Example of how to write binary download to disk ?

[Rockvole]

Hi,
I am trying to download a zipfile and store the resulting zip file to disk.

Options options= new Options(
    responseType: ResponseType.STREAM
);
Dio dio = new Dio(options);
Response response=await dio.get(url);
File file = new File(outputDirectory+ filename);
await file.writeAsBytes(response.data);

writeAsBytes doesnt seem to return.

Do you have an example of how to do this ?

[wendux]

Why not use download API directly ?

[Rockvole]

Ok, thanks for the tip.
I tried :

Options options= new Options(
    responseType: ResponseType.STREAM
);
Dio dio = new Dio(options);
try {
  Response response = await dio.download(
      url, outputDirectory + filename, flush: true);
  dio.interceptor.response.onError = (DioError e) {
    print("error=" + e.message);
  };
} on DioError catch (e) {
  print("error "+e.message);
}

It does download the file, but is never returning from the download method.

[wendux]

could you print the response ?

[Rockvole]

I don't believe there was any error, although that was a month ago. I have just used the standard dart mechanism instead.

[wendux]

I'm sorry to reply late.
In my local, It works normally, May you need to update the dio to latest version, my test code as follows:

  try {
    Response response=await dio.download(url,
      "./example/flutter.png",
      // Listen the download progress.
      onProgress: (received, total) {
        print((received / total * 100).toStringAsFixed(0) + "%");
      }
    );
    print("xxx");
  } catch (e) {
    print(e);
  }

The xxx displays in console.

Close first, and open again when there is a problem。