260 lines
8.0 KiB
Ruby
260 lines
8.0 KiB
Ruby
# frozen_string_literal: true
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require "mini_mime"
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class UploadsController < ApplicationController
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requires_login except: [:show, :show_short, :show_secure]
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skip_before_action :preload_json, :check_xhr, :redirect_to_login_if_required, only: [:show, :show_short, :show_secure]
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protect_from_forgery except: :show
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before_action :is_asset_path, only: [:show, :show_short, :show_secure]
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def create
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# capture current user for block later on
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me = current_user
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# 50 characters ought to be enough for the upload type
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type = params.require(:type).parameterize(separator: "_")[0..50]
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if type == "avatar" && !me.admin? && (SiteSetting.sso_overrides_avatar || !SiteSetting.allow_uploaded_avatars)
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return render json: failed_json, status: 422
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end
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url = params[:url]
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file = params[:file] || params[:files]&.first
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pasted = params[:pasted] == "true"
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for_private_message = params[:for_private_message] == "true"
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for_site_setting = params[:for_site_setting] == "true"
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is_api = is_api?
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retain_hours = params[:retain_hours].to_i
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# note, atm hijack is processed in its own context and has not access to controller
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# longer term we may change this
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hijack do
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begin
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info = UploadsController.create_upload(
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current_user: me,
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file: file,
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url: url,
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type: type,
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for_private_message: for_private_message,
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for_site_setting: for_site_setting,
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pasted: pasted,
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is_api: is_api,
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retain_hours: retain_hours
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)
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rescue => e
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render json: failed_json.merge(message: e.message&.split("\n")&.first), status: 422
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else
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render json: UploadsController.serialize_upload(info), status: Upload === info ? 200 : 422
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end
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end
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end
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def lookup_urls
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params.permit(short_urls: [])
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uploads = []
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if (params[:short_urls] && params[:short_urls].length > 0)
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PrettyText::Helpers.lookup_upload_urls(params[:short_urls]).each do |short_url, paths|
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uploads << {
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short_url: short_url,
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url: paths[:url],
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short_path: paths[:short_path]
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}
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end
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end
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render json: uploads.to_json
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end
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def show
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# do not serve uploads requested via XHR to prevent XSS
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return xhr_not_allowed if request.xhr?
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return render_404 if !RailsMultisite::ConnectionManagement.has_db?(params[:site])
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RailsMultisite::ConnectionManagement.with_connection(params[:site]) do |db|
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return render_404 if SiteSetting.prevent_anons_from_downloading_files && current_user.nil?
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if upload = Upload.find_by(sha1: params[:sha]) || Upload.find_by(id: params[:id], url: request.env["PATH_INFO"])
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unless Discourse.store.internal?
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local_store = FileStore::LocalStore.new
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return render_404 unless local_store.has_been_uploaded?(upload.url)
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end
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send_file_local_upload(upload)
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else
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render_404
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end
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end
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end
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def show_short
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# do not serve uploads requested via XHR to prevent XSS
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return xhr_not_allowed if request.xhr?
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if SiteSetting.prevent_anons_from_downloading_files && current_user.nil?
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return render_404
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end
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sha1 = Upload.sha1_from_base62_encoded(params[:base62])
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if upload = Upload.find_by(sha1: sha1)
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if upload.secure? && SiteSetting.secure_media?
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return handle_secure_upload_request(upload)
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end
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if Discourse.store.internal?
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send_file_local_upload(upload)
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else
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redirect_to Discourse.store.url_for(upload, force_download: params[:dl] == "1")
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end
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else
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render_404
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end
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end
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def show_secure
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# do not serve uploads requested via XHR to prevent XSS
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return xhr_not_allowed if request.xhr?
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return render_404 if !Discourse.store.external?
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path_with_ext = "#{params[:path]}.#{params[:extension]}"
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sha1 = File.basename(path_with_ext, File.extname(path_with_ext))
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# this takes care of optimized image requests
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sha1 = sha1.partition("_").first if sha1.include?("_")
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upload = Upload.find_by(sha1: sha1)
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return render_404 if upload.blank?
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return render_404 if SiteSetting.prevent_anons_from_downloading_files && current_user.nil?
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return handle_secure_upload_request(upload, path_with_ext) if SiteSetting.secure_media?
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# we don't want to 404 here if secure media gets disabled
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# because all posts with secure uploads will show broken media
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# until rebaked, which could take some time
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#
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# if the upload is still secure, that means the ACL is probably still
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# private, so we don't want to go to the CDN url just yet otherwise we
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# will get a 403. if the upload is not secure we assume the ACL is public
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signed_secure_url = Discourse.store.signed_url_for_path(path_with_ext)
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redirect_to upload.secure? ? signed_secure_url : Discourse.store.cdn_url(upload.url)
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end
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def handle_secure_upload_request(upload, path_with_ext = nil)
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if upload.access_control_post_id.present?
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raise Discourse::InvalidAccess if !guardian.can_see?(upload.access_control_post)
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else
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return render_404 if current_user.nil?
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end
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# url_for figures out the full URL, handling multisite DBs,
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# and will return a presigned URL for the upload
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if path_with_ext.blank?
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return redirect_to Discourse.store.url_for(upload)
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end
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redirect_to Discourse.store.signed_url_for_path(path_with_ext)
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end
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def metadata
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params.require(:url)
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upload = Upload.get_from_url(params[:url])
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raise Discourse::NotFound unless upload
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render json: {
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original_filename: upload.original_filename,
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width: upload.width,
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height: upload.height,
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human_filesize: upload.human_filesize
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}
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end
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protected
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def xhr_not_allowed
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raise Discourse::InvalidParameters.new("XHR not allowed")
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end
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def render_404
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raise Discourse::NotFound
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end
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def self.serialize_upload(data)
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# as_json.as_json is not a typo... as_json in AM serializer returns keys as symbols, we need them
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# as strings here
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serialized = UploadSerializer.new(data, root: nil).as_json.as_json if Upload === data
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serialized ||= (data || {}).as_json
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end
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def self.create_upload(current_user:,
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file:,
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url:,
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type:,
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for_private_message:,
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for_site_setting:,
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pasted:,
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is_api:,
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retain_hours:)
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if file.nil?
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if url.present? && is_api
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maximum_upload_size = [SiteSetting.max_image_size_kb, SiteSetting.max_attachment_size_kb].max.kilobytes
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tempfile = FileHelper.download(
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url,
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follow_redirect: true,
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max_file_size: maximum_upload_size,
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tmp_file_name: "discourse-upload-#{type}"
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) rescue nil
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filename = File.basename(URI.parse(url).path)
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end
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else
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tempfile = file.tempfile
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filename = file.original_filename
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end
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return { errors: [I18n.t("upload.file_missing")] } if tempfile.nil?
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opts = {
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type: type,
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for_private_message: for_private_message,
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for_site_setting: for_site_setting,
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pasted: pasted,
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}
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upload = UploadCreator.new(tempfile, filename, opts).create_for(current_user.id)
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if upload.errors.empty? && current_user.admin?
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upload.update_columns(retain_hours: retain_hours) if retain_hours > 0
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end
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upload.errors.empty? ? upload : { errors: upload.errors.to_hash.values.flatten }
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ensure
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tempfile&.close!
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end
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private
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def send_file_local_upload(upload)
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opts = {
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filename: upload.original_filename,
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content_type: MiniMime.lookup_by_filename(upload.original_filename)&.content_type
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}
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if !FileHelper.is_supported_image?(upload.original_filename)
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opts[:disposition] = "attachment"
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elsif params[:inline]
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opts[:disposition] = "inline"
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end
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file_path = Discourse.store.path_for(upload)
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return render_404 unless file_path
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send_file(file_path, opts)
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end
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end
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