[ruby-core:114912] [Ruby master Misc#19899] Ruby3.3.0-preview2: Behaviour changes of Socket.recv when the sever closes the connection

Issue #19899 has been updated by alanwu (Alan Wu).



Status changed from Open to Closed



NEWS entry added in commit:2e4e4c82c28. Thanks for the report!



----------------------------------------

Misc #19899: Ruby3.3.0-preview2: Behaviour changes of Socket.recv when the =
sever closes the connection

https://bugs.ruby-lang.org/issues/19899#change-104781



* Author: jbeschi (jacopo beschi)

* Status: Closed

* Priority: Normal

----------------------------------------

I noticed that `Socket#recv` now returns `nil` instead of `""` when the ser=
ver closes the connection, is it expected? If yes, I suggest mentioning it =
to the [release page](https://www.ruby-lang.org/en/news/2023/09/14/ruby-3-3=
-0-preview2-released/).=20



Example:





``` ruby

# server.rb

require "socket"



port =3D 3030

server =3D TCPServer.new("", port)



while(conn =3D server.accept) #serves forever

  conn.print "hello"

  conn.close

end



#=A0client.rb

require 'socket'



port =3D 3030

socket =3D TCPSocket.new("localhost", port)



2.times do

  res =3D socket.recv(1012)

  puts "received:"

  p res

end

socket.close

```





```

jacopo-37s-mb 3.2.0 ~ ruby client.rb

received:

"hello"

received:

""

jacopo-37s-mb 3.2.0 ~ rbenv local 3.3.0-preview2

jacopo-37s-mb 3.3.0-preview2 ~ ruby client.rb

received:

"hello"

received:

nil

```



Thanks!







--=20

https://bugs.ruby-lang.org/

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