Oficial client with microsoft auth is not connect to 1.12.2 vanilla server via ./node_modules/minecraft-protocol/examples/proxy

[lastuniverse]

Versions

• minecraft-protocol: 1.35.1
• server: vanilla 1.12.2
• node: 16.16.0

Detailed description of a problem

Oficial client with microsoft auth is not connect to 1.12.2 vanilla server via ./node_modules/minecraft-protocol/examples/proxy

For detailed see section "Expected behavior"

Current code

// none )))

Expected behavior

Obviously connect to the server through a proxy)))

Additional context

in minecraft server folder:

• set online-mode=false in server.properties file
• start minecraft server with command java -Xmx1024M -Xms1024M -jar server.1.12.2.jar nogui

in custom folder

rm -rf ~/.minecraft
rm -rf ./*
npm install minecraft-protocol
cd ./node_modules/minecraft-protocol/examples/proxy
node ./proxy.js localhost 1.12.2

then start oficial minecraft-launcher
then install and start minecraft client 1.12.2
then add server and proxy in client

• server: localhost:25565
• proxy: localhost:25566

then test connect to server [success]
then test connect to server via proxy [error]
in server console:

[11:24:11] [Server thread/INFO]: Starting minecraft server version 1.12.2
[11:24:11] [Server thread/INFO]: Loading properties
[11:24:11] [Server thread/INFO]: Default game type: SURVIVAL
[11:24:11] [Server thread/INFO]: Generating keypair
[11:24:11] [Server thread/INFO]: Starting Minecraft server on *:25565
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by io.netty.util.internal.ReflectionUtil (file:/...../server/server.1.12.2.jar) to constructor java.nio.DirectByteBuffer(long,int)
WARNING: Please consider reporting this to the maintainers of io.netty.util.internal.ReflectionUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[11:24:11] [Server thread/INFO]: Using epoll channel type
[11:24:11] [Server thread/WARN]: **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
[11:24:11] [Server thread/WARN]: The server will make no attempt to authenticate usernames. Beware.
[11:24:11] [Server thread/WARN]: While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.
[11:24:11] [Server thread/WARN]: To change this, set "online-mode" to "true" in the server.properties file.
[11:24:11] [Server thread/INFO]: Preparing level "world"
[11:24:11] [Server thread/INFO]: Loaded 488 advancements
[11:24:11] [Server thread/INFO]: Preparing start region for level 0
[11:24:12] [Server thread/INFO]: Preparing spawn area: 28%
[11:24:13] [Server thread/INFO]: Preparing spawn area: 99%
[11:24:13] [Server thread/INFO]: Done (2,271s)! For help, type "help" or "?"

in proxy console:

Incoming connection (::ffff:127.0.0.1)
Connection error by server (::ffff:127.0.0.1)  Error: ForbiddenOperationException
    at call (/....../node_modules/yggdrasil/src/utils.js:35:40)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async refresh (/....../node_modules/yggdrasil/src/Client.js:43:18)
Error: ForbiddenOperationException
    at call (/....../node_modules/yggdrasil/src/utils.js:35:40)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async refresh (/....../node_modules/yggdrasil/src/Client.js:43:18)
Connection closed by client (::ffff:127.0.0.1)

[lastuniverse]

!!!WARN!!!
connect to serever via proxy is success if change code in ./node_modules/minecraft-protocol/examples/proxy/proxy.js
from username: client.username,
to username: client.username+'any_text',

But this option is not good, as it breaks usernames(

[ghost]

But this option is not good, as it breaks usernames(

username: client.username + ''

[lastuniverse]

I also thought that client.username is not a string, but there is a string. The solution you suggested does not fix the error.