discourse/lib/onebox/matcher.rb
jbrw 2f28ba318c
FEATURE: Onebox can match engines based on the content_type (#13876)
* FEATURE: Onebox can match engines based on the content_type

`FinalDestination` now returns the `content_type` of a resolved URL.

`Oneboxer` passes this value to `Onebox` itself. Onebox engines can now specify a `matches_content_type` regex of content_types that the engine can handle, regardless of the URL.

`ImageOnebox` will match URLs with a content type of `image/png`, `jpg`, `gif`, `bmp`, `tif`, etc.

This will allow images that exist at a URL without a file type extension to be correctly rendered, assuming a valid `content_type` is returned.
2021-07-30 13:36:30 -04:00

39 lines
1.0 KiB
Ruby

# frozen_string_literal: true
module Onebox
class Matcher
def initialize(url, options = {})
begin
@uri = URI(url)
rescue URI::InvalidURIError
end
@options = options
end
def ordered_engines
@ordered_engines ||= Engine.engines.sort_by do |e|
e.respond_to?(:priority) ? e.priority : 100
end
end
def oneboxed
return if @uri.nil?
return if @uri.port && !Onebox.options.allowed_ports.include?(@uri.port)
return if @uri.scheme && !Onebox.options.allowed_schemes.include?(@uri.scheme)
ordered_engines.find do |engine|
(
engine.respond_to?(:handles_content_type?) && engine.handles_content_type?(@options[:content_type]) ||
engine === @uri
) && has_allowed_iframe_origins?(engine)
end
end
def has_allowed_iframe_origins?(engine)
allowed_regexes = @options[:allowed_iframe_regexes] || []
engine.iframe_origins.all? { |o| allowed_regexes.any? { |r| o =~ r } }
end
end
end