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# frozen_string_literal: true
module Rack
module Multipart
class << self
module MultipartPatch
def extract_multipart(req, params = Rack::Utils.default_query_parser)
log_multipart_warning(req) if log_large_multipart?
super
end
def log_multipart_warning(req)
content_length = req.content_length.to_i
return unless content_length > log_threshold
message = {
message: "Large multipart body detected",
path: req.path,
content_length: content_length,
correlation_id: ::Labkit::Context.correlation_id
}
log_warn(message)
end
def log_warn(message)
warn message.to_json
end
def log_large_multipart?
Gitlab::Utils.to_boolean(ENV['ENABLE_RACK_MULTIPART_LOGGING'], default: true) && Gitlab.com?
end
def log_threshold
ENV.fetch('RACK_MULTIPART_LOGGING_BYTES', 100_000_000).to_i
end
end
prepend MultipartPatch
end
end
end
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