1740 lines
59 KiB
Python
1740 lines
59 KiB
Python
from flask import (
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Flask,
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render_template,
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request,
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jsonify,
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redirect,
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url_for,
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send_from_directory,
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Response,
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stream_template,
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)
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import snap7
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import snap7.util
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import json
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import socket
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import time
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import logging
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import threading
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from datetime import datetime
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from typing import Dict, Any, Optional, List
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import struct
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import os
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import csv
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from pathlib import Path
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import atexit
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import psutil
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import sys
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from core import PLCDataStreamer
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app = Flask(__name__)
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app.secret_key = "plc_streamer_secret_key"
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def resource_path(relative_path):
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"""Get absolute path to resource, works for dev and for PyInstaller"""
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try:
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# PyInstaller creates a temp folder and stores path in _MEIPASS
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base_path = sys._MEIPASS
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except Exception:
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# Not running in a bundle
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base_path = os.path.abspath(".")
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return os.path.join(base_path, relative_path)
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# Global streamer instance (will be initialized in main)
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streamer = None
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def check_streamer_initialized():
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"""Check if streamer is initialized, return error response if not"""
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if streamer is None:
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return jsonify({"error": "Application not initialized"}), 503
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return None
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@app.route("/images/<filename>")
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def serve_image(filename):
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"""Serve images from .images directory"""
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return send_from_directory(".images", filename)
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@app.route("/static/<path:filename>")
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def serve_static(filename):
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"""Serve static files (CSS, JS, etc.)"""
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return send_from_directory("static", filename)
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@app.route("/")
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def index():
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"""Main page"""
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if streamer is None:
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return "Application not initialized", 503
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# Get variables for the current dataset or empty dict if no current dataset
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current_variables = {}
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if streamer.current_dataset_id and streamer.current_dataset_id in streamer.datasets:
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current_variables = streamer.datasets[streamer.current_dataset_id].get(
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"variables", {}
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)
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return render_template(
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"index.html",
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status=streamer.get_status(),
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variables=current_variables,
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datasets=streamer.datasets,
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current_dataset_id=streamer.current_dataset_id,
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)
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@app.route("/api/plc/config", methods=["POST"])
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def update_plc_config():
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"""Update PLC configuration"""
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error_response = check_streamer_initialized()
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if error_response:
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return error_response
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try:
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data = request.get_json()
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ip = data.get("ip", "10.1.33.11")
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rack = int(data.get("rack", 0))
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slot = int(data.get("slot", 2))
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streamer.update_plc_config(ip, rack, slot)
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return jsonify({"success": True, "message": "PLC configuration updated"})
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except Exception as e:
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return jsonify({"success": False, "message": str(e)}), 400
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@app.route("/api/udp/config", methods=["POST"])
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def update_udp_config():
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"""Update UDP configuration"""
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try:
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data = request.get_json()
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host = data.get("host", "127.0.0.1")
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port = int(data.get("port", 9870))
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streamer.update_udp_config(host, port)
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return jsonify({"success": True, "message": "UDP configuration updated"})
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except Exception as e:
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return jsonify({"success": False, "message": str(e)}), 400
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@app.route("/api/csv/config", methods=["GET"])
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def get_csv_config():
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"""Get CSV recording configuration"""
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error_response = check_streamer_initialized()
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if error_response:
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return error_response
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try:
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csv_config = streamer.config_manager.csv_config.copy()
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# Add current directory information
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current_dir = streamer.config_manager.get_csv_directory_path()
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csv_config["current_directory"] = os.path.abspath(current_dir)
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csv_config["directory_exists"] = os.path.exists(current_dir)
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# Add disk space info
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disk_info = streamer.get_disk_space_info()
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if disk_info:
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csv_config["disk_space"] = disk_info
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return jsonify({"success": True, "config": csv_config})
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except Exception as e:
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return jsonify({"success": False, "message": str(e)}), 500
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@app.route("/api/csv/config", methods=["POST"])
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def update_csv_config():
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"""Update CSV recording configuration"""
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error_response = check_streamer_initialized()
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if error_response:
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return error_response
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try:
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data = request.get_json()
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# Extract valid configuration parameters
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config_updates = {}
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valid_params = {
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"records_directory",
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"rotation_enabled",
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"max_size_mb",
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"max_days",
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"max_hours",
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"cleanup_interval_hours",
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}
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for param in valid_params:
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if param in data:
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config_updates[param] = data[param]
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if not config_updates:
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return (
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jsonify(
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{
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"success": False,
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"message": "No valid configuration parameters provided",
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}
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),
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400,
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)
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# Update configuration
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result = streamer.config_manager.update_csv_config(**config_updates)
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return jsonify(
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{
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"success": True,
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"message": "CSV configuration updated successfully",
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"old_config": result["old_config"],
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"new_config": result["new_config"],
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}
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)
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except ValueError as e:
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return jsonify({"success": False, "message": str(e)}), 400
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except Exception as e:
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return jsonify({"success": False, "message": str(e)}), 500
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@app.route("/api/csv/cleanup", methods=["POST"])
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def trigger_csv_cleanup():
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"""Manually trigger CSV cleanup"""
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error_response = check_streamer_initialized()
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if error_response:
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return error_response
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try:
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# Perform cleanup
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streamer.streamer.perform_csv_cleanup()
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return jsonify(
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{"success": True, "message": "CSV cleanup completed successfully"}
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)
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except Exception as e:
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return jsonify({"success": False, "message": str(e)}), 500
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@app.route("/api/csv/directory/info", methods=["GET"])
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def get_csv_directory_info():
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"""Get information about CSV directory and files"""
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error_response = check_streamer_initialized()
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if error_response:
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return error_response
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try:
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base_dir = streamer.config_manager.get_csv_directory_path()
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info = {
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"base_directory": os.path.abspath(base_dir),
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"directory_exists": os.path.exists(base_dir),
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"total_files": 0,
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"total_size_mb": 0,
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"oldest_file": None,
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"newest_file": None,
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"day_folders": [],
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}
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if os.path.exists(base_dir):
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total_size = 0
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oldest_time = None
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newest_time = None
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for day_folder in os.listdir(base_dir):
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day_path = os.path.join(base_dir, day_folder)
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if os.path.isdir(day_path):
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day_info = {"name": day_folder, "files": 0, "size_mb": 0}
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for file_name in os.listdir(day_path):
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if file_name.endswith(".csv"):
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file_path = os.path.join(day_path, file_name)
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if os.path.isfile(file_path):
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stat = os.stat(file_path)
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file_size = stat.st_size
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file_time = stat.st_mtime
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info["total_files"] += 1
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day_info["files"] += 1
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total_size += file_size
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day_info["size_mb"] += file_size / (1024 * 1024)
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if oldest_time is None or file_time < oldest_time:
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oldest_time = file_time
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info["oldest_file"] = datetime.fromtimestamp(
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file_time
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).isoformat()
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if newest_time is None or file_time > newest_time:
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newest_time = file_time
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info["newest_file"] = datetime.fromtimestamp(
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file_time
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).isoformat()
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day_info["size_mb"] = round(day_info["size_mb"], 2)
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info["day_folders"].append(day_info)
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info["total_size_mb"] = round(total_size / (1024 * 1024), 2)
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info["day_folders"].sort(key=lambda x: x["name"], reverse=True)
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return jsonify({"success": True, "info": info})
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except Exception as e:
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return jsonify({"success": False, "message": str(e)}), 500
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@app.route("/api/plc/connect", methods=["POST"])
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def connect_plc():
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"""Connect to PLC"""
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error_response = check_streamer_initialized()
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if error_response:
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return error_response
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if streamer.connect_plc():
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return jsonify({"success": True, "message": "Connected to PLC"})
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else:
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return jsonify({"success": False, "message": "Error connecting to PLC"}), 500
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|
|
|
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@app.route("/api/plc/disconnect", methods=["POST"])
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def disconnect_plc():
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"""Disconnect from PLC"""
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streamer.disconnect_plc()
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return jsonify({"success": True, "message": "Disconnected from PLC"})
|
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|
|
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@app.route("/api/variables", methods=["POST"])
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def add_variable():
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"""Add a new variable"""
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|
try:
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|
data = request.get_json()
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name = data.get("name")
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area = data.get("area")
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db = int(data.get("db"))
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offset = int(data.get("offset"))
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var_type = data.get("type")
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bit = data.get("bit") # Added bit parameter
|
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|
|
valid_types = [
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"real",
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|
"int",
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"bool",
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"dint",
|
|
"word",
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|
"byte",
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|
"uint",
|
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"udint",
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"sint",
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"usint",
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]
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valid_areas = ["db", "mw", "m", "pew", "pe", "paw", "pa", "e", "a", "mb"]
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|
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if (
|
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not name
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or not area
|
|
or var_type not in valid_types
|
|
or area.lower() not in valid_areas
|
|
):
|
|
return jsonify({"success": False, "message": "Invalid data"}), 400
|
|
|
|
if area.lower() in ["e", "a", "mb"] and bit is None:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "Bit position must be specified for bit areas",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
if area.lower() in ["e", "a", "mb"] and (bit < 0 or bit > 7):
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "Bit position must be between 0 and 7",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
streamer.add_variable(name, area, db, offset, var_type, bit)
|
|
return jsonify({"success": True, "message": f"Variable {name} added"})
|
|
|
|
except Exception as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
|
|
|
|
@app.route("/api/variables/<name>", methods=["DELETE"])
|
|
def remove_variable(name):
|
|
"""Remove a variable"""
|
|
streamer.remove_variable(name)
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|
return jsonify({"success": True, "message": f"Variable {name} removed"})
|
|
|
|
|
|
@app.route("/api/variables/<name>", methods=["GET"])
|
|
def get_variable(name):
|
|
"""Get a specific variable configuration from current dataset"""
|
|
try:
|
|
if not streamer.current_dataset_id:
|
|
return (
|
|
jsonify({"success": False, "message": "No dataset selected"}),
|
|
400,
|
|
)
|
|
|
|
current_variables = streamer.get_dataset_variables(streamer.current_dataset_id)
|
|
if name not in current_variables:
|
|
return (
|
|
jsonify({"success": False, "message": f"Variable {name} not found"}),
|
|
404,
|
|
)
|
|
|
|
var_config = current_variables[name].copy()
|
|
var_config["name"] = name
|
|
|
|
# Check if variable is in streaming list for current dataset
|
|
streaming_vars = streamer.datasets[streamer.current_dataset_id].get(
|
|
"streaming_variables", []
|
|
)
|
|
var_config["streaming"] = name in streaming_vars
|
|
|
|
return jsonify({"success": True, "variable": var_config})
|
|
|
|
except Exception as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
|
|
|
|
@app.route("/api/variables/<name>", methods=["PUT"])
|
|
def update_variable(name):
|
|
"""Update an existing variable in current dataset"""
|
|
try:
|
|
if not streamer.current_dataset_id:
|
|
return jsonify({"success": False, "message": "No dataset selected"}), 400
|
|
|
|
data = request.get_json()
|
|
new_name = data.get("name", name)
|
|
area = data.get("area")
|
|
db = int(data.get("db", 1))
|
|
offset = int(data.get("offset"))
|
|
var_type = data.get("type")
|
|
bit = data.get("bit")
|
|
|
|
valid_types = [
|
|
"real",
|
|
"int",
|
|
"bool",
|
|
"dint",
|
|
"word",
|
|
"byte",
|
|
"uint",
|
|
"udint",
|
|
"sint",
|
|
"usint",
|
|
]
|
|
valid_areas = ["db", "mw", "m", "pew", "pe", "paw", "pa", "e", "a", "mb"]
|
|
|
|
if (
|
|
not new_name
|
|
or not area
|
|
or var_type not in valid_types
|
|
or area.lower() not in valid_areas
|
|
):
|
|
return jsonify({"success": False, "message": "Invalid data"}), 400
|
|
|
|
if area.lower() in ["e", "a", "mb"] and bit is None:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "Bit position must be specified for bit areas",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
if area.lower() in ["e", "a", "mb"] and (bit < 0 or bit > 7):
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "Bit position must be between 0 and 7",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
current_dataset_id = streamer.current_dataset_id
|
|
current_variables = streamer.get_dataset_variables(current_dataset_id)
|
|
|
|
# Check if variable exists in current dataset
|
|
if name not in current_variables:
|
|
return (
|
|
jsonify({"success": False, "message": f"Variable {name} not found"}),
|
|
404,
|
|
)
|
|
|
|
# Check if new name already exists (if name is changing)
|
|
if name != new_name and new_name in current_variables:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": f"Variable {new_name} already exists",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
# Preserve streaming state
|
|
streaming_vars = streamer.datasets[current_dataset_id].get(
|
|
"streaming_variables", []
|
|
)
|
|
was_streaming = name in streaming_vars
|
|
|
|
# Remove old variable
|
|
streamer.remove_variable_from_dataset(current_dataset_id, name)
|
|
|
|
# Add updated variable
|
|
streamer.add_variable_to_dataset(
|
|
current_dataset_id, new_name, area, db, offset, var_type, bit, was_streaming
|
|
)
|
|
|
|
return jsonify({"success": True, "message": f"Variable updated successfully"})
|
|
|
|
except Exception as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
|
|
|
|
@app.route("/api/variables/<name>/streaming", methods=["POST"])
|
|
def toggle_variable_streaming(name):
|
|
"""Toggle streaming for a specific variable in current dataset"""
|
|
try:
|
|
if not streamer.current_dataset_id:
|
|
return jsonify({"success": False, "message": "No dataset selected"}), 400
|
|
|
|
data = request.get_json()
|
|
enabled = data.get("enabled", False)
|
|
|
|
# Use the new dataset-specific method
|
|
streamer.toggle_variable_streaming(streamer.current_dataset_id, name, enabled)
|
|
|
|
status = "enabled" if enabled else "disabled"
|
|
return jsonify(
|
|
{"success": True, "message": f"Variable {name} streaming {status}"}
|
|
)
|
|
|
|
except Exception as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
|
|
|
|
@app.route("/api/variables/streaming", methods=["GET"])
|
|
def get_streaming_variables():
|
|
"""Get list of variables enabled for streaming in current dataset"""
|
|
if streamer is None:
|
|
return jsonify({"success": False, "error": "Streamer not initialized"}), 503
|
|
|
|
# Get streaming variables from current dataset
|
|
streaming_vars = []
|
|
if streamer.current_dataset_id and streamer.current_dataset_id in streamer.datasets:
|
|
streaming_vars = streamer.datasets[streamer.current_dataset_id].get(
|
|
"streaming_variables", []
|
|
)
|
|
|
|
return jsonify({"success": True, "streaming_variables": streaming_vars})
|
|
|
|
|
|
@app.route("/api/datasets/<dataset_id>/variables/values", methods=["GET"])
|
|
def get_dataset_variable_values(dataset_id):
|
|
"""Get current values of all variables in a dataset - CACHE ONLY"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
# Check if dataset exists
|
|
if dataset_id not in streamer.datasets:
|
|
return (
|
|
jsonify(
|
|
{"success": False, "message": f"Dataset '{dataset_id}' not found"}
|
|
),
|
|
404,
|
|
)
|
|
|
|
# Get dataset variables
|
|
dataset_variables = streamer.get_dataset_variables(dataset_id)
|
|
|
|
if not dataset_variables:
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"message": "No variables defined in this dataset",
|
|
"values": {},
|
|
"source": "no_variables",
|
|
}
|
|
)
|
|
|
|
# Check if dataset is active (required for cache to be populated)
|
|
if dataset_id not in streamer.active_datasets:
|
|
return jsonify(
|
|
{
|
|
"success": False,
|
|
"message": f"Dataset '{dataset_id}' is not active. Activate the dataset to start reading variables and populate cache.",
|
|
"error_type": "dataset_inactive",
|
|
"values": {},
|
|
"detailed_errors": {},
|
|
"stats": {
|
|
"success": 0,
|
|
"failed": 0,
|
|
"total": len(dataset_variables),
|
|
},
|
|
"timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
|
|
"source": "no_cache_dataset_inactive",
|
|
"is_cached": False,
|
|
}
|
|
)
|
|
|
|
# Check if PLC is connected (required for streaming to populate cache)
|
|
if not streamer.plc_client.is_connected():
|
|
return jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "PLC not connected. Connect to PLC and activate dataset to populate cache.",
|
|
"error_type": "plc_disconnected",
|
|
"values": {},
|
|
"detailed_errors": {},
|
|
"stats": {
|
|
"success": 0,
|
|
"failed": 0,
|
|
"total": len(dataset_variables),
|
|
},
|
|
"timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
|
|
"source": "no_cache_plc_disconnected",
|
|
"is_cached": False,
|
|
}
|
|
)
|
|
|
|
# Get cached values - this is the ONLY source of data according to application principles
|
|
if not streamer.has_cached_values(dataset_id):
|
|
return jsonify(
|
|
{
|
|
"success": False,
|
|
"message": f"No cached values available for dataset '{dataset_id}'. Cache is populated by the streaming process at the dataset's configured interval. Please wait for the next reading cycle.",
|
|
"error_type": "no_cache_available",
|
|
"values": {},
|
|
"detailed_errors": {},
|
|
"stats": {
|
|
"success": 0,
|
|
"failed": 0,
|
|
"total": len(dataset_variables),
|
|
},
|
|
"timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
|
|
"source": "no_cache_available",
|
|
"is_cached": False,
|
|
"note": f"Dataset reads every {streamer.config_manager.get_dataset_sampling_interval(dataset_id)}s",
|
|
}
|
|
)
|
|
|
|
# Get cached values (the ONLY valid source according to application design)
|
|
read_result = streamer.get_cached_dataset_values(dataset_id)
|
|
|
|
# Convert timestamp from ISO format to readable format for consistency
|
|
if read_result.get("timestamp"):
|
|
try:
|
|
cached_timestamp = datetime.fromisoformat(read_result["timestamp"])
|
|
read_result["timestamp"] = cached_timestamp.strftime(
|
|
"%Y-%m-%d %H:%M:%S"
|
|
)
|
|
except:
|
|
pass # Keep original timestamp if conversion fails
|
|
|
|
# Extract values and handle diagnostics
|
|
if not read_result.get("success", False):
|
|
# Complete failure case
|
|
error_msg = read_result.get("error", "Unknown error reading variables")
|
|
error_type = read_result.get("error_type", "unknown")
|
|
|
|
# Log detailed error information
|
|
if streamer.logger:
|
|
streamer.logger.error(
|
|
f"Cached values indicate failure for dataset '{dataset_id}': {error_msg}"
|
|
)
|
|
if read_result.get("errors"):
|
|
for var_name, var_error in read_result["errors"].items():
|
|
streamer.logger.error(f" Variable '{var_name}': {var_error}")
|
|
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": error_msg,
|
|
"error_type": error_type,
|
|
"values": {},
|
|
"detailed_errors": read_result.get("errors", {}),
|
|
"stats": read_result.get("stats", {}),
|
|
"timestamp": read_result.get(
|
|
"timestamp", datetime.now().strftime("%Y-%m-%d %H:%M:%S")
|
|
),
|
|
"source": "cache",
|
|
"is_cached": True,
|
|
}
|
|
),
|
|
500,
|
|
)
|
|
|
|
# Success or partial success case
|
|
raw_values = read_result.get("values", {})
|
|
variable_errors = read_result.get("errors", {})
|
|
stats = read_result.get("stats", {})
|
|
|
|
# Format values for display
|
|
formatted_values = {}
|
|
error_details = {}
|
|
|
|
for var_name, value in raw_values.items():
|
|
if value is not None:
|
|
var_config = dataset_variables[var_name]
|
|
var_type = var_config.get("type", "unknown")
|
|
|
|
# Format value based on type
|
|
try:
|
|
if var_type == "real":
|
|
formatted_values[var_name] = (
|
|
f"{value:.3f}"
|
|
if isinstance(value, (int, float))
|
|
else str(value)
|
|
)
|
|
elif var_type == "bool":
|
|
formatted_values[var_name] = "TRUE" if value else "FALSE"
|
|
elif var_type in [
|
|
"int",
|
|
"uint",
|
|
"dint",
|
|
"udint",
|
|
"word",
|
|
"byte",
|
|
"sint",
|
|
"usint",
|
|
]:
|
|
formatted_values[var_name] = (
|
|
str(int(value))
|
|
if isinstance(value, (int, float))
|
|
else str(value)
|
|
)
|
|
else:
|
|
formatted_values[var_name] = str(value)
|
|
except Exception as format_error:
|
|
formatted_values[var_name] = "FORMAT_ERROR"
|
|
error_details[var_name] = f"Format error: {str(format_error)}"
|
|
else:
|
|
# Variable had an error - get the specific error message
|
|
specific_error = variable_errors.get(var_name, "Unknown error")
|
|
formatted_values[var_name] = "ERROR"
|
|
error_details[var_name] = specific_error
|
|
|
|
# Prepare response message
|
|
total_vars = stats.get("total", len(dataset_variables))
|
|
success_vars = stats.get("success", 0)
|
|
failed_vars = stats.get("failed", 0)
|
|
|
|
# Determine data source for message (always cache now)
|
|
data_source = "cache"
|
|
source_text = " (from streaming cache)"
|
|
|
|
if failed_vars == 0:
|
|
message = (
|
|
f"Successfully displaying all {success_vars} variables{source_text}"
|
|
)
|
|
response_success = True
|
|
else:
|
|
message = f"Partial data available: {success_vars}/{total_vars} variables have valid cached values, {failed_vars} failed{source_text}"
|
|
response_success = True # Still success if we got some values
|
|
|
|
# Log warnings for partial failures
|
|
if streamer.logger:
|
|
streamer.logger.warning(
|
|
f"Partial failure in cached values for dataset '{dataset_id}': {message}"
|
|
)
|
|
for var_name, var_error in error_details.items():
|
|
if formatted_values.get(var_name) == "ERROR":
|
|
streamer.logger.warning(f" Variable '{var_name}': {var_error}")
|
|
|
|
return jsonify(
|
|
{
|
|
"success": response_success,
|
|
"message": message,
|
|
"values": formatted_values,
|
|
"detailed_errors": error_details,
|
|
"stats": stats,
|
|
"timestamp": read_result.get(
|
|
"timestamp", datetime.now().strftime("%Y-%m-%d %H:%M:%S")
|
|
),
|
|
"warning": read_result.get("warning"),
|
|
"source": data_source,
|
|
"is_cached": True,
|
|
"cache_info": f"Dataset reads every {streamer.config_manager.get_dataset_sampling_interval(dataset_id)}s",
|
|
}
|
|
)
|
|
|
|
except Exception as e:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": f"Error retrieving cached variable values: {str(e)}",
|
|
"values": {},
|
|
}
|
|
),
|
|
500,
|
|
)
|
|
|
|
|
|
# Dataset Management API Endpoints
|
|
|
|
|
|
@app.route("/api/datasets", methods=["GET"])
|
|
def get_datasets():
|
|
"""Get all datasets"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"datasets": streamer.datasets,
|
|
"active_datasets": list(streamer.active_datasets),
|
|
"current_dataset_id": streamer.current_dataset_id,
|
|
}
|
|
)
|
|
|
|
|
|
@app.route("/api/datasets", methods=["POST"])
|
|
def create_dataset():
|
|
"""Create a new dataset"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
data = request.get_json()
|
|
dataset_id = data.get("dataset_id", "").strip()
|
|
name = data.get("name", "").strip()
|
|
prefix = data.get("prefix", "").strip()
|
|
sampling_interval = data.get("sampling_interval")
|
|
|
|
if not dataset_id or not name or not prefix:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "Dataset ID, name, and prefix are required",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
# Validate sampling interval if provided
|
|
if sampling_interval is not None:
|
|
sampling_interval = float(sampling_interval)
|
|
if sampling_interval < 0.01:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "Sampling interval must be at least 0.01 seconds",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
streamer.create_dataset(dataset_id, name, prefix, sampling_interval)
|
|
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"message": f"Dataset '{name}' created successfully",
|
|
"dataset_id": dataset_id,
|
|
}
|
|
)
|
|
|
|
except ValueError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
except Exception as e:
|
|
return (
|
|
jsonify({"success": False, "message": f"Error creating dataset: {str(e)}"}),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/datasets/<dataset_id>", methods=["DELETE"])
|
|
def delete_dataset(dataset_id):
|
|
"""Delete a dataset"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
streamer.delete_dataset(dataset_id)
|
|
return jsonify({"success": True, "message": "Dataset deleted successfully"})
|
|
except ValueError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 404
|
|
except Exception as e:
|
|
return (
|
|
jsonify({"success": False, "message": f"Error deleting dataset: {str(e)}"}),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/datasets/<dataset_id>/activate", methods=["POST"])
|
|
def activate_dataset(dataset_id):
|
|
"""Activate a dataset for streaming"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
streamer.activate_dataset(dataset_id)
|
|
return jsonify({"success": True, "message": "Dataset activated successfully"})
|
|
except ValueError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 404
|
|
except RuntimeError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
except Exception as e:
|
|
return (
|
|
jsonify(
|
|
{"success": False, "message": f"Error activating dataset: {str(e)}"}
|
|
),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/datasets/<dataset_id>/deactivate", methods=["POST"])
|
|
def deactivate_dataset(dataset_id):
|
|
"""Deactivate a dataset"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
streamer.deactivate_dataset(dataset_id)
|
|
return jsonify({"success": True, "message": "Dataset deactivated successfully"})
|
|
except ValueError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 404
|
|
except Exception as e:
|
|
return (
|
|
jsonify(
|
|
{"success": False, "message": f"Error deactivating dataset: {str(e)}"}
|
|
),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/datasets/<dataset_id>/variables", methods=["POST"])
|
|
def add_variable_to_dataset(dataset_id):
|
|
"""Add a variable to a dataset"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
data = request.get_json()
|
|
name = data.get("name", "").strip()
|
|
area = data.get("area", "").strip()
|
|
db = data.get("db", 1)
|
|
offset = data.get("offset", 0)
|
|
var_type = data.get("type", "").strip()
|
|
bit = data.get("bit")
|
|
streaming = data.get("streaming", False)
|
|
|
|
if not name or not area or not var_type:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": "Variable name, area, and type are required",
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
streamer.add_variable_to_dataset(
|
|
dataset_id, name, area, db, offset, var_type, bit, streaming
|
|
)
|
|
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"message": f"Variable '{name}' added to dataset successfully",
|
|
}
|
|
)
|
|
|
|
except ValueError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
except Exception as e:
|
|
return (
|
|
jsonify({"success": False, "message": f"Error adding variable: {str(e)}"}),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/datasets/<dataset_id>/variables/<variable_name>", methods=["DELETE"])
|
|
def remove_variable_from_dataset(dataset_id, variable_name):
|
|
"""Remove a variable from a dataset"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
streamer.remove_variable_from_dataset(dataset_id, variable_name)
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"message": f"Variable '{variable_name}' removed from dataset successfully",
|
|
}
|
|
)
|
|
except ValueError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 404
|
|
except Exception as e:
|
|
return (
|
|
jsonify(
|
|
{"success": False, "message": f"Error removing variable: {str(e)}"}
|
|
),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route(
|
|
"/api/datasets/<dataset_id>/variables/<variable_name>/streaming", methods=["POST"]
|
|
)
|
|
def toggle_variable_streaming_in_dataset(dataset_id, variable_name):
|
|
"""Toggle streaming for a variable in a dataset"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
data = request.get_json()
|
|
enabled = data.get("enabled", False)
|
|
|
|
streamer.toggle_variable_streaming(dataset_id, variable_name, enabled)
|
|
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"message": f"Variable '{variable_name}' streaming {'enabled' if enabled else 'disabled'}",
|
|
}
|
|
)
|
|
except ValueError as e:
|
|
return jsonify({"success": False, "message": str(e)}), 404
|
|
except Exception as e:
|
|
return (
|
|
jsonify(
|
|
{"success": False, "message": f"Error toggling streaming: {str(e)}"}
|
|
),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/datasets/current", methods=["POST"])
|
|
def set_current_dataset():
|
|
"""Set the current dataset for editing"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
data = request.get_json()
|
|
dataset_id = data.get("dataset_id")
|
|
|
|
if dataset_id and dataset_id in streamer.datasets:
|
|
streamer.current_dataset_id = dataset_id
|
|
streamer.save_datasets()
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"message": "Current dataset updated successfully",
|
|
"current_dataset_id": dataset_id,
|
|
}
|
|
)
|
|
else:
|
|
return jsonify({"success": False, "message": "Invalid dataset ID"}), 400
|
|
|
|
except Exception as e:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"success": False,
|
|
"message": f"Error setting current dataset: {str(e)}",
|
|
}
|
|
),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/streaming/start", methods=["POST"])
|
|
def start_streaming():
|
|
"""Start UDP streaming (legacy endpoint - now only starts UDP streaming)"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
if streamer.start_streaming():
|
|
return jsonify({"success": True, "message": "UDP streaming started"})
|
|
else:
|
|
return (
|
|
jsonify({"success": False, "message": "Error starting UDP streaming"}),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/streaming/stop", methods=["POST"])
|
|
def stop_streaming():
|
|
"""Stop UDP streaming (legacy endpoint - now only stops UDP streaming)"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
streamer.stop_streaming()
|
|
return jsonify({"success": True, "message": "UDP streaming stopped"})
|
|
|
|
|
|
@app.route("/api/sampling", methods=["POST"])
|
|
def update_sampling():
|
|
"""Update sampling interval"""
|
|
try:
|
|
data = request.get_json()
|
|
interval = float(data.get("interval", 0.1))
|
|
|
|
if interval < 0.01:
|
|
interval = 0.01
|
|
|
|
streamer.update_sampling_interval(interval)
|
|
return jsonify({"success": True, "message": f"Interval updated to {interval}s"})
|
|
|
|
except Exception as e:
|
|
return jsonify({"success": False, "message": str(e)}), 400
|
|
|
|
|
|
@app.route("/api/csv/start", methods=["POST"])
|
|
def start_csv_recording_legacy():
|
|
"""Start CSV recording independently (legacy endpoint)"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
if streamer.data_streamer.start_csv_recording():
|
|
return jsonify({"success": True, "message": "CSV recording started"})
|
|
else:
|
|
return (
|
|
jsonify({"success": False, "message": "Error starting CSV recording"}),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/csv/stop", methods=["POST"])
|
|
def stop_csv_recording_legacy():
|
|
"""Stop CSV recording independently (legacy endpoint)"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
streamer.data_streamer.stop_csv_recording()
|
|
return jsonify({"success": True, "message": "CSV recording stopped"})
|
|
|
|
|
|
@app.route("/api/csv/recording/start", methods=["POST"])
|
|
def start_csv_recording():
|
|
"""Start CSV recording independently of UDP streaming"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
if streamer.data_streamer.start_csv_recording():
|
|
return jsonify({"success": True, "message": "CSV recording started"})
|
|
else:
|
|
return (
|
|
jsonify({"success": False, "message": "Error starting CSV recording"}),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/csv/recording/stop", methods=["POST"])
|
|
def stop_csv_recording():
|
|
"""Stop CSV recording independently of UDP streaming"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
streamer.data_streamer.stop_csv_recording()
|
|
return jsonify({"success": True, "message": "CSV recording stopped"})
|
|
|
|
|
|
# 🔑 NEW: UDP Streaming Control (Independent)
|
|
@app.route("/api/udp/streaming/start", methods=["POST"])
|
|
def start_udp_streaming():
|
|
"""Start UDP streaming to PlotJuggler independently of CSV recording"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
if streamer.data_streamer.start_udp_streaming():
|
|
return jsonify(
|
|
{"success": True, "message": "UDP streaming to PlotJuggler started"}
|
|
)
|
|
else:
|
|
return (
|
|
jsonify({"success": False, "message": "Error starting UDP streaming"}),
|
|
500,
|
|
)
|
|
|
|
|
|
@app.route("/api/udp/streaming/stop", methods=["POST"])
|
|
def stop_udp_streaming():
|
|
"""Stop UDP streaming to PlotJuggler independently of CSV recording"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
streamer.data_streamer.stop_udp_streaming()
|
|
return jsonify({"success": True, "message": "UDP streaming to PlotJuggler stopped"})
|
|
|
|
|
|
# 📈 PLOT MANAGER API ENDPOINTS
|
|
@app.route("/api/plots", methods=["GET"])
|
|
def get_plots():
|
|
"""Get all plot sessions status"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
sessions = streamer.data_streamer.plot_manager.get_all_sessions_status()
|
|
return jsonify({"sessions": sessions})
|
|
except Exception as e:
|
|
return jsonify({"error": str(e)}), 500
|
|
|
|
|
|
@app.route("/api/plots", methods=["POST"])
|
|
def create_plot():
|
|
"""Create a new plot session"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
data = request.get_json()
|
|
|
|
# Validar datos requeridos
|
|
if not data.get("variables"):
|
|
return jsonify({"error": "At least one variable is required"}), 400
|
|
|
|
if not data.get("time_window"):
|
|
return jsonify({"error": "Time window is required"}), 400
|
|
|
|
# Validar que las variables existen en datasets activos
|
|
available_vars = streamer.data_streamer.plot_manager.get_available_variables(
|
|
streamer.data_streamer.get_active_datasets(),
|
|
streamer.config_manager.datasets,
|
|
)
|
|
|
|
invalid_vars = [var for var in data["variables"] if var not in available_vars]
|
|
if invalid_vars:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"error": f"Variables not available: {', '.join(invalid_vars)}",
|
|
"available_variables": available_vars,
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
# Validar trigger si está habilitado
|
|
if data.get("trigger_enabled") and data.get("trigger_variable"):
|
|
boolean_vars = streamer.data_streamer.plot_manager.get_boolean_variables(
|
|
streamer.data_streamer.get_active_datasets(),
|
|
streamer.config_manager.datasets,
|
|
)
|
|
|
|
if data["trigger_variable"] not in boolean_vars:
|
|
return (
|
|
jsonify(
|
|
{
|
|
"error": f"Trigger variable '{data['trigger_variable']}' is not a boolean variable",
|
|
"boolean_variables": boolean_vars,
|
|
}
|
|
),
|
|
400,
|
|
)
|
|
|
|
# Crear configuración de la sesión
|
|
config = {
|
|
"name": data.get(
|
|
"name", f"Plot {len(streamer.data_streamer.plot_manager.sessions) + 1}"
|
|
),
|
|
"variables": data["variables"],
|
|
"time_window": int(data["time_window"]),
|
|
"y_min": data.get("y_min"),
|
|
"y_max": data.get("y_max"),
|
|
"trigger_variable": data.get("trigger_variable"),
|
|
"trigger_enabled": data.get("trigger_enabled", False),
|
|
"trigger_on_true": data.get("trigger_on_true", True),
|
|
}
|
|
|
|
# Convertir valores numéricos si están presentes
|
|
if config["y_min"] is not None:
|
|
config["y_min"] = float(config["y_min"])
|
|
if config["y_max"] is not None:
|
|
config["y_max"] = float(config["y_max"])
|
|
|
|
session_id = streamer.data_streamer.plot_manager.create_session(config)
|
|
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"session_id": session_id,
|
|
"message": f"Plot session '{config['name']}' created successfully",
|
|
}
|
|
)
|
|
|
|
except Exception as e:
|
|
return jsonify({"error": str(e)}), 500
|
|
|
|
|
|
@app.route("/api/plots/<session_id>", methods=["DELETE"])
|
|
def remove_plot(session_id):
|
|
"""Remove a plot session"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
success = streamer.data_streamer.plot_manager.remove_session(session_id)
|
|
if success:
|
|
return jsonify({"success": True, "message": "Plot session removed"})
|
|
else:
|
|
return jsonify({"error": "Plot session not found"}), 404
|
|
except Exception as e:
|
|
return jsonify({"error": str(e)}), 500
|
|
|
|
|
|
@app.route("/api/plots/<session_id>/control", methods=["POST"])
|
|
def control_plot(session_id):
|
|
"""Control a plot session (start/stop/pause/resume/clear)"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
data = request.get_json()
|
|
action = data.get("action")
|
|
|
|
if action not in ["start", "stop", "pause", "resume", "clear"]:
|
|
return (
|
|
jsonify(
|
|
{"error": "Invalid action. Use: start, stop, pause, resume, clear"}
|
|
),
|
|
400,
|
|
)
|
|
|
|
success = streamer.data_streamer.plot_manager.control_session(
|
|
session_id, action
|
|
)
|
|
if success:
|
|
return jsonify({"success": True, "message": f"Plot session {action}ed"})
|
|
else:
|
|
return jsonify({"error": "Plot session not found"}), 404
|
|
except Exception as e:
|
|
return jsonify({"error": str(e)}), 500
|
|
|
|
|
|
@app.route("/api/plots/<session_id>/data", methods=["GET"])
|
|
def get_plot_data(session_id):
|
|
"""Get plot data for a specific session"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
plot_data = streamer.data_streamer.plot_manager.get_session_data(session_id)
|
|
if plot_data:
|
|
return jsonify(plot_data)
|
|
else:
|
|
return jsonify({"error": "Plot session not found"}), 404
|
|
except Exception as e:
|
|
return jsonify({"error": str(e)}), 500
|
|
|
|
|
|
@app.route("/api/plots/variables", methods=["GET"])
|
|
def get_plot_variables():
|
|
"""Get available variables for plotting"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
available_vars = streamer.data_streamer.plot_manager.get_available_variables(
|
|
streamer.data_streamer.get_active_datasets(),
|
|
streamer.config_manager.datasets,
|
|
)
|
|
|
|
boolean_vars = streamer.data_streamer.plot_manager.get_boolean_variables(
|
|
streamer.data_streamer.get_active_datasets(),
|
|
streamer.config_manager.datasets,
|
|
)
|
|
|
|
return jsonify(
|
|
{
|
|
"available_variables": available_vars,
|
|
"boolean_variables": boolean_vars,
|
|
"active_datasets_count": len(
|
|
streamer.data_streamer.get_active_datasets()
|
|
),
|
|
}
|
|
)
|
|
except Exception as e:
|
|
return jsonify({"error": str(e)}), 500
|
|
|
|
|
|
@app.route("/api/status")
|
|
def get_status():
|
|
"""Get current status"""
|
|
if streamer is None:
|
|
return jsonify({"error": "Application not initialized"}), 503
|
|
return jsonify(streamer.get_status())
|
|
|
|
|
|
@app.route("/api/events")
|
|
def get_events():
|
|
"""Get recent events from the application log"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
try:
|
|
limit = request.args.get("limit", 50, type=int)
|
|
limit = min(limit, 200) # Maximum 200 events per request
|
|
|
|
events = streamer.get_recent_events(limit)
|
|
return jsonify(
|
|
{
|
|
"success": True,
|
|
"events": events,
|
|
"total_events": len(streamer.event_logger.events_log),
|
|
"showing": len(events),
|
|
}
|
|
)
|
|
except Exception as e:
|
|
return jsonify({"success": False, "error": str(e)}), 500
|
|
|
|
|
|
@app.route("/api/stream/variables", methods=["GET"])
|
|
def stream_variables():
|
|
"""Stream variable values in real-time using Server-Sent Events"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
# Get request parameters outside the generator
|
|
dataset_id = request.args.get("dataset_id")
|
|
interval = float(request.args.get("interval", 1.0)) # Default 1 second
|
|
|
|
if not dataset_id:
|
|
return jsonify({"error": "Dataset ID required"}), 400
|
|
|
|
if dataset_id not in streamer.datasets:
|
|
return jsonify({"error": f"Dataset {dataset_id} not found"}), 404
|
|
|
|
def generate():
|
|
"""Generate SSE data stream - CACHE ONLY"""
|
|
|
|
# Send initial connection message
|
|
yield f"data: {json.dumps({'type': 'connected', 'message': 'SSE connection established - monitoring cache'})}\n\n"
|
|
|
|
last_values = {}
|
|
|
|
while True:
|
|
try:
|
|
# Check basic preconditions for cache availability
|
|
if not streamer.plc_client.is_connected():
|
|
# PLC not connected - cache won't be populated
|
|
data = {
|
|
"type": "plc_disconnected",
|
|
"message": "PLC not connected - cache not being populated",
|
|
"timestamp": datetime.now().isoformat(),
|
|
}
|
|
yield f"data: {json.dumps(data)}\n\n"
|
|
time.sleep(interval)
|
|
continue
|
|
|
|
# Check if dataset is active
|
|
if dataset_id not in streamer.active_datasets:
|
|
data = {
|
|
"type": "dataset_inactive",
|
|
"message": f"Dataset '{dataset_id}' is not active - activate to populate cache",
|
|
"timestamp": datetime.now().isoformat(),
|
|
}
|
|
yield f"data: {json.dumps(data)}\n\n"
|
|
time.sleep(interval)
|
|
continue
|
|
|
|
# Get dataset variables
|
|
dataset_variables = streamer.get_dataset_variables(dataset_id)
|
|
|
|
if not dataset_variables:
|
|
# No variables in dataset
|
|
data = {
|
|
"type": "no_variables",
|
|
"message": "No variables defined in this dataset",
|
|
"timestamp": datetime.now().isoformat(),
|
|
}
|
|
yield f"data: {json.dumps(data)}\n\n"
|
|
time.sleep(interval)
|
|
continue
|
|
|
|
# Get cached values - the ONLY source according to application principles
|
|
if not streamer.has_cached_values(dataset_id):
|
|
# No cache available yet - dataset might be starting up
|
|
sampling_interval = (
|
|
streamer.config_manager.get_dataset_sampling_interval(
|
|
dataset_id
|
|
)
|
|
)
|
|
data = {
|
|
"type": "no_cache",
|
|
"message": f"Waiting for cache to be populated (dataset reads every {sampling_interval}s)",
|
|
"timestamp": datetime.now().isoformat(),
|
|
"sampling_interval": sampling_interval,
|
|
}
|
|
yield f"data: {json.dumps(data)}\n\n"
|
|
time.sleep(interval)
|
|
continue
|
|
|
|
# Get cached values (the ONLY valid source)
|
|
read_result = streamer.get_cached_dataset_values(dataset_id)
|
|
|
|
if read_result.get("success", False):
|
|
values = read_result.get("values", {})
|
|
timestamp = read_result.get("timestamp", datetime.now().isoformat())
|
|
|
|
# Format values for display
|
|
formatted_values = {}
|
|
for var_name, value in values.items():
|
|
if value is not None:
|
|
var_config = dataset_variables[var_name]
|
|
var_type = var_config.get("type", "unknown")
|
|
|
|
try:
|
|
if var_type == "real":
|
|
formatted_values[var_name] = (
|
|
f"{value:.3f}"
|
|
if isinstance(value, (int, float))
|
|
else str(value)
|
|
)
|
|
elif var_type == "bool":
|
|
formatted_values[var_name] = (
|
|
"TRUE" if value else "FALSE"
|
|
)
|
|
elif var_type in [
|
|
"int",
|
|
"uint",
|
|
"dint",
|
|
"udint",
|
|
"word",
|
|
"byte",
|
|
"sint",
|
|
"usint",
|
|
]:
|
|
formatted_values[var_name] = (
|
|
str(int(value))
|
|
if isinstance(value, (int, float))
|
|
else str(value)
|
|
)
|
|
else:
|
|
formatted_values[var_name] = str(value)
|
|
except:
|
|
formatted_values[var_name] = "FORMAT_ERROR"
|
|
else:
|
|
formatted_values[var_name] = "ERROR"
|
|
|
|
# Only send if values changed
|
|
if formatted_values != last_values:
|
|
data = {
|
|
"type": "values",
|
|
"values": formatted_values,
|
|
"timestamp": timestamp,
|
|
"source": "cache",
|
|
"stats": read_result.get("stats", {}),
|
|
"cache_age_info": f"Dataset reads every {streamer.config_manager.get_dataset_sampling_interval(dataset_id)}s",
|
|
}
|
|
yield f"data: {json.dumps(data)}\n\n"
|
|
last_values = formatted_values.copy()
|
|
else:
|
|
# Send error data from cache
|
|
error_data = {
|
|
"type": "cache_error",
|
|
"message": read_result.get(
|
|
"error", "Cached data indicates error"
|
|
),
|
|
"timestamp": datetime.now().isoformat(),
|
|
"error_type": read_result.get("error_type", "unknown"),
|
|
"source": "cache",
|
|
}
|
|
yield f"data: {json.dumps(error_data)}\n\n"
|
|
|
|
time.sleep(interval)
|
|
|
|
except Exception as e:
|
|
error_data = {
|
|
"type": "stream_error",
|
|
"message": f"SSE stream error: {str(e)}",
|
|
"timestamp": datetime.now().isoformat(),
|
|
"source": "cache_monitoring",
|
|
}
|
|
yield f"data: {json.dumps(error_data)}\n\n"
|
|
time.sleep(interval)
|
|
|
|
return Response(
|
|
generate(),
|
|
mimetype="text/event-stream",
|
|
headers={
|
|
"Cache-Control": "no-cache",
|
|
"Connection": "keep-alive",
|
|
"Access-Control-Allow-Origin": "*",
|
|
"Access-Control-Allow-Headers": "Cache-Control",
|
|
},
|
|
)
|
|
|
|
|
|
@app.route("/api/stream/status", methods=["GET"])
|
|
def stream_status():
|
|
"""Stream application status in real-time using Server-Sent Events"""
|
|
error_response = check_streamer_initialized()
|
|
if error_response:
|
|
return error_response
|
|
|
|
# Get request parameters outside the generator
|
|
interval = float(request.args.get("interval", 2.0)) # Default 2 seconds
|
|
|
|
def generate():
|
|
"""Generate SSE status stream"""
|
|
last_status = None
|
|
|
|
# Send initial connection message
|
|
yield f"data: {json.dumps({'type': 'connected', 'message': 'Status stream connected'})}\n\n"
|
|
|
|
while True:
|
|
try:
|
|
# Get current status
|
|
current_status = streamer.get_status()
|
|
|
|
# Only send if status changed
|
|
if current_status != last_status:
|
|
data = {
|
|
"type": "status",
|
|
"status": current_status,
|
|
"timestamp": datetime.now().isoformat(),
|
|
}
|
|
yield f"data: {json.dumps(data)}\n\n"
|
|
last_status = current_status
|
|
|
|
time.sleep(interval)
|
|
|
|
except Exception as e:
|
|
error_data = {
|
|
"type": "error",
|
|
"message": f"Status stream error: {str(e)}",
|
|
"timestamp": datetime.now().isoformat(),
|
|
}
|
|
yield f"data: {json.dumps(error_data)}\n\n"
|
|
time.sleep(interval)
|
|
|
|
return Response(
|
|
generate(),
|
|
mimetype="text/event-stream",
|
|
headers={
|
|
"Cache-Control": "no-cache",
|
|
"Connection": "keep-alive",
|
|
"Access-Control-Allow-Origin": "*",
|
|
"Access-Control-Allow-Headers": "Cache-Control",
|
|
},
|
|
)
|
|
|
|
|
|
def graceful_shutdown():
|
|
"""Perform graceful shutdown"""
|
|
print("\n⏹️ Performing graceful shutdown...")
|
|
try:
|
|
streamer.stop_streaming()
|
|
streamer.disconnect_plc()
|
|
streamer.release_instance_lock()
|
|
print("✅ Shutdown completed successfully")
|
|
except Exception as e:
|
|
print(f"⚠️ Error during shutdown: {e}")
|
|
|
|
|
|
def main():
|
|
"""Main application entry point with error handling and recovery"""
|
|
max_retries = 3
|
|
retry_count = 0
|
|
|
|
while retry_count < max_retries:
|
|
try:
|
|
# Create templates directory if it doesn't exist
|
|
os.makedirs("templates", exist_ok=True)
|
|
|
|
print("🚀 Starting Flask server for PLC S7-315 Streamer")
|
|
print("📊 Web interface available at: http://localhost:5050")
|
|
print("🔧 Configure your PLC and variables through the web interface")
|
|
|
|
# Initialize streamer (this will handle instance locking and auto-recovery)
|
|
global streamer
|
|
|
|
# Start Flask application
|
|
app.run(debug=False, host="0.0.0.0", port=5050, use_reloader=False)
|
|
|
|
# If we reach here, the server stopped normally
|
|
break
|
|
|
|
except RuntimeError as e:
|
|
if "Another instance" in str(e):
|
|
print(f"❌ {e}")
|
|
print("💡 Tip: Stop the other instance or wait for it to finish")
|
|
sys.exit(1)
|
|
else:
|
|
print(f"⚠️ Runtime error: {e}")
|
|
retry_count += 1
|
|
|
|
except KeyboardInterrupt:
|
|
print("\n⏸️ Received interrupt signal...")
|
|
graceful_shutdown()
|
|
break
|
|
|
|
except Exception as e:
|
|
print(f"💥 Unexpected error: {e}")
|
|
retry_count += 1
|
|
|
|
if retry_count < max_retries:
|
|
print(f"🔄 Attempting restart ({retry_count}/{max_retries})...")
|
|
time.sleep(2) # Wait before retry
|
|
else:
|
|
print("❌ Maximum retries reached. Exiting...")
|
|
graceful_shutdown()
|
|
sys.exit(1)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
try:
|
|
# Initialize streamer instance
|
|
streamer = PLCDataStreamer()
|
|
main()
|
|
except Exception as e:
|
|
print(f"💥 Critical error during initialization: {e}")
|
|
sys.exit(1)
|