discourse/app/services/uri_adapter.rb

65 lines
1.5 KiB
Ruby

# For converting urls to files
class UriAdapter
attr_reader :target, :content, :tempfile, :original_filename
def initialize(target)
raise Discourse::InvalidParameters unless target =~ /^https?:\/\//
@target = URI(target)
@original_filename = ::File.basename(@target.path)
@content = download_content
@tempfile = TempfileFactory.new.generate(@original_filename)
end
def download_content
open(target)
end
def copy_to_tempfile(src)
while data = src.read(16.kilobytes)
tempfile.write(data)
end
src.close
tempfile.rewind
tempfile
end
def file_size
content.size
end
def build_uploaded_file
return if SiteSetting.max_image_size_kb.kilobytes < file_size
copy_to_tempfile(content)
content_type = content.content_type if content.respond_to?(:content_type)
content_type ||= "text/html"
ActionDispatch::Http::UploadedFile.new( tempfile: tempfile,
filename: original_filename,
type: content_type
)
end
end
# From https://github.com/thoughtbot/paperclip/blob/master/lib/paperclip/tempfile_factory.rb
class TempfileFactory
ILLEGAL_FILENAME_CHARACTERS = /^~/
def generate(name)
@name = name
file = Tempfile.new([basename, extension])
file.binmode
file
end
def extension
File.extname(@name)
end
def basename
File.basename(@name, extension).gsub(ILLEGAL_FILENAME_CHARACTERS, '_')
end
end