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Fix connect timeout not being enforced (#9329)

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* Fix connect timeout not being enforced

The loop was catching the timeout exception that should stop execution, so the next IP would no longer be within a timed block, which led to requests taking much longer than 10 seconds.

* Use timeout on each IP attempt, but limit to 2 attempts

* Fix code style issue

* Do not break Request#perform if no block given

* Update method stub in spec for Request

* Move timeout inside the begin/rescue block

* Use Resolv::DNS with timeout of 1 to get IP addresses

* Update Request spec to stub Resolv::DNS instead of Addrinfo

* Fix Resolve::DNS stubs in Request spec
This commit is contained in:
Eugen Rochko 2018-11-22 20:12:04 +01:00 • committed by GitHub
parent 824497fbce
commit fd8145d232
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 34 additions and 15 deletions
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32
app/lib/request.rb
View file

@ -2,6 +2,7 @@
require 'ipaddr'
require 'socket'
require 'resolv'
class Request
REQUEST_TARGET = '(request-target)'
@ -45,7 +46,7 @@ class Request
end
begin
yield response.extend(ClientLimit)
yield response.extend(ClientLimit) if block_given?
ensure
http_client.close
end
@ -94,7 +95,7 @@ class Request
end
def timeout
{ connect: 10, read: 10, write: 10 }
{ connect: nil, read: 10, write: 10 }
end
def http_client
@ -139,16 +140,29 @@ class Request
class Socket < TCPSocket
class << self
def open(host, *args)
return super host, *args if thru_hidden_service? host
return super(host, *args) if thru_hidden_service?(host)
outer_e = nil
Addrinfo.foreach(host, nil, nil, :SOCK_STREAM) do |address|
begin
raise Mastodon::HostValidationError if PrivateAddressCheck.private_address? IPAddr.new(address.ip_address)
return super address.ip_address, *args
rescue => e
outer_e = e
Resolv::DNS.open do |dns|
dns.timeouts = 1
addresses = dns.getaddresses(host).take(2)
time_slot = 10.0 / addresses.size
addresses.each do |address|
begin
raise Mastodon::HostValidationError if PrivateAddressCheck.private_address?(IPAddr.new(address.to_s))
::Timeout.timeout(time_slot, HTTP::TimeoutError) do
return super(address.to_s, *args)
end
rescue => e
outer_e = e
end
end
end
raise outer_e if outer_e
end

17
spec/lib/request_spec.rb
View file

@ -48,9 +48,11 @@ describe Request do
end
it 'executes a HTTP request when the first address is private' do
allow(Addrinfo).to receive(:foreach).with('example.com', nil, nil, :SOCK_STREAM)
.and_yield(Addrinfo.new(["AF_INET", 0, "example.com", "0.0.0.0"], :PF_INET, :SOCK_STREAM))
.and_yield(Addrinfo.new(["AF_INET6", 0, "example.com", "2001:4860:4860::8844"], :PF_INET6, :SOCK_STREAM))
resolver = double
allow(resolver).to receive(:getaddresses).with('example.com').and_return(%w(0.0.0.0 2001:4860:4860::8844))
allow(resolver).to receive(:timeouts=).and_return(nil)
allow(Resolv::DNS).to receive(:open).and_yield(resolver)
expect { |block| subject.perform &block }.to yield_control
expect(a_request(:get, 'http://example.com')).to have_been_made.once
@ -81,9 +83,12 @@ describe Request do
end
it 'raises Mastodon::ValidationError' do
allow(Addrinfo).to receive(:foreach).with('example.com', nil, nil, :SOCK_STREAM)
.and_yield(Addrinfo.new(["AF_INET", 0, "example.com", "0.0.0.0"], :PF_INET, :SOCK_STREAM))
.and_yield(Addrinfo.new(["AF_INET6", 0, "example.com", "2001:db8::face"], :PF_INET6, :SOCK_STREAM))
resolver = double
allow(resolver).to receive(:getaddresses).with('example.com').and_return(%w(0.0.0.0 2001:db8::face))
allow(resolver).to receive(:timeouts=).and_return(nil)
allow(Resolv::DNS).to receive(:open).and_yield(resolver)
expect { subject.perform }.to raise_error Mastodon::ValidationError
end
end