mastodon/lib/paperclip/response_with_limit_adapter.rb

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# frozen_string_literal: true
module Paperclip
class ResponseWithLimitAdapter < AbstractAdapter
def self.register
Paperclip.io_adapters.register self do |target|
target.is_a?(ResponseWithLimit)
end
end
def initialize(target, options = {})
super
cache_current_values
end
private
def cache_current_values
@target.response.require_limit_not_exceeded!(@target.limit)
@original_filename = truncated_filename
@tempfile = copy_to_tempfile(@target)
@content_type = ContentTypeDetector.new(@tempfile.path).detect
@size = File.size(@tempfile)
end
def copy_to_tempfile(source)
bytes_read = 0
source.response.body.each do |chunk|
bytes_read += chunk.bytesize
raise Mastodon::LengthValidationError, "Body size exceeds limit of #{source.limit}" if bytes_read > source.limit
destination.write(chunk)
chunk.clear
end
destination.rewind
destination
rescue
destination.close(true)
raise
ensure
source.response.connection.close
end
def truncated_filename
filename = filename_from_content_disposition.presence || filename_from_path.presence || 'data'
extension = File.extname(filename)
basename = File.basename(filename, extension)
[basename[...20], extension[..4]].compact_blank.join
end
def filename_from_content_disposition
disposition = @target.response.headers['content-disposition']
disposition&.match(/filename="([^"]*)"/)&.captures&.first
end
def filename_from_path
@target.response.uri.path.split('/').last
end
end
end