[ruby-core:112630] [Ruby master Bug#19468] Ruby 3.2: net/http sets UTF-8 encoding for binary responses

Issue #19468 has been reported by romuloceccon (R=F4mulo Ceccon).



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

Bug #19468: Ruby 3.2: net/http sets UTF-8 encoding for binary responses

https://bugs.ruby-lang.org/issues/19468



* Author: romuloceccon (R=F4mulo Ceccon)

* Status: Open

* Priority: Normal

* ruby -v: ruby 3.2.1 (2023-02-22 revision 65ab2c1ef2) [x86_64-linux]

* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

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

net/http on Ruby 3.2 has changed the encoding of binary responses from SSL =
connected hosts (non-SSL connections are not affected):



``` ruby

# req.rb

require 'openssl'

require 'net/http'

puts "openssl ext: #{OpenSSL::VERSION}"

puts "openssl lib: #{OpenSSL::OPENSSL_VERSION}"

puts "net-protocol: #{Net::Protocol::VERSION}"

puts "net-http: #{Net::HTTP::VERSION}"

puts Net::HTTP.get(URI(ARGV.first)).encoding

```



Ruby 3.1 (with updated net-protocol and net-http libs):



```

$ ruby -v

ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]

$ ruby req.rb https://www.gnu.org/software/gzip/manual/gzip.pdf

openssl ext: 3.0.0

openssl lib: OpenSSL 1.1.1n  15 Mar 2022

net-protocol: 0.2.1

net-http: 0.3.2

ASCII-8BIT     # <=3D=3D CORRECT

```



Ruby 3.2 (latest git revision):



```

$ ruby -v

ruby 3.2.1 (2023-02-22 revision 65ab2c1ef2) [x86_64-linux]

$ ruby req.rb https://www.gnu.org/software/gzip/manual/gzip.pdf

openssl ext: 3.1.0

openssl lib: OpenSSL 1.1.1n  15 Mar 2022

net-protocol: 0.2.1

net-http: 0.3.2

UTF-8          # <=3D=3D WRONG

```



I've tracked the problem down to the SSL socket call at https://github.com/=
ruby/ruby/blob/9557c8edf2dcf18fdece066c596a71696b2f2b30/lib/net/protocol.rb=
#L218.



The string returned has the encoding set to `ASCII-8BIT`, but `#ascii_only?=
` also always reports true, even when there are non-ascii bytes. This seems=
 to be a bug, and is the probably cause of the change in behavior in net/ht=
tp. On Ruby 3.1 concatenating the result of reading the SSL socket to a UTF=
-8 string produces an ASCII-8BIT string. On Ruby 3.2 the concatenation prod=
uces a UTF-8 string.



Here's a program demonstrating the behavior of the SSL socket:



```ruby

# ssltest.rb

require 'openssl'

require 'uri'



url =3D URI(ARGV.first)

path =3D url.path

path +=3D '?' + url.query if url.query



req =3D "GET #{path} HTTP/1.1\r\nHost: #{url.hostname}\r\nAccept: */*\r\n\r=
\n"



sock =3D OpenSSL::SSL::SSLSocket.open(url.hostname, url.port || HTTPS.defau=
lt_https_port)

sock.connect

sock.write(req)



sleep(1)



loop do

  sleep(0.1)

  b =3D ''.b

  r =3D sock.read_nonblock(1024 * 16, b, exception: false)

  break unless String =3D=3D=3D r

  p [r.bytesize, r.encoding.to_s, r.ascii_only?]

end

```



Ruby 3.1:



```

$ ruby ssltest.rb https://www.gnu.org/software/gzip/manual/gzip.pdf

[475, "ASCII-8BIT", true]

[16384, "ASCII-8BIT", false] # <=3D=3D always false (except HTTP header): C=
ORRECT

[16384, "ASCII-8BIT", false]

...

[13927, "ASCII-8BIT", false]

```



Ruby 3.2:



```

$ ruby ssltest.rb https://www.gnu.org/software/gzip/manual/gzip.pdf

[475, "ASCII-8BIT", true]

[16384, "ASCII-8BIT", true] # <=3D=3D always true: WRONG

[16384, "ASCII-8BIT", true]

...

[13927, "ASCII-8BIT", true]

```









--=20

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

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