Corrupted when uploading OneDrive API files - api

Question

When I upload and download a file through the onedrive API, it says it is a corrupted file.
Is this an error about the request part by converting the file to bytes when requesting the API?
The API call succeeds, but when I open the file it appears to be corrupted.
[HttpPost("{id}")]
[RequestFormLimits(MultipartBodyLengthLimit = long.MaxValue)]
[DisableRequestSizeLimit]
public ActionResult OneDriveUploadFiles(string id, [FromForm] IFormFile files)
{
string fileName = files.FileName;
int fileSize = Convert.ToInt32(files.Length);
var uploadProvider = new JObject();
var res = new JArray();
if (fileSize < 4194304)
{
var sResult = _oneDriveGraphService.UploadFiles(id, fileName, files).Result;
res.Add(sResult);
}
var result = this.SaveFileDownloadLink(res);
return Ok(result);
}
public async Task<JObject> UploadFiles(string upn, string fileName, IFormFile files)
{
var responseCode = HttpStatusCode.OK;
var jObject = new JObject();
int idx = 0;
int fileSize = Convert.ToInt32(files.Length);
int fragSize = 4 * 1024 * 1024; //4MB => 4 * 1024 * 1024;
var byteRemaining = fileSize;
var numFragments = (byteRemaining / fragSize) + 1;
while (idx < numFragments)
{
var chunkSize = fragSize;
var start = idx * fragSize;
var end = idx * fragSize + chunkSize - 1;
var offset = idx * fragSize;
if (byteRemaining < chunkSize)
{
chunkSize = byteRemaining;
end = fileSize - 1;
}
var contentRange = " bytes " + start + "-" + end + "/" + fileSize;
byte[] file = new byte[chunkSize];
using (var client = new HttpClient())
{
var content = new ByteArrayContent(file);
content.Headers.Add("Content-Length", chunkSize.ToString());
content.Headers.Add("Content-Range", contentRange);
var response = client.PutAsync(url, content);
var strData = response.Result.Content.ReadAsStringAsync().Result;
responseCode = response.Result.StatusCode;
//업로드 성공
if (responseCode == HttpStatusCode.Created)
{
JObject data = JObject.Parse(strData);
string downloadUrl = data["#content.downloadUrl"].ToString();
string itemId = data["id"].ToString();
//파일 크기 -> kb로 변환
fileSize = fileSize / 1000;
jObject = JObject.FromObject(new { name = files.FileName, id = itemId, url = downloadUrl, size = (double)fileSize });
}
//업로드 충돌
else if (responseCode == HttpStatusCode.Conflict)
{
var restart = RestartByteFile(upn, url, files.FileName);
responseCode = restart;
}
}
byteRemaining = byteRemaining - chunkSize;
idx++;
}
if (responseCode == HttpStatusCode.Created) { return jObject; }
else return jObject = JObject.FromObject(new { result = "실패" });
}
I am wondering why the file gets corrupted.
It seems that I get an error when I convert it to bytes and upload it. Is there another way?

Answer 1

The chunk size should be a multiple of 320KiB, except for the last. Can this be your problem?