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Update index.js #43

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65 changes: 62 additions & 3 deletions index.js
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Original file line number Diff line number Diff line change
@@ -1,10 +1,69 @@
const http = require('http');
const https = require('https');
const fs = require('fs');
const port = process.env.PORT || 3000;

const azureStorageUrl = 'https://storagejoeri.blob.core.windows.net/dgjoeri/waardes.csv';

const server = http.createServer((req, res) => {
res.statusCode = 200;
const msg = 'Hello Node!\n'
res.end(msg);
if (req.method === 'GET') {
// Fetch and display the contents of waardes.csv
https.get(azureStorageUrl, (response) => {
let data = '';
response.on('data', (chunk) => {
data += chunk;
});

response.on('end', () => {
const lines = data.trim().split('\n');
const values = lines.map((line) => {
const columns = line.split(';');
return {
date: columns[0],
value: columns[1],
};
});

res.statusCode = 200;
res.setHeader('Content-Type', 'text/html');
res.write('<html><body>');

// Create a canvas for the chart
res.write('<canvas id="myChart" width="400" height="200"></canvas>');

// Generate the chart using Chart.js
res.write('<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>');
res.write('<script>');
res.write('var ctx = document.getElementById("myChart").getContext("2d");');
res.write('var labels = ' + JSON.stringify(values.map((line) => line.date)) + ';');
res.write('var data = ' + JSON.stringify(values.map((line) => line.value)) + ';');
res.write('var myChart = new Chart(ctx, {');
res.write('type: "line",');
res.write('data: {');
res.write('labels: labels,');
res.write('datasets: [{');
res.write('label: "Values",');
res.write('data: data,');
res.write('backgroundColor: "rgba(75, 192, 192, 0.2)",');
res.write('borderColor: "rgba(75, 192, 192, 1)",');
res.write('borderWidth: 1');
res.write('}]');
res.write('},');
res.write('options: {');
res.write('scales: {');
res.write('y: {');
res.write('beginAtZero: true');
res.write('}');
res.write('}');
res.write('}');
res.write('});');
res.write('</script>');

res.write('</body></html>');
res.end();
});
});
}
});

server.listen(port, () => {
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