Improve web UI

furumi-client-core/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "furumi-client-core"
-version = "0.2.1"
+version = "0.3.4"
 edition = "2024"
 
 [dependencies]

furumi-common/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "furumi-common"
-version = "0.2.1"
+version = "0.3.4"
 edition = "2024"
 
 [dependencies]

furumi-mount-linux/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "furumi-mount-linux"
-version = "0.2.1"
+version = "0.3.4"
 edition = "2024"
 
 [dependencies]

furumi-mount-linux/src/main.rs

@@ -75,7 +75,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         MountOption::NoExec, // Better security for media mount
     ];
 
-    println!("Mounting Furumi-ng to {:?}", args.mount);
+    println!("Mounting Furumi-ng v{} to {:?}", env!("CARGO_PKG_VERSION"), args.mount);
     
     // Use Session + BackgroundSession for graceful unmount on exit
     let session = Session::new(fuse_fs, &args.mount, &options)?;

furumi-mount-macos/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "furumi-mount-macos"
-version = "0.2.1"
+version = "0.3.4"
 edition = "2024"
 
 [dependencies]

furumi-mount-macos/src/main.rs

@@ -108,7 +108,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             std::process::exit(1);
         }
 
-        println!("Mounted Furumi-ng to {:?}", mount_path);
+        println!("Mounted Furumi-ng v{} to {:?}", env!("CARGO_PKG_VERSION"), mount_path);
 
         // Wait for shutdown signal
         while running.load(Ordering::SeqCst) {

furumi-server/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "furumi-server"
-version = "0.2.1"
+version = "0.3.4"
 edition = "2024"
 
 [dependencies]
@@ -18,15 +18,31 @@ rustls = { version = "0.23.37", features = ["ring"] }
 thiserror = "2.0.18"
 tokio = { version = "1.50.0", features = ["full"] }
 tokio-stream = "0.1.18"
+tokio-util = { version = "0.7", features = ["io"] }
 tonic = { version = "0.12.3", features = ["tls"] }
 tracing = "0.1.44"
 tracing-subscriber = { version = "0.3.22", features = ["env-filter"] }
 async-stream = "0.3.6"
 async-trait = "0.1.89"
 prometheus = { version = "0.14.0", features = ["process"] }
-axum = { version = "0.7", features = ["tokio"] }
+axum = { version = "0.7", features = ["tokio", "macros"] }
 once_cell = "1.21.3"
 rcgen = { version = "0.14.7", features = ["pem"] }
+symphonia = { version = "0.5", default-features = false, features = ["mp3", "aac", "flac", "vorbis", "wav", "alac", "adpcm", "pcm", "mpa", "isomp4", "ogg", "aiff", "mkv"] }
+opus = "0.3"
+ogg = "0.9"
+mime_guess = "2.0"
+tower = { version = "0.4", features = ["util"] }
+sha2 = "0.10"
+base64 = "0.22"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+openidconnect = "3.4"
+reqwest = { version = "0.12", default-features = false, features = ["rustls-tls"] }
+hmac = "0.12"
+rand = "0.8"
+encoding_rs = "0.8"
+urlencoding = "2.1.3"
 
 [dev-dependencies]
 tempfile = "3.26.0"

furumi-server/src/main.rs

@@ -2,6 +2,7 @@ pub mod vfs;
 pub mod security;
 pub mod server;
 pub mod metrics;
+pub mod web;
 
 use std::net::SocketAddr;
 use std::path::PathBuf;
@@ -33,9 +34,37 @@ struct Args {
     #[arg(long, env = "FURUMI_METRICS_BIND", default_value = "0.0.0.0:9090")]
     metrics_bind: String,
 
+    /// IP address and port for the web music player
+    #[arg(long, env = "FURUMI_WEB_BIND", default_value = "0.0.0.0:8080")]
+    web_bind: String,
+
+    /// Disable the web music player UI
+    #[arg(long, default_value_t = false)]
+    no_web: bool,
+
     /// Disable TLS encryption (not recommended, use only for debugging)
     #[arg(long, default_value_t = false)]
     no_tls: bool,
+
+    /// OIDC Issuer URL (e.g. https://auth.example.com/application/o/furumi/)
+    #[arg(long, env = "FURUMI_OIDC_ISSUER_URL")]
+    oidc_issuer_url: Option<String>,
+
+    /// OIDC Client ID
+    #[arg(long, env = "FURUMI_OIDC_CLIENT_ID")]
+    oidc_client_id: Option<String>,
+
+    /// OIDC Client Secret
+    #[arg(long, env = "FURUMI_OIDC_CLIENT_SECRET")]
+    oidc_client_secret: Option<String>,
+
+    /// OIDC Redirect URL (e.g. https://music.example.com/auth/callback)
+    #[arg(long, env = "FURUMI_OIDC_REDIRECT_URL")]
+    oidc_redirect_url: Option<String>,
+
+    /// OIDC Session Secret (32+ chars, for HMAC). If not provided, a random one is generated on startup.
+    #[arg(long, env = "FURUMI_OIDC_SESSION_SECRET")]
+    oidc_session_secret: Option<String>,
 }
 
 async fn metrics_handler() -> String {
@@ -79,7 +108,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let svc = RemoteFileSystemServer::with_interceptor(remote_fs, auth.clone());
 
     // Print startup info
-    println!("Furumi-ng Server listening on {}", addr);
+    println!("Furumi-ng Server v{} listening on {}", env!("CARGO_PKG_VERSION"), addr);
     if args.no_tls {
         println!("WARNING: TLS is DISABLED — traffic is unencrypted");
     } else {
@@ -91,7 +120,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         println!("Authentication: enabled (Bearer token)");
     }
     println!("Document Root: {:?}", root_path);
-    println!("Metrics: http://{}/metrics", metrics_addr);
+    println!("Metrics:       http://{}/metrics", metrics_addr);
 
     // Spawn the Prometheus metrics HTTP server on a separate port
     let metrics_app = Router::new().route("/metrics", get(metrics_handler));
@@ -100,6 +129,40 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         axum::serve(metrics_listener, metrics_app).await.unwrap();
     });
 
+    // Spawn the web music player on its own port
+    if !args.no_web {
+        let web_addr: SocketAddr = args.web_bind.parse().unwrap_or_else(|e| {
+            eprintln!("Error: Invalid web bind address '{}': {}", args.web_bind, e);
+            std::process::exit(1);
+        });
+        
+        // Initialize OIDC State if provided
+        let oidc_state = if let (Some(issuer), Some(client_id), Some(secret), Some(redirect)) = (
+            args.oidc_issuer_url,
+            args.oidc_client_id,
+            args.oidc_client_secret,
+            args.oidc_redirect_url,
+        ) {
+            println!("OIDC (SSO):    enabled for web UI (issuer: {})", issuer);
+            match web::auth::oidc_init(issuer, client_id, secret, redirect, args.oidc_session_secret).await {
+                Ok(state) => Some(Arc::new(state)),
+                Err(e) => {
+                    eprintln!("Error initializing OIDC client: {}", e);
+                    std::process::exit(1);
+                }
+            }
+        } else {
+            None
+        };
+
+        let web_app = web::build_router(root_path.clone(), args.token.clone(), oidc_state);
+        let web_listener = tokio::net::TcpListener::bind(web_addr).await?;
+        println!("Web player:    http://{}", web_addr);
+        tokio::spawn(async move {
+            axum::serve(web_listener, web_app).await.unwrap();
+        });
+    }
+
     let mut builder = Server::builder()
         .tcp_keepalive(Some(std::time::Duration::from_secs(60)))
         .http2_keepalive_interval(Some(std::time::Duration::from_secs(60)));

furumi-server/src/web/auth.rs

@@ -0,0 +1,521 @@
+use axum::{
+    body::Body,
+    extract::{Form, Request, State},
+    http::{header, HeaderMap, StatusCode},
+    middleware::Next,
+    response::{Html, IntoResponse, Redirect, Response},
+};
+use openidconnect::{
+    core::{CoreClient, CoreProviderMetadata, CoreResponseType},
+    reqwest::async_http_client,
+    AuthenticationFlow, AuthorizationCode, ClientId, ClientSecret, CsrfToken, IssuerUrl, Nonce,
+    PkceCodeChallenge, PkceCodeVerifier, RedirectUrl, Scope, TokenResponse,
+};
+use rand::RngCore;
+use serde::Deserialize;
+use sha2::{Digest, Sha256};
+
+use base64::Engine;
+use hmac::{Hmac, Mac};
+
+use super::{OidcState, WebState};
+
+/// Cookie name used to store the session token.
+const SESSION_COOKIE: &str = "furumi_session";
+
+fn esc(s: &str) -> String {
+    s.replace('&', "&")
+        .replace('<', "&lt;")
+        .replace('>', "&gt;")
+        .replace('"', "&quot;")
+        .replace('\'', "&#39;")
+}
+
+/// Compute SHA-256 of the token as hex string (stored in cookie, not raw token).
+pub fn token_hash(token: &str) -> String {
+    let mut h = Sha256::new();
+    h.update(token.as_bytes());
+    format!("{:x}", h.finalize())
+}
+
+pub async fn require_auth(
+    State(state): State<WebState>,
+    mut req: Request,
+    next: Next,
+) -> Response {
+    // Auth disabled when token is empty
+    if state.token.is_empty() {
+        req.extensions_mut().insert(super::AuthUserInfo("Unauthenticated".to_string()));
+        return next.run(req).await;
+    }
+
+    let cookies = req
+        .headers()
+        .get(header::COOKIE)
+        .and_then(|v| v.to_str().ok())
+        .unwrap_or("");
+
+    let expected = token_hash(&state.token);
+    let mut authed_user = None;
+    for c in cookies.split(';') {
+        let c = c.trim();
+        if let Some(val) = c.strip_prefix(&format!("{}=", SESSION_COOKIE)) {
+            if val == expected {
+                authed_user = Some("Master Token".to_string());
+                break;
+            } else if let Some(oidc) = &state.oidc {
+                if let Some(user) = verify_sso_cookie(&oidc.session_secret, val) {
+                    authed_user = Some(user);
+                    break;
+                }
+            }
+        }
+    }
+
+    if let Some(user) = authed_user {
+        req.extensions_mut().insert(super::AuthUserInfo(user));
+        next.run(req).await
+    } else {
+        let uri = req.uri().to_string();
+        if uri.starts_with("/api/") {
+            (StatusCode::UNAUTHORIZED, "Unauthorized").into_response()
+        } else {
+            let redirect_url = format!("/login?next={}", urlencoding::encode(&uri));
+            Redirect::to(&redirect_url).into_response()
+        }
+    }
+}
+
+type HmacSha256 = Hmac<sha2::Sha256>;
+
+pub fn generate_sso_cookie(secret: &[u8], user_id: &str) -> String {
+    let mut mac = HmacSha256::new_from_slice(secret).unwrap();
+    mac.update(user_id.as_bytes());
+    let sig = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(mac.finalize().into_bytes());
+    format!("sso:{}:{}", user_id, sig)
+}
+
+pub fn verify_sso_cookie(secret: &[u8], cookie_val: &str) -> Option<String> {
+    let parts: Vec<&str> = cookie_val.split(':').collect();
+    if parts.len() != 3 || parts[0] != "sso" {
+        return None;
+    }
+    let user_id = parts[1];
+    let sig = parts[2];
+    
+    let mut mac = HmacSha256::new_from_slice(secret).unwrap();
+    mac.update(user_id.as_bytes());
+    
+    let expected_sig = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(mac.finalize().into_bytes());
+    if sig == expected_sig {
+        Some(user_id.to_string())
+    } else {
+        None
+    }
+}
+
+#[derive(Deserialize)]
+pub struct LoginQuery {
+    pub next: Option<String>,
+}
+
+/// GET /login — show login form.
+pub async fn login_page(
+    State(state): State<WebState>,
+    axum::extract::Query(query): axum::extract::Query<LoginQuery>,
+) -> impl IntoResponse {
+    let token_enabled = !state.token.is_empty();
+    let oidc_enabled = state.oidc.is_some();
+
+    if !token_enabled && !oidc_enabled {
+        return Redirect::to("/").into_response();
+    }
+    
+    let next_val = query.next.unwrap_or_else(|| "/".to_string());
+    let next_encoded = urlencoding::encode(&next_val);
+    
+    let oidc_html = if oidc_enabled {
+        format!(
+            r#"<div class="divider"><span>OR</span></div>
+            <a href="/auth/login?next={}" class="btn-oidc">Log in with Authentik (SSO)</a>"#,
+            next_encoded
+        )
+    } else {
+        "".to_string()
+    };
+
+    let next_input = format!(r#"<input type="hidden" name="next" value="{}">"#, esc(&next_val));
+    
+    let html = LOGIN_HTML
+        .replace("<!-- OIDC_PLACEHOLDER -->", &oidc_html)
+        .replace("<!-- NEXT_INPUT_PLACEHOLDER -->", &next_input);
+    Html(html).into_response()
+}
+
+#[derive(Deserialize)]
+pub struct LoginForm {
+    password: String,
+    next: Option<String>,
+}
+
+/// POST /login — validate password, set session cookie.
+pub async fn login_submit(
+    State(state): State<WebState>,
+    Form(form): Form<LoginForm>,
+) -> impl IntoResponse {
+    if state.token.is_empty() {
+        return Redirect::to("/").into_response();
+    }
+
+    if form.password == *state.token {
+        let hash = token_hash(&state.token);
+        let cookie = format!(
+            "{}={}; HttpOnly; SameSite=Strict; Path=/; Max-Age=604800",
+            SESSION_COOKIE, hash
+        );
+        let redirect_to = form.next.as_deref().unwrap_or("/");
+        let mut headers = HeaderMap::new();
+        headers.insert(header::SET_COOKIE, cookie.parse().unwrap());
+        headers.insert(header::LOCATION, redirect_to.parse().unwrap());
+        (StatusCode::FOUND, headers, Body::empty()).into_response()
+    } else {
+        Html(LOGIN_ERROR_HTML).into_response()
+    }
+}
+
+/// GET /logout — clear session cookie and redirect to login.
+pub async fn logout() -> impl IntoResponse {
+    let cookie = format!(
+        "{}=; HttpOnly; SameSite=Strict; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT",
+        SESSION_COOKIE
+    );
+    let mut headers = HeaderMap::new();
+    headers.insert(header::SET_COOKIE, cookie.parse().unwrap());
+    headers.insert(header::LOCATION, "/login".parse().unwrap());
+    (StatusCode::FOUND, headers, Body::empty()).into_response()
+}
+
+pub async fn oidc_init(
+    issuer: String,
+    client_id: String,
+    client_secret: String,
+    redirect: String,
+    session_secret_override: Option<String>,
+) -> anyhow::Result<OidcState> {
+    let provider_metadata = CoreProviderMetadata::discover_async(
+        IssuerUrl::new(issuer)?,
+        async_http_client,
+    )
+    .await?;
+
+    let client = CoreClient::from_provider_metadata(
+        provider_metadata,
+        ClientId::new(client_id),
+        Some(ClientSecret::new(client_secret)),
+    )
+    .set_auth_type(openidconnect::AuthType::RequestBody)
+    .set_redirect_uri(RedirectUrl::new(redirect)?);
+
+    let session_secret = if let Some(s) = session_secret_override {
+        let mut b = s.into_bytes();
+        b.resize(32, 0); // Ensure at least 32 bytes for HMAC-SHA256
+        b
+    } else {
+        let mut b = vec![0u8; 32];
+        rand::thread_rng().fill_bytes(&mut b);
+        b
+    };
+
+    Ok(OidcState {
+        client,
+        session_secret,
+    })
+}
+
+pub async fn oidc_login(
+    State(state): State<WebState>,
+    axum::extract::Query(query): axum::extract::Query<LoginQuery>,
+    req: Request,
+) -> impl IntoResponse {
+    let oidc = match &state.oidc {
+        Some(o) => o,
+        None => return Redirect::to("/login").into_response(),
+    };
+
+    let (pkce_challenge, pkce_verifier) = PkceCodeChallenge::new_random_sha256();
+
+    let (auth_url, csrf_token, nonce) = oidc
+        .client
+        .authorize_url(
+            AuthenticationFlow::<CoreResponseType>::AuthorizationCode,
+            CsrfToken::new_random,
+            Nonce::new_random,
+        )
+        .add_scope(Scope::new("openid".to_string()))
+        .add_scope(Scope::new("profile".to_string()))
+        .set_pkce_challenge(pkce_challenge)
+        .url();
+
+    let next_url = query.next.unwrap_or_else(|| "/".to_string());
+    let cookie_val = format!("{}:{}:{}:{}", csrf_token.secret(), nonce.secret(), pkce_verifier.secret(), urlencoding::encode(&next_url));
+    
+    // Determine if we are running behind an HTTPS proxy
+    let is_https = req.headers().get("x-forwarded-proto")
+        .and_then(|v| v.to_str().ok())
+        .map(|s| s == "https")
+        .unwrap_or(false);
+
+    // If HTTPS, use SameSite=None + Secure to fully support cross-domain POST redirects.
+    // Otherwise fallback to Lax for local testing.
+    let cookie_attrs = if is_https {
+        "SameSite=None; Secure"
+    } else {
+        "SameSite=Lax"
+    };
+
+    let cookie = format!("furumi_oidc_state={}; HttpOnly; {}; Path=/; Max-Age=3600", cookie_val, cookie_attrs);
+
+    let mut headers = HeaderMap::new();
+    headers.insert(header::SET_COOKIE, cookie.parse().unwrap());
+    headers.insert(header::LOCATION, auth_url.as_str().parse().unwrap());
+    headers.insert(header::CACHE_CONTROL, "no-store, no-cache, must-revalidate".parse().unwrap());
+    
+    (StatusCode::FOUND, headers, Body::empty()).into_response()
+}
+
+#[derive(Deserialize)]
+pub struct AuthCallbackQuery {
+    code: String,
+    state: String,
+}
+
+pub async fn oidc_callback(
+    State(state): State<WebState>,
+    axum::extract::Query(query): axum::extract::Query<AuthCallbackQuery>,
+    req: Request,
+) -> impl IntoResponse {
+    let oidc = match &state.oidc {
+        Some(o) => o,
+        None => return Redirect::to("/login").into_response(),
+    };
+
+    let cookies = req
+        .headers()
+        .get(header::COOKIE)
+        .and_then(|v| v.to_str().ok())
+        .unwrap_or("");
+
+    let mut matching_val = None;
+    for c in cookies.split(';') {
+        let c = c.trim();
+        if let Some(val) = c.strip_prefix("furumi_oidc_state=") {
+            let parts: Vec<&str> = val.split(':').collect();
+            if parts.len() >= 3 && parts[0] == query.state {
+                matching_val = Some(val.to_string());
+                break;
+            }
+        }
+    }
+
+    let cookie_val = match matching_val {
+        Some(c) => c,
+        None => {
+            tracing::warn!("OIDC callback failed: Invalid state or missing valid cookie. Received cookies: {}", cookies);
+            return (StatusCode::BAD_REQUEST, "Invalid state").into_response();
+        }
+    };
+
+    let parts: Vec<&str> = cookie_val.split(':').collect();
+    let nonce = Nonce::new(parts[1].to_string());
+    let pkce_verifier = PkceCodeVerifier::new(parts[2].to_string());
+
+    let token_response = oidc
+        .client
+        .exchange_code(AuthorizationCode::new(query.code))
+        .set_pkce_verifier(pkce_verifier)
+        .request_async(async_http_client)
+        .await;
+
+    let token_response = match token_response {
+        Ok(tr) => tr,
+        Err(e) => {
+            tracing::error!("OIDC exchange code error: {:?}", e);
+            if let openidconnect::RequestTokenError::ServerResponse(err) = &e {
+                tracing::error!("OIDC Server returned error: {:?}", err);
+            }
+            return (StatusCode::INTERNAL_SERVER_ERROR, format!("OIDC error: {}", e)).into_response();
+        }
+    };
+
+    let id_token = match token_response.id_token() {
+        Some(t) => t,
+        None => return (StatusCode::INTERNAL_SERVER_ERROR, "No ID token").into_response(),
+    };
+
+    let claims = match id_token.claims(&oidc.client.id_token_verifier(), &nonce) {
+        Ok(c) => c,
+        Err(e) => return (StatusCode::UNAUTHORIZED, format!("Invalid ID token: {}", e)).into_response(),
+    };
+
+    let user_id = claims
+        .preferred_username()
+        .map(|u| u.to_string())
+        .or_else(|| claims.email().map(|e| e.to_string()))
+        .unwrap_or_else(|| claims.subject().to_string());
+
+    let session_val = generate_sso_cookie(&oidc.session_secret, &user_id);
+    
+    let parts: Vec<&str> = cookie_val.split(':').collect();
+    let redirect_to = parts.get(3)
+        .and_then(|&s| urlencoding::decode(s).ok())
+        .map(|v| v.into_owned())
+        .unwrap_or_else(|| "/".to_string());
+    let redirect_to = if redirect_to.is_empty() { "/".to_string() } else { redirect_to };
+    
+    let is_https = req.headers().get("x-forwarded-proto")
+        .and_then(|v| v.to_str().ok())
+        .map(|s| s == "https")
+        .unwrap_or(false);
+        
+    let session_attrs = if is_https {
+        "SameSite=Strict; Secure"
+    } else {
+        "SameSite=Strict"
+    };
+    
+    let session_cookie = format!("{}={}; HttpOnly; {}; Path=/; Max-Age=604800", SESSION_COOKIE, session_val, session_attrs);
+    let clear_state_cookie = "furumi_oidc_state=; HttpOnly; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT";
+
+    let mut headers = HeaderMap::new();
+    headers.insert(header::SET_COOKIE, session_cookie.parse().unwrap());
+    headers.append(header::SET_COOKIE, clear_state_cookie.parse().unwrap());
+    headers.insert(header::LOCATION, redirect_to.parse().unwrap());
+
+    (StatusCode::FOUND, headers, Body::empty()).into_response()
+}
+
+const LOGIN_HTML: &str = r#"<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Furumi Player — Login</title>
+<style>
+  * { box-sizing: border-box; margin: 0; padding: 0; }
+  body {
+    min-height: 100vh;
+    display: flex; align-items: center; justify-content: center;
+    background: #0d0f14;
+    font-family: 'Inter', system-ui, sans-serif;
+    color: #e2e8f0;
+  }
+  .card {
+    background: #161b27;
+    border: 1px solid #2a3347;
+    border-radius: 16px;
+    padding: 2.5rem 3rem;
+    width: 360px;
+    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
+  }
+  .logo { font-size: 1.8rem; font-weight: 700; color: #7c6af7; margin-bottom: 0.25rem; }
+  .subtitle { font-size: 0.85rem; color: #64748b; margin-bottom: 2rem; }
+  label { display: block; font-size: 0.8rem; color: #94a3b8; margin-bottom: 0.4rem; }
+  input[type=password] {
+    width: 100%; padding: 0.6rem 0.8rem;
+    background: #0d0f14; border: 1px solid #2a3347; border-radius: 8px;
+    color: #e2e8f0; font-size: 0.95rem; outline: none;
+    transition: border-color 0.2s;
+  }
+  input[type=password]:focus { border-color: #7c6af7; }
+  button {
+    margin-top: 1.2rem; width: 100%; padding: 0.65rem;
+    background: #7c6af7; border: none; border-radius: 8px;
+    color: #fff; font-size: 0.95rem; font-weight: 600; cursor: pointer;
+    transition: background 0.2s;
+  }
+  button:hover { background: #6b58e8; }
+  .btn-oidc {
+    display: block; width: 100%; padding: 0.65rem; text-align: center;
+    background: #2a3347; border: 1px solid #3d4a66; border-radius: 8px;
+    color: #e2e8f0; font-size: 0.95rem; font-weight: 600; text-decoration: none;
+    transition: background 0.2s;
+  }
+  .btn-oidc:hover { background: #3d4a66; }
+  .divider {
+    display: flex; align-items: center; text-align: center; margin: 1.5rem 0;
+    color: #64748b; font-size: 0.75rem;
+  }
+  .divider::before, .divider::after {
+    content: ''; flex: 1; border-bottom: 1px solid #2a3347;
+  }
+  .divider span { padding: 0 10px; }
+</style>
+</head>
+<body>
+<div class="card">
+  <div class="logo">🎵 Furumi</div>
+  <div class="subtitle">Enter access token to continue</div>
+  <form method="POST" action="/login">
+    <!-- NEXT_INPUT_PLACEHOLDER -->
+    <label for="password">Access Token</label>
+    <input type="password" id="password" name="password" autofocus autocomplete="current-password">
+    <button type="submit">Sign In</button>
+  </form>
+  <!-- OIDC_PLACEHOLDER -->
+</div>
+</body>
+</html>"#;
+
+const LOGIN_ERROR_HTML: &str = r#"<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<title>Furumi Player — Login</title>
+<style>
+  * { box-sizing: border-box; margin: 0; padding: 0; }
+  body {
+    min-height: 100vh;
+    display: flex; align-items: center; justify-content: center;
+    background: #0d0f14;
+    font-family: 'Inter', system-ui, sans-serif;
+    color: #e2e8f0;
+  }
+  .card {
+    background: #161b27;
+    border: 1px solid #2a3347;
+    border-radius: 16px;
+    padding: 2.5rem 3rem;
+    width: 360px;
+    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
+  }
+  .logo { font-size: 1.8rem; font-weight: 700; color: #7c6af7; margin-bottom: 0.25rem; }
+  .subtitle { font-size: 0.85rem; color: #64748b; margin-bottom: 2rem; }
+  .error { color: #f87171; font-size: 0.85rem; margin-bottom: 1rem; }
+  label { display: block; font-size: 0.8rem; color: #94a3b8; margin-bottom: 0.4rem; }
+  input[type=password] {
+    width: 100%; padding: 0.6rem 0.8rem;
+    background: #0d0f14; border: 1px solid #f87171; border-radius: 8px;
+    color: #e2e8f0; font-size: 0.95rem; outline: none;
+  }
+  button {
+    margin-top: 1.2rem; width: 100%; padding: 0.65rem;
+    background: #7c6af7; border: none; border-radius: 8px;
+    color: #fff; font-size: 0.95rem; font-weight: 600; cursor: pointer;
+  }
+  button:hover { background: #6b58e8; }
+</style>
+</head>
+<body>
+<div class="card">
+  <div class="logo">🎵 Furumi</div>
+  <div class="subtitle">Enter access token to continue</div>
+  <p class="error">❌ Invalid token. Please try again.</p>
+  <form method="POST" action="/login">
+    <!-- NEXT_INPUT_PLACEHOLDER -->
+    <label for="password">Access Token</label>
+    <input type="password" id="password" name="password" autofocus>
+    <button type="submit">Sign In</button>
+  </form>
+</div>
+</body>
+</html>"#;

furumi-server/src/web/browse.rs

@@ -0,0 +1,132 @@
+use axum::{
+    extract::{Query, State},
+    http::StatusCode,
+    response::{IntoResponse, Json},
+};
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+
+use crate::security::sanitize_path;
+use super::WebState;
+
+#[derive(Deserialize)]
+pub struct BrowseQuery {
+    #[serde(default)]
+    pub path: String,
+}
+
+#[derive(Serialize)]
+pub struct BrowseResponse {
+    pub path: String,
+    pub entries: Vec<Entry>,
+}
+
+#[derive(Serialize)]
+pub struct Entry {
+    pub name: String,
+    #[serde(rename = "type")]
+    pub kind: EntryKind,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub size: Option<u64>,
+}
+
+#[derive(Serialize)]
+#[serde(rename_all = "lowercase")]
+pub enum EntryKind {
+    File,
+    Dir,
+}
+
+pub async fn handler(
+    State(state): State<WebState>,
+    Query(query): Query<BrowseQuery>,
+) -> impl IntoResponse {
+    let safe = match sanitize_path(&query.path) {
+        Ok(p) => p,
+        Err(_) => {
+            return (StatusCode::BAD_REQUEST, Json(serde_json::json!({"error": "invalid path"}))).into_response();
+        }
+    };
+
+    let dir_path: PathBuf = state.root.join(&safe);
+
+    let read_dir = match tokio::fs::read_dir(&dir_path).await {
+        Ok(rd) => rd,
+        Err(e) => {
+            let status = if e.kind() == std::io::ErrorKind::NotFound {
+                StatusCode::NOT_FOUND
+            } else {
+                StatusCode::INTERNAL_SERVER_ERROR
+            };
+            return (status, Json(serde_json::json!({"error": e.to_string()}))).into_response();
+        }
+    };
+
+    let mut entries: Vec<Entry> = Vec::new();
+    let mut rd = read_dir;
+
+    loop {
+        match rd.next_entry().await {
+            Ok(Some(entry)) => {
+                let name = entry.file_name().to_string_lossy().into_owned();
+                // Skip hidden files
+                if name.starts_with('.') {
+                    continue;
+                }
+                let meta = match entry.metadata().await {
+                    Ok(m) => m,
+                    Err(_) => continue,
+                };
+                if meta.is_dir() {
+                    entries.push(Entry { name, kind: EntryKind::Dir, size: None });
+                } else if meta.is_file() {
+                    // Only expose audio files
+                    if is_audio_file(&name) {
+                        entries.push(Entry {
+                            name,
+                            kind: EntryKind::File,
+                            size: Some(meta.len()),
+                        });
+                    }
+                }
+            }
+            Ok(None) => break,
+            Err(e) => {
+                return (
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    Json(serde_json::json!({"error": e.to_string()})),
+                )
+                    .into_response();
+            }
+        }
+    }
+
+    // Sort: dirs first, then files; alphabetically within each group
+    entries.sort_by(|a, b| {
+        let a_dir = matches!(a.kind, EntryKind::Dir);
+        let b_dir = matches!(b.kind, EntryKind::Dir);
+        b_dir.cmp(&a_dir).then(a.name.to_lowercase().cmp(&b.name.to_lowercase()))
+    });
+
+    let response = BrowseResponse {
+        path: safe,
+        entries,
+    };
+
+    (StatusCode::OK, Json(response)).into_response()
+}
+
+/// Whitelist of audio extensions served via the web player.
+pub fn is_audio_file(name: &str) -> bool {
+    let ext = name.rsplit('.').next().unwrap_or("").to_lowercase();
+    matches!(
+        ext.as_str(),
+        "mp3" | "flac" | "ogg" | "opus" | "aac" | "m4a" | "wav" | "ape" | "wv" | "wma" | "tta" | "aiff" | "aif"
+    )
+}
+
+/// Returns true if the format needs transcoding (not natively supported by browsers).
+pub fn needs_transcode(name: &str) -> bool {
+    let ext = name.rsplit('.').next().unwrap_or("").to_lowercase();
+    matches!(ext.as_str(), "ape" | "wv" | "wma" | "tta" | "aiff" | "aif")
+}

furumi-server/src/web/meta.rs

@@ -0,0 +1,204 @@
+use axum::{
+    extract::{Path, State},
+    http::StatusCode,
+    response::{IntoResponse, Json},
+};
+use base64::{Engine, engine::general_purpose::STANDARD as BASE64};
+use serde::Serialize;
+use symphonia::core::{
+    codecs::CODEC_TYPE_NULL,
+    formats::FormatOptions,
+    io::MediaSourceStream,
+    meta::{MetadataOptions, StandardTagKey},
+    probe::Hint,
+};
+
+use crate::security::sanitize_path;
+use super::WebState;
+
+#[derive(Serialize)]
+pub struct MetaResponse {
+    pub title: Option<String>,
+    pub artist: Option<String>,
+    pub album: Option<String>,
+    pub track: Option<u32>,
+    pub year: Option<u32>,
+    pub duration_secs: Option<f64>,
+    pub cover_base64: Option<String>, // "data:image/jpeg;base64,..."
+}
+
+pub async fn handler(
+    State(state): State<WebState>,
+    Path(path): Path<String>,
+) -> impl IntoResponse {
+    let safe = match sanitize_path(&path) {
+        Ok(p) => p,
+        Err(_) => return (StatusCode::BAD_REQUEST, Json(serde_json::json!({"error": "invalid path"}))).into_response(),
+    };
+
+    let file_path = state.root.join(&safe);
+    let filename = file_path
+        .file_name()
+        .and_then(|n| n.to_str())
+        .unwrap_or("")
+        .to_owned();
+
+    let meta = tokio::task::spawn_blocking(move || read_meta(file_path, &filename)).await;
+
+    match meta {
+        Ok(Ok(m)) => (StatusCode::OK, Json(m)).into_response(),
+        Ok(Err(e)) => (StatusCode::INTERNAL_SERVER_ERROR, Json(serde_json::json!({"error": e.to_string()}))).into_response(),
+        Err(e) => (StatusCode::INTERNAL_SERVER_ERROR, Json(serde_json::json!({"error": e.to_string()}))).into_response(),
+    }
+}
+
+fn read_meta(file_path: std::path::PathBuf, filename: &str) -> anyhow::Result<MetaResponse> {
+    let file = std::fs::File::open(&file_path)?;
+    let mss = MediaSourceStream::new(Box::new(file), Default::default());
+
+    let mut hint = Hint::new();
+    if let Some(ext) = file_path.extension().and_then(|e| e.to_str()) {
+        hint.with_extension(ext);
+    }
+
+    let mut probed = symphonia::default::get_probe().format(
+        &hint,
+        mss,
+        &FormatOptions { enable_gapless: false, ..Default::default() },
+        &MetadataOptions::default(),
+    )?;
+
+    // Extract tags from container-level metadata
+    let mut title: Option<String> = None;
+    let mut artist: Option<String> = None;
+    let mut album: Option<String> = None;
+    let mut track: Option<u32> = None;
+    let mut year: Option<u32> = None;
+    let mut cover_data: Option<(Vec<u8>, String)> = None;
+
+    // Check metadata side-data (e.g., ID3 tags probed before format)
+    if let Some(rev) = probed.metadata.get().as_ref().and_then(|m| m.current()) {
+        extract_tags(rev.tags(), rev.visuals(), &mut title, &mut artist, &mut album, &mut track, &mut year, &mut cover_data);
+    }
+
+    // Also check format-embedded metadata
+    if let Some(rev) = probed.format.metadata().current() {
+        if title.is_none() {
+            extract_tags(rev.tags(), rev.visuals(), &mut title, &mut artist, &mut album, &mut track, &mut year, &mut cover_data);
+        }
+    }
+
+    // If no title from tags, use filename without extension
+    if title.is_none() {
+        title = Some(
+            std::path::Path::new(filename)
+                .file_stem()
+                .and_then(|s| s.to_str())
+                .unwrap_or(filename)
+                .to_owned(),
+        );
+    }
+
+    // Estimate duration from track time_base + n_frames
+    let duration_secs = probed
+        .format
+        .tracks()
+        .iter()
+        .find(|t| t.codec_params.codec != CODEC_TYPE_NULL)
+        .and_then(|t| {
+            let n_frames = t.codec_params.n_frames?;
+            let tb = t.codec_params.time_base?;
+            Some(n_frames as f64 * tb.numer as f64 / tb.denom as f64)
+        });
+
+    let cover_base64 = cover_data.map(|(data, mime)| {
+        format!("data:{};base64,{}", mime, BASE64.encode(&data))
+    });
+
+    Ok(MetaResponse {
+        title,
+        artist,
+        album,
+        track,
+        year,
+        duration_secs,
+        cover_base64,
+    })
+}
+
+fn extract_tags(
+    tags: &[symphonia::core::meta::Tag],
+    visuals: &[symphonia::core::meta::Visual],
+    title: &mut Option<String>,
+    artist: &mut Option<String>,
+    album: &mut Option<String>,
+    track: &mut Option<u32>,
+    year: &mut Option<u32>,
+    cover: &mut Option<(Vec<u8>, String)>,
+) {
+    for tag in tags {
+        let value = fix_encoding(tag.value.to_string());
+        if let Some(key) = tag.std_key {
+            match key {
+                StandardTagKey::TrackTitle => {
+                    *title = Some(value);
+                }
+                StandardTagKey::Artist | StandardTagKey::Performer => {
+                    if artist.is_none() {
+                        *artist = Some(value);
+                    }
+                }
+                StandardTagKey::Album => {
+                    *album = Some(value);
+                }
+                StandardTagKey::TrackNumber => {
+                    if track.is_none() {
+                        *track = value.parse().ok();
+                    }
+                }
+                StandardTagKey::Date | StandardTagKey::OriginalDate => {
+                    if year.is_none() {
+                        // Parse first 4 characters as year
+                        *year = value[..4.min(value.len())].parse().ok();
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+
+    if cover.is_none() {
+        if let Some(visual) = visuals.first() {
+            let mime = visual.media_type.clone();
+            *cover = Some((visual.data.to_vec(), mime));
+        }
+    }
+}
+
+/// Heuristic to fix mojibake (CP1251 bytes interpreted as Latin-1/Windows-1252)
+fn fix_encoding(s: String) -> String {
+    // If it's already a valid UTF-8 string that doesn't look like mojibake, return it.
+    // Mojibake looks like characters from Latin-1 Supplement (0xC0-0xFF)
+    // where they should be Cyrillic.
+    
+    let bytes: Vec<u8> = s.chars().map(|c| c as u32).filter(|&c| c <= 255).map(|c| c as u8).collect();
+    
+    // If the length is different, it means there were characters > 255, so it's not simple Latin-1 mojibake.
+    if bytes.len() != s.chars().count() {
+        return s;
+    }
+
+    // Check if it's likely CP1251. Russian characters in CP1251 are 0xC0-0xFF.
+    // In Latin-1 these are characters like À-ÿ.
+    let has_mojibake = bytes.iter().any(|&b| b >= 0xC0);
+    if !has_mojibake {
+        return s;
+    }
+
+    let (decoded, _, errors) = encoding_rs::WINDOWS_1251.decode(&bytes);
+    if errors {
+        return s;
+    }
+    
+    decoded.into_owned()
+}

furumi-server/src/web/mod.rs

@@ -0,0 +1,66 @@
+pub mod auth;
+pub mod browse;
+pub mod meta;
+pub mod stream;
+pub mod transcoder;
+
+use std::path::PathBuf;
+use std::sync::Arc;
+
+use axum::{
+    Router,
+    middleware,
+    routing::get,
+};
+
+/// Shared state passed to all web handlers.
+#[derive(Clone)]
+pub struct WebState {
+    pub root: Arc<PathBuf>,
+    pub token: Arc<String>,
+    pub oidc: Option<Arc<OidcState>>,
+}
+
+pub struct OidcState {
+    pub client: openidconnect::core::CoreClient,
+    pub session_secret: Vec<u8>,
+}
+
+/// Build the axum Router for the web player.
+pub fn build_router(root: PathBuf, token: String, oidc: Option<Arc<OidcState>>) -> Router {
+    let state = WebState {
+        root: Arc::new(root),
+        token: Arc::new(token),
+        oidc,
+    };
+
+    let api = Router::new()
+        .route("/browse", get(browse::handler))
+        .route("/stream/*path", get(stream::handler))
+        .route("/meta/*path", get(meta::handler));
+
+    let authed_routes = Router::new()
+        .route("/", get(player_html))
+        .nest("/api", api)
+        .route_layer(middleware::from_fn_with_state(state.clone(), auth::require_auth));
+
+    Router::new()
+        .route("/login", get(auth::login_page).post(auth::login_submit))
+        .route("/logout", get(auth::logout))
+        .route("/auth/login", get(auth::oidc_login))
+        .route("/auth/callback", get(auth::oidc_callback))
+        .merge(authed_routes)
+        .with_state(state)
+}
+
+#[derive(Clone)]
+pub struct AuthUserInfo(pub String);
+
+async fn player_html(
+    axum::extract::Extension(user_info): axum::extract::Extension<AuthUserInfo>,
+) -> axum::response::Html<String> {
+    let html = include_str!("player.html")
+        .replace("<!-- USERNAME_PLACEHOLDER -->", &user_info.0)
+        .replace("<!-- VERSION_PLACEHOLDER -->", env!("CARGO_PKG_VERSION"));
+    axum::response::Html(html)
+}

furumi-server/src/web/stream.rs

@@ -0,0 +1,171 @@
+use axum::{
+    body::Body,
+    extract::{Path, Query, State},
+    http::{HeaderMap, HeaderValue, StatusCode, header},
+    response::{IntoResponse, Response},
+};
+use serde::Deserialize;
+use tokio::io::{AsyncReadExt, AsyncSeekExt};
+
+use crate::security::sanitize_path;
+use super::{
+    WebState,
+    browse::{is_audio_file, needs_transcode},
+};
+
+#[derive(Deserialize)]
+pub struct StreamQuery {
+    #[serde(default)]
+    pub transcode: Option<String>,
+}
+
+pub async fn handler(
+    State(state): State<WebState>,
+    Path(path): Path<String>,
+    Query(query): Query<StreamQuery>,
+    headers: HeaderMap,
+) -> impl IntoResponse {
+    let safe = match sanitize_path(&path) {
+        Ok(p) => p,
+        Err(_) => return bad_request("invalid path"),
+    };
+
+    let file_path = state.root.join(&safe);
+
+    let filename = file_path
+        .file_name()
+        .and_then(|n| n.to_str())
+        .unwrap_or("")
+        .to_owned();
+
+    if !is_audio_file(&filename) {
+        return (StatusCode::FORBIDDEN, "not an audio file").into_response();
+    }
+
+    let force_transcode = query.transcode.as_deref() == Some("1");
+
+    if force_transcode || needs_transcode(&filename) {
+        return stream_transcoded(file_path).await;
+    }
+
+    stream_native(file_path, &filename, &headers).await
+}
+
+/// Stream a file as-is with Range support.
+async fn stream_native(file_path: std::path::PathBuf, filename: &str, req_headers: &HeaderMap) -> Response {
+    let mut file = match tokio::fs::File::open(&file_path).await {
+        Ok(f) => f,
+        Err(e) => {
+            let status = if e.kind() == std::io::ErrorKind::NotFound {
+                StatusCode::NOT_FOUND
+            } else {
+                StatusCode::INTERNAL_SERVER_ERROR
+            };
+            return (status, e.to_string()).into_response();
+        }
+    };
+
+    let file_size = match file.metadata().await {
+        Ok(m) => m.len(),
+        Err(e) => return (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()).into_response(),
+    };
+
+    let content_type = guess_content_type(filename);
+
+    // Parse Range header
+    let range_header = req_headers
+        .get(header::RANGE)
+        .and_then(|v| v.to_str().ok())
+        .and_then(parse_range);
+
+    if let Some((start, end)) = range_header {
+        let end = end.unwrap_or(file_size - 1).min(file_size - 1);
+        if start > end || start >= file_size {
+            return (StatusCode::RANGE_NOT_SATISFIABLE, "invalid range").into_response();
+        }
+
+        let length = end - start + 1;
+
+        if let Err(e) = file.seek(std::io::SeekFrom::Start(start)).await {
+            return (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()).into_response();
+        }
+
+        let limited = file.take(length);
+        let stream = tokio_util::io::ReaderStream::new(limited);
+        let body = Body::from_stream(stream);
+
+        let mut resp_headers = HeaderMap::new();
+        resp_headers.insert(header::CONTENT_TYPE, content_type.parse().unwrap());
+        resp_headers.insert(header::ACCEPT_RANGES, HeaderValue::from_static("bytes"));
+        resp_headers.insert(header::CONTENT_LENGTH, length.to_string().parse().unwrap());
+        resp_headers.insert(
+            header::CONTENT_RANGE,
+            format!("bytes {}-{}/{}", start, end, file_size).parse().unwrap(),
+        );
+        (StatusCode::PARTIAL_CONTENT, resp_headers, body).into_response()
+    } else {
+        // Full file
+        let stream = tokio_util::io::ReaderStream::new(file);
+        let body = Body::from_stream(stream);
+
+        let mut resp_headers = HeaderMap::new();
+        resp_headers.insert(header::CONTENT_TYPE, content_type.parse().unwrap());
+        resp_headers.insert(header::ACCEPT_RANGES, HeaderValue::from_static("bytes"));
+        resp_headers.insert(header::CONTENT_LENGTH, file_size.to_string().parse().unwrap());
+        (StatusCode::OK, resp_headers, body).into_response()
+    }
+}
+
+/// Stream a transcoded (Ogg/Opus) version of the file.
+async fn stream_transcoded(file_path: std::path::PathBuf) -> Response {
+    let ogg_data = match tokio::task::spawn_blocking(move || {
+        super::transcoder::transcode_to_ogg_opus(file_path)
+    })
+    .await
+    {
+        Ok(Ok(data)) => data,
+        Ok(Err(e)) => {
+            return (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()).into_response();
+        }
+        Err(e) => {
+            return (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()).into_response();
+        }
+    };
+
+    let len = ogg_data.len();
+    let mut resp_headers = HeaderMap::new();
+    resp_headers.insert(header::CONTENT_TYPE, "audio/ogg".parse().unwrap());
+    resp_headers.insert(header::CONTENT_LENGTH, len.to_string().parse().unwrap());
+    resp_headers.insert(header::ACCEPT_RANGES, HeaderValue::from_static("none"));
+
+    (StatusCode::OK, resp_headers, Body::from(ogg_data)).into_response()
+}
+
+/// Parse `Range: bytes=<start>-<end>` header.
+fn parse_range(s: &str) -> Option<(u64, Option<u64>)> {
+    let s = s.strip_prefix("bytes=")?;
+    let mut parts = s.splitn(2, '-');
+    let start: u64 = parts.next()?.parse().ok()?;
+    let end: Option<u64> = parts.next().and_then(|e| {
+        if e.is_empty() { None } else { e.parse().ok() }
+    });
+    Some((start, end))
+}
+
+fn guess_content_type(filename: &str) -> &'static str {
+    let ext = filename.rsplit('.').next().unwrap_or("").to_lowercase();
+    match ext.as_str() {
+        "mp3"       => "audio/mpeg",
+        "flac"      => "audio/flac",
+        "ogg"       => "audio/ogg",
+        "opus"      => "audio/ogg; codecs=opus",
+        "aac"       => "audio/aac",
+        "m4a"       => "audio/mp4",
+        "wav"       => "audio/wav",
+        _           => "application/octet-stream",
+    }
+}
+
+fn bad_request(msg: &'static str) -> Response {
+    (StatusCode::BAD_REQUEST, msg).into_response()
+}

furumi-server/src/web/transcoder.rs

@@ -0,0 +1,244 @@
+//! Symphonia-based audio transcoder: decodes any format → encodes to Ogg/Opus stream.
+//!
+//! The heavy decode/encode work runs in a `spawn_blocking` thread.
+//! PCM samples are sent over a channel to the async stream handler.
+
+use std::path::PathBuf;
+use std::io::Cursor;
+
+use anyhow::{anyhow, Result};
+use symphonia::core::{
+    audio::{AudioBufferRef, Signal},
+    codecs::{DecoderOptions, CODEC_TYPE_NULL},
+    errors::Error as SymphoniaError,
+    formats::FormatOptions,
+    io::MediaSourceStream,
+    meta::MetadataOptions,
+    probe::Hint,
+};
+use ogg::writing::PacketWriter;
+use opus::{Application, Channels, Encoder};
+
+/// Transcode an audio file at `path` into an Ogg/Opus byte stream.
+/// Returns `Vec<u8>` with the full Ogg/Opus file (suitable for streaming/download).
+///
+/// This is intentionally synchronous (for use inside `spawn_blocking`).
+pub fn transcode_to_ogg_opus(path: PathBuf) -> Result<Vec<u8>> {
+    // ---- Open and probe the source ----
+    let file = std::fs::File::open(&path)?;
+    let mss = MediaSourceStream::new(Box::new(file), Default::default());
+
+    let mut hint = Hint::new();
+    if let Some(ext) = path.extension().and_then(|e| e.to_str()) {
+        hint.with_extension(ext);
+    }
+
+    let probed = symphonia::default::get_probe()
+        .format(&hint, mss, &FormatOptions::default(), &MetadataOptions::default())
+        .map_err(|e| anyhow!("probe failed: {e}"))?;
+
+    let mut format = probed.format;
+
+    // Find the default audio track
+    let track = format
+        .tracks()
+        .iter()
+        .find(|t| t.codec_params.codec != CODEC_TYPE_NULL)
+        .ok_or_else(|| anyhow!("no audio track found"))?
+        .clone();
+
+    let track_id = track.id;
+    let codec_params = &track.codec_params;
+
+    let sample_rate = codec_params.sample_rate.unwrap_or(44100);
+    let n_channels = codec_params.channels.map(|c| c.count()).unwrap_or(2);
+
+    // Opus only supports 1 or 2 channels; downmix to stereo if needed
+    let opus_channels = if n_channels == 1 { Channels::Mono } else { Channels::Stereo };
+    let opus_ch_count = if n_channels == 1 { 1usize } else { 2 };
+
+    // Opus encoder (target 48 kHz, we'll resample if needed)
+    // Opus natively works at 48000 Hz; symphonia will decode at source rate.
+    // For simplicity, we encode at the source sample rate - most clients handle this.
+    let opus_sample_rate = if [8000u32, 12000, 16000, 24000, 48000].contains(&sample_rate) {
+        sample_rate
+    } else {
+        // Opus spec: use closest supported rate; 48000 is safest
+        48000
+    };
+
+    let mut encoder = Encoder::new(opus_sample_rate, opus_channels, Application::Audio)
+        .map_err(|e| anyhow!("opus encoder init: {e}"))?;
+
+    // Typical Opus frame = 20ms
+    let frame_size = (opus_sample_rate as usize * 20) / 1000; // samples per channel per frame
+
+    let mut decoder = symphonia::default::get_codecs()
+        .make(codec_params, &DecoderOptions::default())
+        .map_err(|e| anyhow!("decoder init: {e}"))?;
+
+    // ---- Ogg output buffer ----
+    let mut ogg_buf: Vec<u8> = Vec::with_capacity(4 * 1024 * 1024);
+    {
+        let cursor = Cursor::new(&mut ogg_buf);
+        let mut pkt_writer = PacketWriter::new(cursor);
+
+        // Write Opus header packet (stream serial = 1)
+        let serial: u32 = 1;
+        let opus_head = build_opus_head(opus_ch_count as u8, opus_sample_rate, 0);
+        pkt_writer.write_packet(opus_head, serial, ogg::writing::PacketWriteEndInfo::EndPage, 0)?;
+
+        // Write Opus tags packet (empty)
+        let opus_tags = build_opus_tags();
+        pkt_writer.write_packet(opus_tags, serial, ogg::writing::PacketWriteEndInfo::EndPage, 0)?;
+
+        let mut sample_buf: Vec<f32> = Vec::new();
+        let mut granule_pos: u64 = 0;
+
+        loop {
+            let packet = match format.next_packet() {
+                Ok(p) => p,
+                Err(SymphoniaError::IoError(e)) if e.kind() == std::io::ErrorKind::UnexpectedEof => break,
+                Err(SymphoniaError::ResetRequired) => {
+                    decoder.reset();
+                    continue;
+                }
+                Err(e) => return Err(anyhow!("format error: {e}")),
+            };
+
+            if packet.track_id() != track_id {
+                continue;
+            }
+
+            match decoder.decode(&packet) {
+                Ok(decoded) => {
+                    collect_samples(&decoded, opus_ch_count, &mut sample_buf);
+                }
+                Err(SymphoniaError::DecodeError(_)) => continue,
+                Err(e) => return Err(anyhow!("decode error: {e}")),
+            }
+
+            // Encode complete frames from sample_buf
+            while sample_buf.len() >= frame_size * opus_ch_count {
+                let frame: Vec<f32> = sample_buf.drain(..frame_size * opus_ch_count).collect();
+                let mut out = vec![0u8; 4000];
+                let encoded_len = encoder
+                    .encode_float(&frame, &mut out)
+                    .map_err(|e| anyhow!("opus encode: {e}"))?;
+                out.truncate(encoded_len);
+
+                granule_pos += frame_size as u64;
+                pkt_writer.write_packet(
+                    out,
+                    serial,
+                    ogg::writing::PacketWriteEndInfo::NormalPacket,
+                    granule_pos,
+                )?;
+            }
+        }
+
+        // Encode remaining samples (partial frame — pad with silence)
+        if !sample_buf.is_empty() {
+            let needed = frame_size * opus_ch_count;
+            sample_buf.resize(needed, 0.0);
+            let mut out = vec![0u8; 4000];
+            let encoded_len = encoder
+                .encode_float(&sample_buf, &mut out)
+                .map_err(|e| anyhow!("opus encode final: {e}"))?;
+            out.truncate(encoded_len);
+            granule_pos += frame_size as u64;
+            pkt_writer.write_packet(
+                out,
+                serial,
+                ogg::writing::PacketWriteEndInfo::EndStream,
+                granule_pos,
+            )?;
+        }
+    }
+
+    Ok(ogg_buf)
+}
+
+/// Collect PCM samples from a symphonia AudioBufferRef into a flat f32 vec.
+/// Downmixes to `target_channels` (1 or 2) if source has more channels.
+fn collect_samples(decoded: &AudioBufferRef<'_>, target_channels: usize, out: &mut Vec<f32>) {
+    match decoded {
+        AudioBufferRef::F32(buf) => {
+            interleave_channels(buf.chan(0), if buf.spec().channels.count() > 1 { Some(buf.chan(1)) } else { None }, target_channels, out);
+        }
+        AudioBufferRef::S16(buf) => {
+            let ch0: Vec<f32> = buf.chan(0).iter().map(|&s| s as f32 / 32768.0).collect();
+            let ch1 = if buf.spec().channels.count() > 1 {
+                Some(buf.chan(1).iter().map(|&s| s as f32 / 32768.0).collect::<Vec<_>>())
+            } else {
+                None
+            };
+            interleave_channels(&ch0, ch1.as_deref(), target_channels, out);
+        }
+        AudioBufferRef::S32(buf) => {
+            let ch0: Vec<f32> = buf.chan(0).iter().map(|&s| s as f32 / 2147483648.0).collect();
+            let ch1 = if buf.spec().channels.count() > 1 {
+                Some(buf.chan(1).iter().map(|&s| s as f32 / 2147483648.0).collect::<Vec<_>>())
+            } else {
+                None
+            };
+            interleave_channels(&ch0, ch1.as_deref(), target_channels, out);
+        }
+        AudioBufferRef::U8(buf) => {
+            let ch0: Vec<f32> = buf.chan(0).iter().map(|&s| (s as f32 - 128.0) / 128.0).collect();
+            let ch1 = if buf.spec().channels.count() > 1 {
+                Some(buf.chan(1).iter().map(|&s| (s as f32 - 128.0) / 128.0).collect::<Vec<_>>())
+            } else {
+                None
+            };
+            interleave_channels(&ch0, ch1.as_deref(), target_channels, out);
+        }
+        _ => {
+            // For other formats, try to get samples via S16 conversion
+            // (symphonia may provide other types; we skip unsupported ones)
+        }
+    }
+}
+
+fn interleave_channels(ch0: &[f32], ch1: Option<&[f32]>, target_channels: usize, out: &mut Vec<f32>) {
+    let len = ch0.len();
+    if target_channels == 1 {
+        if let Some(c1) = ch1 {
+            // Mix down to mono
+            out.extend(ch0.iter().zip(c1.iter()).map(|(l, r)| (l + r) * 0.5));
+        } else {
+            out.extend_from_slice(ch0);
+        }
+    } else {
+        // Stereo interleaved
+        let c1 = ch1.unwrap_or(ch0);
+        for i in 0..len {
+            out.push(ch0[i]);
+            out.push(c1[i]);
+        }
+    }
+}
+
+/// Build OpusHead binary packet (RFC 7845).
+fn build_opus_head(channels: u8, sample_rate: u32, pre_skip: u16) -> Vec<u8> {
+    let mut v = Vec::with_capacity(19);
+    v.extend_from_slice(b"OpusHead");
+    v.push(1); // version
+    v.push(channels);
+    v.extend_from_slice(&pre_skip.to_le_bytes());
+    v.extend_from_slice(&sample_rate.to_le_bytes());
+    v.extend_from_slice(&0u16.to_le_bytes()); // output gain
+    v.push(0); // channel mapping family
+    v
+}
+
+/// Build OpusTags binary packet with minimal vendor string.
+fn build_opus_tags() -> Vec<u8> {
+    let vendor = b"furumi-server";
+    let mut v = Vec::new();
+    v.extend_from_slice(b"OpusTags");
+    v.extend_from_slice(&(vendor.len() as u32).to_le_bytes());
+    v.extend_from_slice(vendor);
+    v.extend_from_slice(&0u32.to_le_bytes()); // user comment list length = 0
+    v
+}