mitm: Refactor & Add url

script/modules/surge/utils.go

@@ -0,0 +1,50 @@
+package surge
+
+import (
+	"bytes"
+	"compress/gzip"
+	"io"
+
+	"github.com/sagernet/sing-box/script/jsc"
+	E "github.com/sagernet/sing/common/exceptions"
+
+	"github.com/dop251/goja"
+)
+
+type Utils struct {
+	class jsc.Class[*Module, *Utils]
+}
+
+func createUtils(module *Module) jsc.Class[*Module, *Utils] {
+	class := jsc.NewClass[*Module, *Utils](module)
+	class.DefineMethod("geoip", (*Utils).stub)
+	class.DefineMethod("ipasn", (*Utils).stub)
+	class.DefineMethod("ipaso", (*Utils).stub)
+	class.DefineMethod("ungzip", (*Utils).ungzip)
+	class.DefineMethod("toString", (*Utils).toString)
+	return class
+}
+
+func (u *Utils) stub(call goja.FunctionCall) any {
+	return nil
+}
+
+func (u *Utils) ungzip(call goja.FunctionCall) any {
+	if len(call.Arguments) != 1 {
+		panic(u.class.Runtime().NewGoError(E.New("invalid argument")))
+	}
+	binary := jsc.AssertBinary(u.class.Runtime(), call.Argument(0), "binary", false)
+	reader, err := gzip.NewReader(bytes.NewReader(binary))
+	if err != nil {
+		panic(u.class.Runtime().NewGoError(err))
+	}
+	binary, err = io.ReadAll(reader)
+	if err != nil {
+		panic(u.class.Runtime().NewGoError(err))
+	}
+	return jsc.NewUint8Array(u.class.Runtime(), binary)
+}
+
+func (u *Utils) toString(call goja.FunctionCall) any {
+	return "[sing-box Surge utils]"
+}