Change request timeout handling to use a longer deadline (#26055)

This commit is contained in:
Claire 2023-07-18 20:51:20 +02:00
parent 73b16b674d
commit aca0db4bd6

View file

@ -4,14 +4,22 @@ require 'ipaddr'
require 'socket'
require 'resolv'
# Monkey-patch the HTTP.rb timeout class to avoid using a timeout block
# Use our own timeout class to avoid using HTTP.rb's timeout block
# around the Socket#open method, since we use our own timeout blocks inside
# that method
#
# Also changes how the read timeout behaves so that it is cumulative (closer
# to HTTP::Timeout::Global, but still having distinct timeouts for other
# operation types)
class HTTP::Timeout::PerOperation
class PerOperationWithDeadline < HTTP::Timeout::PerOperation
READ_DEADLINE = 30
def initialize(*args)
super
@read_deadline = options.fetch(:read_deadline, READ_DEADLINE)
end
def connect(socket_class, host, port, nodelay = false)
@socket = socket_class.open(host, port)
@socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1) if nodelay
@ -24,7 +32,7 @@ class HTTP::Timeout::PerOperation
# Read data from the socket
def readpartial(size, buffer = nil)
@deadline ||= Process.clock_gettime(Process::CLOCK_MONOTONIC) + @read_timeout
@deadline ||= Process.clock_gettime(Process::CLOCK_MONOTONIC) + @read_deadline
timeout = false
loop do
@ -33,7 +41,8 @@ class HTTP::Timeout::PerOperation
return :eof if result.nil?
remaining_time = @deadline - Process.clock_gettime(Process::CLOCK_MONOTONIC)
raise HTTP::TimeoutError, "Read timed out after #{@read_timeout} seconds" if timeout || remaining_time <= 0
raise HTTP::TimeoutError, "Read timed out after #{@read_timeout} seconds" if timeout
raise HTTP::TimeoutError, "Read timed out after a total of #{@read_deadline} seconds" if remaining_time <= 0
return result if result != :wait_readable
# marking the socket for timeout. Why is this not being raised immediately?
@ -46,7 +55,7 @@ class HTTP::Timeout::PerOperation
# timeout. Else, the first timeout was a proper timeout.
# This hack has to be done because io/wait#wait_readable doesn't provide a value for when
# the socket is closed by the server, and HTTP::Parser doesn't provide the limit for the chunks.
timeout = true unless @socket.to_io.wait_readable(remaining_time)
timeout = true unless @socket.to_io.wait_readable([remaining_time, @read_timeout].min)
end
end
end
@ -57,7 +66,7 @@ class Request
# We enforce a 5s timeout on DNS resolving, 5s timeout on socket opening
# and 5s timeout on the TLS handshake, meaning the worst case should take
# about 15s in total
TIMEOUT = { connect: 5, read: 10, write: 10 }.freeze
TIMEOUT = { connect_timeout: 5, read_timeout: 10, write_timeout: 10, read_deadline: 30 }.freeze
include RoutingHelper
@ -68,6 +77,7 @@ class Request
@url = Addressable::URI.parse(url).normalize
@http_client = options.delete(:http_client)
@options = options.merge(socket_class: use_proxy? ? ProxySocket : Socket)
@options = @options.merge(timeout_class: PerOperationWithDeadline, timeout_options: TIMEOUT)
@options = @options.merge(proxy_url) if use_proxy?
@headers = {}
@ -128,7 +138,7 @@ class Request
end
def http_client
HTTP.use(:auto_inflate).timeout(TIMEOUT.dup).follow(max_hops: 3)
HTTP.use(:auto_inflate).follow(max_hops: 3)
end
end