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Per Google, sites are encouraged to upgrade from Universal Analytics v3 `analytics.js` to v4 `gtag.js` for Google Analytics tracking. We're giving admins the option to stay on the v3 API or migrate to v4. Admins can change the implementation they're using via the `ga_version` site setting. Eventually Google will deprecate v3, but our implementation gives admins the choice on what to use for now. We chose this implementation to make the change less error prone, as many site admins are using custom events via the v3 UA API. With the site stetting defaulted to `v3_analytics`, site analytics won't break until the admin is ready to make the migration. Additionally, in the v4 implementation, we do not enable automatic pageview tracking (on by default in the v4 API). Instead we rely on Discourse's page change API to report pageviews on transition to avoid double-tracking.
78 lines
2.5 KiB
Ruby
78 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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require_dependency 'content_security_policy'
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class ContentSecurityPolicy
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class Default
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attr_reader :directives
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def initialize(base_url:)
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@base_url = base_url
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@directives = {}.tap do |directives|
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directives[:base_uri] = [:none]
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directives[:object_src] = [:none]
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directives[:script_src] = script_src
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directives[:worker_src] = worker_src
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directives[:report_uri] = report_uri if SiteSetting.content_security_policy_collect_reports
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end
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end
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private
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def base_url
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@base_url
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end
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SCRIPT_ASSET_DIRECTORIES = [
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# [dir, can_use_s3_cdn, can_use_cdn, for_worker]
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['/assets/', true, true, true],
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['/brotli_asset/', true, true, true],
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['/extra-locales/', false, false, false],
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['/highlight-js/', false, true, false],
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['/javascripts/', false, true, true],
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['/plugins/', false, true, true],
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['/theme-javascripts/', false, true, false],
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['/svg-sprite/', false, true, false],
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]
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def script_assets(base = base_url, s3_cdn = GlobalSetting.s3_cdn_url, cdn = GlobalSetting.cdn_url, worker: false)
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SCRIPT_ASSET_DIRECTORIES.map do |dir, can_use_s3_cdn, can_use_cdn, for_worker|
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next if worker && !for_worker
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if can_use_s3_cdn && s3_cdn
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s3_cdn + dir
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elsif can_use_cdn && cdn
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cdn + Discourse.base_path + dir
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else
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base + dir
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end
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end.compact
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end
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def script_src
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[
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"#{base_url}/logs/",
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"#{base_url}/sidekiq/",
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"#{base_url}/mini-profiler-resources/",
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*script_assets
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].tap do |sources|
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sources << :report_sample if SiteSetting.content_security_policy_collect_reports
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sources << :unsafe_eval if Rails.env.development? # TODO remove this once we have proper source maps in dev
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# we need analytics.js still as gtag/js is a script wrapper for it
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sources << 'https://www.google-analytics.com/analytics.js' if SiteSetting.ga_universal_tracking_code.present?
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sources << 'https://www.googletagmanager.com/gtag/js' if SiteSetting.ga_universal_tracking_code.present? && SiteSetting.ga_version == "v4_gtag"
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sources << 'https://www.googletagmanager.com/gtm.js' if SiteSetting.gtm_container_id.present?
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end
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end
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def worker_src
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[
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"'self'", # For service worker
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*script_assets(worker: true)
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]
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end
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def report_uri
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"#{base_url}/csp_reports"
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end
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end
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end
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