ltex-ls-plus not working over Tcp

[JonasWischeropp]

Describe the bug
Using ltex-ls-plus over Tcp throws an exception.
In VS Code just the loading symbol is shown.

(When I use the VS Code extension normally without setting ltex.languageToolHttpServerUri everything works.)

Steps to reproduce
Steps to reproduce the behavior:

1. start ls:
   $HOME/.vscode/extensions/ltex-plus.vscode-ltex-plus-15.1.0/lib/ltex-ls-plus-18.1.0/bin/ltex-ls-plus --server-type=TcpSocket --port=9095
2. perform the VS Code LTeX: Check Current Document action

Expected behavior
The document should be checked.

LTeX configuration
"ltex.languageToolHttpServerUri": "http://localhost:9095/"

LTeX LS log

Oct 10, 2024 3:52:31 PM org.bsplines.ltexls.LtexLanguageServerLauncher launchServer
INFO: Waiting for client to connect on port 9095...
Oct 10, 2024 3:52:35 PM org.bsplines.ltexls.LtexLanguageServerLauncher launchServer
INFO: Connected to client on port 9095
Oct 10, 2024 3:52:45 PM org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint lambda$recursiveFindRpcMethods$2
SEVERE: A delegate object is null, jsonrpc methods of 'public default org.eclipse.lsp4j.services.NotebookDocumentService org.eclipse.lsp4j.services.LanguageServer.getNotebookDocumentService()' are ignored
Oct 10, 2024 3:52:45 PM org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer fireError
SEVERE: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
	at com.google.gson.Gson.fromJson(Gson.java:975)
	at org.eclipse.lsp4j.jsonrpc.json.MessageJsonHandler.parseMessage(MessageJsonHandler.java:119)
	at org.eclipse.lsp4j.jsonrpc.json.MessageJsonHandler.parseMessage(MessageJsonHandler.java:114)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:193)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
	at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:384)
	at org.eclipse.lsp4j.jsonrpc.json.adapters.MessageTypeAdapter.read(MessageTypeAdapter.java:92)
	at org.eclipse.lsp4j.jsonrpc.json.adapters.MessageTypeAdapter.read(MessageTypeAdapter.java:55)
	at com.google.gson.Gson.fromJson(Gson.java:963)
	... 11 more

Version information

• Operating system: Ubuntu 22.04.5 LTS
• vscode-ltex-plus: 15.1.0
• ltex-ls-plus: 18.1.0
• Java: 21.0.4+7

(Uses the versions distributed with vscode-ltex-plus)

[spitzerd]

Confirmed. I have tried Windows and Ubuntu and I get the same error. It's also not working with the original LTeX from Julian Valentin

[spitzerd]

I have to correct my previous statement. The usage you described in your issue is wrong. It's not meaningful to point "ltex.languageToolHttpServerUri" to ltex-ls-plus. Let me explain:

• The VS Code extension communicated always via the Language Server Protocol (LSP) with the language server ltex-ls-plus
• ltex-ls-plus can spell check either with the integrated LanguageTool or can communicate with an HTTP LanguageTool server

The option--server-type=TcpSocket was designed for other purposes and I also don't know how to use it exactly.

I guess your use case is to run the spell check on another server and not on your computer.

• Start LanguageTool on your server or your computer. You can find a manual here: https://dev.languagetool.org/http-server
• Set "ltex.languageToolHttpServerUri" to the address of your LanguageTool Server, e.g. http://localhost:8081

[JonasWischeropp]

Thank you. I should have read the documentation more carefully. Turns out it's actually ltex.ltex-ls.path I was looking for
to test my changes to ltex-ls-plus with the vscode client.