MethodNotFound Error

[patrickdemers6]

I am working on setting up a new Language Server for VS Code and am having some troubles with some incoming requests. It may be specific to workspace/* commands. When they are sent, a MethodNotFound response is sent.

The logs look like this:

use stdio mode.
Request: [0] [initialize], content: [{"processId":485172,"clientInfo":{"name":"Visual Studio Code","version":"1.72.2"},"locale":"en-us","rootPath":"path_here","rootUri":"path_here","capabilities":{"workspace":{"applyEdit":true,"workspaceEdit":{"documentChanges":true,"resourceOperations":["create","rename","delete"],"failureHandling":"textOnlyTransactional","normalizesLineEndings":true,"changeAnnotationSupport":{"groupsOnLabel":true}},"configuration":true,"didChangeWatchedFiles":{"dynamicRegistration":true,"relativePatternSupport":true},"symbol":{"dynamicRegistration":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]},"tagSupport":{"valueSet":[1]},"resolveSupport":{"properties":["location.range"]}},"codeLens":{"refreshSupport":true},"executeCommand":{"dynamicRegistration":true},"didChangeConfiguration":{"dynamicRegistration":true},"workspaceFolders":true,"semanticTokens":{"refreshSupport":true},"fileOperations":{"dynamicRegistration":true,"didCreate":true,"didRename":true,"didDelete":true,"willCreate":true,"willRename":true,"willDelete":true},"inlineValue":{"refreshSupport":true},"inlayHint":{"refreshSupport":true},"diagnostics":{"refreshSupport":true}},"textDocument":{"publishDiagnostics":{"relatedInformation":true,"versionSupport":false,"tagSupport":{"valueSet":[1,2]},"codeDescriptionSupport":true,"dataSupport":true},"synchronization":{"dynamicRegistration":true,"willSave":true,"willSaveWaitUntil":true,"didSave":true},"completion":{"dynamicRegistration":true,"contextSupport":true,"completionItem":{"snippetSupport":true,"commitCharactersSupport":true,"documentationFormat":["markdown","plaintext"],"deprecatedSupport":true,"preselectSupport":true,"tagSupport":{"valueSet":[1]},"insertReplaceSupport":true,"resolveSupport":{"properties":["documentation","detail","additionalTextEdits"]},"insertTextModeSupport":{"valueSet":[1,2]},"labelDetailsSupport":true},"insertTextMode":2,"completionItemKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]},"completionList":{"itemDefaults":["commitCharacters","editRange","insertTextFormat","insertTextMode"]}},"hover":{"dynamicRegistration":true,"contentFormat":["markdown","plaintext"]},"signatureHelp":{"dynamicRegistration":true,"signatureInformation":{"documentationFormat":["markdown","plaintext"],"parameterInformation":{"labelOffsetSupport":true},"activeParameterSupport":true},"contextSupport":true},"definition":{"dynamicRegistration":true,"linkSupport":true},"references":{"dynamicRegistration":true},"documentHighlight":{"dynamicRegistration":true},"documentSymbol":{"dynamicRegistration":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]},"hierarchicalDocumentSymbolSupport":true,"tagSupport":{"valueSet":[1]},"labelSupport":true},"codeAction":{"dynamicRegistration":true,"isPreferredSupport":true,"disabledSupport":true,"dataSupport":true,"resolveSupport":{"properties":["edit"]},"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"honorsChangeAnnotations":false},"codeLens":{"dynamicRegistration":true},"formatting":{"dynamicRegistration":true},"rangeFormatting":{"dynamicRegistration":true},"onTypeFormatting":{"dynamicRegistration":true},"rename":{"dynamicRegistration":true,"prepareSupport":true,"prepareSupportDefaultBehavior":1,"honorsChangeAnnotations":true},"documentLink":{"dynamicRegistration":true,"tooltipSupport":true},"typeDefinition":{"dynamicRegistration":true,"linkSupport":true},"implementation":{"dynamicRegistration":true,"linkSupport":true},"colorProvider":{"dynamicRegistration":true},"foldingRange":{"dynamicRegistration":true,"rangeLimit":5000,"lineFoldingOnly":true,"foldingRangeKind":{"valueSet":["comment","imports","region"]},"foldingRange":{"collapsedText":false}},"declaration":{"dynamicRegistration":true,"linkSupport":true},"selectionRange":{"dynamicRegistration":true},"callHierarchy":{"dynamicRegistration":true},"semanticTokens":{"dynamicRegistration":true,"tokenTypes":["namespace","type","class","enum","interface","struct","typeParameter","parameter","variable","property","enumMember","event","function","method","macro","keyword","modifier","comment","string","number","regexp","operator","decorator"],"tokenModifiers":["declaration","definition","readonly","static","deprecated","abstract","async","modification","documentation","defaultLibrary"],"formats":["relative"],"requests":{"range":true,"full":{"delta":true}},"multilineTokenSupport":false,"overlappingTokenSupport":false,"serverCancelSupport":true,"augmentsSyntaxTokens":true},"linkedEditingRange":{"dynamicRegistration":true},"typeHierarchy":{"dynamicRegistration":true},"inlineValue":{"dynamicRegistration":true},"inlayHint":{"dynamicRegistration":true,"resolveSupport":{"properties":["tooltip","textEdits","label.tooltip","label.location","label.command"]}},"diagnostic":{"dynamicRegistration":true,"relatedDocumentSupport":false}},"window":{"showMessage":{"messageActionItem":{"additionalPropertiesSupport":true}},"showDocument":{"support":true},"workDoneProgress":true},"general":{"staleRequestSupport":{"cancel":true,"retryOnContentModified":["textDocument/semanticTokens/full","textDocument/semanticTokens/range","textDocument/semanticTokens/full/delta"]},"regularExpressions":{"engine":"ECMAScript","version":"ES2020"},"markdown":{"parser":"marked","version":"1.1.0"},"positionEncodings":["utf-16"]},"notebookDocument":{"synchronization":{"dynamicRegistration":true,"executionSummarySupport":true}}},"trace":"off","workspaceFolders":[{"uri":"path_here","name":"legv8_examples"}]}]
Response: [0] res: [{"jsonrpc":"","id":0,"result":{"capabilities":{"hoverProvider":true}},"error":null}]
Request: [<nil>] [initialized], content: [{}]
Request: [<nil>] [workspace/didChangeConfiguration], content: [{"settings":{}}]
Response: [<nil>] res: [{"jsonrpc":"","id":null,"result":null,"error":{"code":-32601,"message":"MethodNotFound","data":null}}]
Request: [<nil>] [workspace/didChangeWatchedFiles], content: [{"changes":[{"uri":"path_here","type":2}]}]
Response: [<nil>] res: [{"jsonrpc":"","id":null,"result":null,"error":{"code":-32601,"message":"MethodNotFound","data":null}}]

And the simplified logic of what I have running is this:

func main() {

	server := lsp.NewServer(&lsp.Options{CompletionProvider: &defines.CompletionOptions{
		TriggerCharacters: &[]string{"."},
	}})

	server.OnHover(func(ctx context.Context, req *defines.HoverParams) (result *defines.Hover, err error) {
		logs.Println("hover: ", req)
		file, err := ReadFile(req.TextDocument.Uri)
		if err != nil {
			logs.Println("hover: failed to read req.TextDocument.Uri" + err.Error())
		}

		w := getWord(file[req.Position.Line], int(req.Position.Character))
		token := definitions.Tokens[w]

		if token.Name == "" {
			return &defines.Hover{Contents: defines.MarkupContent{Kind: defines.MarkupKindMarkdown, Value: "#### Unknown Token"}}, nil
		}

		return &defines.Hover{Contents: defines.MarkupContent{Kind: defines.MarkupKindMarkdown, Value: "### " + token.Name + "\n" + token.Description}}, nil
	})

	server.OnDidChangeWatchedFiles(func(ctx context.Context, req *defines.DidChangeWatchedFilesParams) (err error) {
		logs.Println("test")
		return nil
	})

	server.OnInitialized(func(ctx context.Context, req *defines.InitializeParams) (err error) {
		return nil
	})

	server.OnDidChangeConfiguration(func(ctx context.Context, req *defines.DidChangeConfigurationParams) (err error) {
		logs.Println("invoked OnDidChangeConfiguration")
		return nil
	})

	server.OnInitialize(func(ctx context.Context, req *defines.InitializeParams) (result *defines.InitializeResult, err *defines.InitializeError) {
		logs.Println("initialized")
		s := &defines.InitializeResult{}
		s.Capabilities.HoverProvider = true
		s.Capabilities.WorkspaceSymbolProvider = true
		s.Capabilities.DocumentFormattingProvider = true
		return s, nil
	})

	server.Run()
}

In theory, shouldn't the server.OnDidChangeWatchedFiles be called when the workspace/didChangeWatchedFiles request comes in?

[zhangleibg]

it seems that the notification of 'server.OnDidChangeWatchedFiles' is denoted as 'didChangeWatchedFiles', while the name in standard LSP is 'textDocument/didOpen'. The same issue occur in 'OnDidChangeTextDocument' and 'OnDidOpenTextDocument'

[bit0rez]

@TobiasYin I created a PR, please check it.