fix: avoid crash on invalid URIs (#969)

internal/langserver/handlers/did_change_workspace_folders.go

@@ -7,14 +7,31 @@ import (
 	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/document"
 	lsp "github.com/hashicorp/terraform-ls/internal/protocol"
+	"github.com/hashicorp/terraform-ls/internal/uri"
 )
 
 func (svc *service) DidChangeWorkspaceFolders(ctx context.Context, params lsp.DidChangeWorkspaceFoldersParams) error {
 	for _, removed := range params.Event.Removed {
+		if !uri.IsURIValid(removed.URI) {
+			jrpc2.ServerFromContext(ctx).Notify(ctx, "window/showMessage", &lsp.ShowMessageParams{
+				Type: lsp.Warning,
+				Message: fmt.Sprintf("Ignoring workspace folder (unsupport or invalid URI) %s."+
+					" This is most likely bug, please report it.", removed.URI),
+			})
+			continue
+		}
 		svc.removeIndexedModule(ctx, removed.URI)
 	}
 
 	for _, added := range params.Event.Added {
+		if !uri.IsURIValid(added.URI) {
+			jrpc2.ServerFromContext(ctx).Notify(ctx, "window/showMessage", &lsp.ShowMessageParams{
+				Type: lsp.Warning,
+				Message: fmt.Sprintf("Ignoring workspace folder (unsupport or invalid URI) %s."+
+					" This is most likely bug, please report it.", added.URI),
+			})
+			continue
+		}
 		svc.indexNewModule(ctx, added.URI)
 	}
 

internal/langserver/handlers/did_open.go

@@ -2,19 +2,35 @@ package handlers
 
 import (
 	"context"
+	"fmt"
 
+	"github.com/creachadair/jrpc2"
 	"github.com/hashicorp/terraform-ls/internal/document"
 	"github.com/hashicorp/terraform-ls/internal/job"
-	ilsp "github.com/hashicorp/terraform-ls/internal/lsp"
 	lsp "github.com/hashicorp/terraform-ls/internal/protocol"
 	"github.com/hashicorp/terraform-ls/internal/state"
 	"github.com/hashicorp/terraform-ls/internal/terraform/exec"
 	"github.com/hashicorp/terraform-ls/internal/terraform/module"
 	op "github.com/hashicorp/terraform-ls/internal/terraform/module/operation"
+	"github.com/hashicorp/terraform-ls/internal/uri"
 )
 
 func (svc *service) TextDocumentDidOpen(ctx context.Context, params lsp.DidOpenTextDocumentParams) error {
-	dh := ilsp.HandleFromDocumentURI(params.TextDocument.URI)
+	docURI := string(params.TextDocument.URI)
+
+	// URIs are always checked during initialize request, but
+	// we still allow single-file mode, therefore invalid URIs
+	// can still land here, so we check for those.
+	if !uri.IsURIValid(docURI) {
+		jrpc2.ServerFromContext(ctx).Notify(ctx, "window/showMessage", &lsp.ShowMessageParams{
+			Type: lsp.Warning,
+			Message: fmt.Sprintf("Ignoring workspace folder (unsupport or invalid URI) %s."+
+				" This is most likely bug, please report it.", docURI),
+		})
+		return fmt.Errorf("invalid URI: %s", docURI)
+	}
+
+	dh := document.HandleFromURI(docURI)
 
 	err := svc.stateStore.DocumentStore.OpenDocument(dh, params.TextDocument.LanguageID,
 		int(params.TextDocument.Version), []byte(params.TextDocument.Text))

internal/langserver/handlers/initialize.go

@@ -38,6 +38,7 @@ func (svc *service) Initialize(ctx context.Context, params lsp.InitializeParams)
 	svc.server = jrpc2.ServerFromContext(ctx)
 
 	setupTelemetry(expClientCaps, svc, ctx, properties)
+	defer svc.telemetry.SendEvent(ctx, "initialize", properties)
 
 	if params.ClientInfo.Name != "" {
 		err = ilsp.SetClientName(ctx, params.ClientInfo.Name)
@@ -126,9 +127,11 @@ func (svc *service) Initialize(ctx context.Context, params lsp.InitializeParams)
 			})
 		}
 	} else {
-		if !uri.IsURIValid(string(params.RootURI)) {
+		rootURI := string(params.RootURI)
+		if !uri.IsURIValid(rootURI) {
 			properties["root_uri"] = "invalid"
-			return serverCaps, fmt.Errorf("URI %q is not valid", params.RootURI)
+			return serverCaps, fmt.Errorf("Unsupported or invalid URI: %q "+
+				"This is most likely bug, please report it.", rootURI)
 		}
 
 		err := svc.setupWalker(ctx, params, cfgOpts)
@@ -162,7 +165,6 @@ func setupTelemetry(expClientCaps lsp.ExpClientCapabilities, svc *service, ctx c
 		}
 		svc.logger.Printf("telemetry enabled (version: %d)", tv)
 	}
-	defer svc.telemetry.SendEvent(ctx, "initialize", properties)
 }
 
 func getTelemetryProperties(out *settings.DecodedOptions) map[string]interface{} {
@@ -238,7 +240,8 @@ func initializeResult(ctx context.Context) lsp.InitializeResult {
 }
 
 func (svc *service) setupWalker(ctx context.Context, params lsp.InitializeParams, options *settings.Options) error {
-	root := document.DirHandleFromURI(string(params.RootURI))
+	rootURI := string(params.RootURI)
+	root := document.DirHandleFromURI(rootURI)
 
 	err := lsctx.SetRootDirectory(ctx, root.Path())
 	if err != nil {
@@ -261,15 +264,24 @@ func (svc *service) setupWalker(ctx context.Context, params lsp.InitializeParams
 	}
 
 	if len(params.WorkspaceFolders) > 0 {
-		for _, folderPath := range params.WorkspaceFolders {
-			modPath := document.DirHandleFromURI(folderPath.URI)
+		for _, folder := range params.WorkspaceFolders {
+			if !uri.IsURIValid(folder.URI) {
+				jrpc2.ServerFromContext(ctx).Notify(ctx, "window/showMessage", &lsp.ShowMessageParams{
+					Type: lsp.Warning,
+					Message: fmt.Sprintf("Ignoring workspace folder (unsupport or invalid URI) %s."+
+						" This is most likely bug, please report it.", folder.URI),
+				})
+				continue
+			}
+
+			modPath := document.DirHandleFromURI(folder.URI)
 
 			err := svc.stateStore.WalkerPaths.EnqueueDir(modPath)
 			if err != nil {
 				jrpc2.ServerFromContext(ctx).Notify(ctx, "window/showMessage", &lsp.ShowMessageParams{
 					Type: lsp.Warning,
 					Message: fmt.Sprintf("Ignoring workspace folder %s: %s."+
-						" This is most likely bug, please report it.", folderPath.URI, err),
+						" This is most likely bug, please report it.", folder.URI, err),
 				})
 				continue
 			}