copy // Cloudflare Worker — BookLens backend // Deploy: wrangler deploy export default { async fetch(request, env) { const headers = { 'Access-Control-Allow-Origin': '*', 'Content-Type': 'application/json', }; if (request.method === 'OPTIONS') return new Response(null, { headers }); if (request.method !== 'POST') return new Response('Method not allowed', { status: 405 }); try { // 1. Receive image as base64 from frontend const { imageBase64 } = await request.json(); // 2. Run Llama 3.2-Vision on Cloudflare Workers AI const aiResponse = await env.AI.run('@cf/meta/llama-3.2-11b-vision-instruct', { messages: [{ role: 'user', content: [ { type: 'text', text: 'This is a book cover. Extract the exact book title and author name. Reply in JSON: {"title":"...","author":"..."}' }, { type: 'image_url', image_url: { url: `data:image/jpeg;base64,${imageBase64}` } } ] }], max_tokens: 150, }); // 3. Parse the AI response const parsed = JSON.parse(aiResponse.response); const { title, author } = parsed; // 4. Lookup on Google Books API (free) const query = encodeURIComponent(`${title} ${author}`); const booksRes = await fetch( `https://www.googleapis.com/books/v1/volumes?q=${query}&maxResults=1&key=${env.GOOGLE_BOOKS_API_KEY}` ); const booksData = await booksRes.json(); const book = booksData.items?.[0]?.volumeInfo || {}; // 5. Return merged result return new Response(JSON.stringify({ title: book.title || title, author: (book.authors || [author]).join(', '), publisher: book.publisher, publishedDate: book.publishedDate, pageCount: book.pageCount, categories: book.categories?.[0], description: book.description, infoLink: book.infoLink, }), { headers }); } catch (err) { return new Response(JSON.stringify({ error: err.message }), { status: 500, headers }); } } };