feat: direct call download api by cgo

pkg/api/model/result.go

@@ -0,0 +1,58 @@
+package model
+
+import "encoding/json"
+
+type RespCode int
+
+const (
+	CodeOk RespCode = 0
+	// CodeError is the common error code
+	CodeError RespCode = 1000
+	// CodeUnauthorized is the error code for unauthorized
+	CodeUnauthorized RespCode = 1001
+	// CodeInvalidParam is the error code for invalid parameter
+	CodeInvalidParam RespCode = 1002
+	// CodeTaskNotFound is the error code for task not found
+	CodeTaskNotFound RespCode = 2001
+)
+
+type Result[T any] struct {
+	Code RespCode `json:"code"`
+	Msg  string   `json:"msg"`
+	Data T        `json:"data"`
+}
+
+func (r *Result[T]) Json() string {
+	buf, _ := json.Marshal(r)
+	return string(buf)
+}
+
+func (r *Result[T]) HasError() bool {
+	return r.Code != CodeOk
+}
+
+func NewOkResult[T any](data T) *Result[T] {
+	return &Result[T]{
+		Code: CodeOk,
+		Data: data,
+	}
+}
+
+func NewNilResult() *Result[any] {
+	return &Result[any]{
+		Code: CodeOk,
+	}
+}
+
+func NewErrorResult[T any](msg string, code ...RespCode) *Result[T] {
+	// if code is not provided, the default code is CodeError
+	c := CodeError
+	if len(code) > 0 {
+		c = code[0]
+	}
+
+	return &Result[T]{
+		Code: c,
+		Msg:  msg,
+	}
+}