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Rogelio
262
apps/pyme/api/server.py
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262
apps/pyme/api/server.py
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import uuid
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import os
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from contextlib import asynccontextmanager
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from pathlib import Path
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from fastapi import FastAPI, HTTPException
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.responses import StreamingResponse, FileResponse, RedirectResponse
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from pydantic import BaseModel
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from langfuse import Langfuse
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from dotenv import load_dotenv # ← Agregar este import
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from api import services
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from api.agent import Agent
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from api.config import config
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# Cargar variables de entorno
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load_dotenv()
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# Configurar Langfuse desde variables de entorno
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langfuse = Langfuse(
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public_key=os.getenv("LANGFUSE_PUBLIC_KEY"),
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secret_key=os.getenv("LANGFUSE_SECRET_KEY"),
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host=os.getenv("LANGFUSE_HOST")
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)
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# Mapeo completo de archivos a URLs públicas
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PDF_PUBLIC_URLS = {
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}
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@asynccontextmanager
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async def lifespan(_: FastAPI):
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await config.init_mongo_db()
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yield
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app = FastAPI(lifespan=lifespan)
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"],
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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expose_headers=["*"]
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)
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agent = Agent()
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PDF_FOLDER = Path(__file__).parent / "agent" / "pdf"
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PDF_FOLDER.mkdir(parents=True, exist_ok=True)
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@app.post("/api/v1/conversation")
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async def create_conversation():
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conversation_id = uuid.uuid4()
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await services.create_conversation(conversation_id, agent.system_prompt)
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return {"conversation_id": conversation_id}
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class Message(BaseModel):
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conversation_id: uuid.UUID
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prompt: str
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@app.post("/api/v1/message")
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async def send(message: Message):
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# Tracking básico del chat
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trace = langfuse.trace(
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name="rag_chat",
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session_id=str(message.conversation_id),
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input={"prompt": message.prompt}
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)
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def b64_sse(func):
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async def wrapper(*args, **kwargs):
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response_parts = []
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async for chunk in func(*args, **kwargs):
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if chunk.type == "text" and chunk.content:
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response_parts.append(str(chunk.content))
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content = chunk.model_dump_json()
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data = f"data: {content}\n\n"
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yield data
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# Solo registrar input y output
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full_response = "".join(response_parts)
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trace.update(output={"response": full_response})
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return wrapper
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sse_stream = b64_sse(services.stream)
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generator = sse_stream(agent, message.prompt, message.conversation_id)
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return StreamingResponse(generator, media_type="text/event-stream")
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@app.get("/api/pdf/{filename}")
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async def get_pdf(filename: str):
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print(f"🔍 Solicitud PDF para: {filename}")
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if not filename.lower().endswith('.pdf'):
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print(f"❌ Archivo no es PDF: {filename}")
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raise HTTPException(status_code=400, detail="El archivo debe ser un PDF")
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if '..' in filename or ('/' in filename and not filename.startswith('http')) or '\\' in filename:
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print(f"❌ Nombre de archivo inválido: {filename}")
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raise HTTPException(status_code=400, detail="Nombre de archivo inválido")
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public_url = PDF_PUBLIC_URLS.get(filename)
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if public_url:
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print(f"✅ Redirigiendo a URL pública: {public_url}")
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return RedirectResponse(
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url=public_url,
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status_code=302,
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headers={
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"Cache-Control": "public, max-age=3600",
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"Access-Control-Allow-Origin": "*",
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"Access-Control-Allow-Methods": "GET, OPTIONS",
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"Access-Control-Allow-Headers": "*"
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}
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)
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pdf_path = PDF_FOLDER / filename
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if not pdf_path.exists():
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print(f"❌ PDF no encontrado: {pdf_path}")
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raise HTTPException(status_code=404, detail=f"PDF no encontrado. Archivo: {filename}")
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if not pdf_path.is_file():
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print(f"❌ No es un archivo: {pdf_path}")
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raise HTTPException(status_code=404, detail="El recurso no es un archivo")
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file_size = pdf_path.stat().st_size
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print(f"📄 Sirviendo archivo local: {filename} ({file_size} bytes)")
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if file_size == 0:
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print(f"❌ Archivo vacío: {pdf_path}")
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raise HTTPException(status_code=500, detail="El archivo PDF está vacío")
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return FileResponse(
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path=str(pdf_path),
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media_type="application/pdf",
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filename=filename,
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headers={
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"Content-Disposition": f"inline; filename={filename}",
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"Content-Type": "application/pdf",
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"Cache-Control": "public, max-age=3600",
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"X-Frame-Options": "ALLOWALL",
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"X-Content-Type-Options": "nosniff",
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"Access-Control-Allow-Origin": "*"
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}
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)
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@app.get("/api/pdfs")
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async def list_pdfs():
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try:
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pdf_files = []
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for filename, url in PDF_PUBLIC_URLS.items():
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pdf_files.append({
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"filename": filename,
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"size": "N/A (Público)",
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"url": f"/api/pdf/{filename}",
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"public_url": url,
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"type": "public"
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})
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local_files = []
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for pattern in ["*.pdf", "*.PDF"]:
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for file_path in PDF_FOLDER.glob(pattern):
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if file_path.is_file() and file_path.name not in PDF_PUBLIC_URLS:
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local_files.append({
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"filename": file_path.name,
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"size": file_path.stat().st_size,
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"url": f"/api/pdf/{file_path.name}",
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"type": "local"
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})
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pdf_files.extend(local_files)
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debug_info = {
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"current_working_directory": str(Path.cwd()),
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"pdf_folder_path": str(PDF_FOLDER.absolute()),
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"pdf_folder_exists": PDF_FOLDER.exists(),
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"public_urls_count": len(PDF_PUBLIC_URLS),
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"local_files_count": len(local_files),
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"public_files": list(PDF_PUBLIC_URLS.keys()),
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}
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return {
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"pdfs": pdf_files,
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"debug": debug_info,
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"total_pdfs": len(pdf_files)
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}
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except Exception as e:
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import traceback
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return {
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"error": str(e),
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"traceback": traceback.format_exc(),
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"debug": {
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"current_working_directory": str(Path.cwd()),
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"script_file_path": __file__ if '__file__' in globals() else "unknown"
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}
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}
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@app.get("/api/pdf/{filename}/info")
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async def get_pdf_info(filename: str):
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if not filename.lower().endswith('.pdf'):
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raise HTTPException(status_code=400, detail="El archivo debe ser un PDF")
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if '..' in filename or '/' in filename or '\\' in filename:
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raise HTTPException(status_code=400, detail="Nombre de archivo inválido")
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public_url = PDF_PUBLIC_URLS.get(filename)
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if public_url:
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return {
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"filename": filename,
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"size": "N/A",
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"size_mb": "N/A",
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"modified": "N/A",
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"url": f"/api/pdf/{filename}",
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"public_url": public_url,
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"type": "public"
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}
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pdf_path = PDF_FOLDER / filename
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if not pdf_path.exists():
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raise HTTPException(status_code=404, detail="PDF no encontrado")
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if not pdf_path.is_file():
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raise HTTPException(status_code=404, detail="El recurso no es un archivo")
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try:
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file_stat = pdf_path.stat()
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return {
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"filename": filename,
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"size": file_stat.st_size,
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"size_mb": round(file_stat.st_size / (1024 * 1024), 2),
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"modified": file_stat.st_mtime,
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"url": f"/api/pdf/{filename}",
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"type": "local"
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}
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"Error al obtener información del PDF: {str(e)}")
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@app.get("/api/health")
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async def health_check():
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return {
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"status": "healthy",
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"pdf_folder": str(PDF_FOLDER),
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"pdf_folder_exists": PDF_FOLDER.exists(),
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"public_urls_configured": len(PDF_PUBLIC_URLS)
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}
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