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# Copyright 2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import time
import json
import re
from flask import (
Flask,
send_from_directory,
request,
jsonify,
Response,
stream_with_context,
send_file,
)
from flask_cors import CORS
from evaluation import evaluate_report, evaluation_prompt
from gemini import gemini_get_text_response
from medgemma import medgemma_get_text_response
from interview_simulator import stream_interview
from cache import create_cache_zip
# Application setup
app = Flask(
__name__,
static_folder=os.environ.get("FRONTEND_BUILD", "frontend/build"),
static_url_path="/",
)
CORS(app, resources={r"/api/*": {"origins": "http://localhost:3000"}})
# -------- Routes --------
@app.route("/")
def serve_index():
"""Serve the main frontend entry-point."""
return send_from_directory(app.static_folder, "index.html")
@app.route("/api/stream_conversation", methods=["GET"])
def stream_conversation():
"""
Stream a simulated interview via Server-Sent Events (SSE).
"""
patient = request.args.get("patient", "Patient")
condition = request.args.get("condition", "unknown condition")
def event_stream():
try:
for msg in stream_interview(patient, condition):
yield f"data: {msg}\n\n"
except Exception as e:
yield f"data: Error: {e}\n\n"
raise
return Response(stream_with_context(event_stream()), mimetype="text/event-stream")
@app.route("/api/evaluate_report", methods=["POST"])
def evaluate_report_call():
"""
Evaluate a given medical report.
Expect JSON with "report" and "condition" keys.
"""
data = request.get_json() or {}
report = data.get("report", "").strip()
condition = data.get("condition", "").strip()
if not report:
return jsonify({"error": "Report is required"}), 400
if not condition:
return jsonify({"error": "Condition is required"}), 400
evaluation = evaluate_report(report, condition)
return jsonify({"evaluation": evaluation})
@app.route("/api/download_cache", methods=["GET"])
def download_cache_zip():
"""
Generate and send a zip archive of the cache directory.
"""
zip_path, error = create_cache_zip()
if error:
return jsonify({"error": error}), 500
if not os.path.isfile(zip_path):
return jsonify({"error": f"File not found: {zip_path}"}), 404
return send_file(zip_path, as_attachment=True)
@app.route("/<path:path>")
def static_proxy(path):
"""
Serve static assets; fallback to index.html for SPA routes.
"""
fs_path = os.path.join(app.static_folder, path)
if os.path.isfile(fs_path):
return send_from_directory(app.static_folder, path)
return send_from_directory(app.static_folder, "index.html")
# -------- CLI launch --------
if __name__ == "__main__":
app.run(host="0.0.0.0", port=7860, threaded=True)
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