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events.rb
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events.rb
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# frozen_string_literal: true
require "puma/null_io"
require 'puma/error_logger'
require 'stringio'
module Puma
# The default implement of an event sink object used by Server
# for when certain kinds of events occur in the life of the server.
#
# The methods available are the events that the Server fires.
#
class Events
class DefaultFormatter
def call(str)
str
end
end
class PidFormatter
def call(str)
"[#{$$}] #{str}"
end
end
# Create an Events object that prints to +stdout+ and +stderr+.
#
def initialize(stdout, stderr)
@formatter = DefaultFormatter.new
@stdout = stdout
@stderr = stderr
@debug = ENV.key? 'PUMA_DEBUG'
@error_logger = ErrorLogger.new(@stderr)
@hooks = Hash.new { |h,k| h[k] = [] }
end
attr_reader :stdout, :stderr
attr_accessor :formatter
# Fire callbacks for the named hook
#
def fire(hook, *args)
@hooks[hook].each { |t| t.call(*args) }
end
# Register a callback for a given hook
#
def register(hook, obj=nil, &blk)
if obj and blk
raise "Specify either an object or a block, not both"
end
h = obj || blk
@hooks[hook] << h
h
end
# Write +str+ to +@stdout+
#
def log(str)
@stdout.puts format(str) if @stdout.respond_to? :puts
@stdout.flush unless @stdout.sync
rescue Errno::EPIPE
end
def write(str)
@stdout.write format(str)
end
def debug(str)
log("% #{str}") if @debug
end
# Write +str+ to +@stderr+
#
def error(str)
@error_logger.info(text: format("ERROR: #{str}"))
exit 1
end
def format(str)
formatter.call(str)
end
# An HTTP connection error has occurred.
# +error+ a connection exception, +req+ the request,
# and +text+ additional info
# @version 5.0.0
#
def connection_error(error, req, text="HTTP connection error")
@error_logger.info(error: error, req: req, text: text)
end
# An HTTP parse error has occurred.
# +error+ a parsing exception,
# and +req+ the request.
#
def parse_error(error, req)
@error_logger.info(error: error, req: req, text: 'HTTP parse error, malformed request')
end
# An SSL error has occurred.
# @param error <Puma::MiniSSL::SSLError>
# @param ssl_socket <Puma::MiniSSL::Socket>
#
def ssl_error(error, ssl_socket)
peeraddr = ssl_socket.peeraddr.last rescue "<unknown>"
peercert = ssl_socket.peercert
subject = peercert ? peercert.subject : nil
@error_logger.info(error: error, text: "SSL error, peer: #{peeraddr}, peer cert: #{subject}")
end
# An unknown error has occurred.
# +error+ an exception object, +req+ the request,
# and +text+ additional info
#
def unknown_error(error, req=nil, text="Unknown error")
@error_logger.info(error: error, req: req, text: text)
end
# Log occurred error debug dump.
# +error+ an exception object, +req+ the request,
# and +text+ additional info
# @version 5.0.0
#
def debug_error(error, req=nil, text="")
@error_logger.debug(error: error, req: req, text: text)
end
def on_booted(&block)
register(:on_booted, &block)
end
def on_restart(&block)
register(:on_restart, &block)
end
def on_stopped(&block)
register(:on_stopped, &block)
end
def fire_on_booted!
fire(:on_booted)
end
def fire_on_restart!
fire(:on_restart)
end
def fire_on_stopped!
fire(:on_stopped)
end
DEFAULT = new(STDOUT, STDERR)
# Returns an Events object which writes its status to 2 StringIO
# objects.
#
def self.strings
Events.new StringIO.new, StringIO.new
end
def self.stdio
Events.new $stdout, $stderr
end
def self.null
n = NullIO.new
Events.new n, n
end
end
end