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# frozen_string_literal: true
#
# Copyright, 2018, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require 'protocol/http/body/wrapper'
require 'async/clock'
module Async
module HTTP
class Statistics
def self.start
self.new(Clock.now)
end
def initialize(start_time)
@start_time = start_time
end
def wrap(response, &block)
if response and response.body
response.body = Body::Statistics.new(@start_time, response.body, block)
end
return response
end
end
module Body
# Invokes a callback once the body has finished reading.
class Statistics < ::Protocol::HTTP::Body::Wrapper
def initialize(start_time, body, callback)
super(body)
@sent = 0
@start_time = start_time
@first_chunk_time = nil
@end_time = nil
@callback = callback
end
attr :start_time
attr :first_chunk_time
attr :end_time
attr :sent
def total_duration
if @end_time
@end_time - @start_time
end
end
def first_chunk_duration
if @first_chunk_time
@first_chunk_time - @start_time
end
end
def close(error = nil)
complete_statistics(error)
super
end
def read
chunk = super
@first_chunk_time ||= Clock.now
if chunk
@sent += chunk.bytesize
end
return chunk
end
def to_s
parts = ["sent #{@sent} bytes"]
if duration = self.total_duration
parts << "took #{format_duration(duration)} in total"
end
if duration = self.first_chunk_duration
parts << "took #{format_duration(duration)} until first chunk"
end
return parts.join('; ')
end
def inspect
"#{super} | \#<#{self.class} #{self.to_s}>"
end
private
def complete_statistics(error = nil)
@end_time = Clock.now
@callback.call(self, error) if @callback
end
def format_duration(seconds)
if seconds < 1.0
return "#{(seconds * 1000.0).round(2)}ms"
else
return "#{seconds.round(1)}s"
end
end
end
end
end
end
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