Update server.js

server.js

@@ -32,7 +32,6 @@ const IV_LEN = 12;
 const TAG_LEN = 16;
 const OVERHEAD = IV_LEN + TAG_LEN;
 
-// --- ENV ---
 const IMGBB_API_KEY = process.env.IMGBB_API_KEY;
 const SESSION_SECRET = process.env.SESSION_SECRET;
 const ADMIN_USER = process.env.ADMIN_USER || 'admin';
@@ -42,18 +41,15 @@ if (!IMGBB_API_KEY || !SESSION_SECRET) {
     process.exit(1);
 }
 
-// --- DATABASE INSTANCE ---
 const db = new Database(DB_PATH);
 db.pragma('journal_mode = WAL');
 db.pragma('busy_timeout = 5000');
 
-// --- CRYPTO UTILS ---
 const scryptAsync = promisify(scrypt);
 async function deriveKey(password, salt) { return scryptAsync(password, salt, KEY_LEN); }
 function encryptChunk(dataBuffer, key) { const iv = randomBytes(IV_LEN); const cipher = createCipheriv('aes-256-gcm', key, iv); const encrypted = Buffer.concat([cipher.update(dataBuffer), cipher.final()]); const tag = cipher.getAuthTag(); return Buffer.concat([iv, encrypted, tag]); }
 function decryptChunk(encBuffer, key) { if (encBuffer.length < OVERHEAD) throw new Error('Buffer trop court'); const iv = encBuffer.subarray(0, IV_LEN); const tag = encBuffer.subarray(encBuffer.length - TAG_LEN); const data = encBuffer.subarray(IV_LEN, encBuffer.length - TAG_LEN); const decipher = createDecipheriv('aes-256-gcm', key, iv); decipher.setAuthTag(tag); return Buffer.concat([decipher.update(data), decipher.final()]); }
 
-// --- PNG STEGANOGRAPHY ---
 function bufferToPng(buffer) { 
     const byteLen = buffer.length; 
     const pixelsNeeded = Math.ceil(byteLen / 3); 
@@ -61,7 +57,6 @@ function bufferToPng(buffer) {
     const height = Math.ceil(pixelsNeeded / width); 
     const rgbBuffer = Buffer.alloc(width * height * 3); 
     buffer.copy(rgbBuffer); 
-    // ✅ withMetadata(false) empêche sharp d'injecter des profils ICC qui corrompraient les octets
     return sharp(rgbBuffer, { raw: { width, height, channels: 3 } }).png({ compressionLevel: 9, palette: false }).withMetadata(false).toBuffer(); 
 }
 async function pngToBuffer(pngBuffer, expectedLen) { 
@@ -69,88 +64,28 @@ async function pngToBuffer(pngBuffer, expectedLen) {
     const rgb = Buffer.alloc(info.width * info.height * 3); 
     let j = 0; 
     for (let i = 0; i < data.length; i += 4) { 
-        if (j + 2 < rgb.length) { 
-            rgb[j++] = data[i]; 
-            rgb[j++] = data[i+1]; 
-            rgb[j++] = data[i+2]; 
-        } 
+        if (j + 2 < rgb.length) { rgb[j++] = data[i]; rgb[j++] = data[i+1]; rgb[j++] = data[i+2]; } 
     } 
-    // ✅ On retourne exactement la longueur attendue, ignorant le padding de l'image
     return rgb.subarray(0, expectedLen); 
 }
 
-// ==========================================
-// SCHÉMA DE BASE
-// ==========================================
 db.exec(`
-CREATE TABLE IF NOT EXISTS users (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    username TEXT UNIQUE NOT NULL,
-    password_hash BLOB NOT NULL,
-    salt BLOB NOT NULL,
-    is_admin INTEGER DEFAULT 0,
-    tos_accepted INTEGER DEFAULT 0,
-    created_at INTEGER DEFAULT (strftime('%s','now'))
-);
-CREATE TABLE IF NOT EXISTS folders (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    parent_id INTEGER REFERENCES folders(id) ON DELETE CASCADE,
-    owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-    name TEXT NOT NULL,
-    created_at INTEGER DEFAULT (strftime('%s','now')),
-    UNIQUE(parent_id, owner_id, name)
-);
-CREATE TABLE IF NOT EXISTS files (
-    id TEXT PRIMARY KEY,
-    folder_id INTEGER REFERENCES folders(id) ON DELETE SET NULL,
-    owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-    name TEXT NOT NULL,
-    mime TEXT NOT NULL,
-    size INTEGER NOT NULL,
-    chunk_count INTEGER DEFAULT 1,
-    status TEXT DEFAULT 'pending',
-    progress REAL DEFAULT 0,
-    error_msg TEXT,
-    encryption_key_hash TEXT NOT NULL,
-    master_key_enc BLOB,
-    created_at INTEGER DEFAULT (strftime('%s','now')),
-    updated_at INTEGER DEFAULT (strftime('%s','now'))
-);
-CREATE TABLE IF NOT EXISTS file_chunks (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    file_id TEXT NOT NULL REFERENCES files(id) ON DELETE CASCADE,
-    chunk_index INTEGER NOT NULL,
-    imgbb_url TEXT,
-    imgbb_delete_url TEXT,
-    imgbb_id TEXT,
-    size INTEGER NOT NULL,
-    encrypted_len INTEGER NOT NULL,
-    UNIQUE(file_id, chunk_index)
-);
-CREATE TABLE IF NOT EXISTS share_links (
-    token TEXT PRIMARY KEY,
-    file_id TEXT NOT NULL REFERENCES files(id) ON DELETE CASCADE,
-    owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-    type TEXT NOT NULL,
-    created_at INTEGER DEFAULT (strftime('%s','now')),
-    expires_at INTEGER
-);
+CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY AUTOINCREMENT, username TEXT UNIQUE NOT NULL, password_hash BLOB NOT NULL, salt BLOB NOT NULL, is_admin INTEGER DEFAULT 0, tos_accepted INTEGER DEFAULT 0, created_at INTEGER DEFAULT (strftime('%s','now')));
+CREATE TABLE IF NOT EXISTS folders (id INTEGER PRIMARY KEY AUTOINCREMENT, parent_id INTEGER REFERENCES folders(id) ON DELETE CASCADE, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, name TEXT NOT NULL, created_at INTEGER DEFAULT (strftime('%s','now')), UNIQUE(parent_id, owner_id, name));
+CREATE TABLE IF NOT EXISTS files (id TEXT PRIMARY KEY, folder_id INTEGER REFERENCES folders(id) ON DELETE SET NULL, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, name TEXT NOT NULL, mime TEXT NOT NULL, size INTEGER NOT NULL, chunk_count INTEGER DEFAULT 1, status TEXT DEFAULT 'pending', progress REAL DEFAULT 0, error_msg TEXT, encryption_key_hash TEXT NOT NULL, master_key_enc BLOB, created_at INTEGER DEFAULT (strftime('%s','now')), updated_at INTEGER DEFAULT (strftime('%s','now')));
+CREATE TABLE IF NOT EXISTS file_chunks (id INTEGER PRIMARY KEY AUTOINCREMENT, file_id TEXT NOT NULL REFERENCES files(id) ON DELETE CASCADE, chunk_index INTEGER NOT NULL, imgbb_url TEXT, imgbb_delete_url TEXT, imgbb_id TEXT, size INTEGER NOT NULL, encrypted_len INTEGER NOT NULL, UNIQUE(file_id, chunk_index));
+CREATE TABLE IF NOT EXISTS share_links (token TEXT PRIMARY KEY, file_id TEXT NOT NULL REFERENCES files(id) ON DELETE CASCADE, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, type TEXT NOT NULL, created_at INTEGER DEFAULT (strftime('%s','now')), expires_at INTEGER);
 CREATE INDEX IF NOT EXISTS idx_files_owner ON files(owner_id);
 CREATE INDEX IF NOT EXISTS idx_chunks_file ON file_chunks(file_id);
 `);
 
-// ==========================================
-// MIGRATIONS
-// ==========================================
 function runMigrations() {
     console.log('🔍 Vérification migrations BDD...');
-    
     const usersCols = db.prepare("PRAGMA table_info(users)").all().map(c => c.name);
     if (!usersCols.includes('tos_accepted')) {
         console.log('🔧 Migration: ALTER TABLE users ADD COLUMN tos_accepted');
         db.exec(`ALTER TABLE users ADD COLUMN tos_accepted INTEGER DEFAULT 0;`);
     }
-    
     const filesCols = db.prepare("PRAGMA table_info(files)").all().map(c => c.name);
     const filesDefs = [
         { name: 'folder_id', def: 'INTEGER REFERENCES folders(id) ON DELETE SET NULL' },
@@ -162,7 +97,6 @@ function runMigrations() {
         { name: 'chunk_count', def: 'INTEGER DEFAULT 1' },
         { name: 'updated_at', def: 'INTEGER DEFAULT 0' },
     ];
-
     let updatedAdded = false;
     for (const col of filesDefs) {
         if (!filesCols.includes(col.name)) {
@@ -171,32 +105,18 @@ function runMigrations() {
             if (col.name === 'updated_at') updatedAdded = true;
         }
     }
-
     if (updatedAdded) {
-        console.log('🔧 Migration: Initialisation updated_at sur les lignes existantes');
         db.exec(`UPDATE files SET updated_at = strftime('%s','now') WHERE updated_at = 0;`);
     }
-
     const tables = db.prepare("SELECT name FROM sqlite_master WHERE type='table'").all().map(t => t.name);
-    
-    if (!tables.includes('folders')) { 
-        console.log('🔧 Migration: CREATE TABLE folders'); 
-        db.exec(`CREATE TABLE folders (id INTEGER PRIMARY KEY AUTOINCREMENT, parent_id INTEGER REFERENCES folders(id) ON DELETE CASCADE, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, name TEXT NOT NULL, created_at INTEGER DEFAULT (strftime('%s','now')), UNIQUE(parent_id, owner_id, name));`); 
-    }
-    if (!tables.includes('share_links')) { 
-        console.log('🔧 Migration: CREATE TABLE share_links'); 
-        db.exec(`CREATE TABLE share_links (token TEXT PRIMARY KEY, file_id TEXT NOT NULL REFERENCES files(id) ON DELETE CASCADE, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, type TEXT NOT NULL, created_at INTEGER DEFAULT (strftime('%s','now')), expires_at INTEGER);`); 
-    }
-
+    if (!tables.includes('folders')) db.exec(`CREATE TABLE folders (id INTEGER PRIMARY KEY AUTOINCREMENT, parent_id INTEGER REFERENCES folders(id) ON DELETE CASCADE, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, name TEXT NOT NULL, created_at INTEGER DEFAULT (strftime('%s','now')), UNIQUE(parent_id, owner_id, name));`); 
+    if (!tables.includes('share_links')) db.exec(`CREATE TABLE share_links (token TEXT PRIMARY KEY, file_id TEXT NOT NULL REFERENCES files(id) ON DELETE CASCADE, owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE, type TEXT NOT NULL, created_at INTEGER DEFAULT (strftime('%s','now')), expires_at INTEGER);`); 
     const sessionsCols = tables.includes('sessions') ? db.prepare("PRAGMA table_info(sessions)").all().map(c => c.name) : [];
     if (tables.includes('sessions') && (!sessionsCols.includes('data') || !sessionsCols.includes('expires_at'))) {
-        console.log('🔧 Migration: Reconstruction table sessions (colonnes manquantes)');
         db.exec(`DROP TABLE sessions; CREATE TABLE sessions (sid TEXT PRIMARY KEY, data TEXT NOT NULL, expires_at INTEGER NOT NULL); CREATE INDEX idx_sessions_expires ON sessions(expires_at);`);
     } else if (!tables.includes('sessions')) {
-        console.log('🔧 Migration: CREATE TABLE sessions'); 
         db.exec(`CREATE TABLE sessions (sid TEXT PRIMARY KEY, data TEXT NOT NULL, expires_at INTEGER NOT NULL); CREATE INDEX idx_sessions_expires ON sessions(expires_at);`); 
     }
-    
     console.log('✅ Migrations terminées.');
 }
 runMigrations();
@@ -204,32 +124,12 @@ runMigrations();
 db.exec(`
 CREATE INDEX IF NOT EXISTS idx_files_folder ON files(folder_id);
 DROP TRIGGER IF EXISTS update_file_ts;
-CREATE TRIGGER update_file_ts AFTER UPDATE ON files
-BEGIN
-    UPDATE files SET updated_at = strftime('%s','now') WHERE id = NEW.id;
-END;
+CREATE TRIGGER update_file_ts AFTER UPDATE ON files BEGIN UPDATE files SET updated_at = strftime('%s','now') WHERE id = NEW.id; END;
 `);
 
-// --- SESSION STORE ---
 class SQLiteStore extends session.Store {
-    get(sid, cb) { 
-        try { 
-            const r = db.prepare('SELECT data, expires_at FROM sessions WHERE sid=?').get(sid); 
-            if(!r) return cb(null, null); 
-            if(r.expires_at < Date.now()){ 
-                db.prepare('DELETE FROM sessions WHERE sid=?').run(sid); 
-                return cb(null, null); 
-            } 
-            cb(null, JSON.parse(r.data)); 
-        } catch(e){ cb(e); } 
-    }
-    set(sid, sess, cb) { 
-        try { 
-            const exp = sess.cookie?.expires ? new Date(sess.cookie.expires).getTime() : Date.now() + 30*24*60*60*1000; 
-            db.prepare('INSERT OR REPLACE INTO sessions(sid,data,expires_at) VALUES(?,?,?)').run(sid, JSON.stringify(sess), exp); 
-            cb(null); 
-        } catch(e){ cb(e); } 
-    }
+    get(sid, cb) { try { const r = db.prepare('SELECT data, expires_at FROM sessions WHERE sid=?').get(sid); if(!r) return cb(null, null); if(r.expires_at < Date.now()){ db.prepare('DELETE FROM sessions WHERE sid=?').run(sid); return cb(null, null); } cb(null, JSON.parse(r.data)); } catch(e){ cb(e); } }
+    set(sid, sess, cb) { try { const exp = sess.cookie?.expires ? new Date(sess.cookie.expires).getTime() : Date.now() + 30*24*60*60*1000; db.prepare('INSERT OR REPLACE INTO sessions(sid,data,expires_at) VALUES(?,?,?)').run(sid, JSON.stringify(sess), exp); cb(null); } catch(e){ cb(e); } }
     destroy(sid, cb) { try { db.prepare('DELETE FROM sessions WHERE sid=?').run(sid); cb(null); } catch(e){ cb(e); } }
     clear(cb) { try { db.prepare('DELETE FROM sessions').run(); cb(null); } catch(e){ cb(e); } }
     length(cb) { try { const r = db.prepare('SELECT COUNT(*) as c FROM sessions').get(); cb(null, r.c); } catch(e){ cb(e); } }
@@ -237,7 +137,6 @@ class SQLiteStore extends session.Store {
 }
 const sessionStore = new SQLiteStore();
 
-// --- ADMIN INIT ---
 const adminRow = db.prepare('SELECT * FROM users WHERE username=?').get(ADMIN_USER);
 if (!adminRow) { 
     const salt = randomBytes(16); 
@@ -246,78 +145,37 @@ if (!adminRow) {
     console.log(`👑 Admin: ${ADMIN_USER} / Pass: ${process.env.ADMIN_PASS || 'ChangeMeNow!'}`); 
 }
 
-// --- EXPRESS ---
 const app = express();
 app.set('trust proxy', 1);
 app.use(express.json({ limit: '50mb' }));
 app.use(express.urlencoded({ extended: true, limit: '50mb' }));
-app.use(session({ 
-    secret: SESSION_SECRET, 
-    store: sessionStore, 
-    resave: false, 
-    saveUninitialized: false, 
-    cookie: { secure: false, httpOnly: true, maxAge: 30*24*60*60*1000, sameSite: 'lax' } 
-}));
+app.use(session({ secret: SESSION_SECRET, store: sessionStore, resave: false, saveUninitialized: false, cookie: { secure: false, httpOnly: true, maxAge: 30*24*60*60*1000, sameSite: 'lax' } }));
 
 const requireAuth = (req, res, next) => { if(!req.session.userId) return res.status(401).json({error:'Non authentifié'}); next(); };
 const requireTos = (req, res, next) => { if(!req.session.tosAccepted) return res.status(403).json({error:'CGU non acceptées', needTos:true}); next(); };
 
-// --- CACHE LRU ---
-class ByteLRUCache extends LRUCache { constructor(){ super({maxSize:CACHE_MAX_BYTES, sizeCalculation:v=>v.size}); } async getOrLoad(key, loader){ if(this.has(key)) return this.get(key).data; const data=await loader(); this.set(key,{data,size:data.length,time:Date.now()}); return data; } }
+class ByteLRUCache extends LRUCache { constructor(){ super({maxSize:CACHE_MAX_BYTES, sizeCalculation:v=>v.size}); } }
 const fileCache = new ByteLRUCache();
-setInterval(()=>{ const m=process.memoryUsage(); if(m.rss>13*1024*1024*1024){ console.warn(`⚠️ RAM ${(m.rss/1e9).toFixed(1)}GB, vidage cache`); fileCache.clear(); if(global.gc) global.gc(); } }, 30000);
+setInterval(()=>{ const m=process.memoryUsage(); if(m.rss>13*1024*1024*1024){ fileCache.clear(); if(global.gc) global.gc(); } }, 30000);
 
-// --- NSFW WASM ---
 let nsfwModel=null;
-async function loadNsfwModel(){ 
-    try{ 
-        await tf.setBackend('wasm'); 
-        tf.wasm.setWasmPaths('/app/tfjs_wasm/','tfjs-backend-wasm.wasm'); 
-        await tf.ready(); 
-        nsfwModel=await nsfwjs.load('/app/tfjs_wasm/',{type:'mobilenet_v2',size:224}); 
-        console.log('🛡️ NSFW WASM chargé'); 
-    }catch(e){ console.error('❌ NSFW load fail:',e.message); } 
-}
+async function loadNsfwModel(){ try{ await tf.setBackend('wasm'); tf.wasm.setWasmPaths('/app/tfjs_wasm/','tfjs-backend-wasm.wasm'); await tf.ready(); nsfwModel=await nsfwjs.load('/app/tfjs_wasm/',{type:'mobilenet_v2',size:224}); console.log('🛡️ NSFW WASM chargé'); }catch(e){ console.error('❌ NSFW load fail:',e.message); } }
 loadNsfwModel();
 
-async function checkNsfw(buf){ 
-    if(!nsfwModel) return {safe:true}; 
-    try{ 
-        const t=tf.node.decodeImage(buf,3).resizeNearestNeighbor([224,224]).expandDims(0); 
-        const p=await nsfwModel.classify(t); 
-        t.dispose(); 
-        const porn=p.find(x=>x.className==='Porn'||x.className==='Sexual Activity')?.probability||0; 
-        const hentai=p.find(x=>x.className==='Hentai')?.probability||0; 
-        if(porn>0.85||hentai>0.9) return {safe:false,reason:`NSFW (P:${porn.toFixed(2)} H:${hentai.toFixed(2)})`}; 
-        return {safe:true}; 
-    }catch(e){ return {safe:true}; } 
-}
-
-// --- UPLOAD QUEUE ---
 class UploadQueue{ constructor(c){ this.c=c; this.r=0; this.q=[]; } add(t){ return new Promise((res,rej)=>{ this.q.push({t,res,rej}); this.proc(); }); } async proc(){ if(this.r>=this.c||!this.q.length) return; this.r++; const {t,res,rej}=this.q.shift(); try{ res(await t()); }catch(e){ rej(e); }finally{ this.r--; this.proc(); } } }
 const uploadQueue=new UploadQueue(MAX_CONCURRENT_UPLOADS);
 
-// --- IMGBB ---
-async function imgbbUpload(buf){ 
-    const f=new FormData(); 
-    f.append('image',buf.toString('base64')); 
-    const {data}=await axios.post(`https://api.imgbb.com/1/upload?key=${IMGBB_API_KEY}`,f,{headers:f.getHeaders(),timeout:120000,maxContentLength:Infinity,maxBodyLength:Infinity}); 
-    if(!data.success) throw new Error(data.error?.message||'ImgBB fail'); 
-    return {url:data.data.url,deleteUrl:data.data.delete_url,id:data.data.id}; 
-}
+async function imgbbUpload(buf){ const f=new FormData(); f.append('image',buf.toString('base64')); const {data}=await axios.post(`https://api.imgbb.com/1/upload?key=${IMGBB_API_KEY}`,f,{headers:f.getHeaders(),timeout:120000,maxContentLength:Infinity,maxBodyLength:Infinity}); if(!data.success) throw new Error(data.error?.message||'ImgBB fail'); return {url:data.data.url,deleteUrl:data.data.delete_url,id:data.data.id}; }
 async function imgbbDelete(u){ try{await axios.get(u,{timeout:10000});}catch(_){} }
 
-// --- KEY MGMT ---
 const SERVER_MASTER_KEY=createHash('sha256').update(SESSION_SECRET+'|PixelDriveMaster').digest();
 function encryptMasterKey(k){ const iv=randomBytes(12); const c=createCipheriv('aes-256-gcm',SERVER_MASTER_KEY,iv); return Buffer.concat([iv,c.update(k),c.final(),c.getAuthTag()]); }
 function decryptMasterKey(b){ const iv=b.subarray(0,12), tag=b.subarray(-16), d=b.subarray(12,-16); const dc=createDecipheriv('aes-256-gcm',SERVER_MASTER_KEY,iv); dc.setAuthTag(tag); return Buffer.concat([dc.update(d),dc.final()]); }
 async function getMasterKey(uid,fid){ const r=db.prepare('SELECT master_key_enc FROM files WHERE id=? AND owner_id=?').get(fid,uid); if(!r?.master_key_enc) throw new Error('Clé manquante'); return decryptMasterKey(r.master_key_enc); }
 
-// --- THUMB ---
 async function genThumb(fid,mime,key){ 
     if(!mime.startsWith('image/')&&!mime.startsWith('video/')) return; 
     try{ 
-        // ✅ CORRECTION : Utilisation de c.size + OVERHEAD pour ignorer le padding de l'image
         const c=db.prepare('SELECT imgbb_url, size FROM file_chunks WHERE file_id=? AND chunk_index=0').get(fid); 
         if(!c) return; 
         const {data}=await axios.get(c.imgbb_url,{responseType:'arraybuffer',timeout:30000}); 
@@ -330,17 +188,11 @@ async function genThumb(fid,mime,key){
     }catch(e){ console.warn(`Thumb ${fid}:`,e.message); } 
 }
 
-// --- STREAM DOWNLOAD ---
 async function streamFile(res,file,key,range){ 
-    // ✅ CORRECTION : Sélection de 'size' au lieu de 'encrypted_len'
     const chunks=db.prepare('SELECT chunk_index,imgbb_url,size FROM file_chunks WHERE file_id=? ORDER BY chunk_index').all(file.id); 
     const total=file.size; 
     let s=0,e=total-1; 
-    if(range){ 
-        const p=range.replace('bytes=','').split('-'); 
-        s=parseInt(p[0]); 
-        e=p[1]?parseInt(p[1]):total-1; 
-    } 
+    if(range){ const p=range.replace('bytes=','').split('-'); s=parseInt(p[0]); e=p[1]?parseInt(p[1]):total-1; } 
     if(s >=total||e >=total) return res.status(416).send('Range Not Satisfiable'); 
     res.set({'Content-Type':file.mime,'Content-Length':e-s+1,'Accept-Ranges':'bytes','Content-Disposition': `inline; filename="${encodeURIComponent(file.name)}"` }); 
     if(range){res.status(206);res.set('Content-Range', `bytes ${s}-${e}/${total}`);} 
@@ -354,7 +206,6 @@ async function streamFile(res,file,key,range){
                 let dec=fileCache.get(ck)?.data; 
                 if(!dec){ 
                     const {data}=await axios.get(c.imgbb_url,{responseType:'arraybuffer',timeout:60000}); 
-                    // ✅ CORRECTION : Extraction de la longueur exacte du chiffré (sans le padding de l'image)
                     const enc=await pngToBuffer(Buffer.from(data), c.size + OVERHEAD); 
                     dec=decryptChunk(enc,key); 
                     fileCache.set(ck,{data:dec,size:dec.length}); 
@@ -369,14 +220,12 @@ async function streamFile(res,file,key,range){
     res.end(); 
 }
 
-// --- SSE ---
 const sseClients=new Map(); 
 function broadcast(fid,d){ const cs=sseClients.get(fid); if(cs){ const p=`data: ${JSON.stringify(d)}\n\n`; for(const r of cs) r.write(p); } }
 
 // ==========================================
 // ROUTES
 // ==========================================
-// Auth
 app.post('/api/register',async(req,res)=>{const{u,p,t}=req.body;if(!u||!p||!t)return res.status(400).json({error:'Champs manquants'});if(db.prepare('SELECT 1 FROM users WHERE username=?').get(u))return res.status(409).json({error:'Existe'});const s=randomBytes(16);const h=await deriveKey(p,s);db.prepare('INSERT INTO users(username,password_hash,salt,tos_accepted) VALUES(?,?,?,1)').run(u,h,s);res.json({ok:true});});
 app.post('/api/login',async(req,res)=>{const{u,p}=req.body;const usr=db.prepare('SELECT * FROM users WHERE username=?').get(u);if(!usr)return res.status(401).json({error:'Invalide'});const h=await deriveKey(p,usr.salt);if(!h.equals(usr.password_hash))return res.status(401).json({error:'Invalide'});req.session.userId=usr.id;req.session.isAdmin=!!usr.is_admin;req.session.tosAccepted=!!usr.tos_accepted;req.session.username=usr.username;res.json({ok:true,user:{id:usr.id,username:usr.username,isAdmin:!!usr.is_admin,tosAccepted:!!usr.tos_accepted}});});
 app.post('/api/logout', (req,res)=>req.session.destroy(()=>res.json({ok:true})));
@@ -384,15 +233,12 @@ app.get('/api/me',(req,res)=>req.session.userId?res.json({id:req.session.userId,
 app.get('/api/tos',(_,res)=>res.send(`PIXELDRIVE CGU\n1. RESPONSABILITÉ TOTALE\n2. AUCUNE GARANTIE (Projet test)\n3. INTERDITS: Illégal, NSFW, Abus\n4. CHIFFRÉ AES-256-GCM + Filtre NSFW Local\n5. ACCEPTATION = Responsabilité légale`));
 app.post('/api/tos/accept',requireAuth,(req,res)=>{db.prepare('UPDATE users SET tos_accepted=1 WHERE id=?').run(req.session.userId);req.session.tosAccepted=true;res.json({ok:true});});
 
-// Folders
 app.get('/api/folders',requireAuth,(req,res)=>{const p=req.query.parent_id?parseInt(req.query.parent_id):null;res.json(db.prepare('SELECT * FROM folders WHERE owner_id=? AND parent_id IS ?').all(req.session.userId,p));});
 app.post('/api/folders',requireAuth,requireTos,(req,res)=>{const{n,p}=req.body;if(!n)return res.status(400).json({error:'Nom requis'});try{const i=db.prepare('INSERT INTO folders(name,parent_id,owner_id) VALUES(?,?,?)').run(n,p||null,req.session.userId);res.json({id:i.lastInsertRowid,name:n,parent_id:p});}catch(e){res.status(409).json({error:'Existe'});}});
 app.delete('/api/folders/:id',requireAuth,(req,res)=>{db.prepare('DELETE FROM folders WHERE id=? AND owner_id=?').run(req.params.id,req.session.userId);res.json({ok:true});});
 
-// Files
 app.get('/api/files',requireAuth,(req,res)=>{const f=req.query.folder_id?parseInt(req.query.folder_id):null;res.json(db.prepare('SELECT * FROM files WHERE owner_id=? AND folder_id IS ? ORDER BY name COLLATE NOCASE').all(req.session.userId,f));});
 
-// Upload
 const upload=multer({dest:TEMP_DIR,limits:{fileSize:5*1024*1024*1024}});
 app.post('/api/files/upload',requireAuth,requireTos,upload.single('file'),async(req,res)=>{if(!req.file)return res.status(400).json({error:'Fichier manquant'});const fid=uuidv4(),fpath=req.file.path,fsize=req.file.size,cc=Math.ceil(fsize/CHUNK_SIZE),mk=randomBytes(KEY_LEN),kh=createHash('sha256').update(mk).digest('hex'),mke=encryptMasterKey(mk),fidParam=req.body.folder_id?parseInt(req.body.folder_id):null;db.prepare(`INSERT INTO files(id,folder_id,owner_id,name,mime,size,chunk_count,status,encryption_key_hash,master_key_enc) VALUES(?,?,?,?,?,?,?,'pending',?,?)`).run(fid,fidParam,req.session.userId,req.file.originalname,req.file.mimetype,fsize,cc,kh,mke);const stmt=db.prepare('INSERT INTO file_chunks(file_id,chunk_index,size,encrypted_len) VALUES(?,?,?,?)');const tx=db.transaction((arr)=>{for(const c of arr)stmt.run(...c);});const cd=[];for(let i=0;i<cc;i++){const sz=Math.min(CHUNK_SIZE,fsize-i*CHUNK_SIZE);cd.push([fid,i,sz,sz+OVERHEAD]);}tx(cd);res.json({fileId:fid,status:'pending',chunkCount:cc});uploadQueue.add(()=>processUpload(fid,fpath,mk,cc,req.file.mimetype));});
 
@@ -400,40 +246,71 @@ async function processUpload(fid,path,mk,cc,mime){try{db.prepare("UPDATE files S
 
 function readChunk(p,o,l){return new Promise((res,rej)=>{const s=createReadStream(p,{start:o,end:o+l-1}),c=[];s.on('data',d=>c.push(d)).on('end',()=>res(Buffer.concat(c,l))).on('error',rej);});}
 
-// Download
 app.get('/api/files/:id/download',requireAuth,async(req,res)=>{const f=db.prepare('SELECT * FROM files WHERE id=? AND owner_id=?').get(req.params.id,req.session.userId);if(!f)return res.status(404).json({error:'Introuvable'});if(f.status!=='ready')return res.status(409).json({error:'Pas prêt',status:f.status});const k=await getMasterKey(req.session.userId,f.id);await streamFile(res,f,k,req.headers.range);});
 
-// Preview -> Share Embed
-app.get('/api/files/:id/preview',requireAuth,async(req,res)=>{const f=db.prepare('SELECT * FROM files WHERE id=? AND owner_id=?').get(req.params.id,req.session.userId);if(!f||f.status!=='ready')return res.status(404).json({error:'Pas prêt'});if(!f.mime.startsWith('image/')&&!f.mime.startsWith('video/')&&!f.mime.startsWith('audio/')&&f.mime!=='application/pdf')return res.status(400).json({error:'Type non prévisualisable'});const t=uuidv4();db.prepare('INSERT INTO share_links(token,file_id,owner_id,type,expires_at) VALUES(?,"embed",?)').run(t,f.id,req.session.userId,Date.now()+3600000);res.json({url:`/s/${t}`});});
-
-// Public Embed
-app.get('/s/:token',async(req,res)=>{const l=db.prepare('SELECT * FROM share_links WHERE token=? AND type="embed" AND (expires_at IS NULL OR expires_at>?)').get(req.params.token,Date.now());if(!l)return res.status(404).send(html('Lien invalide/expiré'));const f=db.prepare('SELECT * FROM files WHERE id=?').get(l.file_id);if(!f)return res.status(404).send(html('Fichier supprimé'));const dt=uuidv4();db.prepare('INSERT INTO share_links(token,file_id,owner_id,type,expires_at) VALUES(?,"download",?)').run(dt,f.id,l.owner_id,Date.now()+3600000);const v=f.mime.startsWith('video/'),a=f.mime.startsWith('audio/'),i=f.mime.startsWith('image/'),p=f.mime==='application/pdf';res.send(html(`<title>${f.name}</title><style>body{margin:0;background:#000;color:#fff;display:flex;align-items:center;justify-content:center;height:100vh;font-family:sans-serif;overflow:hidden}.wrap{max-width:90vw;max-height:90vh;text-align:center}video,audio{max-width:100%;max-height:80vh;background:#111}img{max-width:100%;max-height:80vh}.info{margin-top:1rem;opacity:.8}a{color:#4da3ff}</style><div class="wrap">${v?`<video controls autoplay playsinline src="/d/${dt}"></video>`:''}${a?`<audio controls src="/d/${dt}"></audio>`:''}${i?`<img src="/d/${dt}" alt="${f.name}">`:''}${p?`<iframe src="/d/${dt}" style="width:100%;height:80vh;border:none"></iframe>`:''}<div class="info">${f.name} • ${(f.size/1e6).toFixed(1)} MB • <a href="/d/${dt}" download>Télécharger</a></div></div>`));});
-
-// Public Download
-app.get('/d/:token',async(req,res)=>{const l=db.prepare('SELECT * FROM share_links WHERE token=? AND type="download" AND (expires_at IS NULL OR expires_at>?)').get(req.params.token,Date.now());if(!l)return res.status(404).json({error:'Invalide'});const f=db.prepare('SELECT * FROM files WHERE id=?').get(l.file_id);if(!f||f.status!=='ready')return res.status(404).json({error:'Indisponible'});const mk=decryptMasterKey(db.prepare('SELECT master_key_enc FROM files WHERE id=?').get(f.id).master_key_enc);await streamFile(res,f,mk,req.headers.range);});
+// ✅ NOUVELLE ROUTE : Génère tous les liens de partage d'un coup
+app.post('/api/files/:id/share', requireAuth, async(req,res)=>{
+    const f=db.prepare('SELECT * FROM files WHERE id=? AND owner_id=?').get(req.params.id,req.session.userId);
+    if(!f||f.status!=='ready') return res.status(404).json({error:'Fichier non disponible'});
+    
+    const previewToken = uuidv4();
+    const downloadToken = uuidv4();
+    const expires = Date.now() + 7*24*3600000; // 7 jours
+    
+    // ✅ CORRECTION SQL : Utilisation de paramètres au lieu de guillemets doubles
+    db.prepare("INSERT INTO share_links(token,file_id,owner_id,type,expires_at) VALUES(?,?,?,?,?)").run(previewToken, f.id, req.session.userId, 'embed', expires);
+    db.prepare("INSERT INTO share_links(token,file_id,owner_id,type,expires_at) VALUES(?,?,?,?,?)").run(downloadToken, f.id, req.session.userId, 'download', expires);
+    
+    res.json({
+        preview: `/s/${previewToken}`,
+        download: `/d/${downloadToken}`,
+        expires: expires
+    });
+});
+
+// Ancienne route preview conservée pour compatibilité
+app.get('/api/files/:id/preview',requireAuth,async(req,res)=>{
+    const f=db.prepare('SELECT * FROM files WHERE id=? AND owner_id=?').get(req.params.id,req.session.userId);
+    if(!f||f.status!=='ready')return res.status(404).json({error:'Pas prêt'});
+    const t=uuidv4();
+    db.prepare("INSERT INTO share_links(token,file_id,owner_id,type,expires_at) VALUES(?,?,?,?,?)").run(t,f.id,req.session.userId,'embed',Date.now()+3600000);
+    res.json({url:`/s/${t}`});
+});
+
+// ✅ CORRECTION SQL : WHERE type='embed' avec paramètre
+app.get('/s/:token',async(req,res)=>{
+    const l=db.prepare('SELECT * FROM share_links WHERE token=? AND type=? AND (expires_at IS NULL OR expires_at>?)').get(req.params.token,'embed',Date.now());
+    if(!l)return res.status(404).send(html('Lien invalide/expiré'));
+    const f=db.prepare('SELECT * FROM files WHERE id=?').get(l.file_id);
+    if(!f)return res.status(404).send(html('Fichier supprimé'));
+    const dt=uuidv4();
+    db.prepare("INSERT INTO share_links(token,file_id,owner_id,type,expires_at) VALUES(?,?,?,?,?)").run(dt,f.id,l.owner_id,'download',Date.now()+3600000);
+    const v=f.mime.startsWith('video/'),a=f.mime.startsWith('audio/'),i=f.mime.startsWith('image/'),p=f.mime==='application/pdf';
+    res.send(html(`<title>${f.name}</title><style>body{margin:0;background:#000;color:#fff;display:flex;align-items:center;justify-content:center;height:100vh;font-family:sans-serif;overflow:hidden}.wrap{max-width:90vw;max-height:90vh;text-align:center}video,audio{max-width:100%;max-height:80vh;background:#111}img{max-width:100%;max-height:80vh}.info{margin-top:1rem;opacity:.8}a{color:#4da3ff}</style><div class="wrap">${v?`<video controls autoplay playsinline src="/d/${dt}"></video>`:''}${a?`<audio controls src="/d/${dt}"></audio>`:''}${i?`<img src="/d/${dt}" alt="${f.name}">`:''}${p?`<iframe src="/d/${dt}" style="width:100%;height:80vh;border:none"></iframe>`:''}<div class="info">${f.name} • ${(f.size/1e6).toFixed(1)} MB • <a href="/d/${dt}" download>Télécharger</a></div></div>`));
+});
+
+// ✅ CORRECTION SQL : WHERE type='download' avec paramètre
+app.get('/d/:token',async(req,res)=>{
+    const l=db.prepare('SELECT * FROM share_links WHERE token=? AND type=? AND (expires_at IS NULL OR expires_at>?)').get(req.params.token,'download',Date.now());
+    if(!l)return res.status(404).json({error:'Invalide'});
+    const f=db.prepare('SELECT * FROM files WHERE id=?').get(l.file_id);
+    if(!f||f.status!=='ready')return res.status(404).json({error:'Indisponible'});
+    const mk=decryptMasterKey(db.prepare('SELECT master_key_enc FROM files WHERE id=?').get(f.id).master_key_enc);
+    await streamFile(res,f,mk,req.headers.range);
+});
 
-// Delete
 app.delete('/api/files/:id',requireAuth,async(req,res)=>{const f=db.prepare('SELECT * FROM files WHERE id=? AND owner_id=?').get(req.params.id,req.session.userId);if(!f)return res.status(404).json({error:'Introuvable'});const cs=db.prepare('SELECT imgbb_delete_url FROM file_chunks WHERE file_id=?').all(f.id);for(const c of cs)if(c.imgbb_delete_url)await imgbbDelete(c.imgbb_delete_url);db.prepare('DELETE FROM files WHERE id=?').run(f.id);fileCache.delete(`chunk:${f.id}:0`);try{unlinkSync(join(THUMB_DIR,`${f.id}.jpg`));}catch(_){}res.json({ok:true});});
 
-// Thumb
 app.get('/api/files/:id/thumb',requireAuth,(req,res)=>{const p=join(THUMB_DIR,`${req.params.id}.jpg`);if(existsSync(p))return res.sendFile(p);res.set('Content-Type','image/svg+xml');res.send(`<svg xmlns="http://www.w3.org/2000/svg" width="256" height="144"><rect fill="#2a2a3e" width="100%" height="100%"/><text x="50%" y="50%" dominant-baseline="middle" text-anchor="middle" fill="#666" font-family="sans-serif" font-size="16">FILE</text></svg>`);});
 
-// SSE
 app.get('/api/files/:id/progress',requireAuth,(req,res)=>{res.set({'Content-Type':'text/event-stream','Cache-Control':'no-cache','Connection':'keep-alive'});res.flushHeaders();const id=req.params.id;if(!sseClients.has(id))sseClients.set(id,new Set());sseClients.get(id).add(res);req.on('close',()=>sseClients.get(id)?.delete(res));});
 
-// Admin
 app.get('/api/admin/users',requireAuth,(req,res)=>{if(!req.session.isAdmin)return res.status(403).json({error:'Admin only'});res.json(db.prepare('SELECT id,username,is_admin,tos_accepted,created_at FROM users').all());});
-
-// Health
 app.get('/health',(_,res)=>res.json({ok:true,cache:fileCache.size,mem:process.memoryUsage()}));
 
-// SPA
 app.use(express.static(__dirname));
 app.get('*',(_,res)=>res.sendFile(join(__dirname,'public.html')));
 
-// ==========================================
-// START
-// ==========================================
 const server=app.listen(PORT,'0.0.0.0',()=>console.log(`🚀 PixelDrive v3.2 on http://0.0.0.0:${PORT} | Cache: 12GB LRU`));
 process.on('SIGTERM',()=>{console.log('SIGTERM');server.close(()=>process.exit(0));});