cnn-metrics/lib/plugins/httpserver/request.js

CNN Metrics

'use strict';

const metrics = require('metrics'),
    validMetricURL = require('../urlhelper.js'),
    debug = require('debug')('metrics');

let HttpRequest = module.exports = function HttpRequest(opts) {
    this.counter = new metrics.Counter();
    this.devCounter = new metrics.Counter();
    this.reporter = this.reporter.bind(this);
    this.isDebugging = (opts && opts.isDebugging) ? true : false;
};

HttpRequest.prototype.instrument = function (request) {
    if (!request._Instrumented) {
        let url = `${request.connection.info.protocol}://${request.info.host}${request.url.path}`;

        if (this.isDebugging === true) {
            debug(url);
        }

        if (validMetricURL(url)) {
            this.counter.inc(1);
        } else {
            this.devCounter.inc(1);
        }
        request._Instrumented = true;
    }
};

HttpRequest.prototype.counts = function () {
    return {
        'http.request.count': this.counter.count,
        'http.request.check.count': this.devCounter.count
    };
};

HttpRequest.prototype.reset = function () {
    this.counter.clear();
    this.devCounter.clear();
};


HttpRequest.prototype.reporter = function () {
    var counts = this.counts();
    this.reset();
    return counts;
};