Daniel Maksymilian Syrnicki
e6f52ada5c
Phase 1 of updates. User clicks Update on an installed app row →
the resource manager runs `docker compose pull`, compares the
running container's image ID to the just-pulled local image ID
per service, and only runs `docker compose up -d` if something
actually changed. Response is {updated: bool, services: [{service,
from, to, tag}]} so the UI can tell the user what happened.
Deliberately small: no pinning, no background checks, no "update
all" button, no version/changelog display. The update flow doesn't
mutate the compose file — it just acts on what's already there.
Reinstall still serves as rollback.
New dockerops helpers: compose_pull, compose_image_tags (parses
`docker compose config --format json`), local_image_id (via
`docker image inspect`), running_container_image_id (via compose
ps --quiet + docker inspect). Six new tests cover the endpoint:
not installed, no changes, changes applied, service not running,
docker pull error, and the HTTP route end-to-end.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
622 lines
23 KiB
Python
622 lines
23 KiB
Python
# ruff: noqa: E501 — _HTML below is a literal HTML/CSS/JS payload; wrapping
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# its lines hurts readability and the rendered output is what matters here.
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"""Tiny HTTP API + management UI for the Furtka resource manager.
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Single stdlib http.server process, no Flask/no third-party deps so we don't
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have to pip-install anything on the target. Caddy reverse-proxies /apps and
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/api from :80 to here.
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Security: NO AUTH. Bound to 127.0.0.1 by default; the Caddy proxy makes it
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LAN-reachable. Anyone on the LAN can install/remove apps. The UI shouts this
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out at the top. Auth lands when Authentik does.
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"""
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import json
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import re
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from http.server import BaseHTTPRequestHandler, HTTPServer
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from furtka import dockerops, installer, reconciler
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from furtka.manifest import ManifestError, load_manifest
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from furtka.paths import apps_dir, bundled_apps_dir
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from furtka.scanner import scan
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_ICON_MAX_BYTES = 16 * 1024
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_UNSAFE_SVG_PATTERNS = (
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re.compile(r"<script", re.IGNORECASE),
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re.compile(r"javascript:", re.IGNORECASE),
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re.compile(r"\bon[a-z]+\s*=", re.IGNORECASE),
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)
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def _read_icon_svg(app_dir, icon_name):
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"""Return an SVG string safe to inline into the /apps response, or None.
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Inlined rather than served via a separate endpoint so the /apps page
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renders in one round-trip (Doherty Threshold). The trust model: icons
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come from bundled apps we ship in the ISO or from apps the operator
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installed via the (auth-less-by-design) API — so the realistic threat
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is a malformed file, not an attacker. Filter the obvious script /
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event-handler vectors for defense in depth and let the browser render
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the rest.
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"""
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if not app_dir or not icon_name:
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return None
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path = app_dir / icon_name
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try:
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if not path.is_file() or path.stat().st_size > _ICON_MAX_BYTES:
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return None
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data = path.read_text(encoding="utf-8")
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except OSError:
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return None
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data = data.strip()
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if data.startswith("<?xml"):
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end = data.find("?>")
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if end == -1:
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return None
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data = data[end + 2 :].lstrip()
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if not data.startswith("<svg"):
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return None
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if any(p.search(data) for p in _UNSAFE_SVG_PATTERNS):
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return None
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return data
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_HTML = """<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Furtka Apps</title>
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<link rel="stylesheet" href="/style.css">
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</head>
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<body>
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<main class="wrap">
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<nav class="nav">
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<a class="brand" href="/">Furtka</a>
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<div class="nav-links">
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<a href="/">Home</a>
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<a href="/apps" aria-current="page">Apps</a>
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<a href="/settings/">Settings</a>
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</div>
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</nav>
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<h1>Furtka Apps</h1>
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<p class="lede">Install or remove resource-manager apps on this Furtka box.</p>
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<div class="warn">No authentication on this UI yet. Anyone on your LAN can install or remove apps. Don't expose this to the wider internet.</div>
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<h2>Installed</h2>
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<div id="installed"></div>
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<h2>Available to install</h2>
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<div id="available"></div>
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<details class="log-details">
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<summary>Last action</summary>
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<pre id="log">(none yet)</pre>
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</details>
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</main>
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<div id="modal-backdrop" class="modal-backdrop" role="dialog" aria-modal="true">
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<div class="modal">
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<h3 id="modal-title"></h3>
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<div id="modal-long" class="long"></div>
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<div id="modal-error" class="error"></div>
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<form id="modal-form" onsubmit="return false;"></form>
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<div class="modal-actions">
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<button type="button" class="secondary" id="modal-cancel">Cancel</button>
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<button type="button" id="modal-submit">Install</button>
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</div>
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</div>
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</div>
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<script>
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function esc(s) {
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const d = document.createElement('div');
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d.textContent = s == null ? '' : String(s);
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return d.innerHTML;
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}
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// Fallback when an app doesn't ship a parseable icon.svg. Simple
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// stroked folder — currentColor so the tile's accent tint applies.
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const FALLBACK_ICON = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M3 7v12a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2h-7l-2-2H5a2 2 0 0 0-2 2z"/></svg>';
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function appIcon(a) {
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// `a.icon_svg` is already sanitized server-side (see _read_icon_svg).
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return `<div class="app-icon">${a.icon_svg || FALLBACK_ICON}</div>`;
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}
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const modal = {
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backdrop: document.getElementById('modal-backdrop'),
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title: document.getElementById('modal-title'),
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long: document.getElementById('modal-long'),
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form: document.getElementById('modal-form'),
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error: document.getElementById('modal-error'),
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submit: document.getElementById('modal-submit'),
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cancel: document.getElementById('modal-cancel'),
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current: null, // { name, action: 'install' | 'edit' }
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};
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modal.cancel.addEventListener('click', () => closeModal());
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modal.backdrop.addEventListener('click', (e) => { if (e.target === modal.backdrop) closeModal(); });
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document.addEventListener('keydown', (e) => { if (e.key === 'Escape') closeModal(); });
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function closeModal() {
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modal.backdrop.classList.remove('open');
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modal.form.innerHTML = '';
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modal.error.classList.remove('show');
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modal.error.textContent = '';
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modal.current = null;
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}
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async function openSettingsDialog(name, action) {
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const r = await fetch(`/api/apps/${encodeURIComponent(name)}/settings`);
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if (!r.ok) {
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document.getElementById('log').textContent =
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`[settings ${name}] HTTP ${r.status}\\n` + await r.text();
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return;
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}
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const data = await r.json();
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modal.current = { name, action };
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modal.title.textContent = data.display_name || data.name;
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modal.long.textContent = data.description_long || data.description || '';
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modal.long.style.display = modal.long.textContent ? '' : 'none';
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modal.submit.textContent = action === 'install' ? 'Install' : 'Save and restart';
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if (!data.settings.length) {
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// No form fields — treat as simple confirm.
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modal.form.innerHTML = '<p class="hint">No settings to configure.</p>';
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} else {
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modal.form.innerHTML = data.settings.map(s => {
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const id = `field-${esc(s.name)}`;
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const value = action === 'edit' && s.type === 'password' ? '' : esc(s.value || '');
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const placeholder = action === 'edit' && s.type === 'password' ? 'Leave blank to keep current' : '';
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return `
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<div class="field">
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<label for="${id}">${esc(s.label)}${s.required ? '<span class="req">*</span>' : ''}</label>
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${s.description ? `<div class="hint">${esc(s.description)}</div>` : ''}
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<input
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id="${id}"
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name="${esc(s.name)}"
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type="${s.type === 'password' ? 'password' : s.type === 'number' ? 'number' : 'text'}"
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value="${value}"
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placeholder="${esc(placeholder)}"
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${s.required && action === 'install' ? 'required' : ''}
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autocomplete="off"
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spellcheck="false">
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</div>`;
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}).join('');
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}
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modal.backdrop.classList.add('open');
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const first = modal.form.querySelector('input');
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if (first) first.focus();
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}
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modal.submit.addEventListener('click', submitModal);
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async function submitModal() {
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if (!modal.current) return;
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const { name, action } = modal.current;
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const values = {};
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for (const input of modal.form.querySelectorAll('input')) {
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// In edit mode, skip password fields left blank — server keeps existing.
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if (action === 'edit' && input.type === 'password' && input.value === '') continue;
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values[input.name] = input.value;
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}
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modal.submit.disabled = true;
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const original = modal.submit.textContent;
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modal.submit.textContent = action === 'install' ? 'Installing…' : 'Saving…';
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modal.error.classList.remove('show');
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try {
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const url = action === 'install'
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? '/api/apps/install'
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: `/api/apps/${encodeURIComponent(name)}/settings`;
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const body = action === 'install' ? { name, settings: values } : { settings: values };
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const r = await fetch(url, {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify(body),
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});
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const data = await r.json();
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document.getElementById('log').textContent =
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`[${action} ${name}] HTTP ${r.status}\\n` + JSON.stringify(data, null, 2);
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if (!r.ok) {
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modal.error.textContent = data.error || `HTTP ${r.status}`;
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modal.error.classList.add('show');
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modal.submit.disabled = false;
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modal.submit.textContent = original;
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return;
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}
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closeModal();
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await refresh();
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} catch (e) {
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modal.error.textContent = `Network error: ${e.message}`;
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modal.error.classList.add('show');
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modal.submit.disabled = false;
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modal.submit.textContent = original;
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}
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}
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async function refresh() {
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const [installed, available] = await Promise.all([
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fetch('/api/apps').then(r => r.json()),
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fetch('/api/bundled').then(r => r.json()),
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]);
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document.getElementById('installed').innerHTML = installed.length
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? installed.map(a => {
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const hasSettings = a.has_settings;
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return `
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<div class="app">
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<div class="left">
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${appIcon(a)}
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<div class="meta">
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<span class="name">${esc(a.display_name || a.name)} <small>${esc(a.version || '')}</small></span>
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<span class="desc">${esc(a.description || a.error || '')}</span>
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</div>
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</div>
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<div class="buttons">
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${hasSettings ? `<button data-op="edit" data-name="${esc(a.name)}">Settings</button>` : ''}
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<button class="secondary" data-op="update" data-name="${esc(a.name)}">Update</button>
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<button class="secondary" data-op="reinstall" data-name="${esc(a.name)}">Reinstall</button>
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<button class="danger" data-op="remove" data-name="${esc(a.name)}">Remove</button>
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</div>
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</div>`;
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}).join('')
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: '<div class="empty">No apps installed yet.</div>';
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document.getElementById('available').innerHTML = available.length
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? available.map(a => `
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<div class="app">
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<div class="left">
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${appIcon(a)}
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<div class="meta">
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<span class="name">${esc(a.display_name || a.name)} <small>${esc(a.version || '')}</small></span>
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<span class="desc">${esc(a.description || '')}</span>
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</div>
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</div>
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<button data-op="install" data-name="${esc(a.name)}">Install</button>
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</div>`).join('')
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: '<div class="empty">No bundled apps left to install.</div>';
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for (const btn of document.querySelectorAll('button[data-op]')) {
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btn.addEventListener('click', () => handleButton(btn.dataset.op, btn.dataset.name, btn));
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}
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}
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async function handleButton(op, name, btn) {
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if (op === 'install' || op === 'edit') {
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openSettingsDialog(name, op === 'install' ? 'install' : 'edit');
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return;
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}
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// Reinstall + update + remove are direct actions, no form.
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btn.disabled = true;
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const original = btn.textContent;
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const labels = { reinstall: 'Reinstalling…', update: 'Checking…', remove: 'Removing…' };
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btn.textContent = labels[op] || 'Working…';
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try {
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const urls = {
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reinstall: '/api/apps/install',
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remove: '/api/apps/remove',
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update: `/api/apps/${encodeURIComponent(name)}/update`,
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};
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const r = await fetch(urls[op], {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({name}),
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});
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const data = await r.json();
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let header = `[${op} ${name}] HTTP ${r.status}`;
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if (op === 'update' && r.ok) {
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header += data.updated
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? ` — updated ${data.services.length} service(s)`
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: ' — already up to date';
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}
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document.getElementById('log').textContent = header + '\\n' + JSON.stringify(data, null, 2);
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} catch (e) {
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document.getElementById('log').textContent = `[${op} ${name}] network error: ${e.message}`;
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}
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btn.textContent = original;
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await refresh();
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}
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refresh();
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</script>
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</body>
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</html>
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"""
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def _manifest_summary(m, app_dir=None):
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return {
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"name": m.name,
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"display_name": m.display_name,
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"version": m.version,
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"description": m.description,
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"description_long": m.description_long,
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"ports": list(m.ports),
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"icon": m.icon,
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"icon_svg": _read_icon_svg(app_dir, m.icon),
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"has_settings": bool(m.settings),
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}
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def _list_installed():
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out = []
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for r in scan(apps_dir()):
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if r.ok:
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d = _manifest_summary(r.manifest, r.path)
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d["ok"] = True
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out.append(d)
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else:
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out.append({"name": r.path.name, "ok": False, "error": r.error})
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return out
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def _list_bundled():
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installed_names = {r.path.name for r in scan(apps_dir()) if r.ok}
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bundled = bundled_apps_dir()
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if not bundled.exists():
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return []
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out = []
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for entry in sorted(bundled.iterdir()):
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if not entry.is_dir() or entry.name in installed_names:
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continue
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manifest_path = entry / "manifest.json"
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if not manifest_path.exists():
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continue
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try:
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m = load_manifest(manifest_path)
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except ManifestError:
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continue
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out.append(_manifest_summary(m, entry))
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return out
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def _load_manifest_for(name):
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"""Return (manifest, env_values, installed_bool) for an installed or bundled app.
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Returns (None, None, False) if the name doesn't resolve anywhere.
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"""
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target = apps_dir() / name
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if target.exists() and (target / "manifest.json").exists():
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try:
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m = load_manifest(target / "manifest.json")
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except ManifestError:
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return None, None, False
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values = installer.read_env_values(target / ".env")
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return m, values, True
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bundled = bundled_apps_dir() / name
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if bundled.exists() and (bundled / "manifest.json").exists():
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try:
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m = load_manifest(bundled / "manifest.json")
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except ManifestError:
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return None, None, False
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env_example = bundled / ".env.example"
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values = installer.read_env_values(env_example) if env_example.exists() else {}
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return m, values, False
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return None, None, False
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def _do_get_settings(name):
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m, values, installed = _load_manifest_for(name)
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if m is None:
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return 404, {"error": f"{name!r} not found"}
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settings_out = []
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for s in m.settings:
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# Never return password values back to the client — user either keeps
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# the current value (blank input means "don't change") or types a new one.
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if s.type == "password":
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current = ""
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else:
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current = values.get(s.name, s.default if s.default is not None else "")
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settings_out.append(
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{
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"name": s.name,
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"label": s.label,
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"description": s.description,
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"type": s.type,
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"required": s.required,
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"default": s.default,
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"value": current,
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}
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)
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return 200, {
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"name": m.name,
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"display_name": m.display_name,
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"description": m.description,
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"description_long": m.description_long,
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"installed": installed,
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"settings": settings_out,
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}
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def _do_install(name, settings=None):
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try:
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src = installer.resolve_source(name)
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target = installer.install_from(src, settings=settings)
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except installer.InstallError as e:
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return 400, {"error": str(e)}
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actions = reconciler.reconcile(apps_dir())
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payload = {
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"installed": str(target),
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"actions": [{"kind": a.kind, "target": a.target, "detail": a.detail} for a in actions],
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}
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# 207 Multi-Status — install copy succeeded but reconcile had per-app errors.
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return (207 if reconciler.has_errors(actions) else 200, payload)
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def _do_update_settings(name, settings):
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"""Write settings into an installed app's .env and kick off a reinstall.
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Only works for already-installed apps — use /api/apps/install for fresh
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installs (since bundled-app folders under /opt/... are read-only).
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"""
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target = apps_dir() / name
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if not target.exists():
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return 404, {"error": f"{name!r} is not installed"}
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try:
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installer.update_env(name, settings)
|
|
except installer.InstallError as e:
|
|
return 400, {"error": str(e)}
|
|
actions = reconciler.reconcile(apps_dir())
|
|
return (
|
|
207 if reconciler.has_errors(actions) else 200,
|
|
{
|
|
"updated": name,
|
|
"actions": [{"kind": a.kind, "target": a.target, "detail": a.detail} for a in actions],
|
|
},
|
|
)
|
|
|
|
|
|
def _do_remove(name):
|
|
target = apps_dir() / name
|
|
if not target.exists():
|
|
return 404, {"error": f"{name!r} is not installed"}
|
|
compose_warning = None
|
|
try:
|
|
dockerops.compose_down(target, name)
|
|
except dockerops.DockerError as e:
|
|
compose_warning = str(e)
|
|
try:
|
|
installer.remove(name)
|
|
except installer.InstallError as e:
|
|
return 500, {"error": str(e)}
|
|
return 200, {"removed": name, "compose_warning": compose_warning}
|
|
|
|
|
|
def _do_update(name):
|
|
"""Pull newer container images for an installed app; restart if any changed.
|
|
|
|
Behaviour:
|
|
- 404 if the app isn't installed.
|
|
- Always runs `docker compose pull` first (cheap no-op when nothing to
|
|
fetch, touches the network).
|
|
- For each service, compares the container's running image ID against
|
|
the post-pull local image ID. If a service's image advanced, runs
|
|
`docker compose up -d` so compose recreates the affected containers
|
|
in place.
|
|
- Returns {updated: bool, services: [{service, from, to}], ...}.
|
|
"""
|
|
target = apps_dir() / name
|
|
if not target.exists():
|
|
return 404, {"error": f"{name!r} is not installed"}
|
|
try:
|
|
dockerops.compose_pull(target, name)
|
|
tags = dockerops.compose_image_tags(target, name)
|
|
changes = []
|
|
for service, tag in tags.items():
|
|
running = dockerops.running_container_image_id(target, name, service)
|
|
local = dockerops.local_image_id(tag)
|
|
if running and local and running != local:
|
|
changes.append({"service": service, "from": running, "to": local, "tag": tag})
|
|
if changes:
|
|
dockerops.compose_up(target, name)
|
|
except dockerops.DockerError as e:
|
|
return 502, {"error": str(e)}
|
|
return 200, {"app": name, "updated": bool(changes), "services": changes}
|
|
|
|
|
|
def _parse_settings_body(payload):
|
|
"""Extract and coerce the settings dict from a JSON body. Returns dict or None."""
|
|
s = payload.get("settings")
|
|
if s is None:
|
|
return None
|
|
if not isinstance(s, dict):
|
|
return False # sentinel — caller should reject
|
|
out = {}
|
|
for k, v in s.items():
|
|
if not isinstance(k, str):
|
|
return False
|
|
out[k] = "" if v is None else str(v)
|
|
return out
|
|
|
|
|
|
class _Handler(BaseHTTPRequestHandler):
|
|
def _json(self, status, payload):
|
|
body = json.dumps(payload).encode()
|
|
self.send_response(status)
|
|
self.send_header("Content-Type", "application/json")
|
|
self.send_header("Content-Length", str(len(body)))
|
|
self.end_headers()
|
|
self.wfile.write(body)
|
|
|
|
def _html(self, status, body):
|
|
b = body.encode()
|
|
self.send_response(status)
|
|
self.send_header("Content-Type", "text/html; charset=utf-8")
|
|
self.send_header("Content-Length", str(len(b)))
|
|
self.end_headers()
|
|
self.wfile.write(b)
|
|
|
|
def do_GET(self): # noqa: N802 — http.server convention
|
|
if self.path in ("/", "/apps", "/apps/"):
|
|
return self._html(200, _HTML)
|
|
if self.path == "/api/apps":
|
|
return self._json(200, _list_installed())
|
|
if self.path == "/api/bundled":
|
|
return self._json(200, _list_bundled())
|
|
# /api/apps/<name>/settings
|
|
if self.path.startswith("/api/apps/") and self.path.endswith("/settings"):
|
|
name = self.path[len("/api/apps/") : -len("/settings")]
|
|
if "/" in name or not name:
|
|
return self._json(400, {"error": "invalid app name"})
|
|
status, body = _do_get_settings(name)
|
|
return self._json(status, body)
|
|
self._json(404, {"error": "not found"})
|
|
|
|
def do_POST(self): # noqa: N802
|
|
length = int(self.headers.get("Content-Length", "0"))
|
|
raw = self.rfile.read(length) if length else b""
|
|
try:
|
|
payload = json.loads(raw.decode()) if raw else {}
|
|
except (UnicodeDecodeError, json.JSONDecodeError):
|
|
return self._json(400, {"error": "invalid JSON body"})
|
|
if not isinstance(payload, dict):
|
|
return self._json(400, {"error": "body must be a JSON object"})
|
|
|
|
# Per-app settings update: /api/apps/<name>/settings
|
|
if self.path.startswith("/api/apps/") and self.path.endswith("/settings"):
|
|
name = self.path[len("/api/apps/") : -len("/settings")]
|
|
if "/" in name or not name:
|
|
return self._json(400, {"error": "invalid app name"})
|
|
settings = _parse_settings_body(payload)
|
|
if settings is False or settings is None:
|
|
return self._json(400, {"error": "missing or invalid 'settings' object"})
|
|
status, body = _do_update_settings(name, settings)
|
|
return self._json(status, body)
|
|
|
|
# Per-app image update: /api/apps/<name>/update
|
|
if self.path.startswith("/api/apps/") and self.path.endswith("/update"):
|
|
name = self.path[len("/api/apps/") : -len("/update")]
|
|
if "/" in name or not name:
|
|
return self._json(400, {"error": "invalid app name"})
|
|
status, body = _do_update(name)
|
|
return self._json(status, body)
|
|
|
|
name = payload.get("name")
|
|
if not isinstance(name, str) or not name:
|
|
return self._json(400, {"error": "missing or empty 'name' field"})
|
|
|
|
if self.path == "/api/apps/install":
|
|
settings = _parse_settings_body(payload)
|
|
if settings is False:
|
|
return self._json(400, {"error": "'settings' must be an object"})
|
|
status, body = _do_install(name, settings=settings)
|
|
elif self.path == "/api/apps/remove":
|
|
status, body = _do_remove(name)
|
|
else:
|
|
status, body = 404, {"error": "not found"}
|
|
self._json(status, body)
|
|
|
|
def log_message(self, fmt, *args): # noqa: A003
|
|
# Quiet — systemd journal already records the access via Caddy's log.
|
|
pass
|
|
|
|
|
|
def serve(host: str = "127.0.0.1", port: int = 7000) -> None:
|
|
"""Run the API server. Blocks forever; exits on SIGINT/SIGTERM."""
|
|
server = HTTPServer((host, port), _Handler)
|
|
print(f"Furtka API listening on http://{host}:{port}/")
|
|
try:
|
|
server.serve_forever()
|
|
except KeyboardInterrupt:
|
|
pass
|
|
finally:
|
|
server.server_close()
|