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refactor(net): share hostname normalization

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This commit is contained in:
Peter Steinberger
2026-02-16 01:01:22 +00:00
parent d5ee766afe
commit 4aaafe5322
3 changed files with 9 additions and 16 deletions
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7
src/infra/net/hostname.ts Normal file
View File

@@ -0,0 +1,7 @@
export function normalizeHostname(hostname: string): string {
const normalized = hostname.trim().toLowerCase().replace(/\.$/, "");
if (normalized.startsWith("[") && normalized.endsWith("]")) {
return normalized.slice(1, -1);
}
return normalized;
}

9
src/infra/net/ssrf.ts
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@@ -1,6 +1,7 @@
import { lookup as dnsLookupCb, type LookupAddress } from "node:dns"; import { lookup as dnsLookupCb, type LookupAddress } from "node:dns";
import { lookup as dnsLookup } from "node:dns/promises"; import { lookup as dnsLookup } from "node:dns/promises";
import { Agent, type Dispatcher } from "undici"; import { Agent, type Dispatcher } from "undici";
import { normalizeHostname } from "./hostname.js";
type LookupCallback = ( type LookupCallback = (
err: NodeJS.ErrnoException | null, err: NodeJS.ErrnoException | null,
@@ -25,14 +26,6 @@ export type SsrFPolicy = {
const BLOCKED_HOSTNAMES = new Set(["localhost", "metadata.google.internal"]); const BLOCKED_HOSTNAMES = new Set(["localhost", "metadata.google.internal"]);
function normalizeHostname(hostname: string): string {
const normalized = hostname.trim().toLowerCase().replace(/\.$/, "");
if (normalized.startsWith("[") && normalized.endsWith("]")) {
return normalized.slice(1, -1);
}
return normalized;
}
function normalizeHostnameSet(values?: string[]): Set<string> { function normalizeHostnameSet(values?: string[]): Set<string> {
if (!values || values.length === 0) { if (!values || values.length === 0) {
return new Set<string>(); return new Set<string>();

9
src/slack/monitor/media.ts
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@@ -1,17 +1,10 @@
import type { WebClient as SlackWebClient } from "@slack/web-api"; import type { WebClient as SlackWebClient } from "@slack/web-api";
import type { FetchLike } from "../../media/fetch.js"; import type { FetchLike } from "../../media/fetch.js";
import type { SlackFile } from "../types.js"; import type { SlackFile } from "../types.js";
import { normalizeHostname } from "../../infra/net/hostname.js";
import { fetchRemoteMedia } from "../../media/fetch.js"; import { fetchRemoteMedia } from "../../media/fetch.js";
import { saveMediaBuffer } from "../../media/store.js"; import { saveMediaBuffer } from "../../media/store.js";
function normalizeHostname(hostname: string): string {
const normalized = hostname.trim().toLowerCase().replace(/\.$/, "");
if (normalized.startsWith("[") && normalized.endsWith("]")) {
return normalized.slice(1, -1);
}
return normalized;
}
function isSlackHostname(hostname: string): boolean { function isSlackHostname(hostname: string): boolean {
const normalized = normalizeHostname(hostname); const normalized = normalizeHostname(hostname);
if (!normalized) { if (!normalized) {