lib/node_tracers.js
function RawZipkinQueryServiceHTTPTracer(traceUrl) {
  if (traceUrl.charAt(traceUrl.length - 1) === '/') {
    traceUrl = traceUrl.slice(0, -1);
  }

  this._traceUrl = traceUrl;

  EndAnnotationTracer.call(this, this.sendTraces);
}
function RawZipkinQueryServiceHTTPTracer(traceUrl) {
  if (traceUrl.charAt(traceUrl.length - 1) === '/') {
    traceUrl = traceUrl.slice(0, -1);
  }

  this._traceUrl = traceUrl;

  EndAnnotationTracer.call(this, this.sendTraces);
}
A tracer that records directly to Zipkin Query HTTP API.

This implementation posts all annotations to /api/v1/spans
immediately and does not implement buffering of any sort.

@param {String} traceUrl The URL to the Zipkin query endpoint.
For example: https://example.com.