From fd8145d2322d8b13b6aaa9cd2a61331ff660c9dd Mon Sep 17 00:00:00 2001 From: Eugen Rochko Date: Thu, 22 Nov 2018 20:12:04 +0100 Subject: [PATCH] Fix connect timeout not being enforced (#9329) * 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 --- app/lib/request.rb | 32 +++++++++++++++++++++++--------- spec/lib/request_spec.rb | 17 +++++++++++------ 2 files changed, 34 insertions(+), 15 deletions(-) diff --git a/app/lib/request.rb b/app/lib/request.rb index fdaaf363699..bb6ef4661a4 100644 --- a/app/lib/request.rb +++ b/app/lib/request.rb @@ -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 diff --git a/spec/lib/request_spec.rb b/spec/lib/request_spec.rb index 8cc5d90ce31..2d300f18d6c 100644 --- a/spec/lib/request_spec.rb +++ b/spec/lib/request_spec.rb @@ -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