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77 lines
3.2 KiB
JavaScript
77 lines
3.2 KiB
JavaScript
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/*
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* decaffeinate suggestions:
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* DS102: Remove unnecessary code created because of implicit returns
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* DS103: Rewrite code to no longer use __guard__
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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const os = require("os");
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const yn = require("yn");
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const STACKDRIVER_LOGGING = yn(process.env['STACKDRIVER_LOGGING']);
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module.exports.monitor = logger => (function(req, res, next) {
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const Metrics = require("./metrics");
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const startTime = process.hrtime();
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const {
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end
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} = res;
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res.end = function() {
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let info;
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end.apply(this, arguments);
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const responseTime = process.hrtime(startTime);
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const responseTimeMs = Math.round((responseTime[0] * 1000) + (responseTime[1] / 1000000));
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const requestSize = parseInt(req.headers["content-length"], 10);
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if ((req.route != null ? req.route.path : undefined) != null) {
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const routePath = req.route.path.toString().replace(/\//g, '_').replace(/\:/g, '').slice(1);
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Metrics.timing("http_request", responseTimeMs, null, {method:req.method, status_code: res.statusCode, path:routePath});
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if (requestSize) {
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Metrics.summary("http_request_size_bytes", requestSize, {method:req.method, status_code: res.statusCode, path:routePath});
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}
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}
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const remoteIp = req.ip || __guard__(req.socket != null ? req.socket.socket : undefined, x => x.remoteAddress) || (req.socket != null ? req.socket.remoteAddress : undefined);
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const reqUrl = req.originalUrl || req.url;
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const referrer = req.headers['referer'] || req.headers['referrer'];
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if (STACKDRIVER_LOGGING) {
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info = {
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httpRequest: {
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requestMethod: req.method,
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requestUrl: reqUrl,
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requestSize,
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status: res.statusCode,
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responseSize: (res._headers != null ? res._headers["content-length"] : undefined),
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userAgent: req.headers["user-agent"],
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remoteIp,
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referer: referrer,
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latency: {
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seconds: responseTime[0],
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nanos: responseTime[1]
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},
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protocol: req.protocol
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}
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};
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} else {
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info = {
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req: {
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url: reqUrl,
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method: req.method,
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referrer,
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"remote-addr": remoteIp,
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"user-agent": req.headers["user-agent"],
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"content-length": req.headers["content-length"]
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},
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res: {
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"content-length": (res._headers != null ? res._headers["content-length"] : undefined),
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statusCode: res.statusCode
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},
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"response-time": responseTimeMs
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};
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}
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return logger.info(info, "%s %s", req.method, reqUrl);
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};
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return next();
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});
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function __guard__(value, transform) {
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return (typeof value !== 'undefined' && value !== null) ? transform(value) : undefined;
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}
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