import subprocessfrom flask import Flask render_template request jsonify Responseapp = Flask__name__ template_folder=Dpythonwebpingprocess = Noneoutput_list = stream_list = approutedef index return

您可以尝试使用SocketIO来实现实时输出到网页上。首先，需要安装flask-socketio库：

pip install flask-socketio

然后，修改代码如下：

import subprocess
from flask import Flask, render_template, request, jsonify
from flask_socketio import SocketIO

app = Flask(__name__, template_folder='D:\\python\\webping')
app.config['SECRET_KEY'] = 'secret_key'
socketio = SocketIO(app)

process = None

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/start', methods=['POST'])
def start():
    global process
    if process:
        return jsonify({'message': 'Command already running.'})

    process = subprocess.Popen(['ping', '-t', '114.114.114.114'], stdout=subprocess.PIPE, universal_newlines=True)

    def stream():
        i = 0
        while process and process.poll() is None:
            output = process.stdout.readline().strip()

            i+=1
            print(i,output)
            socketio.emit('stream_output', output)
        
    socketio.start_background_task(stream)
    return jsonify({'message': 'Command started.'})

@app.route('/stop', methods=['POST'])
def stop():
    global process
    if process:
        process.terminate()
        process = None
        return jsonify({'message': 'Command stopped.'})
    else:
        return jsonify({'message': 'No command running.'})

if __name__ == '__main__':
    socketio.run(app)

然后，在index.html文件中添加以下代码：

<!DOCTYPE html>
<html>
<head>
    <title>Web Ping</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.1/socket.io.js"></script>
</head>
<body>
    <h1>Web Ping</h1>
    <button id="start-button">Start</button>
    <button id="stop-button">Stop</button>
    <div id="output"></div>

    <script>
        var socket = io();

        socket.on('stream_output', function(output) {
            var outputDiv = document.getElementById('output');
            outputDiv.innerHTML += output + '<br>';
        });

        document.getElementById('start-button').addEventListener('click', function() {
            fetch('/start', {method: 'POST'})
                .then(response => response.json())
                .then(data => console.log(data));
        });

        document.getElementById('stop-button').addEventListener('click', function() {
            fetch('/stop', {method: 'POST'})
                .then(response => response.json())
                .then(data => console.log(data));
        });
    </script>
</body>
</html>

这样，当点击"Start"按钮时，会启动ping命令并将输出实时显示在网页上；点击"Stop"按钮时，会停止ping命令

import subprocessfrom flask import Flask render_template request jsonify Responseapp = Flask__name__ template_folder=Dpythonwebpingprocess = Noneoutput_list = stream_list = approutedef index return