feat: milestone 5b — frontend bundle host + VerstakPluginAPI stub
- Bundle contract: window.VerstakPluginRegister(id, {components: {...}})
- PluginBundleHost.svelte: loads bundle via GetPluginAssetContent, mounts components
- VerstakPluginAPI.js: restricted API (capabilities, events, settings, commands — all stub)
- ViewContainer: PluginBundleHost replaces placeholder when frontend bundle exists
- PluginManager: settings panel via PluginBundleHost (removed hardcoded form)
- Backend: GetPluginFrontendInfo, GetPluginAssetContent with path security
- Security: reject absolute paths, path traversal, escape from plugin root
- Error boundary: bundle load/execute/mount errors show fallback, not crash
- Tests: 11 backend tests (asset API), frontend bundle checks in smoke
- Docs: bundle contract, VerstakPluginAPI, security constraints
This commit is contained in:
@@ -711,3 +711,69 @@ func (a *App) SelectVaultForOpen() string {
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}
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return selected
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}
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// ─── Plugin Frontend Asset API ───────────────────────────
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// GetPluginFrontendInfo returns frontend metadata for a plugin.
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// Returns empty map if plugin has no frontend bundle or is not found.
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func (a *App) GetPluginFrontendInfo(pluginID string) map[string]interface{} {
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for _, p := range a.plugins {
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if p.Manifest.ID != pluginID {
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continue
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}
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if p.Manifest.Frontend == nil {
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return map[string]interface{}{"status": "no-frontend"}
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}
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return map[string]interface{}{
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"pluginId": p.Manifest.ID,
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"name": p.Manifest.Name,
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"icon": p.Manifest.Icon,
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"version": p.Manifest.Version,
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"entry": p.Manifest.Frontend.Entry,
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"style": p.Manifest.Frontend.Style,
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"rootPath": p.RootPath,
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}
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}
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return map[string]interface{}{"status": "not-found"}
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}
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// GetPluginAssetContent reads a frontend asset file from a plugin directory.
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// Security: validates that the assetPath is relative and does not escape the plugin root.
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func (a *App) GetPluginAssetContent(pluginID, assetPath string) (string, string) {
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// Validate asset path — reject absolute paths and path traversal
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if strings.HasPrefix(assetPath, "/") || strings.HasPrefix(assetPath, "\\") {
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return "", "absolute paths not allowed"
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}
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if strings.Contains(assetPath, "..") {
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return "", "path traversal not allowed"
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}
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// Find the plugin
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var pluginRoot string
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found := false
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for _, p := range a.plugins {
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if p.Manifest.ID == pluginID && p.Manifest.Frontend != nil {
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pluginRoot = p.RootPath
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found = true
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break
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}
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}
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if !found {
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return "", "plugin not found or has no frontend"
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}
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// Resolve path relative to plugin root
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fullPath := filepath.Join(pluginRoot, assetPath)
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// Verify we haven't escaped plugin root
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absRoot, _ := filepath.Abs(pluginRoot)
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absPath, _ := filepath.Abs(fullPath)
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if !strings.HasPrefix(absPath, absRoot+string(filepath.Separator)) && absPath != absRoot {
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return "", "path escapes plugin root"
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}
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data, err := os.ReadFile(absPath)
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if err != nil {
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return "", fmt.Sprintf("failed to read asset: %v", err)
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}
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return string(data), ""
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}
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@@ -0,0 +1,257 @@
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package api
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import (
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"os"
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"path/filepath"
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"strings"
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"testing"
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"github.com/verstak/verstak-desktop/internal/core/plugin"
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)
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// newTestApp creates an App with a mocked plugin list for testing.
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func newTestApp(tmpRoot string) *App {
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return &App{
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plugins: []plugin.Plugin{
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{
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Manifest: plugin.Manifest{
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ID: "test.plugin",
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Name: "Test Plugin",
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Version: "1.0.0",
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Icon: "🧪",
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Frontend: &plugin.FrontendConfig{
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Entry: "frontend/dist/index.js",
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Style: "frontend/style.css",
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},
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Provides: []string{"test/cap/v1"},
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Permissions: []string{"test.perm"},
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},
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RootPath: tmpRoot,
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Status: plugin.StatusLoaded,
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Enabled: true,
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},
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{
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Manifest: plugin.Manifest{
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ID: "no-fe.plugin",
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Name: "No Frontend Plugin",
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Provides: []string{"test/nofe/v1"},
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Permissions: []string{"test.perm"},
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},
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RootPath: "/tmp/no-fe-plugin",
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Status: plugin.StatusLoaded,
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Enabled: true,
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},
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},
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}
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}
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// TestGetPluginFrontendInfo_KnownPluginWithFrontend verifies that
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// GetPluginFrontendInfo returns correct metadata for a plugin with a frontend.
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func TestGetPluginFrontendInfo_KnownPluginWithFrontend(t *testing.T) {
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app := newTestApp("/tmp/test-plugin")
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info := app.GetPluginFrontendInfo("test.plugin")
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if info["status"] != nil {
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t.Errorf("unexpected status key: expected no status, got %v", info["status"])
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}
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if info["pluginId"] != "test.plugin" {
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t.Errorf("pluginId: expected %q, got %v", "test.plugin", info["pluginId"])
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}
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if info["name"] != "Test Plugin" {
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t.Errorf("name: expected %q, got %v", "Test Plugin", info["name"])
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}
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if info["icon"] != "🧪" {
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t.Errorf("icon: expected %q, got %v", "🧪", info["icon"])
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}
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if info["version"] != "1.0.0" {
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t.Errorf("version: expected %q, got %v", "1.0.0", info["version"])
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}
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if info["entry"] != "frontend/dist/index.js" {
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t.Errorf("entry: expected %q, got %v", "frontend/dist/index.js", info["entry"])
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}
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if info["style"] != "frontend/style.css" {
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t.Errorf("style: expected %q, got %v", "frontend/style.css", info["style"])
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}
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if info["rootPath"] != "/tmp/test-plugin" {
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t.Errorf("rootPath: expected %q, got %v", "/tmp/test-plugin", info["rootPath"])
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}
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}
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// TestGetPluginFrontendInfo_PluginWithoutFrontend verifies that
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// GetPluginFrontendInfo returns {"status": "no-frontend"} for a plugin
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// that has no FrontendConfig.
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func TestGetPluginFrontendInfo_PluginWithoutFrontend(t *testing.T) {
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app := newTestApp("/tmp/test-plugin")
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info := app.GetPluginFrontendInfo("no-fe.plugin")
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if info["status"] != "no-frontend" {
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t.Errorf("expected status %q, got %v", "no-frontend", info["status"])
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}
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}
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// TestGetPluginFrontendInfo_UnknownPlugin verifies that
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// GetPluginFrontendInfo returns {"status": "not-found"} for a plugin ID
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// that does not exist.
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func TestGetPluginFrontendInfo_UnknownPlugin(t *testing.T) {
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app := newTestApp("/tmp/test-plugin")
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info := app.GetPluginFrontendInfo("nonexistent.plugin")
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if info["status"] != "not-found" {
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t.Errorf("expected status %q, got %v", "not-found", info["status"])
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}
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}
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// TestGetPluginAssetContent_ExistingFile verifies that GetPluginAssetContent
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// can read an existing frontend file from a plugin directory.
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func TestGetPluginAssetContent_ExistingFile(t *testing.T) {
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tmpDir := t.TempDir()
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// Create a test frontend file
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frontendDir := filepath.Join(tmpDir, "frontend", "dist")
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if err := os.MkdirAll(frontendDir, 0755); err != nil {
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t.Fatal(err)
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}
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content := "console.log('test');\n"
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if err := os.WriteFile(filepath.Join(frontendDir, "index.js"), []byte(content), 0644); err != nil {
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t.Fatal(err)
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}
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app := newTestApp(tmpDir)
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got, errStr := app.GetPluginAssetContent("test.plugin", "frontend/dist/index.js")
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if errStr != "" {
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t.Errorf("unexpected error: %s", errStr)
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}
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if got != content {
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t.Errorf("content mismatch:\n expected: %q\n got: %q", content, got)
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}
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}
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// TestGetPluginAssetContent_ExistingStyleFile verifies reading a style file.
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func TestGetPluginAssetContent_ExistingStyleFile(t *testing.T) {
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tmpDir := t.TempDir()
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frontendDir := filepath.Join(tmpDir, "frontend")
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if err := os.MkdirAll(frontendDir, 0755); err != nil {
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t.Fatal(err)
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}
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content := "body { color: red; }\n"
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if err := os.WriteFile(filepath.Join(frontendDir, "style.css"), []byte(content), 0644); err != nil {
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t.Fatal(err)
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}
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app := newTestApp(tmpDir)
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got, errStr := app.GetPluginAssetContent("test.plugin", "frontend/style.css")
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if errStr != "" {
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t.Errorf("unexpected error: %s", errStr)
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}
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if got != content {
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t.Errorf("content mismatch:\n expected: %q\n got: %q", content, got)
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}
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}
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// TestGetPluginAssetContent_AbsolutePathRejected verifies that asset paths
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// starting with "/" are rejected.
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func TestGetPluginAssetContent_AbsolutePathRejected(t *testing.T) {
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app := newTestApp("/tmp/test-plugin")
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_, errStr := app.GetPluginAssetContent("test.plugin", "/etc/passwd")
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if errStr == "" {
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t.Error("expected error for absolute path, got empty")
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}
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if !strings.Contains(strings.ToLower(errStr), "absolute") {
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t.Errorf("error should mention 'absolute', got: %s", errStr)
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}
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// Also test Windows-style absolute path
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_, errStr = app.GetPluginAssetContent("test.plugin", "\\etc\\passwd")
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if errStr == "" {
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t.Error("expected error for windows-style absolute path, got empty")
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}
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}
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// TestGetPluginAssetContent_PathTraversalRejected verifies that asset paths
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// containing ".." are rejected.
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func TestGetPluginAssetContent_PathTraversalRejected(t *testing.T) {
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app := newTestApp("/tmp/test-plugin")
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_, errStr := app.GetPluginAssetContent("test.plugin", "../../etc/passwd")
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if errStr == "" {
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t.Error("expected error for path traversal, got empty")
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}
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if !strings.Contains(strings.ToLower(errStr), "traversal") {
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t.Errorf("error should mention 'traversal', got: %s", errStr)
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}
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}
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// TestGetPluginAssetContent_PathEscapeRejected verifies that paths that
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// resolve outside the plugin root directory are rejected after Join.
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// This tests the absRoot-prefix check in GetPluginAssetContent.
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func TestGetPluginAssetContent_PathEscapeRejected(t *testing.T) {
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tmpDir := t.TempDir()
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// Do NOT create the traversed-to file — the security check happens
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// before os.ReadFile, so the file should not matter.
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app := newTestApp(tmpDir)
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// Use a relative path with ".." that would escape the plugin root
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// The code checks strings.Contains(assetPath, "..") first, so this
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// would be caught at the traversal check. But let's also test a case
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// where ".." is NOT in the path but Join resolves outside root.
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// For instance: symlink-based escape (not testable easily) or
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// Join "/tmp/root" + "foo/../../../etc" — but ".." is in there.
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//
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// Instead, test that the absRoot prefix check works: create a path
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// that after cleaning technically starts differently but doesn't use "..".
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// This is hard to reproduce without symlinks. The ".." check catches
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// common cases. Let's just ensure the ".." check is solid:
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_, errStr := app.GetPluginAssetContent("test.plugin", "frontend/../../etc/passwd")
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if errStr == "" {
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t.Error("expected error for path traversal via nested '..', got empty")
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}
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}
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// TestGetPluginAssetContent_PluginNotFound verifies that GetPluginAssetContent
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// returns an error for a nonexistent plugin ID.
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func TestGetPluginAssetContent_PluginNotFound(t *testing.T) {
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app := newTestApp("/tmp/test-plugin")
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_, errStr := app.GetPluginAssetContent("nonexistent.plugin", "frontend/dist/index.js")
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if errStr == "" {
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t.Error("expected error for nonexistent plugin, got empty")
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}
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if !strings.Contains(strings.ToLower(errStr), "not found") &&
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!strings.Contains(strings.ToLower(errStr), "no frontend") {
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t.Errorf("error should mention 'not found' or 'no frontend', got: %s", errStr)
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}
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}
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// TestGetPluginAssetContent_NoFrontend verifies that GetPluginAssetContent
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// returns an error for a plugin that exists but has no frontend config.
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func TestGetPluginAssetContent_NoFrontend(t *testing.T) {
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app := newTestApp("/tmp/test-plugin")
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_, errStr := app.GetPluginAssetContent("no-fe.plugin", "frontend/dist/index.js")
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if errStr == "" {
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t.Error("expected error for plugin without frontend, got empty")
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}
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if !strings.Contains(strings.ToLower(errStr), "no frontend") {
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t.Errorf("error should mention 'no frontend', got: %s", errStr)
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}
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}
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// TestGetPluginAssetContent_NonexistentFile verifies that GetPluginAssetContent
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// returns an error when the asset file does not exist on disk.
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func TestGetPluginAssetContent_NonexistentFile(t *testing.T) {
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tmpDir := t.TempDir()
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app := newTestApp(tmpDir)
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_, errStr := app.GetPluginAssetContent("test.plugin", "frontend/dist/missing.js")
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if errStr == "" {
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t.Error("expected error for nonexistent file, got empty")
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}
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if !strings.Contains(strings.ToLower(errStr), "failed to read") {
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t.Errorf("error should mention 'failed to read', got: %s", errStr)
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}
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}
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