|
| 1 | +'use strict'; |
| 2 | + |
| 3 | +const fs = require('fs'); |
| 4 | +const opentelemetry = require('@opentelemetry/core'); |
| 5 | +const config = require('./setup'); |
| 6 | +/** |
| 7 | + * The trace instance needs to be initialized first, if you want to enable |
| 8 | + * automatic tracing for built-in plugins (HTTPs in this case). |
| 9 | + */ |
| 10 | +config.setupTracerAndExporters('https-server-service'); |
| 11 | + |
| 12 | +const https = require('https'); |
| 13 | +const tracer = opentelemetry.getTracer(); |
| 14 | + |
| 15 | +/** Starts a HTTPs server that receives requests on sample server port. */ |
| 16 | +function startServer (port) { |
| 17 | + const options = { |
| 18 | + key: fs.readFileSync('./server-key.pem'), |
| 19 | + cert: fs.readFileSync('./server-cert.pem') |
| 20 | + }; |
| 21 | + // Creates a server |
| 22 | + const server = https.createServer(options, handleRequest); |
| 23 | + // Starts the server |
| 24 | + server.listen(port, err => { |
| 25 | + if (err) { |
| 26 | + throw err; |
| 27 | + } |
| 28 | + console.log(`Node HTTPs listening on ${port}`); |
| 29 | + }); |
| 30 | +} |
| 31 | + |
| 32 | +/** A function which handles requests and send response. */ |
| 33 | +function handleRequest (request, response) { |
| 34 | + const currentSpan = tracer.getCurrentSpan(); |
| 35 | + // display traceid in the terminal |
| 36 | + console.log(`traceid: ${currentSpan.context().traceId}`); |
| 37 | + const span = tracer.startSpan('handleRequest', { |
| 38 | + parent: currentSpan, |
| 39 | + kind: 1, // server |
| 40 | + attributes: { key:'value' } |
| 41 | + }); |
| 42 | + // Annotate our span to capture metadata about the operation |
| 43 | + span.addEvent('invoking handleRequest'); |
| 44 | + try { |
| 45 | + let body = []; |
| 46 | + request.on('error', err => console.log(err)); |
| 47 | + request.on('data', chunk => body.push(chunk)); |
| 48 | + request.on('end', () => { |
| 49 | + // deliberately sleeping to mock some action. |
| 50 | + setTimeout(() => { |
| 51 | + span.end(); |
| 52 | + response.end('Hello World!'); |
| 53 | + }, 2000); |
| 54 | + }); |
| 55 | + } catch (err) { |
| 56 | + console.log(err); |
| 57 | + span.end(); |
| 58 | + } |
| 59 | +} |
| 60 | + |
| 61 | +startServer(443); |
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