fix express proxy headers

README.md

@@ -120,17 +120,14 @@ docker compose up -d
 
 When running ExcaliDash behind Traefik, Nginx, or another reverse proxy, configure both containers so that API + WebSocket calls resolve correctly:
 
-- `FRONTEND_URL` (backend) must match the public URL that users hit (e.g. `https://excalidash.example.com`). This controls CORS and Socket.IO origin checks. **Supports multiple comma-separated URLs** for accessing from different addresses.
+- `FRONTEND_URL` (backend) must match the public URL that users hit (e.g. `https://excalidash.example.com`). This controls CORS and Socket.IO origin checks.
 - `BACKEND_URL` (frontend) tells the Nginx container how to reach the backend from inside Docker/Kubernetes. Override it if your reverse proxy exposes the backend under a different hostname.
 
 ```yaml
 # docker-compose.yml example
 backend:
   environment:
-    # Single URL
     - FRONTEND_URL=https://excalidash.example.com
-    # Or multiple URLs (comma-separated) for local + network access
-    # - FRONTEND_URL=http://localhost:6767,http://192.168.1.100:6767,http://nas.local:6767
 frontend:
   environment:
     # For standard Docker Compose (default)

VERSION

@@ -1 +1 @@
-0.3.2
+0.3.1

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "backend",
-  "version": "0.3.2",
+  "version": "0.3.1",
   "description": "",
   "main": "index.js",
   "scripts": {

backend/src/__tests__/csrf-trust-proxy.test.ts

@@ -51,13 +51,12 @@ describe("Issue #38: CSRF with trust proxy settings", () => {
       .set("X-Forwarded-For", "203.0.113.42, 10.0.0.5, 172.17.0.3")
       .set("User-Agent", "Mozilla/5.0 Test");
 
-    // With trust proxy: 1 in supertest (no real socket), Express takes the last IP
-    // In production with a real connection, behavior differs - the key point is it's NOT the client IP
-    expect(response1.body.ip).toBe("172.17.0.3");
+    // With trust proxy: 1, Express takes second-to-last IP (the external proxy)
+    expect(response1.body.ip).toBe("10.0.0.5");
     console.log(
       "trust proxy: 1 → IP:",
       response1.body.ip,
-      "(not the real client IP)",
+      "(external proxy IP - WRONG)",
     );
 
     // With trust proxy: true
@@ -161,12 +160,10 @@ describe("Issue #38: CSRF with trust proxy settings", () => {
     });
 
     // Client -> Synology (192.168.1.x) -> Docker frontend (192.168.11.x) -> Backend
-    // In supertest without real socket, trust proxy: 1 returns last IP
-    // Key point: it's NOT the real client IP (192.168.0.100)
     await request(app)
       .get("/test")
       .set("X-Forwarded-For", "192.168.0.100, 192.168.1.4, 192.168.11.166");
     console.log("  With trust proxy: 1, Express sees:", seenIp);
-    expect(seenIp).toBe("192.168.11.166"); // Not the real client IP
+    expect(seenIp).toBe("192.168.1.4"); // Proxy IP, not client IP
   });
 });

frontend/package-lock.json

@@ -1,18 +1,18 @@
 {
   "name": "frontend",
-  "version": "0.3.2",
+  "version": "0.1.8",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "frontend",
-      "version": "0.3.2",
+      "version": "0.1.8",
       "dependencies": {
         "@dnd-kit/core": "^6.3.1",
         "@dnd-kit/utilities": "^3.2.2",
         "@excalidraw/excalidraw": "^0.18.0",
         "@types/lodash": "^4.17.20",
-        "axios": "^1.13.5",
+        "axios": "^1.13.2",
         "clsx": "^2.1.1",
         "date-fns": "^4.1.0",
         "lodash": "^4.17.21",
@@ -162,6 +162,7 @@
       "integrity": "sha512-e7jT4DxYvIDLk1ZHmU/m/mB19rex9sv0c2ftBtjSBv+kVM/902eh0fINUzD7UwLLNR+jU585GxUJ8/EBfAM5fw==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.27.1",
         "@babel/generator": "^7.28.5",
@@ -516,6 +517,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=18"
       },
@@ -559,6 +561,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -2609,8 +2612,7 @@
       "resolved": "https://registry.npmjs.org/@types/aria-query/-/aria-query-5.0.4.tgz",
       "integrity": "sha512-rfT93uj5s0PRL7EzccGMs3brplhcrghnDoV26NqKhCAS1hVo+WdNsPvE/yb6ilfr5hi2MEk6d5EWJTKdxg8jVw==",
       "dev": true,
-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
     },
     "node_modules/@types/babel__core": {
       "version": "7.20.5",
@@ -2775,6 +2777,7 @@
       "integrity": "sha512-V0kuGBX3+prX+DQ/7r2qsv1NsdfnCLnTgnRJ1pYnxykBhGMz+qj+box5lq7XsO5mtZsBqpjwwTu/7wszPfMBcw==",
       "devOptional": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@types/prop-types": "*",
         "csstype": "^3.0.2"
@@ -2786,6 +2789,7 @@
       "integrity": "sha512-qW1Mfv8taImTthu4KoXgDfLuk4bydU6Q/TkADnDWWHwi4NX4BR+LWfTp2sVmTqRrsHvyDDTelgelxJ+SsejKKQ==",
       "devOptional": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@types/react": "*"
       }
@@ -2856,6 +2860,7 @@
       "integrity": "sha512-lJi3PfxVmo0AkEY93ecfN+r8SofEqZNGByvHAI3GBLrvt1Cw6H5k1IM02nSzu0RfUafr2EvFSw0wAsZgubNplQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@typescript-eslint/scope-manager": "8.47.0",
         "@typescript-eslint/types": "8.47.0",
@@ -3219,6 +3224,7 @@
       "integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -3269,7 +3275,6 @@
       "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=8"
       }
@@ -3401,13 +3406,13 @@
       }
     },
     "node_modules/axios": {
-      "version": "1.13.5",
-      "resolved": "https://registry.npmjs.org/axios/-/axios-1.13.5.tgz",
-      "integrity": "sha512-cz4ur7Vb0xS4/KUN0tPWe44eqxrIu31me+fbang3ijiNscE129POzipJJA6zniq2C/Z6sJCjMimjS8Lc/GAs8Q==",
+      "version": "1.13.2",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.13.2.tgz",
+      "integrity": "sha512-VPk9ebNqPcy5lRGuSlKx752IlDatOjT9paPlm8A7yOuW2Fbvp4X3JznJtT4f0GzGLLiWE9W8onz51SqLYwzGaA==",
       "license": "MIT",
       "dependencies": {
-        "follow-redirects": "^1.15.11",
-        "form-data": "^4.0.5",
+        "follow-redirects": "^1.15.6",
+        "form-data": "^4.0.4",
         "proxy-from-env": "^1.1.0"
       }
     },
@@ -3499,6 +3504,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.8.25",
         "caniuse-lite": "^1.0.30001754",
@@ -3830,6 +3836,7 @@
       "resolved": "https://registry.npmjs.org/cytoscape/-/cytoscape-3.33.1.tgz",
       "integrity": "sha512-iJc4TwyANnOGR1OmWhsS9ayRS3s+XQ185FmuHObThD+5AeJCakAAbWv8KimMTt08xCCLNgneQwFp+JRJOr9qGQ==",
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=0.10"
       }
@@ -4203,6 +4210,7 @@
       "resolved": "https://registry.npmjs.org/d3-selection/-/d3-selection-3.0.0.tgz",
       "integrity": "sha512-fmTRWbNMmsmWq6xJV8D19U/gw/bwrHfNXxrIN+HfZgnzqTHp9jOmKMhsTUjXOJnZOdZY9Q28y4yebKzqDKlxlQ==",
       "license": "ISC",
+      "peer": true,
       "engines": {
         "node": ">=12"
       }
@@ -4442,8 +4450,7 @@
       "resolved": "https://registry.npmjs.org/dom-accessibility-api/-/dom-accessibility-api-0.5.16.tgz",
       "integrity": "sha512-X7BJ2yElsnOJ30pZF4uIIDfBEVgF4XEBxL9Bxhy6dnrm5hkzqmsWHGTiHqRiITNhMyFLyAiWndIJP7Z1NTteDg==",
       "dev": true,
-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
     },
     "node_modules/dompurify": {
       "version": "3.1.6",
@@ -4662,6 +4669,7 @@
       "integrity": "sha512-BhHmn2yNOFA9H9JmmIVKJmd288g9hrVRDkdoIgRCRuSySRUHH7r/DI6aAXW9T1WwUuY3DFgrcaqB+deURBLR5g==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.8.0",
         "@eslint-community/regexpp": "^4.12.1",
@@ -5495,6 +5503,7 @@
       "resolved": "https://registry.npmjs.org/jotai/-/jotai-2.11.0.tgz",
       "integrity": "sha512-zKfoBBD1uDw3rljwHkt0fWuja1B76R7CjznuBO+mSX6jpsO1EBeWNRKpeaQho9yPI/pvCv4recGfgOXGxwPZvQ==",
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12.20.0"
       },
@@ -5842,7 +5851,6 @@
       "integrity": "sha512-h5bgJWpxJNswbU7qCrV0tIKQCaS3blPDrqKWx+QxzuzL1zGUzij9XCWLrSLsJPu5t+eWA/ycetzYAO5IOMcWAQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "bin": {
         "lz-string": "bin/bin.js"
       }
@@ -6872,6 +6880,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "nanoid": "^3.3.7",
         "picocolors": "^1.0.0",
@@ -7037,7 +7046,6 @@
       "integrity": "sha512-Qb1gy5OrP5+zDf2Bvnzdl3jsTf1qXVMazbvCoKhtKqVs4/YK4ozX4gKQJJVyNe+cajNPn0KoC0MC3FUmaHWEmQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "ansi-regex": "^5.0.1",
         "ansi-styles": "^5.0.0",
@@ -7053,7 +7061,6 @@
       "integrity": "sha512-Cxwpt2SfTzTtXcfOlzGEee8O+c+MmUgGrNiBcXnuWxuFJHe6a5Hz7qwhwe5OgaSYI0IJvkLqWX1ASG+cJOkEiA==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=10"
       },
@@ -7109,6 +7116,7 @@
       "resolved": "https://registry.npmjs.org/react/-/react-18.3.1.tgz",
       "integrity": "sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "loose-envify": "^1.1.0"
       },
@@ -7121,6 +7129,7 @@
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-18.3.1.tgz",
       "integrity": "sha512-5m4nQKp+rZRb09LNH59GM4BxTh9251/ylbKIbpe7TpGxfJ+9kv6BLkLBXIjjspbgbnIBNqlI23tRnTWT0snUIw==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "loose-envify": "^1.1.0",
         "scheduler": "^0.23.2"
@@ -7134,8 +7143,7 @@
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-17.0.2.tgz",
       "integrity": "sha512-w2GsyukL62IJnlaff/nRegPQR94C/XXamvMWmSHRJ4y7Ts/4ocGRmTHvOs8PSE6pB3dWOrD/nueuU5sduBsQ4w==",
       "dev": true,
-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
     },
     "node_modules/react-refresh": {
       "version": "0.18.0",
@@ -7850,6 +7858,7 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -7988,6 +7997,7 @@
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
+      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -8177,6 +8187,7 @@
       "integrity": "sha512-BxAKBWmIbrDgrokdGZH1IgkIk/5mMHDreLDmCJ0qpyJaAteP8NvMhkwr/ZCQNqNH97bw/dANTE9PDzqwJghfMQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "esbuild": "^0.25.0",
         "fdir": "^6.5.0",
@@ -8270,6 +8281,7 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -8596,6 +8608,7 @@
       "integrity": "sha512-JInaHOamG8pt5+Ey8kGmdcAcg3OL9reK8ltczgHTAwNhMys/6ThXHityHxVV2p3fkw/c+MAvBHFVYHFZDmjMCQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "frontend",
   "private": true,
-  "version": "0.3.2",
+  "version": "0.3.1",
   "type": "module",
   "scripts": {
     "dev": "vite",
@@ -19,7 +19,7 @@
     "@dnd-kit/utilities": "^3.2.2",
     "@excalidraw/excalidraw": "^0.18.0",
     "@types/lodash": "^4.17.20",
-    "axios": "^1.13.5",
+    "axios": "^1.13.2",
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",
     "lodash": "^4.17.21",