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mastodon/lib/paperclip/response_with_limit_adapter.rb
Claire 48f8658d34
Fix upload of remote media with OpenStack Swift sometimes failing ()
Under certain conditions, files fetched from remotes trigger an error when
being uploaded using OpenStack Swift. This is because in some cases, the
remote server will not return a content-length, so our ResponseWithLimitAdapter
will hold a `nil` value for `#size`, which will lead to an invalid value
for the Content-Length header of the Swift API call.

This commit fixes that by taking the size from the actually-downloaded file
size rather than the upstream-provided Content-Length header value.
2021-11-16 21:36:28 +01:00

56 lines
1.3 KiB
Ruby

# 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
@original_filename = filename_from_content_disposition.presence || filename_from_path.presence || 'data'
@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
destination.write(chunk)
chunk.clear
raise Mastodon::LengthValidationError if bytes_read > source.limit
end
destination.rewind
destination
rescue Mastodon::LengthValidationError
destination.close(true)
raise
ensure
source.response.connection.close
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