feat: add gblob scheme support for extension (#1358)

pkg/download/extmock.go

@@ -0,0 +1,87 @@
+package download
+
+import (
+	"fmt"
+	"os"
+)
+
+func NewExtMockDownloader() (*Downloader, func(), error) {
+	d := NewDownloader(&DownloaderConfig{
+		Storage: NewMemStorage(),
+	})
+	if err := d.Setup(); err != nil {
+		return nil, nil, err
+	}
+	cleanup := func() {
+		_ = d.Clear()
+	}
+	return d, cleanup, nil
+}
+
+type ExtMockRuntime struct {
+	engine  engineWrapper
+	session *engineSession
+}
+
+type engineWrapper interface {
+	Close()
+	RunString(script string) (any, error)
+}
+
+func (d *Downloader) NewExtMockRuntime() (*ExtMockRuntime, error) {
+	engine, session := d.newExtensionEngine()
+	ext := &Extension{
+		Name:    "extmock",
+		Author:  "gopeed",
+		Title:   "Gopeed ExtMock Runtime",
+		Version: "0.0.0",
+		DevMode: true,
+	}
+	gopeed := &Instance{
+		Events:   make(InstanceEvents),
+		Info:     NewExtensionInfo(ext),
+		Logger:   newInstanceLogger(ext, d.ExtensionLogger),
+		Settings: map[string]any{},
+		Storage: &ContextStorage{
+			storage:  d.storage,
+			identity: ext.buildIdentity(),
+		},
+	}
+	if err := engine.Runtime.Set("gopeed", gopeed); err != nil {
+		engine.Close()
+		return nil, err
+	}
+	return &ExtMockRuntime{
+		engine:  engine,
+		session: session,
+	}, nil
+}
+
+func (r *ExtMockRuntime) Eval(script string) (any, error) {
+	if r == nil || r.engine == nil {
+		return nil, fmt.Errorf("extmock runtime not initialized")
+	}
+	return r.engine.RunString(script)
+}
+
+func (r *ExtMockRuntime) EvalFile(path string) (any, error) {
+	if path == "" {
+		return nil, fmt.Errorf("script path is empty")
+	}
+	buf, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return r.Eval(string(buf))
+}
+
+func (r *ExtMockRuntime) Close() {
+	if r == nil {
+		return
+	}
+	if r.engine != nil {
+		r.engine.Close()
+	}
+	r.engine = nil
+	r.session = nil
+}