61 lines
1.4 KiB
Ruby
61 lines
1.4 KiB
Ruby
require "final_destination"
|
|
require "mini_mime"
|
|
require "open-uri"
|
|
|
|
class FileHelper
|
|
|
|
def self.is_image?(filename)
|
|
filename =~ images_regexp
|
|
end
|
|
|
|
def self.download(url,
|
|
max_file_size:,
|
|
tmp_file_name:,
|
|
follow_redirect: false,
|
|
read_timeout: 5,
|
|
skip_rate_limit: false)
|
|
|
|
url = "https:" + url if url.start_with?("//")
|
|
raise Discourse::InvalidParameters.new(:url) unless url =~ /^https?:\/\//
|
|
|
|
uri = FinalDestination.new(
|
|
url,
|
|
max_redirects: follow_redirect ? 5 : 1,
|
|
skip_rate_limit: skip_rate_limit
|
|
).resolve
|
|
return unless uri.present?
|
|
|
|
downloaded = uri.open("rb", read_timeout: read_timeout)
|
|
|
|
extension = File.extname(uri.path)
|
|
|
|
if extension.blank? && downloaded.content_type.present?
|
|
ext = MiniMime.lookup_by_content_type(downloaded.content_type)&.extension
|
|
extension = "." + ext if ext.present?
|
|
end
|
|
|
|
tmp = Tempfile.new([tmp_file_name, extension])
|
|
|
|
File.open(tmp.path, "wb") do |f|
|
|
while f.size <= max_file_size && data = downloaded.read(512.kilobytes)
|
|
f.write(data)
|
|
end
|
|
end
|
|
|
|
tmp
|
|
ensure
|
|
downloaded&.close! rescue nil
|
|
end
|
|
|
|
private
|
|
|
|
def self.images
|
|
@@images ||= Set.new %w{jpg jpeg png gif tif tiff bmp svg webp ico}
|
|
end
|
|
|
|
def self.images_regexp
|
|
@@images_regexp ||= /\.(#{images.to_a.join("|")})$/i
|
|
end
|
|
|
|
end
|