feat: direct call download api by cgo dart

bind/desktop/main.go

@@ -1,15 +1,11 @@
 package main
 
-/*
-#include <stdlib.h>
-*/
 import "C"
 import (
 	"encoding/json"
 	"github.com/GopeedLab/gopeed/bind"
 	"github.com/GopeedLab/gopeed/pkg/api"
 	"github.com/GopeedLab/gopeed/pkg/api/model"
-	"unsafe"
 )
 
 func main() {}
@@ -20,7 +16,6 @@ func Create(cfg *C.char) *C.char {
 	if err := json.Unmarshal([]byte(C.GoString(cfg)), &config); err != nil {
 		return C.CString(bind.BuildResult(err))
 	}
-	defer C.free(unsafe.Pointer(cfg))
 
 	return C.CString(bind.Create(&config))
 }
@@ -31,7 +26,6 @@ func Invoke(index int, req *C.char) *C.char {
 	if err := json.Unmarshal([]byte(C.GoString(req)), &request); err != nil {
 		return C.CString(bind.BuildResult(err))
 	}
-	defer C.free(unsafe.Pointer(req))
 
 	return C.CString(bind.Invoke(index, &request))
 }