This library will let you add interceptors to the rest client library.
const {Tracer} = require('zipkin');
const rest = require('rest');
const {restInterceptor} = require('zipkin-instrumentation-cujojs-rest');
const localServiceName = 'service-a'; // name of this application
const tracer = new Tracer({ctxImpl, recorder, localServiceName});
const remoteServiceName = 'youtube';
const client = rest.wrap(restInterceptor, {tracer, remoteServiceName});
// Your application code here
client('http://www.youtube.com/').then(success => {
console.log('got result from YouTube');
}, error => {
console.error('Error', error);
});