# Log (replace with proper logger) current_app.logger.info( f"User [request.remote_addr] downloading filename" )
def add_download_headers(response, filename: str): """ Attach caching, content‑disposition and security headers. """ # Force download, not inline preview (optional) response.headers["Content-Disposition"] = f'attachment; filename="filename"' gr 3108 core pdf download
const toggleUI = (busy) => btn.disabled = busy; spinner.classList.toggle('d-none', !busy); btnText.textContent = busy ? 'Downloading…' : 'Download PDF'; ; # Log (replace with proper logger) current_app
| Layer | What it does | Technologies | |-------|--------------|---------------| | | Shows a “Download PDF” button, handles click, shows progress & error messages | HTML5, CSS3 (Bootstrap 5), vanilla JavaScript (or React/Angular snippet) | | Backend API | Serves the PDF from a secure location, validates request, logs the download, supports range requests for resumable downloads | Python + Flask (or Node + Express alternative) | | Infrastructure | Stores the PDF safely, configures caching & security headers, optional CDN fallback | Filesystem/Cloud storage (e.g., S3), Nginx reverse‑proxy, optional CloudFront/Cloudflare CDN | 1️⃣ Front‑End – “Download GR‑3108‑Core PDF” Component 1.1 HTML (Bootstrap 5) <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>GR‑3108 Core – PDF Download</title> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet"> <style> .spinner-border-sm width: 1rem; height: 1rem; #downloadMsg min-height: 1.5rem; </style> </head> <body class="container py-5"> filename: str): """ Attach caching
# 3️⃣ Production (Gunicorn) gunicorn -w 4 -b 127.0.0.1:8000 run:app