fix(abs-guard): audiobooks.franksdank.cloud completes OIDC (forwarded scheme + provider OAuth defaults) #131
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@@ -268,10 +268,11 @@ files.franksdank.cloud {
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# Anubis → Authentik → app, like romm/files. The container carries
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# ROUTER_BASE_PATH=/audiobookshelf, so this vhost serves the app under that
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# path; the bare root is redirected onto it in the post-auth listener, never
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# pre-auth. Guard state in the IdP: proxy provider `abs-proxy`
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# (external_host https://abs.franksdank.cloud/, internal_host http://caddy:8017,
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# application "Audiobookshelf Guard"), claimed by the embedded outpost.
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abs.franksdank.cloud {
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# pre-auth. Guard state in the IdP: proxy provider `audiobooks-proxy`
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# (external_host https://audiobooks.franksdank.cloud/, internal_host
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# http://caddy:8017, application "Audiobookshelf Guard"), claimed by the
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# embedded outpost.
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audiobooks.franksdank.cloud {
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reverse_proxy anubis:8923 {
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header_up X-Real-Ip {remote_host}
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}
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@@ -423,8 +424,8 @@ http://:8017 {
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reverse_proxy 192.168.0.235:3923
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}
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@abs host abs.franksdank.cloud
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handle @abs {
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@audiobooks host audiobooks.franksdank.cloud
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handle @audiobooks {
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# The app answers only under its ROUTER_BASE_PATH; the bare root is a
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# convenience hop, taken post-auth so nothing reaches the app
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# pre-authentication.
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@@ -26,7 +26,7 @@
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192.168.0.143 romm.franksdank.cloud
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192.168.0.143 files.franksdank.cloud
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192.168.0.143 jelly.franksdank.cloud
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192.168.0.143 abs.franksdank.cloud
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192.168.0.143 audiobooks.franksdank.cloud
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192.168.0.143 radarr.franksdank.cloud
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192.168.0.143 lidarr.franksdank.cloud
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192.168.0.143 readarr.franksdank.cloud
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@@ -79,8 +79,8 @@
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# origin, reached directly, which is also what the phone
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# app is configured with)
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# ABS_EXTRA_BASES space-separated additional origins, base path included
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# (default: https://abs.franksdank.cloud/audiobookshelf —
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# the guarded vhost, dankclaw/Caddyfile).
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# (default: https://audiobooks.franksdank.cloud/audiobookshelf
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# — the guarded vhost, dankclaw/Caddyfile).
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# ABS builds its redirect_uri from the ORIGIN of the
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# request, so each origin the app is served at needs its
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# own registered URI — an unregistered origin is a
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@@ -100,7 +100,7 @@ SSO_USER="${ABS_OIDC_USERNAME:-akadmin}"
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MEMBERS="${ABS_OIDC_USERS:-}"
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E2E_ADMIN="${ABS_E2E_ADMIN:-qa-e2e-admin}"
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BASE="${ABS_BASE:-http://192.168.0.235:8000/audiobookshelf}"
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EXTRA_BASES="${ABS_EXTRA_BASES:-https://abs.franksdank.cloud/audiobookshelf}"
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EXTRA_BASES="${ABS_EXTRA_BASES:-https://audiobooks.franksdank.cloud/audiobookshelf}"
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HOST="${AUTHENTIK_HOST:-dankclaw}"
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# The claim expression: translate group membership into ABS role names. It is stored
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@@ -10,8 +10,8 @@
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#
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# * redirect_uris empty -> authentik answers its own page:
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# "Redirect URI Error — The request fails due to a missing, invalid, or
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# mismatching redirection URI (redirect_uri)". Measured on abs-proxy
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# (abs.franksdank.cloud) 2026-11-03.
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# mismatching redirection URI (redirect_uri)". Measured on the Audiobookshelf
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# guard provider, 2026-11-03.
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# * grant_types empty -> the authorize endpoint refuses the outpost's
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# authorization-code request with a bodiless HTTP 400 (Chromium renders
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# "This page isn't working / HTTP ERROR 400"). Same provider, one step
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@@ -17,7 +17,7 @@ server — it shares nothing with [[Plex]] or [[Jellyfin]] and owns no files on
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array.
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**Host:** Dankserver — **Unit:** `audiobookshelf.service` (rootless Quadlet, user manager) —
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**Doors:** LAN `http://192.168.0.235:8000/audiobookshelf` (direct, what the phone app uses) and guarded `https://abs.franksdank.cloud/audiobookshelf/`.
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**Doors:** LAN `http://192.168.0.235:8000/audiobookshelf` (direct, what the phone app uses) and guarded `https://audiobooks.franksdank.cloud/audiobookshelf/`.
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## Shape
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@@ -98,7 +98,7 @@ the local form, and the phone app offers SSO on its server-address screen. The l
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| The ABS half: issuer, the four IdP URLs, claim, auto-register | `scripts/audiobookshelf-init.sh`, armed automatically when that secret exists in the credential file |
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| Role at first SSO sign-in | the `abs_groups` claim: `audiobookshelf_admins` → `admin`, `audiobookshelf_users` → `user`, in neither → denied (fail closed) |
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| Admin group members | `akadmin` (the operator's own authentik admin account — sign in as it and the claim grants site admin) and `qa-e2e-admin` (the identity the deploy gate signs in as, so the script re-adds it every run; drop it and the gate fails, not a phone) |
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| The guard in front of the vhost | proxy provider `abs-proxy` (external_host `https://abs.franksdank.cloud/`, internal_host `http://caddy:8017`) + application "Audiobookshelf Guard", claimed by the embedded outpost — the ak-shell recipe in [[Caddy]] *Guard a new vhost* creates it; without that row the chain answers authentik's error page, not the login |
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| The guard in front of the vhost | proxy provider `audiobooks-proxy` (external_host `https://audiobooks.franksdank.cloud/`, internal_host `http://caddy:8017`) + application "Audiobookshelf Guard" (its own name tracks the app, not the vhost), claimed by the embedded outpost — the ak-shell recipe in [[Caddy]] *Guard a new vhost* creates it; without that row the chain answers authentik's error page, not the login |
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The IdP saying yes is not the same as being allowed in: with `authOpenIDAutoRegister` on,
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a first sign-in creates the account, and the claim alone decides the type. A user in
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@@ -144,7 +144,7 @@ Both halves — authentik's provider row and ABS's settings — are asserted end
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`callback` against the origin it believes it is served from — `getRequestOrigin()` is
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`x-forwarded-proto://Host` (`server/utils/requestUtils.js`, read in the pinned digest
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2026-11-03) — so behind a TLS edge that reaches the container over plain http it computes
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`http://abs.franksdank.cloud` and answers its own https callback with a 400 "Invalid callback
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`http://audiobooks.franksdank.cloud` and answers its own https callback with a 400 "Invalid callback
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URL - must be same-origin" before the IdP is ever contacted. The Caddy `:8017` route pins
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`header_up X-Forwarded-Proto https` for exactly that reason ([[Caddy]] *Guard a new vhost*);
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the LAN door needs nothing, because there browser and server agree on `http`.
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@@ -197,7 +197,7 @@ Both halves — authentik's provider row and ABS's settings — are asserted end
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service across a reboot ([[Quadlet Lifecycle]]).
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- **Two doors, one app.** `http://192.168.0.235:8000/audiobookshelf` is the raw
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LAN address — plain HTTP, nothing in front, what the phone app is configured
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with; `https://abs.franksdank.cloud/audiobookshelf/` is the guarded vhost
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with; `https://audiobooks.franksdank.cloud/audiobookshelf/` is the guarded vhost
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(Caddy → Anubis → the Authentik outpost → Caddy `:8017` → this container),
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the house chain for browser traffic — [[Caddy]] *Guard a new vhost*. That
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chain serves browsers only: the phone app is a non-browser client and solves
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@@ -87,7 +87,7 @@ Three provisioning rules, each verified live by an outage or a dead login:
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`_get_callback_url`) and `grant_types` is `[]`. Both kill the guard before any credential,
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in this order: authentik renders its own **"Redirect URI Error"** page, and once the URIs
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are filled by hand the next wall is a bodiless **HTTP 400** out of `/application/o/authorize/`
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(both measured on `abs-proxy`, 2026-11-03). Census and repair in one idempotent pass, all
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(both measured on the Audiobookshelf guard provider, 2026-11-03). Census and repair in one idempotent pass, all
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providers at once: `scripts/authentik-proxy-provider-defaults.sh`; `--check` prints the
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census and exits 1 on drift, and a provider that already matches is left alone.
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@@ -107,7 +107,7 @@ authentik's error page instead of the app.
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from authentik.providers.proxy.models import ProxyProvider
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from authentik.core.models import Application
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from authentik.outposts.models import Outpost
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NAME, EXT = "abs", "https://abs.franksdank.cloud/"
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NAME, EXT = "audiobooks", "https://audiobooks.franksdank.cloud/"
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pp = ProxyProvider.objects.filter(name=f"{NAME}-proxy").first()
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if pp is None:
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pp = ProxyProvider.objects.create(name=f"{NAME}-proxy", external_host=EXT,
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@@ -516,7 +516,7 @@
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"category": "admin",
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"section": "Media Library Apps",
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"description": "Audiobook server for the entropy library: its own SQLite library, its own login, per-listener positions.",
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"url": "http://abs.franksdank.cloud/audiobookshelf/",
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"url": "http://audiobooks.franksdank.cloud/audiobookshelf/",
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"docs": "",
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"probe": "192.168.0.235:8000",
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"method": "http",
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@@ -15,11 +15,11 @@ const BASE = "https://www.franksdank.cloud";
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// Every vhost that Caddy routes through anubis:8923 (see dankclaw/Caddyfile).
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// Keep this list in lockstep with the Caddyfile: a new guarded vhost must be
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// added here or the guard-chain audit is incomplete.
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const GUARDED = ["www", "search", "romm", "files", "seerr", "grafana", "prometheus", "loki", "notebook", "abs"];
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const GUARDED = ["www", "search", "romm", "files", "seerr", "grafana", "prometheus", "loki", "notebook", "audiobooks"];
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// Markers that prove app content leaked past the guard to an anonymous user. Each
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// marker must be a string the APP renders that the gate itself could never print —
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// for abs that is the Audiobookshelf login's own SSO button label (the app's OIDC
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// for audiobooks that is the Audiobookshelf login's own SSO button label (the app's
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// door), which authentik's gate never renders because it IS the IdP.
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const LEAK_MARKERS: Record<string, string[]> = {
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"search.franksdank.cloud": ["SearXNG preferences"],
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@@ -29,7 +29,7 @@ const LEAK_MARKERS: Record<string, string[]> = {
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"grafana.franksdank.cloud": ["Dashboards"],
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"prometheus.franksdank.cloud": ["Expression Browser", "Graph"],
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"notebook.franksdank.cloud": ["Open Notebook"],
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"abs.franksdank.cloud": ["Sign in with Authentik"],
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"audiobooks.franksdank.cloud": ["Sign in with Authentik"],
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};
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test("homepage root (/) is guarded for unauthenticated users", async ({ page }) => {
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