50 lines
No EOL
1.4 KiB
JavaScript
50 lines
No EOL
1.4 KiB
JavaScript
const fs = require('fs');
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const v8 = require('v8');
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const location = '/tmp/';
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async function createHeapSnapshot() {
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const fileName = `${Date.now()}.heapsnapshot`;
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await fs.promises.writeFile(
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location + fileName,
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v8.getHeapSnapshot()
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);
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return fileName;
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}
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async function sendHeapSnapshot(req, res) {
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const fileName = await createHeapSnapshot();
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const file = fs.readFileSync(location + fileName, 'binary');
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const stat = fs.statSync(location + fileName);
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res.setHeader('Content-Length', stat.size);
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res.setHeader('Content-Type', 'audio/mpeg');
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res.setHeader('Content-Disposition', 'attachment; filename=' + fileName);
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res.write(file, 'binary');
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res.end();
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try {
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fs.unlinkSync(location + fileName)
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} catch (err) {
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console.error("error while deleting heapsnapshot file");
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console.error(err);
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}
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}
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process.on('USR2', () => {
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console.info('USR2 signal received.');
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});
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async function saveHeapSnapshot(req, res) {
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const fileName = await createHeapSnapshot();
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const path = location + fileName;
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console.log(`Heapdump saved to ${path}`)
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res.statusCode = 200;
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res.setHeader('Content-Type', 'application/json');
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res.end(JSON.stringify({path}));
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}
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process.on('USR2', () => {
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console.info('USR2 signal received.');
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});
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module.exports = {sendHeapSnapshot, saveHeapSnapshot} |