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分离服务和窗口

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服务添加文件锁
This commit is contained in:
murmur 2024-07-04 23:14:15 +08:00
parent b5772fab60
commit 350f52ead5
2 changed files with 105 additions and 7 deletions
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50
amis-flask-pywebview-demo/app.py
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@ -1,9 +1,9 @@
from flask import Flask, jsonify, render_template,request from flask import Flask, jsonify, render_template,request
import json import json
import webview
import os import os
import sys import sys
import filelock
def resource_path(relative_path): def resource_path(relative_path):
""" Get absolute path to resource, works for dev and for PyInstaller """ """ Get absolute path to resource, works for dev and for PyInstaller """
@ -33,14 +33,50 @@ def submit():
return jsonify({"code": 0, "msg": "恭喜，注册成功！"}) return jsonify({"code": 0, "msg": "恭喜，注册成功！"})
# 定义锁文件的路径
LOCKFILE = 'app.lock'
def acquire_lock(lock_file):
"""
获取文件锁
Args:
lock_file: 锁文件路径
Returns:
FileLock 对象 如果成功获取锁，None 否则
"""
try:
lock = filelock.FileLock(lock_file)
lock.acquire(timeout=1)
return lock
except filelock.Timeout:
return None
def release_lock(lock):
if lock:
lock.release()
def start_flask(): def start_flask():
app.run(debug=True, port=5000, use_reloader=False) app.run(debug=True, port=5000, use_reloader=False)
if __name__ == '__main__': if __name__ == '__main__':
import threading # 以进程方式运行服务
flask_thread = threading.Thread(target=start_flask) # import threading
flask_thread.daemon = True # flask_thread = threading.Thread(target=start_flask)
flask_thread.start() # flask_thread.daemon = True
# flask_thread.start()
webview.create_window("demo","http://127.0.0.1:5000")
webview.start(debug=True) lock = acquire_lock(LOCKFILE)
if not lock:
print("Another instance is already running. Exiting...")
sys.exit(1)
# 启动 Flask 服务器
print("Starting Flask server...")
start_flask()
# 服务器启动后，下面的代码将不会被立即执行，直到服务器停止
print("This line will not be executed until the server stops.")
release_lock(lock)

62
amis-flask-pywebview-demo/window.py Normal file
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@ -0,0 +1,62 @@
import webview
import socket
import sys
ERROR_PAGE_CONTENT = """
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Error</title>
<style>
body {
display: flex;
justify-content: center;
align-items: center;
height: 96vh;
background-color: #f8d7da;
color: #721c24;
font-family: Arial, sans-serif;
}
.container {
text-align: center;
}
h1 {
font-size: 2em;
}
p {
font-size: 1.2em;
}
</style>
</head>
<body>
<div class="container">
<h1>Service Not Available</h1>
<p>No service is running on port 5000. Please start the Flask server first.</p>
</div>
</body>
</html>
"""
def is_port_in_use(port):
"""
检查指定端口是否被占用。
参数:
port (int): 要检查的端口号。
返回:
bool: 如果端口被占用，则返回 True；否则返回 False。
"""
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
return s.connect_ex(('127.0.0.1', port)) == 0
if __name__ == '__main__':
port = 5000
if is_port_in_use(port):
webview.create_window("Demo", f"http://127.0.0.1:{port}",fullscreen=False)
else:
webview.create_window("Error", html=ERROR_PAGE_CONTENT,fullscreen=False)
webview.start()