web-check/api/carbon.js

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const https = require('https');
const middleware = require('./_common/middleware');
const handler = async (url) => {
// First, get the size of the website's HTML
const getHtmlSize = (url) => new Promise((resolve, reject) => {
https.get(url, res => {
let data = '';
res.on('data', chunk => {
data += chunk;
});
res.on('end', () => {
const sizeInBytes = Buffer.byteLength(data, 'utf8');
resolve(sizeInBytes);
});
}).on('error', reject);
});
try {
const sizeInBytes = await getHtmlSize(url);
const apiUrl = `https://api.websitecarbon.com/data?bytes=${sizeInBytes}&green=0`;
// Then use that size to get the carbon data
const carbonData = await new Promise((resolve, reject) => {
https.get(apiUrl, res => {
let data = '';
res.on('data', chunk => {
data += chunk;
});
res.on('end', () => {
resolve(JSON.parse(data));
});
}).on('error', reject);
});
if (!carbonData.statistics || (carbonData.statistics.adjustedBytes === 0 && carbonData.statistics.energy === 0)) {
return {
statusCode: 200,
body: JSON.stringify({ skipped: 'Not enough info to get carbon data' }),
};
}
carbonData.scanUrl = url;
return carbonData;
} catch (error) {
throw new Error(`Error: ${error.message}`);
}
};
module.exports = middleware(handler);
module.exports.handler = middleware(handler);