server: prefer IPv6
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> wild, it seems they had a bug about A/AAAA fallback a while ago but the
> way they fixed it is "v6 if v4 fails", not the other way around
>
> https://github.com/szmarczak/cacheable-lookup/issues/27
> b2348d5aed
>
> javascript community pls
-- @sn0w@cofe.rocks
This commit is contained in:
Johann150 2024-01-23 19:57:37 +01:00
parent 6fd422f2b0
commit 83bce62672
Signed by: Johann150
GPG key ID: 9EE6577A2A06F8F1

View file

@ -1,6 +1,7 @@
import * as http from 'node:http';
import * as https from 'node:https';
import { URL } from 'node:url';
import * as dns from 'node:dns';
import CacheableLookup from 'cacheable-lookup';
import fetch from 'node-fetch';
import { HttpProxyAgent, HttpsProxyAgent } from 'hpagent';
@ -78,13 +79,38 @@ const cache = new CacheableLookup({
lookup: false, // nativeのdns.lookupにfallbackしない
});
// because `cacheable-lookup` is annoying and prefers IPv4 by default,
// we need a little wrapper setting some extra options
const cacheLookup = (host, _2, _3) => {
// do all the weird parameter shenanigans that nodejs's dns.lookup does.
let options = {}, callback;
if (_3) {
options = _2;
if (typeof options === 'number') {
options = { family: options };
}
callback = _3;
} else {
callback = _2;
}
// here come the shenanigans, trying to be careful not to mess up
// intentionally different behaviour
if (options.family == null && (options.hints ?? 0) === 0) {
options.family = 6;
options.hints = dns.V4MAPPED;
}
return cache.lookup(host, options, callback);
};
/**
* Get http non-proxy agent
*/
const _http = new http.Agent({
keepAlive: true,
keepAliveMsecs: 30 * SECOND,
lookup: cache.lookup,
lookup: cacheLookup,
} as http.AgentOptions);
/**
@ -93,7 +119,7 @@ const _http = new http.Agent({
const _https = new https.Agent({
keepAlive: true,
keepAliveMsecs: 30 * SECOND,
lookup: cache.lookup,
lookup: cacheLookup,
} as https.AgentOptions);
const maxSockets = Math.max(256, config.deliverJobConcurrency);