From d7b502bab3012ffac2369799e3ce288990a845a3 Mon Sep 17 00:00:00 2001 From: Server <10.9.8.204@example.com> Date: Wed, 21 Oct 2026 12:54:38 +0000 Subject: [PATCH] Add minimal file sharing app with install and run scripts --- .gitignore | 6 + README.md | 21 ++ install.sh | 50 +++ package-lock.json | 878 ++++++++++++++++++++++++++++++++++++++++++++++ package.json | 21 ++ public/index.html | 29 ++ run.sh | 5 + server.js | 91 +++++ 8 files changed, 1101 insertions(+) create mode 100644 .gitignore create mode 100644 README.md create mode 100755 install.sh create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 public/index.html create mode 100755 run.sh create mode 100644 server.js diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..7b8dbd8 --- /dev/null +++ b/.gitignore @@ -0,0 +1,6 @@ +node_modules/ +data/ +.passwd +.runtime/ +qa-*.png +qa.cjs diff --git a/README.md b/README.md new file mode 100644 index 0000000..695950e --- /dev/null +++ b/README.md @@ -0,0 +1,21 @@ +# Drop + +Minimal password-protected file sharing. Upload one file up to 4 GiB, choose its lifetime in days, and copy a direct five-character link. Links accept either letter case. Images display inline; other files download with their original names. Expired files are deleted automatically. + +```sh +./install.sh +cat .passwd +./run.sh +``` + +The installer uses an existing Node.js >=22.13 with npm, or downloads Node.js 24.18.0 into `.runtime/node` on Linux/macOS x64/arm64. It installs backend dependencies from `package-lock.json` and creates a random `.passwd` only when that file does not exist. TypeScript and tsx are not needed; the backend is plain JavaScript. + +The server listens on `127.0.0.1:8787`. Put a reverse proxy in front of it for public access, for example: + +```caddyfile +http://drop.example.com { + reverse_proxy 127.0.0.1:8787 +} +``` + +Keep the project directory writable. Uploaded files and SQLite metadata live in `data/`. `.passwd`, `data/`, dependencies and the local Node runtime are excluded from Git. Edit `.passwd` to change the password; existing sessions will be invalidated. diff --git a/install.sh b/install.sh new file mode 100755 index 0000000..1a50a6e --- /dev/null +++ b/install.sh @@ -0,0 +1,50 @@ +#!/usr/bin/env bash +set -euo pipefail +cd -- "$(dirname -- "${BASH_SOURCE[0]}")" +export PATH="$PWD/.runtime/node/bin:$PATH" + +if ! command -v node >/dev/null 2>&1 || ! node -e 'const [major, minor] = process.versions.node.split(".").map(Number); if (major < 22 || major === 22 && minor < 13) process.exit(1); require("node:sqlite")' >/dev/null 2>&1 || ! command -v npm >/dev/null 2>&1; then + missing=() + for tool in curl tar sha256sum; do + command -v "$tool" >/dev/null 2>&1 || missing+=("$tool") + done + if ((${#missing[@]})); then + if command -v apt-get >/dev/null 2>&1; then + runner=() + if [[ $(id -u) != 0 ]]; then + command -v sudo >/dev/null 2>&1 || { echo 'Install curl, tar and coreutils, then rerun install.sh.' >&2; exit 1; } + runner=(sudo) + fi + "${runner[@]}" apt-get update + "${runner[@]}" apt-get install -y curl ca-certificates tar coreutils + else + echo 'Install curl, tar and coreutils, then rerun install.sh.' >&2 + exit 1 + fi + fi + case "$(uname -s)" in Linux) platform=linux ;; Darwin) platform=darwin ;; *) echo 'Install Node.js >=22.13 with npm manually.' >&2; exit 1 ;; esac + case "$(uname -m)" in x86_64|amd64) arch=x64 ;; aarch64|arm64) arch=arm64 ;; *) echo 'Install Node.js >=22.13 with npm manually.' >&2; exit 1 ;; esac + version=v24.18.0 + archive="node-$version-$platform-$arch.tar.gz" + base="https://nodejs.org/dist/$version" + temp_dir=$(mktemp -d) + trap 'rm -rf -- "$temp_dir"' EXIT + curl --fail --silent --show-error --location "$base/$archive" -o "$temp_dir/$archive" + curl --fail --silent --show-error --location "$base/SHASUMS256.txt" -o "$temp_dir/SHASUMS256.txt" + (cd "$temp_dir"; awk -v file="$archive" '$2 == file { print; found=1 } END { if (!found) exit 1 }' SHASUMS256.txt > checksum; sha256sum -c checksum) + mkdir -p .runtime + tar -xzf "$temp_dir/$archive" -C .runtime + rm -rf .runtime/node + mv ".runtime/node-$version-$platform-$arch" .runtime/node +fi + +npm ci --omit=dev --no-audit --no-fund +node - <<'JS' +const fs = require('node:fs'); +fs.mkdirSync('data', { recursive: true }); +if (!fs.existsSync('.passwd')) { + fs.writeFileSync('.passwd', require('node:crypto').randomBytes(15).toString('base64url') + '\n', { flag: 'wx', mode: 0o600 }); + console.log('Created .passwd. Read or edit it to set the login password.'); +} +JS +printf 'Installed. 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file mode 100644 index 0000000..73ed972 --- /dev/null +++ b/public/index.html @@ -0,0 +1,29 @@ + +Drop + +
+ + + +
+ diff --git a/run.sh b/run.sh new file mode 100755 index 0000000..2a36b09 --- /dev/null +++ b/run.sh @@ -0,0 +1,5 @@ +#!/usr/bin/env bash +set -euo pipefail +cd -- "$(dirname -- "${BASH_SOURCE[0]}")" +export PATH="$PWD/.runtime/node/bin:$PATH" +exec node server.js diff --git a/server.js b/server.js new file mode 100644 index 0000000..559c4c1 --- /dev/null +++ b/server.js @@ -0,0 +1,91 @@ +const express = require('express'); +const Busboy = require('busboy'); +const { DatabaseSync } = require('node:sqlite'); +const { randomBytes, randomInt, createHmac, timingSafeEqual } = require('node:crypto'); +const fs = require('node:fs'); +const path = require('node:path'); +const { pipeline } = require('node:stream/promises'); +const ROOT = __dirname, DATA = path.join(ROOT, 'data'); +const MAX = 4 * 1024 ** 3; +fs.mkdirSync(DATA, { recursive: true }); +const db = new DatabaseSync(path.join(DATA, 'files.sqlite')); +db.exec('CREATE TABLE IF NOT EXISTS files (id TEXT PRIMARY KEY, name TEXT, mime TEXT, expires INTEGER)'); +const app = express(); +app.disable('x-powered-by'); +app.set('trust proxy', 'loopback'); +app.use(express.json({ limit: '4kb' })); +const password = () => fs.readFileSync(path.join(ROOT, '.passwd'), 'utf8').trim(); +const digest = s => createHmac('sha256', password()).update(s).digest('hex'); +function authenticated(req) { + const token = (req.headers.cookie || '').split(';').map(s => s.trim()).find(s => s.startsWith('session='))?.slice(8); + if (!token) return false; + const [expires, signature] = token.split('.'); + return Number(expires) > Date.now() && signature?.length === 64 && timingSafeEqual(Buffer.from(signature), Buffer.from(digest(expires))); +} +app.post('/api/login', (req, res) => { + const given = createHmac('sha256', 'compare').update(String(req.body.password || '')).digest(); + const expected = createHmac('sha256', 'compare').update(password()).digest(); + if (!timingSafeEqual(given, expected)) return res.status(401).json({ error: 'Неверный пароль' }); + const expires = String(Date.now() + 7 * 86400000); + res.setHeader('Set-Cookie', `session=${expires}.${digest(expires)}; HttpOnly; SameSite=Strict; Path=/; Max-Age=604800${req.secure ? '; Secure' : ''}`); + res.json({ ok: true }); +}); +app.get('/api/session', (req, res) => { res.set('Cache-Control', 'no-store').json({ authenticated: authenticated(req) }); }); +app.post('/api/upload', async (req, res) => { + if (!authenticated(req)) return res.status(401).json({ error: 'Введите пароль заново' }); + if (req.headers['sec-fetch-site'] === 'cross-site') return res.sendStatus(403); + const days = Number(req.query.days); + if (!Number.isSafeInteger(days) || days < 1 || days > 3650) return res.status(400).json({ error: 'Укажите от 1 до 3650 дней' }); + const alphabet = 'abcdefghijklmnopqrstuvwxyz0123456789'; + let id; + do { id = Array.from({ length: 5 }, () => alphabet[randomInt(36)]).join(''); } + while (fs.existsSync(path.join(DATA, id)) || db.prepare('SELECT id FROM files WHERE id = ?').get(id)); + const target = path.join(DATA, id); + fs.writeFileSync(target, '', { flag: 'wx', mode: 0o600 }); + let name, mime, task, invalid = false, count = 0; + try { + const parser = Busboy({ headers: req.headers, defParamCharset: 'utf8', limits: { fileSize: MAX, files: 1, fields: 0, parts: 2 } }); + parser.on('file', (_, stream, info) => { + count++; + name = path.basename(info.filename.replace(/\\/g, '/')).replace(/[\x00-\x1f\x7f]/g, '') || 'file'; + mime = info.mimeType; + stream.on('limit', () => { invalid = true; }); + task = pipeline(stream, fs.createWriteStream(target, { flags: 'w', mode: 0o600 })); + task.catch(() => {}); + }); + parser.on('fieldsLimit', () => { invalid = true; }); + parser.on('partsLimit', () => { invalid = true; }); + parser.on('filesLimit', () => { invalid = true; }); + await pipeline(req, parser); + if (task) await task; + if (invalid || count !== 1) throw new Error('Выберите один файл до 4 ГБ'); + const expires = Date.now() + days * 86400000; + db.prepare('INSERT INTO files VALUES (?, ?, ?, ?)').run(id, name, mime, expires); + res.json({ path: `/${id}`, expires }); + } catch (error) { + if (task) await task.catch(() => {}); + fs.rmSync(target, { force: true }); + if (!res.headersSent && !res.destroyed) res.status(400).json({ error: invalid ? 'Максимальный размер 4 ГБ' : 'Не удалось загрузить файл' }); + } +}); +app.get('/:id', (req, res, next) => { + if (!/^[a-z0-9]{5}$/i.test(req.params.id)) return next(); + const file = db.prepare('SELECT * FROM files WHERE id = ?').get(req.params.id.toLowerCase()); + if (!file || file.expires <= Date.now()) return res.status(404).send('Файл не найден или срок ссылки истёк'); + const inline = new Set(['image/png', 'image/jpeg', 'image/gif', 'image/webp', 'image/avif', 'image/bmp', 'image/x-icon']); + res.set({ 'Content-Type': inline.has(file.mime) ? file.mime : 'application/octet-stream', 'X-Content-Type-Options': 'nosniff', 'Cache-Control': 'no-store', 'Content-Disposition': `${inline.has(file.mime) ? 'inline' : 'attachment'}; filename="download"; filename*=UTF-8''${encodeURIComponent(file.name).replace(/['()*]/g, c => '%' + c.charCodeAt(0).toString(16))}` }); + res.sendFile(path.join(DATA, file.id)); +}); +app.use(express.static(path.join(ROOT, 'public'), { dotfiles: 'deny' })); +function cleanup() { + for (const file of db.prepare('SELECT id FROM files WHERE expires <= ?').all(Date.now())) { + fs.rmSync(path.join(DATA, file.id), { force: true }); + db.prepare('DELETE FROM files WHERE id = ?').run(file.id); + } + for (const name of fs.readdirSync(DATA)) { + if (/^(?:[a-z0-9]{5}|[a-f0-9]{48})$/.test(name) && fs.statSync(path.join(DATA, name)).mtimeMs < Date.now() - 86400000 && !db.prepare('SELECT id FROM files WHERE id = ?').get(name)) fs.rmSync(path.join(DATA, name), { force: true }); + } +} +cleanup(); +setInterval(cleanup, 60000).unref(); +app.listen(8787, '127.0.0.1', () => console.log('Filedrop listening on 8787'));