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faraday.rb
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faraday.rb
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# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
module Elastic
module Transport
module Transport
module HTTP
# The default transport implementation, using the [_Faraday_](https://rubygems.org/gems/faraday)
# library for abstracting the HTTP client.
#
# @see Transport::Base
#
class Faraday
include Base
# Performs the request by invoking {Transport::Base#perform_request} with a block.
#
# @return [Response]
# @see Transport::Base#perform_request
#
def perform_request(method, path, params = {}, body = nil, headers = nil, opts = {})
super do |connection, url|
capture_otel_span_attributes(connection, url)
headers = parse_headers(headers, connection)
body = body ? __convert_to_json(body) : nil
body, headers = compress_request(body, headers)
response = connection.connection.run_request(method.downcase.to_sym, url, body, headers)
Response.new(response.status, decompress_response(response.body), response.headers)
end
end
# Merges headers already present in the connection and the ones passed in to perform_request
#
def parse_headers(headers, connection)
if connection.connection.headers
if !headers.nil?
connection.connection.headers.merge(headers)
else
connection.connection.headers
end
else
headers
end
end
# Builds and returns a connection
#
# @return [Connections::Connection]
#
def __build_connection(host, options={}, block=nil)
client = ::Faraday.new(__full_url(host), options, &block)
apply_headers(client, options)
Connections::Connection.new(host: host, connection: client)
end
# Returns an array of implementation specific connection errors.
#
# @return [Array]
#
def host_unreachable_exceptions
[
::Faraday::ConnectionFailed,
::Faraday::TimeoutError,
::Faraday.const_defined?(:ServerError) ? ::Faraday::ServerError : nil,
::Faraday::SSLError
].compact
end
private
def user_agent_header(client)
@user_agent ||= begin
meta = ["RUBY_VERSION: #{RUBY_VERSION}"]
if RbConfig::CONFIG && RbConfig::CONFIG['host_os']
meta << "#{RbConfig::CONFIG['host_os'].split('_').first[/[a-z]+/i].downcase} " \
"#{RbConfig::CONFIG['target_cpu']}"
end
meta << client.headers[USER_AGENT_STR]
"elastic-transport-ruby/#{VERSION} (#{meta.join('; ')})"
end
end
end
end
end
end
end