flutter - Flutter - 如何获取 Video mp4 的 Stream Response 并下载

Question

我正在使用多部分请求，然后我在其中发布图像，然后我得到了 video.mp4 的响应，但我不知道如何获得我尝试过的响应

       response.stream.bytetoString()  //which give me formatexception which is unexpected byte 

我不知道如何获取此文件并在我的颤振应用程序中下载和播放它是代码：

   Uri uri = Uri.parse(HttpLinks.localUrl);

  var stream = ByteStream(image.openRead());
  stream.cast();
  var length = await image.length();

  // here is path of image is uploading

  var request = MultipartRequest('POST', uri)
    ..files.add(
     MultipartFile(
        'file1',
        stream,
        length,
        filename:image.path,
      // contentType: MediaType('image',"jpg/png"),
      ),
    );
  var response = await request.send();// here i get response 
  if (response.statusCode == 200) {
    print('quick response is ${await response.stream.bytesToString()}');

   // here is i get exception which is 
            FormatException: Unexpected extension byte (at offset 43)

    return await response.stream.bytesToString();
  } 

请指导我该怎么做。

Answer 1

感谢 Rick 指导我解决这个问题！将此设置为使用流响应获取 video.mp4 文件

  if (response.statusCode == 200) {

 final directory = await getExternalStorageDirectory();
  var file = await File('${directory.path}/video.mp4').create(recrusive: true);
 var bytes = <int>[];
response.Stream.listen{
  (newBytes){
    bytes.addAll(newBytes);
  },
   onDone: () async{
      await file.writeAsBytes(bytes);
   }
}
}
 return file;