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# frozen_string_literal: true
# This class takes in input a Ci::Build object and an artifact path to read.
# It downloads and extracts the artifacts archive, then returns the content
# of the artifact, if found.
module Gitlab
module Ci
class ArtifactFileReader
Error = Class.new(StandardError)
MAX_ARCHIVE_SIZE = 5.megabytes
def initialize(job)
@job = job
raise ArgumentError, 'Job does not have artifacts' unless @job.artifacts?
validate!
end
def read(path)
return unless job.artifacts_metadata
metadata_entry = job.artifacts_metadata_entry(path)
if metadata_entry.total_size > MAX_ARCHIVE_SIZE
raise Error, "Artifacts archive for job `#{job.name}` is too large: max #{max_archive_size_in_mb}"
end
read_zip_file!(path)
end
private
attr_reader :job
def validate!
if job.job_artifacts_archive.size > MAX_ARCHIVE_SIZE
raise Error, "Artifacts archive for job `#{job.name}` is too large: max #{max_archive_size_in_mb}"
end
unless job.artifacts_metadata?
raise Error, "Job `#{job.name}` has missing artifacts metadata and cannot be extracted!"
end
end
def read_zip_file!(file_path)
job.artifacts_file.use_open_file do |file|
zip_file = Zip::File.new(file, false, true)
entry = zip_file.find_entry(file_path)
unless entry
raise Error, "Path `#{file_path}` does not exist inside the `#{job.name}` artifacts archive!"
end
if entry.name_is_directory?
raise Error, "Path `#{file_path}` was expected to be a file but it was a directory!"
end
zip_file.read(entry)
end
end
def max_archive_size_in_mb
ActiveSupport::NumberHelper.number_to_human_size(MAX_ARCHIVE_SIZE)
end
end
end
end
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