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from flask import Flask, request, jsonify, render_template_string |
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from flask_cors import CORS |
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from google import genai |
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from google.genai import types |
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import os |
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import io |
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import httpx |
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import uuid |
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from datetime import datetime, timezone, timedelta |
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from dotenv import load_dotenv |
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import json |
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load_dotenv() |
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app = Flask(__name__) |
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CORS(app) |
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client = genai.Client(api_key=os.getenv('GOOGLE_API_KEY')) |
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document_caches = {} |
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user_sessions = {} |
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HTML_TEMPLATE = """ |
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<!DOCTYPE html> |
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<html lang="en"> |
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<head> |
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<meta charset="UTF-8"> |
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<meta name="viewport" content="width=device-width, initial-scale=1.0"> |
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<title>Smart Document Analysis Platform</title> |
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<style> |
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* { |
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margin: 0; |
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padding: 0; |
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box-sizing: border-box; |
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} |
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body { |
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font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; |
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); |
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min-height: 100vh; |
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color: #333; |
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} |
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.container { |
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max-width: 1400px; |
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margin: 0 auto; |
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padding: 20px; |
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min-height: 100vh; |
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} |
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.header { |
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text-align: center; |
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margin-bottom: 30px; |
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color: white; |
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} |
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.header h1 { |
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font-size: 2.8em; |
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font-weight: 700; |
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margin-bottom: 10px; |
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text-shadow: 0 2px 4px rgba(0,0,0,0.3); |
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} |
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.header p { |
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font-size: 1.2em; |
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opacity: 0.9; |
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font-weight: 300; |
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} |
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.main-content { |
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display: grid; |
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grid-template-columns: 1fr 1fr; |
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gap: 30px; |
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height: calc(100vh - 200px); |
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} |
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.left-panel { |
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background: white; |
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border-radius: 20px; |
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padding: 30px; |
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box-shadow: 0 20px 40px rgba(0,0,0,0.1); |
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overflow-y: auto; |
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} |
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.right-panel { |
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background: white; |
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border-radius: 20px; |
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padding: 30px; |
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box-shadow: 0 20px 40px rgba(0,0,0,0.1); |
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display: flex; |
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flex-direction: column; |
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} |
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.panel-title { |
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font-size: 1.5em; |
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font-weight: 600; |
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margin-bottom: 20px; |
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color: #2d3748; |
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display: flex; |
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align-items: center; |
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gap: 10px; |
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} |
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.upload-section { |
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margin-bottom: 30px; |
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} |
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.upload-area { |
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border: 2px dashed #667eea; |
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border-radius: 15px; |
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padding: 40px; |
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text-align: center; |
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background: #f8fafc; |
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transition: all 0.3s ease; |
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margin-bottom: 20px; |
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} |
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.upload-area:hover { |
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border-color: #764ba2; |
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background: #f0f2ff; |
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transform: translateY(-2px); |
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} |
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.upload-area.dragover { |
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border-color: #764ba2; |
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background: #e8f0ff; |
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transform: scale(1.02); |
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} |
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.upload-icon { |
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font-size: 3em; |
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color: #667eea; |
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margin-bottom: 15px; |
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} |
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.file-input { |
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display: none; |
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} |
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.upload-btn { |
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); |
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color: white; |
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border: none; |
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padding: 15px 30px; |
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border-radius: 25px; |
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cursor: pointer; |
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font-size: 1.1em; |
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font-weight: 500; |
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transition: all 0.3s ease; |
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margin: 10px; |
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} |
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.upload-btn:hover { |
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transform: translateY(-2px); |
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box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3); |
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} |
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.url-input { |
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width: 100%; |
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padding: 15px; |
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border: 2px solid #e2e8f0; |
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border-radius: 10px; |
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font-size: 1em; |
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margin-bottom: 15px; |
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transition: border-color 0.3s ease; |
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} |
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.url-input:focus { |
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outline: none; |
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border-color: #667eea; |
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} |
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.btn { |
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); |
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color: white; |
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border: none; |
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padding: 12px 25px; |
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border-radius: 20px; |
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cursor: pointer; |
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font-size: 1em; |
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font-weight: 500; |
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transition: all 0.3s ease; |
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} |
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.btn:hover { |
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transform: translateY(-1px); |
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box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3); |
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} |
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.btn:disabled { |
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opacity: 0.6; |
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cursor: not-allowed; |
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transform: none; |
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} |
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.chat-container { |
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flex: 1; |
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border: 1px solid #e2e8f0; |
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border-radius: 15px; |
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overflow-y: auto; |
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padding: 20px; |
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background: #f8fafc; |
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margin-bottom: 20px; |
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} |
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.message { |
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margin-bottom: 15px; |
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padding: 15px; |
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border-radius: 12px; |
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max-width: 85%; |
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animation: fadeIn 0.3s ease; |
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} |
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@keyframes fadeIn { |
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from { opacity: 0; transform: translateY(10px); } |
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to { opacity: 1; transform: translateY(0); } |
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} |
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.user-message { |
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); |
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color: white; |
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margin-left: auto; |
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box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3); |
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} |
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.ai-message { |
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background: white; |
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color: #333; |
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border: 1px solid #e2e8f0; |
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box-shadow: 0 2px 8px rgba(0,0,0,0.1); |
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} |
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.input-group { |
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display: flex; |
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gap: 10px; |
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} |
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.question-input { |
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flex: 1; |
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padding: 15px; |
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border: 2px solid #e2e8f0; |
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border-radius: 12px; |
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font-size: 1em; |
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transition: border-color 0.3s ease; |
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} |
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.question-input:focus { |
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outline: none; |
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border-color: #667eea; |
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} |
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.cache-info { |
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background: linear-gradient(135deg, #48bb78 0%, #38a169 100%); |
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border-radius: 12px; |
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padding: 20px; |
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margin-bottom: 20px; |
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color: white; |
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box-shadow: 0 4px 12px rgba(72, 187, 120, 0.3); |
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} |
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.cache-info h3 { |
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margin-bottom: 10px; |
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font-weight: 600; |
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} |
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.loading { |
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text-align: center; |
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padding: 40px; |
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color: #666; |
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} |
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.loading-spinner { |
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border: 3px solid #f3f3f3; |
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border-top: 3px solid #667eea; |
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border-radius: 50%; |
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width: 40px; |
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height: 40px; |
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animation: spin 1s linear infinite; |
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margin: 0 auto 20px; |
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} |
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@keyframes spin { |
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0% { transform: rotate(0deg); } |
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100% { transform: rotate(360deg); } |
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} |
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.error { |
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background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%); |
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border-radius: 12px; |
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padding: 15px; |
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color: white; |
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margin-bottom: 20px; |
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box-shadow: 0 4px 12px rgba(245, 101, 101, 0.3); |
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} |
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.success { |
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background: linear-gradient(135deg, #48bb78 0%, #38a169 100%); |
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border-radius: 12px; |
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padding: 15px; |
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color: white; |
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margin-bottom: 20px; |
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box-shadow: 0 4px 12px rgba(72, 187, 120, 0.3); |
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} |
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@media (max-width: 768px) { |
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.main-content { |
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grid-template-columns: 1fr; |
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gap: 20px; |
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} |
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.header h1 { |
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font-size: 2em; |
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} |
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} |
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</style> |
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</head> |
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<body> |
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<div class="container"> |
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<div class="header"> |
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<h1>📚 Smart Document Analysis Platform</h1> |
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<p>Upload PDF documents once, ask questions forever with Gemini API caching</p> |
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</div> |
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<div class="main-content"> |
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<!-- Left Panel - Upload Section --> |
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<div class="left-panel"> |
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<div class="panel-title"> |
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📤 Upload PDF Document |
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</div> |
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<div class="upload-section"> |
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<div class="upload-area" id="uploadArea"> |
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<div class="upload-icon">📄</div> |
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<p>Drag and drop your PDF file here, or click to select</p> |
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<input type="file" id="fileInput" class="file-input" accept=".pdf"> |
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<button class="upload-btn" onclick="document.getElementById('fileInput').click()"> |
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Choose PDF File |
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</button> |
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</div> |
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<div style="margin-top: 20px;"> |
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<h3>Or provide a URL:</h3> |
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<input type="url" id="urlInput" class="url-input" placeholder="https://example.com/document.pdf"> |
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<button class="btn" onclick="uploadFromUrl()">Upload from URL</button> |
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</div> |
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</div> |
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<div id="loading" class="loading" style="display: none;"> |
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<div class="loading-spinner"></div> |
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<p id="loadingText">Processing your PDF... This may take a moment.</p> |
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</div> |
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<div id="error" class="error" style="display: none;"></div> |
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<div id="success" class="success" style="display: none;"></div> |
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</div> |
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<!-- Right Panel - Chat Section --> |
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<div class="right-panel"> |
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<div class="panel-title"> |
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💬 Ask Questions |
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</div> |
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<div id="cacheInfo" class="cache-info" style="display: none;"> |
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<h3>✅ Document Cached Successfully!</h3> |
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<p>Your PDF has been cached using Gemini API. You can now ask multiple questions without re-uploading.</p> |
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<p><strong>Cache ID:</strong> <span id="cacheId"></span></p> |
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<p><strong>Tokens Cached:</strong> <span id="tokenCount"></span></p> |
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</div> |
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<div class="chat-container" id="chatContainer"> |
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<div class="message ai-message"> |
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👋 Hello! I'm ready to analyze your PDF documents. Upload a document to get started! |
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</div> |
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</div> |
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<div class="input-group"> |
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<input type="text" id="questionInput" class="question-input" placeholder="Ask a question about your document..."> |
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<button class="btn" onclick="askQuestion()" id="askBtn">Ask</button> |
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</div> |
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</div> |
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</div> |
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</div> |
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<script> |
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let currentCacheId = null; |
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// File upload handling |
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const uploadArea = document.getElementById('uploadArea'); |
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const fileInput = document.getElementById('fileInput'); |
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uploadArea.addEventListener('dragover', (e) => { |
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e.preventDefault(); |
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uploadArea.classList.add('dragover'); |
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}); |
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uploadArea.addEventListener('dragleave', () => { |
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uploadArea.classList.remove('dragover'); |
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}); |
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uploadArea.addEventListener('drop', (e) => { |
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e.preventDefault(); |
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uploadArea.classList.remove('dragover'); |
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const files = e.dataTransfer.files; |
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if (files.length > 0) { |
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uploadFile(files[0]); |
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} |
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}); |
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fileInput.addEventListener('change', (e) => { |
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if (e.target.files.length > 0) { |
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uploadFile(e.target.files[0]); |
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} |
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}); |
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async function uploadFile(file) { |
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if (!file.type.includes('pdf')) { |
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showError('Please select a PDF file.'); |
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return; |
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} |
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showLoading('Uploading PDF...'); |
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const formData = new FormData(); |
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formData.append('file', file); |
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try { |
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const response = await fetch('/upload', { |
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method: 'POST', |
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body: formData |
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}); |
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const result = await response.json(); |
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if (result.success) { |
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currentCacheId = result.cache_id; |
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document.getElementById('cacheId').textContent = result.cache_id; |
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document.getElementById('tokenCount').textContent = result.token_count; |
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document.getElementById('cacheInfo').style.display = 'block'; |
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showSuccess('PDF uploaded and cached successfully!'); |
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// Add initial message |
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addMessage("I've analyzed your PDF document. What would you like to know about it?", 'ai'); |
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} else { |
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showError(result.error); |
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} |
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} catch (error) { |
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showError('Error uploading file: ' + error.message); |
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} finally { |
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hideLoading(); |
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} |
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} |
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async function uploadFromUrl() { |
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const url = document.getElementById('urlInput').value; |
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if (!url) { |
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showError('Please enter a valid URL.'); |
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return; |
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} |
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showLoading('Uploading PDF from URL...'); |
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try { |
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const response = await fetch('/upload-url', { |
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method: 'POST', |
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headers: { |
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'Content-Type': 'application/json' |
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}, |
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body: JSON.stringify({ url: url }) |
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}); |
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const result = await response.json(); |
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if (result.success) { |
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currentCacheId = result.cache_id; |
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document.getElementById('cacheId').textContent = result.cache_id; |
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document.getElementById('tokenCount').textContent = result.token_count; |
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document.getElementById('cacheInfo').style.display = 'block'; |
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showSuccess('PDF uploaded and cached successfully!'); |
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// Add initial message |
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addMessage("I've analyzed your PDF document. What would you like to know about it?", 'ai'); |
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} else { |
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showError(result.error); |
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} |
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} catch (error) { |
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showError('Error uploading from URL: ' + error.message); |
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} finally { |
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hideLoading(); |
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} |
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} |
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async function askQuestion() { |
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const question = document.getElementById('questionInput').value; |
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if (!question.trim()) return; |
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if (!currentCacheId) { |
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showError('Please upload a PDF document first.'); |
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return; |
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} |
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// Add user message to chat |
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addMessage(question, 'user'); |
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document.getElementById('questionInput').value = ''; |
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// Show loading state |
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const askBtn = document.getElementById('askBtn'); |
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const originalText = askBtn.textContent; |
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askBtn.textContent = 'Generating...'; |
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askBtn.disabled = true; |
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try { |
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const response = await fetch('/ask', { |
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method: 'POST', |
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headers: { |
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'Content-Type': 'application/json' |
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}, |
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body: JSON.stringify({ |
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question: question, |
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cache_id: currentCacheId |
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}) |
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}); |
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const result = await response.json(); |
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if (result.success) { |
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addMessage(result.answer, 'ai'); |
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} else { |
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addMessage('Error: ' + result.error, 'ai'); |
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} |
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} catch (error) { |
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addMessage('Error: ' + error.message, 'ai'); |
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} finally { |
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askBtn.textContent = originalText; |
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askBtn.disabled = false; |
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} |
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|
} |
|
|
|
|
|
function addMessage(text, sender) { |
|
|
const chatContainer = document.getElementById('chatContainer'); |
|
|
const messageDiv = document.createElement('div'); |
|
|
messageDiv.className = `message ${sender}-message`; |
|
|
messageDiv.textContent = text; |
|
|
chatContainer.appendChild(messageDiv); |
|
|
chatContainer.scrollTop = chatContainer.scrollHeight; |
|
|
} |
|
|
|
|
|
function showLoading(text = 'Processing...') { |
|
|
document.getElementById('loadingText').textContent = text; |
|
|
document.getElementById('loading').style.display = 'block'; |
|
|
} |
|
|
|
|
|
function hideLoading() { |
|
|
document.getElementById('loading').style.display = 'none'; |
|
|
} |
|
|
|
|
|
function showError(message) { |
|
|
const errorDiv = document.getElementById('error'); |
|
|
errorDiv.textContent = message; |
|
|
errorDiv.style.display = 'block'; |
|
|
setTimeout(() => { |
|
|
errorDiv.style.display = 'none'; |
|
|
}, 5000); |
|
|
} |
|
|
|
|
|
function showSuccess(message) { |
|
|
const successDiv = document.getElementById('success'); |
|
|
successDiv.textContent = message; |
|
|
successDiv.style.display = 'block'; |
|
|
setTimeout(() => { |
|
|
successDiv.style.display = 'none'; |
|
|
}, 5000); |
|
|
} |
|
|
|
|
|
// Enter key to ask question |
|
|
document.getElementById('questionInput').addEventListener('keypress', (e) => { |
|
|
if (e.key === 'Enter') { |
|
|
askQuestion(); |
|
|
} |
|
|
}); |
|
|
</script> |
|
|
</body> |
|
|
</html> |
|
|
""" |
|
|
|
|
|
@app.route('/') |
|
|
def index(): |
|
|
return render_template_string(HTML_TEMPLATE) |
|
|
|
|
|
@app.route('/upload', methods=['POST']) |
|
|
def upload_file(): |
|
|
try: |
|
|
if 'file' not in request.files: |
|
|
return jsonify({'success': False, 'error': 'No file provided'}) |
|
|
|
|
|
file = request.files['file'] |
|
|
|
|
|
if file.filename == '': |
|
|
return jsonify({'success': False, 'error': 'No file selected'}) |
|
|
|
|
|
|
|
|
file_content = file.read() |
|
|
file_io = io.BytesIO(file_content) |
|
|
|
|
|
|
|
|
document = client.files.upload( |
|
|
file=file_io, |
|
|
config=dict(mime_type='application/pdf') |
|
|
) |
|
|
|
|
|
|
|
|
try: |
|
|
system_instruction = "You are an expert document analyzer. Provide detailed, accurate answers based on the uploaded document content. Always be helpful and thorough in your responses." |
|
|
|
|
|
|
|
|
model = 'models/gemini-2.0-flash-001' |
|
|
|
|
|
cache = client.caches.create( |
|
|
model=model, |
|
|
config=types.CreateCachedContentConfig( |
|
|
display_name='pdf document cache', |
|
|
system_instruction=system_instruction, |
|
|
contents=[document], |
|
|
ttl="3600s", |
|
|
) |
|
|
) |
|
|
|
|
|
|
|
|
cache_id = str(uuid.uuid4()) |
|
|
document_caches[cache_id] = { |
|
|
'cache_name': cache.name, |
|
|
'document_name': file.filename, |
|
|
'created_at': datetime.now().isoformat() |
|
|
} |
|
|
|
|
|
return jsonify({ |
|
|
'success': True, |
|
|
'cache_id': cache_id, |
|
|
'token_count': getattr(cache.usage_metadata, 'cached_token_count', 'Unknown') |
|
|
}) |
|
|
|
|
|
except Exception as cache_error: |
|
|
|
|
|
if "Cached content is too small" in str(cache_error): |
|
|
return jsonify({ |
|
|
'success': False, |
|
|
'error': 'PDF is too small for caching. Please upload a larger document (minimum 4,096 tokens required).', |
|
|
'suggestion': 'Try uploading a longer document or combine multiple documents.' |
|
|
}) |
|
|
else: |
|
|
raise cache_error |
|
|
|
|
|
except Exception as e: |
|
|
return jsonify({'success': False, 'error': str(e)}) |
|
|
|
|
|
@app.route('/upload-url', methods=['POST']) |
|
|
def upload_from_url(): |
|
|
try: |
|
|
data = request.get_json() |
|
|
url = data.get('url') |
|
|
|
|
|
if not url: |
|
|
return jsonify({'success': False, 'error': 'No URL provided'}) |
|
|
|
|
|
|
|
|
response = httpx.get(url) |
|
|
response.raise_for_status() |
|
|
|
|
|
file_io = io.BytesIO(response.content) |
|
|
|
|
|
|
|
|
document = client.files.upload( |
|
|
file=file_io, |
|
|
config=dict(mime_type='application/pdf') |
|
|
) |
|
|
|
|
|
|
|
|
try: |
|
|
system_instruction = "You are an expert document analyzer. Provide detailed, accurate answers based on the uploaded document content. Always be helpful and thorough in your responses." |
|
|
|
|
|
|
|
|
model = 'models/gemini-2.0-flash-001' |
|
|
|
|
|
cache = client.caches.create( |
|
|
model=model, |
|
|
config=types.CreateCachedContentConfig( |
|
|
display_name='pdf document cache', |
|
|
system_instruction=system_instruction, |
|
|
contents=[document], |
|
|
ttl="3600s", |
|
|
) |
|
|
) |
|
|
|
|
|
|
|
|
cache_id = str(uuid.uuid4()) |
|
|
document_caches[cache_id] = { |
|
|
'cache_name': cache.name, |
|
|
'document_name': url, |
|
|
'created_at': datetime.now().isoformat() |
|
|
} |
|
|
|
|
|
return jsonify({ |
|
|
'success': True, |
|
|
'cache_id': cache_id, |
|
|
'token_count': getattr(cache.usage_metadata, 'cached_token_count', 'Unknown') |
|
|
}) |
|
|
|
|
|
except Exception as cache_error: |
|
|
|
|
|
if "Cached content is too small" in str(cache_error): |
|
|
return jsonify({ |
|
|
'success': False, |
|
|
'error': 'PDF is too small for caching. Please upload a larger document (minimum 4,096 tokens required).', |
|
|
'suggestion': 'Try uploading a longer document or combine multiple documents.' |
|
|
}) |
|
|
else: |
|
|
raise cache_error |
|
|
|
|
|
except Exception as e: |
|
|
return jsonify({'success': False, 'error': str(e)}) |
|
|
|
|
|
@app.route('/ask', methods=['POST']) |
|
|
def ask_question(): |
|
|
try: |
|
|
data = request.get_json() |
|
|
question = data.get('question') |
|
|
cache_id = data.get('cache_id') |
|
|
|
|
|
if not question or not cache_id: |
|
|
return jsonify({'success': False, 'error': 'Missing question or cache_id'}) |
|
|
|
|
|
if cache_id not in document_caches: |
|
|
return jsonify({'success': False, 'error': 'Cache not found'}) |
|
|
|
|
|
cache_info = document_caches[cache_id] |
|
|
|
|
|
|
|
|
response = client.models.generate_content( |
|
|
model='models/gemini-2.0-flash-001', |
|
|
contents=question, |
|
|
config=types.GenerateContentConfig( |
|
|
cached_content=cache_info['cache_name'] |
|
|
) |
|
|
) |
|
|
|
|
|
return jsonify({ |
|
|
'success': True, |
|
|
'answer': response.text |
|
|
}) |
|
|
|
|
|
except Exception as e: |
|
|
return jsonify({'success': False, 'error': str(e)}) |
|
|
|
|
|
@app.route('/caches', methods=['GET']) |
|
|
def list_caches(): |
|
|
try: |
|
|
caches = [] |
|
|
for cache_id, cache_info in document_caches.items(): |
|
|
caches.append({ |
|
|
'cache_id': cache_id, |
|
|
'document_name': cache_info['document_name'], |
|
|
'created_at': cache_info['created_at'] |
|
|
}) |
|
|
|
|
|
return jsonify({'success': True, 'caches': caches}) |
|
|
|
|
|
except Exception as e: |
|
|
return jsonify({'success': False, 'error': str(e)}) |
|
|
|
|
|
@app.route('/cache/<cache_id>', methods=['DELETE']) |
|
|
def delete_cache(cache_id): |
|
|
try: |
|
|
if cache_id not in document_caches: |
|
|
return jsonify({'success': False, 'error': 'Cache not found'}) |
|
|
|
|
|
cache_info = document_caches[cache_id] |
|
|
|
|
|
|
|
|
client.caches.delete(cache_info['cache_name']) |
|
|
|
|
|
|
|
|
del document_caches[cache_id] |
|
|
|
|
|
return jsonify({'success': True, 'message': 'Cache deleted successfully'}) |
|
|
|
|
|
except Exception as e: |
|
|
return jsonify({'success': False, 'error': str(e)}) |
|
|
|
|
|
if __name__ == '__main__': |
|
|
import os |
|
|
port = int(os.environ.get("PORT", 7860)) |
|
|
app.run(debug=True, host='0.0.0.0', port=port) |
