python-helpers/latency.js at main · letovo-dev/python-helpers · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
const express = require('express');
const http = require('http');
const WebSocket = require('ws');
const fetch = require('node-fetch');
const fs = require('fs');
const { stringify } = require('querystring');

const TARGET_URLS = [
  'https://letovocorp.ru/api/auth/login',
  'https://letovocorp.ru/api/auth/isactive/scv',
  'https://letovocorp.ru/api/media/get/images/uploaded/virtual_1.png'
];

const METHODS = ['POST', 'GET', 'GET']

const POLL_INTERVAL = 5000;
const MAX_POINTS = 1000;
const latencyData = [[], [], []];

const app = express();
const server = http.createServer(app);
const wss = new WebSocket.Server({ server });

app.get('/', (req, res) => {
  res.send(`<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Letovo Latency Monitor</title>
  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/luxon@3/build/global/luxon.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-luxon@1"></script>
  <style>
    body { background-color: #1e1e1e; color: #ccc; }
    canvas { background-color: #2e2e2e; margin-bottom: 30px; }

    /* Панель кнопок */
    #panel {
      margin-bottom: 20px;
    }
    .button {
      display: inline-block;
      margin-right: 10px;
      padding: 10px 20px;
      background-color: #333;
      color: rgb(255, 255, 255);
      text-decoration: none;
      border-radius: 5px;
      transition: background-color 0.2s;
    }
    .button:hover {
      background-color: #555;
    }
  </style>
</head>
<body>
  <h2>Letovo Latency Monitor</h2>
  <div id="panel">
    <a href="/statistics" class="button">Statistics</a>
    <a href="http://10.8.0.1:8010/monitorix" class="button" target="_blank">Monitorix</a>
  </div>
  <canvas id="latencyChart" width="1000" height="500"></canvas>
  <script>
    const TARGET_NAMES = ['simple get', 'auth', 'get file'];
    const chart = new Chart(document.getElementById('latencyChart').getContext('2d'), {
      type: 'line',
      data: {
        datasets: TARGET_NAMES.map(name => ({
          label: name,
          data: [],
          borderWidth: 2,
          fill: false,
          borderColor: 'rgba(0,255,0,1)',
        }))
      },
      options: {
        animation: false,
        plugins: {
          legend: { labels: { color: '#ccc' }, display: true, position: 'top' },
          tooltip: {
            callbacks: {
              label: function(context) {
                const point = context.raw;
                return point ? ('Latency: ' + point.y.toFixed(1) + ' ms | ' + point.customData) : '';
              }
            }
          }
        },
        scales: {
          x: {
            type: 'time',
            time: { unit: 'minute', displayFormats: { minute: 'HH:mm:ss' } },
            ticks: { color: '#ccc' },
            grid: { color: '#444' }
          },
          y: {
            beginAtZero: true,
            title: { display: true, text: 'Latency (ms)', color: '#ccc' },
            ticks: { color: '#ccc' },
            grid: { color: '#444' }
          }
        }
      }
    });

    const socket = new WebSocket('wss://' + location.host + '/latency/letovo/');
    socket.onmessage = (event) => {
      const msg = JSON.parse(event.data);
      const idx = msg.idx;
      const points = msg.data;

      chart.data.datasets[idx].data = points.map(p => ({
        x: new Date(p.time),
        y: p.latency,
        customData: p.reqInfo
      }));

      if (points.length > 0) {
        const latestTime = new Date(points[points.length - 1].time).getTime();
        const RANGE = 45 * 60 * 1000;
        chart.options.scales.x.min = latestTime - RANGE;
        chart.options.scales.x.max = latestTime;
      }

      chart.data.datasets[idx].borderColor = msg.color;
      chart.update();
    };
  </script>
</body>
</html>`);
});

wss.on('connection', ws => {
  console.log('Client connected');
  // при подключении отправляем последние данные для каждого графика
  latencyData.forEach((dataArr, idx) => {
    const lastStatus = dataArr.length > 0 ? dataArr[dataArr.length - 1].status : 200;
    ws.send(JSON.stringify({ idx, data: dataArr, color: statusToColor(lastStatus) }));
  });
});

function measureLatency() {
  TARGET_URLS.forEach((url, idx) => {
    const startTime = Date.now();
    let options = { method: METHODS[idx] }
    if (METHODS[idx] === 'POST') {
      options.body = JSON.stringify({ login: '', password: '' }); // пример тела запроса
    }
    options.headers = {Cookie: 'AuthCookie=scv'}
    fetch(url, options)
      .then(res => res.text().then(body => ({ res, body })))
      .then(({ res }) => {
        const latency = Date.now() - startTime;
        const point = {
          time: new Date(),
          latency,
          reqInfo: `GET ${url} → ${res.status}`,
          status: res.status
        };
        latencyData[idx].push(point);
        if (latencyData[idx].length > MAX_POINTS) latencyData[idx].shift();

        const color = statusToColor(res.status, idx);
        console.log(color);
        const dataToSend = JSON.stringify({
          idx,
          data: latencyData[idx],
          color
        });
        wss.clients.forEach(client => {
          if (client.readyState === WebSocket.OPEN) {
            client.send(dataToSend);
          }
        });
        console.log(`[${point.time.toISOString()}] ${url} latency: ${latency} ms, status: ${res.status}`);
      })
      .catch(err => {
        const latency = Date.now() - startTime;
        const point = {
          time: new Date(),
          latency,
          reqInfo: `GET ${url} → ERROR: ${err.message}`,
          status: 0
        };
        latencyData[idx].push(point);
        if (latencyData[idx].length > MAX_POINTS) latencyData[idx].shift();

        const color = statusToColor(0);
        const dataToSend = JSON.stringify({
          idx,
          data: latencyData[idx],
          color
        });
        wss.clients.forEach(client => {
          if (client.readyState === WebSocket.OPEN) {
            client.send(dataToSend);
          }
        });
        console.error(`[${point.time.toISOString()}] ${url} fetch error: ${err.message}`);
      });
  });
}

function statusToColor(status, idx = 0, decresor=75) {
  if (status >= 200 && status < 300) return `rgba(0, ${255 - idx * decresor}, 0, 1)`;
  if (status >= 400 && status < 500) return `rgba(${255 - idx * decresor}, 200, 0, 1)`;
  if (status >= 500 || status === 0) return `rgba(${255 - idx * decresor}, 0, 0, 1)`;
  return 'rgba(255,0,0,1)';
}

setInterval(measureLatency, POLL_INTERVAL);

const PORT = 8080;
server.listen(PORT, () => {
  console.log(`Monitoring server running on http://localhost:${PORT}/`);
});