cname) {
puts("reverse for " + a + ": " + JSON.stringify(domains));
});
reversing.addErrback( function (code, msg) {
puts("reverse for " + a + " failed: " + msg);
});
}
});TEST(function test_resolve4(done) {
var req = dns.resolve4('www.google.com', function(err, ips) {
if (err) throw err;
assert.ok(ips.length > 0);
for (var i = 0; i < ips.length; i++) {
assert.ok(isIPv4(ips[i]));
}
done();
});
checkWrap(req);
});