Contenidos
Main.py
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import os import threading import time from flask import Flask, jsonify app = Flask(__name__) # Variable global para almacenar el estado del hilo thread_output = [] # Función que se ejecuta en un hilo separado def background_task(): global thread_output for i in range(1, 6): thread_output.append(f'Hilo en ejecución: {i}') time.sleep(1) # Pausa de 1 segundo thread_output.append('Fin del hilo') @app.route('/') def index(): return ''' <h1>Ejecutar Hilo</h1> <button onclick="startThread()">Iniciar Hilo</button> <h2>Salida del Hilo:</h2> <pre id="output"></pre> <script> function startThread() { fetch('/start-thread') .then(response => response.json()) .then(data => { if (data.started) { document.getElementById('output').innerText = 'Hilo iniciado...'; checkThreadOutput(); } }); } function checkThreadOutput() { fetch('/thread-output') .then(response => response.json()) .then(data => { document.getElementById('output').innerText = data.output.join('\\n'); if (!data.finished) { setTimeout(checkThreadOutput, 1000); } }); } </script> ''' @app.route('/start-thread') def start_thread(): # Iniciar el hilo solo si no está ya en ejecución if not any(thread.name == 'BackgroundThread' for thread in threading.enumerate()): thread = threading.Thread(target=background_task, name='BackgroundThread') thread.start() return jsonify({'started': True}) else: return jsonify({'started': False}) @app.route('/thread-output') def get_thread_output(): global thread_output finished = 'Fin del hilo' in thread_output return jsonify({'output': thread_output, 'finished': finished}) def main(): app.run(port=int(os.environ.get('PORT', 5000)), debug=True) if __name__ == "__main__": main() |
index.html
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Flask Command Execution</title> <script> function runCommand() { fetch('/') .then(response => response.text()) .then(data => { document.getElementById('output').innerText = data; }); } </script> </head> <body> <h1>Ejecutar Comando</h1> <button onclick="runCommand()">Ejecutar</button> <h2>Salida del Comando:</h2> <pre id="output"></pre> </body> </html> |
Explicación
- Hilo de fondo:
- Rutas de Flask:
- JavaScript en HTML: