Sha256: a5a51201d952e00a4fa7217701083d188ffe0b456d9eee23f7d87bfc9e5117f5
Contents?: true
Size: 1.54 KB
Versions: 6
Compression:
Stored size: 1.54 KB
Contents
# frozen_string_literal: true
# Copyright The OpenTelemetry Authors
#
# SPDX-License-Identifier: Apache-2.0
module OpenTelemetry
class Context
module Propagation
# @deprecated Use the rack env getter found in the
# opentelemetry-common gem instead.
# The RackEnvGetter class provides a common methods for reading
# keys from a rack environment. It abstracts away the rack-normalization
# process so that keys can be looked up without having to transform them
# first. With this class you can get +traceparent+ instead of
# +HTTP_TRACEPARENT+
class RackEnvGetter
# Converts key into a rack-normalized key and reads it from the carrier.
# Useful for extract operations.
def get(carrier, key)
carrier[to_rack_key(key)] || carrier[key]
end
# Reads all keys from a carrier and converts them from the rack-normalized
# form to the original. The resulting keys will be lowercase and
# underscores will be replaced with dashes.
def keys(carrier)
carrier.keys.map(&method(:from_rack_key))
end
private
def to_rack_key(key)
# Use + for mutable string interpolation in pre-Ruby 3.0.
ret = +"HTTP_#{key}"
ret.tr!('-', '_')
ret.upcase!
ret
end
def from_rack_key(key)
start = key.start_with?('HTTP_') ? 5 : 0
ret = key[start..]
ret.tr!('_', '-')
ret.downcase!
ret
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems