--- title: Landrun Sandbox + Browser Automation emoji: 🔒 colorFrom: purple colorTo: blue sdk: docker app_file: app.py pinned: false license: mit --- # 🔒 Landrun Sandbox + Browser Automation **Kernel-Level Code Execution Sandbox with Automated UI Testing** Execute code with maximum security using **Landrun** (Linux Landlock kernel security) and automatically test UIs with **Playwright** browser automation. ## Features ### Landrun Security - Kernel-level isolation using Linux Landlock LSM - Zero-trust execution with restricted filesystem access - Read-only system files - only /tmp/sandbox is writable - Network restrictions - only HTTP/HTTPS allowed - 10-second timeout protection ### Browser Automation - Playwright Chromium for automated UI testing - Screenshot capture before/after actions - Element interaction - click, type, wait, get text - One-shot API - execute code and test UI in single call ### Supported Languages - Python 3.11 with stdlib + compilers - JavaScript Node.js server-side execution - React JSX client-side components with live preview - HTML + CSS static pages with full styling ## API Endpoints ### POST /execute Execute code in sandbox and get preview URL ### GET /preview/{uuid} Get live HTML preview of executed code ### POST /browser/test Test existing preview with browser automation ### POST /browser/execute_and_test Execute code and test UI in single call (one-shot) ## Quick Start Python example: - Execute React code with browser automation - Click buttons and capture screenshots - Get test results with base64 screenshots ## Security - Landrun Sandbox: Kernel-level isolation using Linux Landlock - Read-only: /usr, /lib, /etc are read-only - Writable: Only /tmp/sandbox is writable - Network: TCP ports 80, 443 only - Timeout: 10 seconds max execution - Browser: Headless Chromium with 5s action timeout ## Technology Stack - Landrun: Go-based Linux Landlock sandbox - FastAPI: Modern async Python web framework - Playwright: Browser automation framework - Chromium: Headless browser engine - Docker: Multi-stage container build - Python 3.11: Runtime environment with compilers - Node.js: JavaScript execution ## Browser Actions Available actions: click, type, get_text, wait, screenshot ## License MIT License ## Links - Live Demo: https://speedofmastery-hmm.hf.space - Landrun GitHub: https://github.com/zouuup/landrun - Playwright Docs: https://playwright.dev