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142571bba0
* `rescue nil` is a really bad pattern to use in our code base. We should rescue errors that we expect the code to throw and not rescue everything because we're unsure of what errors the code would throw. This would reduce the amount of pain we face when debugging why something isn't working as expexted. I've been bitten countless of times by errors being swallowed as a result during debugging sessions.
120 lines
3.7 KiB
Ruby
120 lines
3.7 KiB
Ruby
class EmbedController < ApplicationController
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skip_before_action :check_xhr, :preload_json, :verify_authenticity_token
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before_action :ensure_embeddable, except: [ :info ]
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before_action :get_embeddable_css_class, except: [ :info ]
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before_action :ensure_api_request, only: [ :info ]
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layout 'embed'
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rescue_from Discourse::InvalidAccess do
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response.headers['X-Frame-Options'] = "ALLOWALL"
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if current_user.try(:admin?)
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@setup_url = "#{Discourse.base_url}/admin/customize/embedding"
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@show_reason = true
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@hosts = EmbeddableHost.all
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end
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render 'embed_error'
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end
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def comments
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embed_url = params[:embed_url]
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embed_username = params[:discourse_username]
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topic_id = nil
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if embed_url.present?
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topic_id = TopicEmbed.topic_id_for_embed(embed_url)
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else
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topic_id = params[:topic_id].to_i
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end
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if topic_id
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@topic_view = TopicView.new(topic_id,
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current_user,
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limit: SiteSetting.embed_post_limit,
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exclude_first: true,
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exclude_deleted_users: true,
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exclude_hidden: true)
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@second_post_url = "#{@topic_view.topic.url}/2" if @topic_view
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@posts_left = 0
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if @topic_view && @topic_view.posts.size == SiteSetting.embed_post_limit
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@posts_left = @topic_view.topic.posts_count - SiteSetting.embed_post_limit - 1
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end
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if @topic_view
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@reply_count = @topic_view.topic.posts_count - 1
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@reply_count = 0 if @reply_count < 0
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end
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elsif embed_url.present?
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Jobs.enqueue(:retrieve_topic,
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user_id: current_user.try(:id),
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embed_url: embed_url,
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author_username: embed_username,
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referer: request.env['HTTP_REFERER']
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)
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render 'loading'
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end
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discourse_expires_in 1.minute
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end
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def info
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embed_url = params.require(:embed_url)
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@topic_embed = TopicEmbed.where(embed_url: embed_url).first
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raise Discourse::NotFound if @topic_embed.nil?
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render_serialized(@topic_embed, TopicEmbedSerializer, root: false)
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end
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def count
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embed_urls = params[:embed_url]
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by_url = {}
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if embed_urls.present?
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urls = embed_urls.map { |u| u.sub(/#discourse-comments$/, '').sub(/\/$/, '') }
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topic_embeds = TopicEmbed.where(embed_url: urls).includes(:topic).references(:topic)
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topic_embeds.each do |te|
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url = te.embed_url
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url = "#{url}#discourse-comments" unless params[:embed_url].include?(url)
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if te.topic.present?
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by_url[url] = I18n.t('embed.replies', count: te.topic.posts_count - 1)
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else
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by_url[url] = I18n.t('embed.replies', count: 0)
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end
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end
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end
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render json: { counts: by_url }, callback: params[:callback]
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end
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private
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def get_embeddable_css_class
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@embeddable_css_class = ""
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embeddable_host = EmbeddableHost.record_for_url(request.referer)
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@embeddable_css_class = " class=\"#{embeddable_host.class_name}\"" if embeddable_host.present? && embeddable_host.class_name.present?
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end
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def ensure_api_request
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raise Discourse::InvalidAccess.new('api key not set') if !is_api?
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end
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def ensure_embeddable
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if !(Rails.env.development? && current_user&.admin?)
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referer = request.referer
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unless referer && EmbeddableHost.url_allowed?(referer)
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raise Discourse::InvalidAccess.new('invalid referer host')
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end
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end
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response.headers['X-Frame-Options'] = "ALLOWALL"
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rescue URI::InvalidURIError
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raise Discourse::InvalidAccess.new('invalid referer host')
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end
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end
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