119 lines
3.2 KiB
TypeScript
119 lines
3.2 KiB
TypeScript
import crypto from "node:crypto";
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import { createWriteStream } from "node:fs";
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import fs from "node:fs/promises";
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import { request } from "node:https";
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import os from "node:os";
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import path from "node:path";
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import { pipeline } from "node:stream/promises";
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const MEDIA_DIR = path.join(os.homedir(), ".warelay", "media");
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const MAX_BYTES = 5 * 1024 * 1024; // 5MB
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const DEFAULT_TTL_MS = 2 * 60 * 1000; // 2 minutes
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export function getMediaDir() {
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return MEDIA_DIR;
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}
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export async function ensureMediaDir() {
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await fs.mkdir(MEDIA_DIR, { recursive: true });
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return MEDIA_DIR;
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}
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export async function cleanOldMedia(ttlMs = DEFAULT_TTL_MS) {
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await ensureMediaDir();
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const entries = await fs.readdir(MEDIA_DIR).catch(() => []);
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const now = Date.now();
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await Promise.all(
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entries.map(async (file) => {
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const full = path.join(MEDIA_DIR, file);
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const stat = await fs.stat(full).catch(() => null);
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if (!stat) return;
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if (now - stat.mtimeMs > ttlMs) {
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await fs.rm(full).catch(() => {});
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}
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}),
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);
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}
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function looksLikeUrl(src: string) {
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return /^https?:\/\//i.test(src);
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}
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async function downloadToFile(
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url: string,
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dest: string,
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headers?: Record<string, string>,
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) {
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await new Promise<void>((resolve, reject) => {
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const req = request(url, { headers }, (res) => {
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if (!res.statusCode || res.statusCode >= 400) {
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reject(new Error(`HTTP ${res.statusCode ?? "?"} downloading media`));
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return;
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}
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let total = 0;
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const out = createWriteStream(dest);
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res.on("data", (chunk) => {
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total += chunk.length;
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if (total > MAX_BYTES) {
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req.destroy(new Error("Media exceeds 5MB limit"));
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}
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});
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pipeline(res, out)
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.then(() => resolve())
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.catch(reject);
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});
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req.on("error", reject);
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req.end();
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});
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}
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export type SavedMedia = {
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id: string;
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path: string;
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size: number;
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contentType?: string;
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};
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export async function saveMediaSource(
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source: string,
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headers?: Record<string, string>,
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subdir = "",
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): Promise<SavedMedia> {
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const dir = subdir ? path.join(MEDIA_DIR, subdir) : MEDIA_DIR;
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await fs.mkdir(dir, { recursive: true });
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await cleanOldMedia();
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const id = crypto.randomUUID();
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const dest = path.join(dir, id);
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if (looksLikeUrl(source)) {
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await downloadToFile(source, dest, headers);
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const stat = await fs.stat(dest);
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return { id, path: dest, size: stat.size };
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}
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// local path
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const stat = await fs.stat(source);
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if (!stat.isFile()) {
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throw new Error("Media path is not a file");
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}
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if (stat.size > MAX_BYTES) {
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throw new Error("Media exceeds 5MB limit");
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}
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await fs.copyFile(source, dest);
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return { id, path: dest, size: stat.size };
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}
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export async function saveMediaBuffer(
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buffer: Buffer,
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contentType?: string,
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subdir = "inbound",
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): Promise<SavedMedia> {
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if (buffer.byteLength > MAX_BYTES) {
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throw new Error("Media exceeds 5MB limit");
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}
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const dir = path.join(MEDIA_DIR, subdir);
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await fs.mkdir(dir, { recursive: true });
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const id = crypto.randomUUID();
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const dest = path.join(dir, id);
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await fs.writeFile(dest, buffer);
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return { id, path: dest, size: buffer.byteLength, contentType };
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}
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