Got java.net.ProtocolException: Unexpected status line: '� HTTP/1.1 200 OK' while SOCKS5 return command response with address type 'DOMAIN'

Here is my test case

The SocksServer comes from Netty’s sample https://github.com/netty/netty/blob/4.1/example/src/main/java/io/netty/example/socksproxy/SocksServer.java

And I just make it can start programatically

MockWebServer server = new MockWebServer();
server.enqueue(new MockResponse().setResponseCode(200).setBody("HelloWorld!"));
server.start();

SocksServer proxy = new SocksServer();
proxy.start();

OkHttpClient client = new OkHttpClient.Builder()
        .proxy(new Proxy(Proxy.Type.SOCKS, new InetSocketAddress("127.0.0.1", proxy.port())))
        .build();

Response response = client.newCall(new Request.Builder()
        .url(new URL("http://127.0.0.1:" + server.getPort()))
        .build())
        .execute();

assertTrue(response.isSuccessful());
assertEquals(200, response.code());
assertEquals("OK", response.message());
assertEquals("HelloWorld!", response.body().string());

[ninetymiles]

Here is the tcpdump traffics follow tcp stream with port 1080, printed in Hex Dump format

00000000  05 02 00 02                                        ....
    00000000  05 00                                              ..
00000004  05 01 00 03 09 31 32 37  2e 30 2e 30 2e 31 e7 2e   .....127 .0.0.1..
    00000002  05 00 00 03 09 31 32 37  2e 30 2e 30 2e 31 e7 2e   .....127 .0.0.1..
00000014  47 45 54 20 2f 20 48 54  54 50 2f 31 2e 31 0d 0a   GET / HT TP/1.1..
00000024  48 6f 73 74 3a 20 31 32  37 2e 30 2e 30 2e 31 3a   Host: 12 7.0.0.1:
00000034  35 39 31 38 32 0d 0a 43  6f 6e 6e 65 63 74 69 6f   59182..C onnectio
00000044  6e 3a 20 4b 65 65 70 2d  41 6c 69 76 65 0d 0a 41   n: Keep- Alive..A
00000054  63 63 65 70 74 2d 45 6e  63 6f 64 69 6e 67 3a 20   ccept-En coding: 
00000064  67 7a 69 70 0d 0a 55 73  65 72 2d 41 67 65 6e 74   gzip..Us er-Agent
00000074  3a 20 6f 6b 68 74 74 70  2f 34 2e 32 2e 32 0d 0a   : okhttp /4.2.2..
00000084  0d 0a                                              ..
    00000012  48 54 54 50 2f 31 2e 31  20 32 30 30 20 4f 4b 0d   HTTP/1.1  200 OK.
    00000022  0a 43 6f 6e 74 65 6e 74  2d 4c 65 6e 67 74 68 3a   .Content -Length:
    00000032  20 31 31 0d 0a 0d 0a 48  65 6c 6c 6f 57 6f 72 6c    11....H elloWorl
    00000042  64 21                                              d!

The response line is 05 00 00 03 09 31 32 37 2e 30 2e 30 2e 31 e7 2e 05: socks ver 00: success 00: reserved 03: address type domain name 09: string len 31 32 37 2e 30 2e 30 2e 31: string ‘127.0.0.1’ e7 2e: port 59182

According to https://tools.ietf.org/html/rfc1928, section 6. Replies The address type 03 is a valid value

   The SOCKS request information is sent by the client as soon as it has
   established a connection to the SOCKS server, and completed the
   authentication negotiations.  The server evaluates the request, and
   returns a reply formed as follows:

        +----+-----+-------+------+----------+----------+
        |VER | REP |  RSV  | ATYP | BND.ADDR | BND.PORT |
        +----+-----+-------+------+----------+----------+
        | 1  |  1  | X'00' |  1   | Variable |    2     |
        +----+-----+-------+------+----------+----------+

     Where:

          o  VER    protocol version: X'05'
          o  REP    Reply field:
             o  X'00' succeeded
             o  X'01' general SOCKS server failure
             o  X'02' connection not allowed by ruleset
             o  X'03' Network unreachable
             o  X'04' Host unreachable
             o  X'05' Connection refused
             o  X'06' TTL expired
             o  X'07' Command not supported
             o  X'08' Address type not supported
             o  X'09' to X'FF' unassigned
          o  RSV    RESERVED
          o  ATYP   address type of following address
             o  IP V4 address: X'01'
             o  DOMAINNAME: X'03'
             o  IP V6 address: X'04'
          o  BND.ADDR       server bound address
          o  BND.PORT       server bound port in network octet order

   Fields marked RESERVED (RSV) must be set to X'00'.

   If the chosen method includes encapsulation for purposes of
   authentication, integrity and/or confidentiality, the replies are
   encapsulated in the method-dependent encapsulation.

[Archieeeeee]

Is this related to #3662 , I still got the error: java.net.ProtocolException: Unexpected status line: achefly.cachefly.net��PHTTP/1.1 200 OK