refactor: use tmp for temp dirs and add more robust error handling for updateProxyConfig

.vscode/settings.json

@@ -45,6 +45,7 @@
     "Mullvad",
     "mullvadbrowser",
     "nodecar",
+    "nodemon",
     "ntlm",
     "objc",
     "orhun",

nodecar/package.json

@@ -28,8 +28,12 @@
     "get-port": "^7.1.0",
     "nodemon": "^3.1.10",
     "proxy-chain": "^2.5.9",
+    "tmp": "^0.2.3",
     "ts-node": "^10.9.2",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.34.0"
+  },
+  "devDependencies": {
+    "@types/tmp": "^0.2.6"
   }
 }

nodecar/src/proxy-storage.ts

@@ -1,8 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
-import os from "node:os";
+import tmp from "tmp";
 
-// Define the proxy configuration type
 export interface ProxyConfig {
   id: string;
   upstreamUrl: string;
@@ -12,10 +11,11 @@ export interface ProxyConfig {
   pid?: number;
 }
 
-// Path to store proxy configurations
-const STORAGE_DIR = path.join(os.tmpdir(), "donutbrowser", "proxies");
+const STORAGE_DIR = tmp.dirSync({
+  prefix: "donutbrowser-proxies-",
+  unsafeCleanup: true,
+}).name;
 
-// Ensure storage directory exists
 if (!fs.existsSync(STORAGE_DIR)) {
   fs.mkdirSync(STORAGE_DIR, { recursive: true });
 }
@@ -88,7 +88,7 @@ export function listProxyConfigs(): ProxyConfig[] {
         try {
           const content = fs.readFileSync(
             path.join(STORAGE_DIR, file),
-            "utf-8"
+            "utf-8",
           );
           return JSON.parse(content) as ProxyConfig;
         } catch (error) {
@@ -111,14 +111,18 @@ export function listProxyConfigs(): ProxyConfig[] {
 export function updateProxyConfig(config: ProxyConfig): boolean {
   const filePath = path.join(STORAGE_DIR, `${config.id}.json`);
 
-  if (!fs.existsSync(filePath)) {
-    return false;
-  }
-
   try {
+    fs.readFileSync(filePath, "utf-8");
     fs.writeFileSync(filePath, JSON.stringify(config, null, 2));
     return true;
   } catch (error) {
+    if ((error as NodeJS.ErrnoException).code === "ENOENT") {
+      console.error(
+        `Config ${config.id} was deleted while the app was running`,
+      );
+      return false;
+    }
+
     console.error(`Error updating proxy config ${config.id}:`, error);
     return false;
   }
@@ -135,7 +139,7 @@ export function isProcessRunning(pid: number): boolean {
     // but checks if it exists
     process.kill(pid, 0);
     return true;
-  } catch (error) {
+  } catch {
     return false;
   }
 }

pnpm-lock.yaml

@@ -183,6 +183,9 @@ importers:
       proxy-chain:
         specifier: ^2.5.9
         version: 2.5.9
+      tmp:
+        specifier: ^0.2.3
+        version: 0.2.3
       ts-node:
         specifier: ^10.9.2
         version: 10.9.2(@types/node@24.0.1)(typescript@5.8.3)
@@ -192,6 +195,10 @@ importers:
       typescript-eslint:
         specifier: ^8.34.0
         version: 8.34.0(eslint@9.29.0(jiti@2.4.2))(typescript@5.8.3)
+    devDependencies:
+      '@types/tmp':
+        specifier: ^0.2.6
+        version: 0.2.6
 
 packages:
 
@@ -1542,6 +1549,9 @@ packages:
   '@types/react@19.1.8':
     resolution: {integrity: sha512-AwAfQ2Wa5bCx9WP8nZL2uMZWod7J7/JSplxbTmBQ5ms6QpqNYm672H0Vu9ZVKVngQ+ii4R/byguVEUZQyeg44g==}
 
+  '@types/tmp@0.2.6':
+    resolution: {integrity: sha512-chhaNf2oKHlRkDGt+tiKE2Z5aJ6qalm7Z9rlLdBwmOiAAf09YQvvoLXjWK4HWPF1xU/fqvMgfNfpVoBscA/tKA==}
+
   '@typescript-eslint/eslint-plugin@8.34.0':
     resolution: {integrity: sha512-QXwAlHlbcAwNlEEMKQS2RCgJsgXrTJdjXT08xEgbPFa2yYQgVjBymxP5DrfrE7X7iodSzd9qBUHUycdyVJTW1w==}
     engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
@@ -3409,6 +3419,10 @@ packages:
     resolution: {integrity: sha512-tX5e7OM1HnYr2+a2C/4V0htOcSQcoSTH9KgJnVvNm5zm/cyEWKJ7j7YutsH9CxMdtOkkLFy2AHrMci9IM8IPZQ==}
     engines: {node: '>=12.0.0'}
 
+  tmp@0.2.3:
+    resolution: {integrity: sha512-nZD7m9iCPC5g0pYmcaxogYKggSfLsdxl8of3Q/oIbqCqLLIO9IAF0GWjX1z9NZRHPiXv8Wex4yDCaZsgEw0Y8w==}
+    engines: {node: '>=14.14'}
+
   to-regex-range@5.0.1:
     resolution: {integrity: sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==}
     engines: {node: '>=8.0'}
@@ -4825,6 +4839,8 @@ snapshots:
     dependencies:
       csstype: 3.1.3
 
+  '@types/tmp@0.2.6': {}
+
   '@typescript-eslint/eslint-plugin@8.34.0(@typescript-eslint/parser@8.34.0(eslint@9.29.0(jiti@2.4.2))(typescript@5.8.3))(eslint@9.29.0(jiti@2.4.2))(typescript@5.8.3)':
     dependencies:
       '@eslint-community/regexpp': 4.12.1
@@ -7001,6 +7017,8 @@ snapshots:
       fdir: 6.4.5(picomatch@4.0.2)
       picomatch: 4.0.2
 
+  tmp@0.2.3: {}
+
   to-regex-range@5.0.1:
     dependencies:
       is-number: 7.0.0