fix export source and verisoning

Express was not configured to trust proxy headers, causing req.ip to return nginx's internal container IP instead of the actual client IP. In Docker environments, nginx can appear with different internal IPs between requests, causing the CSRF clientId to change and token validation to fail.

VERSION

@@ -1 +1 @@
-0.3.0
+0.3.1

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "backend",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "",
   "main": "index.js",
   "scripts": {

backend/src/index.ts

@@ -48,12 +48,14 @@ const resolveDatabaseUrl = (rawUrl?: string) => {
   const prismaDir = path.resolve(backendRoot, "prisma");
   const normalizedRelative = filePath.replace(/^\.\/?/, "");
   const hasLeadingPrismaDir =
-    normalizedRelative === "prisma" ||
+    normalizedRelative === "prisma" || normalizedRelative.startsWith("prisma/");
-    normalizedRelative.startsWith("prisma/");
 
   const absolutePath = path.isAbsolute(filePath)
     ? filePath
-    : path.resolve(hasLeadingPrismaDir ? backendRoot : prismaDir, normalizedRelative);
+    : path.resolve(
+        hasLeadingPrismaDir ? backendRoot : prismaDir,
+        normalizedRelative,
+      );
 
   return `file:${absolutePath}`;
 };
@@ -129,6 +131,12 @@ const initializeUploadDir = async () => {
 };
 
 const app = express();
+
+// Trust proxy headers (X-Forwarded-For, X-Real-IP) from nginx
+// Required for correct client IP detection when running behind a reverse proxy
+// This fixes CSRF token validation failures in Docker/K8s environments
+app.set("trust proxy", 1);
+
 const httpServer = createServer(app);
 const io = new Server(httpServer, {
   cors: {
@@ -140,7 +148,7 @@ const io = new Server(httpServer, {
 const prisma = new PrismaClient();
 const parseJsonField = <T>(
   rawValue: string | null | undefined,
-  fallback: T
+  fallback: T,
 ): T => {
   if (!rawValue) return fallback;
   try {
@@ -234,7 +242,7 @@ app.use(
     credentials: true,
     allowedHeaders: ["Content-Type", "Authorization", "x-csrf-token"],
     exposedHeaders: ["x-csrf-token"],
-  })
+  }),
 );
 app.use(express.json({ limit: "50mb" }));
 app.use(express.urlencoded({ extended: true, limit: "50mb" }));
@@ -246,8 +254,8 @@ app.use((req, res, next) => {
     if (sizeInMB > 10) {
       console.log(
         `[LARGE REQUEST] ${req.method} ${req.path} - ${sizeInMB.toFixed(
-          2
+          2,
-        )}MB - Content-Length: ${contentLength} bytes`
+        )}MB - Content-Length: ${contentLength} bytes`,
       );
     }
   }
@@ -261,7 +269,7 @@ app.use((req, res, next) => {
   res.setHeader("Referrer-Policy", "strict-origin-when-cross-origin");
   res.setHeader(
     "Permissions-Policy",
-    "geolocation=(), microphone=(), camera=()"
+    "geolocation=(), microphone=(), camera=()",
   );
 
   res.setHeader(
@@ -272,7 +280,7 @@ app.use((req, res, next) => {
       "font-src 'self' https://fonts.gstatic.com; " +
       "img-src 'self' data: blob: https:; " +
       "connect-src 'self' ws: wss:; " +
-    "frame-ancestors 'none';"
+      "frame-ancestors 'none';",
   );
 
   next();
@@ -281,14 +289,17 @@ app.use((req, res, next) => {
 const requestCounts = new Map<string, { count: number; resetTime: number }>();
 const RATE_LIMIT_WINDOW = 15 * 60 * 1000;
 
-setInterval(() => {
+setInterval(
+  () => {
     const now = Date.now();
     for (const [ip, data] of requestCounts.entries()) {
       if (now > data.resetTime) {
         requestCounts.delete(ip);
       }
     }
-}, 5 * 60 * 1000).unref();
+  },
+  5 * 60 * 1000,
+).unref();
 
 const RATE_LIMIT_MAX_REQUESTS = (() => {
   const parsed = Number(process.env.RATE_LIMIT_MAX_REQUESTS);
@@ -355,7 +366,10 @@ app.get("/csrf-token", (req, res) => {
     }
     clientLimit.count++;
   } else {
-    csrfRateLimit.set(ip, { count: 1, resetTime: now + CSRF_RATE_LIMIT_WINDOW });
+    csrfRateLimit.set(ip, {
+      count: 1,
+      resetTime: now + CSRF_RATE_LIMIT_WINDOW,
+    });
   }
 
   // Cleanup old rate limit entries occasionally
@@ -370,7 +384,7 @@ app.get("/csrf-token", (req, res) => {
 
   res.json({
     token,
-    header: getCsrfTokenHeader()
+    header: getCsrfTokenHeader(),
   });
 });
 
@@ -378,7 +392,7 @@ app.get("/csrf-token", (req, res) => {
 const csrfProtectionMiddleware = (
   req: express.Request,
   res: express.Response,
-  next: express.NextFunction
+  next: express.NextFunction,
 ) => {
   // Skip CSRF validation for safe methods (GET, HEAD, OPTIONS)
   // Note: /csrf-token is a GET endpoint, so it's automatically exempt
@@ -471,7 +485,7 @@ const drawingCreateSchema = drawingBaseSchema
     },
     {
       message: "Invalid or malicious drawing data detected",
-    }
+    },
   );
 
 const drawingUpdateSchema = drawingBaseSchema
@@ -521,12 +535,12 @@ const drawingUpdateSchema = drawingBaseSchema
     },
     {
       message: "Invalid or malicious drawing data detected",
-    }
+    },
   );
 
 const respondWithValidationErrors = (
   res: express.Response,
-  issues: z.ZodIssue[]
+  issues: z.ZodIssue[],
 ) => {
   res.status(400).json({
     error: "Invalid drawing payload",
@@ -576,7 +590,7 @@ const verifyDatabaseIntegrityAsync = (filePath: string): Promise<boolean> => {
       path.resolve(__dirname, "./workers/db-verify.js"),
       {
         workerData: { filePath },
-      }
+      },
     );
     let timeoutHandle: NodeJS.Timeout;
     let settled = false;
@@ -651,7 +665,7 @@ io.on("connection", (socket) => {
       roomUsers.set(roomId, filteredUsers);
 
       io.to(roomId).emit("presence-update", filteredUsers);
-    }
+    },
   );
 
   socket.on("cursor-move", (data) => {
@@ -676,7 +690,7 @@ io.on("connection", (socket) => {
           io.to(roomId).emit("presence-update", users);
         }
       }
-    }
+    },
   );
 
   socket.on("disconnect", () => {
@@ -1067,8 +1081,9 @@ app.get("/export", async (req, res) => {
     res.setHeader("Content-Type", "application/octet-stream");
     res.setHeader(
       "Content-Disposition",
-      `attachment; filename="excalidash-db-${new Date().toISOString().split("T")[0]
+      `attachment; filename="excalidash-db-${
-      }.${extension}"`
+        new Date().toISOString().split("T")[0]
+      }.${extension}"`,
     );
 
     const fileStream = fs.createReadStream(dbPath);
@@ -1090,8 +1105,9 @@ app.get("/export/json", async (req, res) => {
     res.setHeader("Content-Type", "application/zip");
     res.setHeader(
       "Content-Disposition",
-      `attachment; filename="excalidraw-drawings-${new Date().toISOString().split("T")[0]
+      `attachment; filename="excalidraw-drawings-${
-      }.zip"`
+        new Date().toISOString().split("T")[0]
+      }.zip"`,
     );
 
     const archive = archiver("zip", { zlib: { level: 9 } });
@@ -1105,6 +1121,8 @@ app.get("/export/json", async (req, res) => {
 
     const drawingsByCollection: { [key: string]: any[] } = {};
 
+    const exportSource = `${req.protocol}://${req.get("host")}`;
+
     drawings.forEach((drawing: any) => {
       const collectionName = drawing.collection?.name || "Unorganized";
       if (!drawingsByCollection[collectionName]) {
@@ -1112,6 +1130,9 @@ app.get("/export/json", async (req, res) => {
       }
 
       const drawingData = {
+        type: "excalidraw",
+        version: 2,
+        source: exportSource,
         elements: JSON.parse(drawing.elements),
         appState: JSON.parse(drawing.appState),
         files: JSON.parse(drawing.files || "{}"),
@@ -1129,7 +1150,7 @@ app.get("/export/json", async (req, res) => {
         collectionDrawings.forEach((drawing, index) => {
           const fileName = `${drawing.name.replace(
             /[<>:"/\\|?*]/g,
-            "_"
+            "_",
           )}.excalidraw`;
           const filePath = `${folderName}/${fileName}`;
 
@@ -1137,7 +1158,7 @@ app.get("/export/json", async (req, res) => {
             name: filePath,
           });
         });
-      }
+      },
     );
 
     const readmeContent = `ExcaliDash Export
@@ -1201,7 +1222,7 @@ app.post("/import/sqlite", upload.single("db"), async (req, res) => {
     const originalPath = req.file.path;
     const stagedPath = path.join(
       uploadDir,
-      `temp-${Date.now()}-${Math.random().toString(36).slice(2)}.db`
+      `temp-${Date.now()}-${Math.random().toString(36).slice(2)}.db`,
     );
 
     try {
@@ -1228,7 +1249,7 @@ app.post("/import/sqlite", upload.single("db"), async (req, res) => {
       try {
         await fsPromises.access(dbPath);
         await fsPromises.copyFile(dbPath, backupPath);
-      } catch { }
+      } catch {}
 
       await moveFile(stagedPath, dbPath);
     } catch (error) {

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "frontend",
   "private": true,
-  "version": "0.3.0",
+  "version": "0.3.1",
   "type": "module",
   "scripts": {
     "dev": "vite",