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9361d9a587
Certain rogue bots such as Yandex may send across invalid CSP reports when CSP report collection is enabled. This ensures that invalid reports will not cause log floods and simply returns a 422 error. Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>
51 lines
1.2 KiB
Ruby
51 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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class CspReportsController < ApplicationController
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skip_before_action :check_xhr, :preload_json, :verify_authenticity_token, only: [:create]
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def create
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raise Discourse::NotFound unless report_collection_enabled?
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report = parse_report
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if report.blank?
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render_json_error("empty CSP report", status: 422)
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else
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Logster.add_to_env(request.env, 'CSP Report', report)
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Rails.logger.warn("CSP Violation: '#{report['blocked-uri']}' \n\n#{report['script-sample']}")
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head :ok
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end
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rescue JSON::ParserError
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render_json_error("invalid CSP report", status: 422)
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end
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private
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def parse_report
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obj = JSON.parse(request.body.read)
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if Hash === obj
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obj = obj['csp-report']
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if Hash === obj
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obj.slice(
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'blocked-uri',
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'disposition',
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'document-uri',
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'effective-directive',
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'original-policy',
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'referrer',
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'script-sample',
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'status-code',
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'violated-directive',
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'line-number',
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'source-file'
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)
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end
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end
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end
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def report_collection_enabled?
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SiteSetting.content_security_policy_collect_reports
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end
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end
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