MultipartRequest 成功上传到s3，但数据似乎无效

Question

在 Flutter 中，这似乎是一个非常简单的过程。但是当我下载我上传到 s3 的视频时，我无法播放视频。视频播放器告诉我数据已损坏。 uploadUri 是预签名的 s3 link。 filePath 是我视频的正确路径。我从发送中收到 200 响应。

  Future<void> postVideo( String filePath, String uploadUri ) async {
    var request = http.MultipartRequest('PUT', Uri.parse( uploadUri ) );
    request.files.add(
        await http.MultipartFile.fromPath(
            'video',
            filePath,
            contentType: MediaType('video','mp4')
    ));
    final response = await request.send();
    if (response.statusCode == 201 || response.statusCode == 200 ) {
      print( 'submit video response: ' + response.toString() );
    } else {
      throw Exception('Failed to post video');
    }
  }

有什么想法吗？

Answer 1

这是有效的方法，不确定是什么魔法..

Future<void> postVideo( String filePath, String uploadUri ) async {
File file = File(filePath);
List<int> imageData = file.readAsBytesSync();

var response = await http.put(uploadUri, body: imageData, headers: {
  "Content-Type": "octet-stream",
  "Content-Disposition": 'attachment; filename="resource"',
  "Content-Encoding": "identity",
  "Content-Length": file.lengthSync().toString()
});

if (response.statusCode == 201 || response.statusCode == 200 ) {
  print( 'submit video response: ' + response.toString() );
} else {
  throw Exception('Failed to post story');
}

}

MultipartRequest 成功上传到s3，但数据似乎无效

MultipartRequest uploads successfully to s3, but data appears to be invalid

http

multipart

amazon-s3

flutter