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What is the problem here? In multiple controllers, we are accepting a `limit` params but do not impose any upper bound on the values being accepted. Without an upper bound, we may be allowing arbituary users from generating DB queries which may end up exhausing the resources on the server. What is the fix here? A new `fetch_limit_from_params` helper method is introduced in `ApplicationController` that can be used by controller actions to safely get the limit from the params as a default limit and maximum limit has to be set. When an invalid limit params is encountered, the server will respond with the 400 response code.
121 lines
3.1 KiB
Ruby
121 lines
3.1 KiB
Ruby
# frozen_string_literal: true
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class Admin::ReportsController < Admin::StaffController
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REPORTS_LIMIT = 50
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def index
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reports_methods =
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["page_view_total_reqs"] +
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ApplicationRequest
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.req_types
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.keys
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.select { |r| r =~ /\Apage_view_/ && r !~ /mobile/ }
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.map { |r| r + "_reqs" } +
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Report.singleton_methods.grep(/\Areport_(?!about|storage_stats)/)
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reports =
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reports_methods.map do |name|
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type = name.to_s.gsub("report_", "")
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description = I18n.t("reports.#{type}.description", default: "")
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description_link = I18n.t("reports.#{type}.description_link", default: "")
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{
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type: type,
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title: I18n.t("reports.#{type}.title"),
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description: description.presence ? description : nil,
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description_link: description_link.presence ? description_link : nil,
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}
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end
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render_json_dump(reports: reports.sort_by { |report| report[:title] })
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end
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def bulk
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reports = []
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hijack do
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params[:reports].each do |report_type, report_params|
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args = parse_params(report_params)
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report = nil
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report = Report.find_cached(report_type, args) if (report_params[:cache])
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if report
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reports << report
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else
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report = Report.find(report_type, args)
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Report.cache(report) if (report_params[:cache]) && report
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if report.blank?
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report = Report._get(report_type, args)
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report.error = :not_found
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end
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reports << report
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end
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end
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render_json_dump(reports: reports)
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end
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end
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def show
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report_type = params[:type]
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raise Discourse::NotFound unless report_type =~ /\A[a-z0-9\_]+\z/
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args = parse_params(params)
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report = nil
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report = Report.find_cached(report_type, args) if (params[:cache])
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return render_json_dump(report: report) if report
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hijack do
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report = Report.find(report_type, args)
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raise Discourse::NotFound if report.blank?
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Report.cache(report) if (params[:cache])
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render_json_dump(report: report)
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end
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end
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private
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def parse_params(report_params)
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begin
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start_date =
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(
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if report_params[:start_date].present?
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Time.parse(report_params[:start_date]).to_date
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else
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1.days.ago
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end
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).beginning_of_day
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end_date =
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(
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if report_params[:end_date].present?
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Time.parse(report_params[:end_date]).to_date
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else
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start_date + 30.days
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end
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).end_of_day
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rescue ArgumentError => e
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raise Discourse::InvalidParameters.new(e.message)
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end
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facets = nil
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facets = report_params[:facets].map { |s| s.to_s.to_sym } if Array === report_params[:facets]
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limit = fetch_limit_from_params(params: report_params, default: nil, max: REPORTS_LIMIT)
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filters = nil
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filters = report_params[:filters] if report_params.has_key?(:filters)
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{ start_date: start_date, end_date: end_date, filters: filters, facets: facets, limit: limit }
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end
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end
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