From af6e3e57e4c0ee861e26310c65be2e5e8547ca68 Mon Sep 17 00:00:00 2001
From: "Luke \"Jared\" Bennett" <lbennett@gitlab.com>
Date: Tue, 18 Apr 2017 18:58:03 +0100
Subject: Added sampling function and blacklisted common urls and error
 messages

---
 app/assets/javascripts/raven/raven_config.js | 53 ++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

(limited to 'app/assets/javascripts/raven')

diff --git a/app/assets/javascripts/raven/raven_config.js b/app/assets/javascripts/raven/raven_config.js
index 9c756a4130b..6c20cd9aabd 100644
--- a/app/assets/javascripts/raven/raven_config.js
+++ b/app/assets/javascripts/raven/raven_config.js
@@ -1,6 +1,52 @@
 import Raven from 'raven-js';
 
+const IGNORE_ERRORS = [
+  // Random plugins/extensions
+  'top.GLOBALS',
+  // See: http://blog.errorception.com/2012/03/tale-of-unfindable-js-error. html
+  'originalCreateNotification',
+  'canvas.contentDocument',
+  'MyApp_RemoveAllHighlights',
+  'http://tt.epicplay.com',
+  'Can\'t find variable: ZiteReader',
+  'jigsaw is not defined',
+  'ComboSearch is not defined',
+  'http://loading.retry.widdit.com/',
+  'atomicFindClose',
+  // Facebook borked
+  'fb_xd_fragment',
+  // ISP "optimizing" proxy - `Cache-Control: no-transform` seems to
+  // reduce this. (thanks @acdha)
+  // See http://stackoverflow.com/questions/4113268
+  'bmi_SafeAddOnload',
+  'EBCallBackMessageReceived',
+  // See http://toolbar.conduit.com/Developer/HtmlAndGadget/Methods/JSInjection.aspx
+  'conduitPage',
+];
+
+const IGNORE_URLS = [
+  // Facebook flakiness
+  /graph\.facebook\.com/i,
+  // Facebook blocked
+  /connect\.facebook\.net\/en_US\/all\.js/i,
+  // Woopra flakiness
+  /eatdifferent\.com\.woopra-ns\.com/i,
+  /static\.woopra\.com\/js\/woopra\.js/i,
+  // Chrome extensions
+  /extensions\//i,
+  /^chrome:\/\//i,
+  // Other plugins
+  /127\.0\.0\.1:4001\/isrunning/i,  // Cacaoweb
+  /webappstoolbarba\.texthelp\.com\//i,
+  /metrics\.itunes\.apple\.com\.edgesuite\.net\//i,
+];
+
+const SAMPLE_RATE = 95;
+
 const RavenConfig = {
+  IGNORE_ERRORS,
+  IGNORE_URLS,
+  SAMPLE_RATE,
   init(options = {}) {
     this.options = options;
 
@@ -13,6 +59,9 @@ const RavenConfig = {
     Raven.config(this.options.sentryDsn, {
       whitelistUrls: this.options.whitelistUrls,
       environment: this.options.isProduction ? 'production' : 'development',
+      ignoreErrors: this.IGNORE_ERRORS,
+      ignoreUrls: this.IGNORE_URLS,
+      shouldSendCallback: this.shouldSendSample,
     }).install();
   },
 
@@ -42,6 +91,10 @@ const RavenConfig = {
       },
     });
   },
+
+  shouldSendSample() {
+    return Math.random() * 100 <= this.SAMPLE_RATE;
+  },
 };
 
 export default RavenConfig;
-- 
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