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fix: correctly handle DNS lookup on localhost, and fallback if needed

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This commit is contained in:
Brandon Gillis 2023-12-04 19:58:13 +01:00
parent dc39538d02
commit 5f988af6a9
1 changed files with 31 additions and 6 deletions
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37
packages/bruno-electron/src/ipc/network/axios-instance.js
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@ -1,6 +1,7 @@
const URL = require('url');
const Socket = require('net').Socket;
const axios = require('axios');
const dnsPromises = require('dns').promises;
const connectionCache = new Map(); // Cache to store checkConnection() results
const LOCAL_IPV6 = '::1';
@ -32,7 +33,7 @@ const checkConnection = (host, port) =>
});
socket.once('error', () => {
connectionCache.set(key, false); // Cache failed connection
// we don't cache here, we want to test the connection everytime if it fails.
resolve(false);
});
@ -41,6 +42,34 @@ const checkConnection = (host, port) =>
}
});
const localhostLookup = (url, hostname, options, callback) => {
const port = Number(url.port) || (url.protocol.includes('https') ? 443 : 80);
dnsPromises
.lookup(hostname, options)
.then((res) => handleSuccessfulLookup(port, res, callback))
.catch(() => handleCustomLookup(port, callback));
};
const handleSuccessfulLookup = (port, res, callback) => {
/**
* If we're here it means that localhost or *.localhost resolved to an IP address inside the hosts file,
* but we still need to check connectivity, as localhost could resolve to 127.0.0.1, but a server could listen on ::1.
*/
console.log('DNS lookup successful, checking connection');
checkConnection(res.address, port).then((success) =>
success ? callback(null, res.address, res.family) : handleCustomLookup(port, callback)
);
};
const handleCustomLookup = (port, callback) => {
console.log(`DNS lookup failed, falling back to custom lookup.`);
checkConnection(LOCAL_IPV6, port).then((useIpv6) => {
const ip = useIpv6 ? LOCAL_IPV6 : LOCAL_IPV4;
callback(null, ip, useIpv6 ? 6 : 4);
});
};
/**
* Function that configures axios with timing interceptors
* Important to note here that the timings are not completely accurate.
@ -60,11 +89,7 @@ function makeAxiosInstance() {
if (getTld(url.hostname) === LOCALHOST || url.hostname === LOCAL_IPV4 || url.hostname === LOCAL_IPV6) {
// use custom DNS lookup for localhost
config.lookup = (hostname, options, callback) => {
const portNumber = Number(url.port) || (url.protocol.includes('https') ? 443 : 80);
checkConnection(LOCAL_IPV6, portNumber).then((useIpv6) => {
const ip = useIpv6 ? LOCAL_IPV6 : LOCAL_IPV4;
callback(null, ip, useIpv6 ? 6 : 4);
});
localhostLookup(url, hostname, options, callback);
};
}