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/speedtest.js:
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1 | const size = 1343591 * 8
2 | const TEST_COUNT = 20
3 |
4 | const image = new Image()
5 | image.src = './fastly.svg'
6 |
7 | const plugin = {
8 | id: 'customCanvasBackgroundImage',
9 | beforeDraw: chart => {
10 | if (image.complete) {
11 | const ctx = chart.ctx
12 | const { top, left, width, height } = chart.chartArea
13 | const x = left + width / 2 - image.width / 2
14 | const y = top + height / 2 - image.height / 2
15 | ctx.drawImage(image, x, y)
16 | } else {
17 | image.onload = () => chart.draw()
18 | }
19 | }
20 | }
21 |
22 | const data = {
23 | labels: [],
24 | datasets: [
25 | {
26 | label: 'Speed in MBps',
27 | data: [],
28 | fill: false,
29 | borderColor: 'rgb(75, 192, 192)',
30 | tension: 0.1
31 | }
32 | ]
33 | }
34 |
35 | const config = {
36 | type: 'line',
37 | data: data,
38 | plugins: [plugin],
39 | options: {
40 | scales: {
41 | y: {
42 | beginAtZero: true
43 | }
44 | }
45 | }
46 | }
47 |
48 | const ctx = document.getElementById('myChart')
49 |
50 | const chart = new Chart(ctx, config)
51 |
52 | const button = document.querySelector('button')
53 | const progress = document.querySelector('.progress')
54 | const speedText = document.querySelector('.speed-text')
55 | let tcpRequest = new XMLHttpRequest()
56 | let rtt = 5
57 |
58 | let test_results = []
59 |
60 | function loadImage () {
61 | return new Promise((resolve, reject) => {
62 | const img = new Image()
63 | img.src =
64 | './test.gif?' +
65 | parseInt(Math.random() * 100000)
66 | let startTime = Date.now()
67 |
68 | img.onload = function () {
69 | let endTime = Date.now()
70 | console.log({ startTime, endTime, d: endTime - startTime })
71 | resolve(endTime - startTime)
72 | }
73 |
74 | img.onerror = function (err) {
75 | reject(err)
76 | }
77 | })
78 | }
79 |
80 | async function getLoadSpeed () {
81 | let loadTime = await loadImage()
82 | if (loadTime < 1) loadTime = 1
83 | let speed_bps = (1000 * size) / (loadTime - rtt)
84 | let speed_mbps = speed_bps / 1048576
85 |
86 | return speed_mbps
87 | }
88 |
89 | function getAvgSpeed () {
90 | let sum = test_results.reduce((a, b) => a + b, 0)
91 |
92 | return sum / test_results.length
93 | }
94 |
95 | function addData (label, newData) {
96 | chart.data.labels.push(label)
97 | chart.data.datasets.forEach(dataset => {
98 | dataset.data.push(newData)
99 | })
100 | chart.update()
101 | }
102 |
103 | function removeData () {
104 | chart.data.labels.pop()
105 | chart.data.datasets.forEach(dataset => {
106 | dataset.data.pop()
107 | })
108 | chart.update()
109 | }
110 |
111 | fetch('/tcpinfo')
112 | .then(response => response.json())
113 | .then(data => (rtt = (data.rtt/1000)))
114 | .then(() => {
115 | button.addEventListener('click', async function (e) {
116 | e.preventDefault()
117 | speedText.innerText = 'Test Started ...'
118 | removeData()
119 | console.log("RTT " + rtt)
120 | for (let i = 0; i < TEST_COUNT; i++) {
121 | let speed = await getLoadSpeed()
122 | test_results.push(speed)
123 | progress.style.width = ((i + 1) / TEST_COUNT) * 100 + '%'
124 | addData(i, speed)
125 | console.log({ i, speed })
126 | speedText.innerText =
127 | 'Average Speed ' + getAvgSpeed().toFixed(2) + ' Mbps'
128 | }
129 | })
130 | })
131 | .catch(err => console.error(err))
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/fastly.svg:
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1 |
2 |
3 |
4 |
21 |
22 |
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/LICENSE:
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