2024-11-18 17:22:39 -05:00
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# frozen_string_literal: true
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module DiscourseAi
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module AiBot
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class ArtifactsController < ApplicationController
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requires_plugin DiscourseAi::PLUGIN_NAME
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before_action :require_site_settings!
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skip_before_action :preload_json, :check_xhr, only: %i[show]
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def show
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artifact = AiArtifact.find(params[:id])
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post = Post.find_by(id: artifact.post_id)
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if artifact.metadata&.dig("public")
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# no guardian needed
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else
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raise Discourse::NotFound if !post&.topic&.private_message?
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raise Discourse::NotFound if !guardian.can_see?(post)
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end
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2024-12-02 15:23:31 -05:00
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name = artifact.name
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if params[:version].present?
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artifact = artifact.versions.find_by(version_number: params[:version])
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raise Discourse::NotFound if !artifact
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end
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js = artifact.js || ""
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if !js.match?(%r{\A\s*<script.*</script>}mi)
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mod = ""
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mod = " type=\"module\"" if js.match?(/\A\s*import.*/)
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js = "<script#{mod}>\n#{js}\n</script>"
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end
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2024-11-19 06:44:17 -05:00
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# Prepare the inner (untrusted) HTML document
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untrusted_html = <<~HTML
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2024-11-18 17:22:39 -05:00
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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2024-12-02 15:23:31 -05:00
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<title>#{ERB::Util.html_escape(name)}</title>
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2024-11-18 17:22:39 -05:00
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<style>
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#{artifact.css}
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</style>
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</head>
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<body>
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#{artifact.html}
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2024-12-02 15:23:31 -05:00
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#{js}
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2024-11-18 17:22:39 -05:00
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</body>
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</html>
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HTML
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2024-11-19 06:44:17 -05:00
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# Prepare the outer (trusted) HTML document
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trusted_html = <<~HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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2024-12-02 15:23:31 -05:00
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<title>#{ERB::Util.html_escape(name)}</title>
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2024-11-19 06:44:17 -05:00
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<style>
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html, body, iframe {
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margin: 0;
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padding: 0;
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width: 100%;
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height: 100%;
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2024-11-19 21:13:03 -05:00
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border: 0;
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overflow: hidden;
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}
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iframe {
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overflow: auto;
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2024-11-19 06:44:17 -05:00
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}
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</style>
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</head>
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<body>
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<iframe sandbox="allow-scripts allow-forms" height="100%" width="100%" srcdoc="#{ERB::Util.html_escape(untrusted_html)}" frameborder="0"></iframe>
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</body>
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</html>
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HTML
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2024-11-18 17:22:39 -05:00
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response.headers.delete("X-Frame-Options")
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2024-12-02 15:23:31 -05:00
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response.headers[
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"Content-Security-Policy"
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] = "script-src 'self' 'unsafe-inline' 'wasm-unsafe-eval' https://unpkg.com https://cdnjs.cloudflare.com https://ajax.googleapis.com https://cdn.jsdelivr.net;"
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2024-11-20 02:53:19 -05:00
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response.headers["X-Robots-Tag"] = "noindex"
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2024-11-18 17:22:39 -05:00
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# Render the content
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2024-11-19 06:44:17 -05:00
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render html: trusted_html.html_safe, layout: false, content_type: "text/html"
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2024-11-18 17:22:39 -05:00
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end
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private
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def require_site_settings!
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if !SiteSetting.discourse_ai_enabled ||
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!SiteSetting.ai_artifact_security.in?(%w[lax strict])
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raise Discourse::NotFound
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end
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end
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end
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end
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end
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