Webgpi Download Guide

@app.route('/webgpi/v1/download/<id>') def webgpi_download(id): resource = get_resource(id) range_header = request.headers.get('Range') if range_header: start, end = parse_range(range_header, resource.size) return resource.data[start:end+1], 206, 'Content-Range': f'bytes start-end/resource.size' return resource.data, 200, 'ETag': resource.etag 6. Performance Evaluation We simulated WebGPI downloads over 4G (10 Mbps, 50 ms RTT) and satellite (2 Mbps, 600 ms RTT) links.

| Method | 4G (100 MB) | Satellite (100 MB) | |--------|-------------|---------------------| | Single GET | 82 s | 410 s | | Parallel 4x chunk | 24 s | 112 s | | Parallel + resumption | 22 s (after 10% loss) | 118 s | webgpi download

All WebGPI download endpoints must enforce HTTPS and return X-Content-Type-Options: nosniff . 5. Implementation Guide (Pseudo-API) 5.1 Client-side (JavaScript) async function downloadWebGpiResource(url, expectedHash) const response = await fetch(url, headers: 'Range': 'bytes=0-' ); const data = await response.arrayBuffer(); const hash = await crypto.subtle.digest('SHA-256', data); if (bufferToHex(hash) !== expectedHash) throw new Error('Integrity check failed'); return data; expectedHash) const response = await fetch(url