After investing a considerable amount of time into this task, I'm uncertain about its feasibility: Creating a reverse lookup of IP addresses and logging it through morgan
Express.use(Morgan(async(tokens, req, res) => {
async function ip_reverse_lookup(ip) {
return hostnames = await dns.reverse(ip)
}
hostnames = await ip_reverse_lookup(ip)
return hostnames
}
However, the current output in the console displays [object Promise] when using morgan
Attempting to unwrap a Promise from mortan.token proved to be a challenge for me.
To overcome this, I created an async function, stored the necessary value in req, and utilized it within morgan.token.
app.use(async function handleDnsLookupByIp (req, next){
const dnsResult = await dns.reverse(ip);
req.dns = dnsResult;
next();
})
app.use(morgan(...));
morgan.token("dns", (req) => req.dns || "");
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