protected async Task <UploadModel> Upload()
{
var formOptions = new FormOptions();
var result = new UploadModel();
result.Boundary = MultipartRequestHelper.GetBoundary(MediaTypeHeaderValue.Parse(Request.ContentType), formOptions.MultipartBoundaryLengthLimit);
var reader = new MultipartReader(result.Boundary, HttpContext.Request.Body);
var section = (MultipartSection)null;
while ((section = await reader.ReadNextSectionAsync()) != null)
{
if (ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var contentDisposition))
{
if (MultipartRequestHelper.HasFile(contentDisposition))
{
result.FileName = contentDisposition.FileName.ToString();
result.Stream = section.Body;
return(result);
}
else if (MultipartRequestHelper.HasModel(contentDisposition))
{
using (var factory = new DBItemConverterFactory(HttpContext))
{
var option = new JsonSerializerOptions();
option.InitDefaults(factory);
result.Model = await JsonSerializer.DeserializeAsync <T>(section.Body, option);
}
}
else if (MultipartRequestHelper.HasFormData(contentDisposition))
{
var key = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
var encoding = MultipartRequestHelper.GetEncoding(section);
using (var streamReader = new StreamReader(section.Body, encoding, detectEncodingFromByteOrderMarks: true, bufferSize: 2048, leaveOpen: true))
{
// The value length limit is enforced by MultipartBodyLengthLimit
var value = await streamReader.ReadToEndAsync();
if (String.Equals(value, "undefined", StringComparison.OrdinalIgnoreCase))
{
value = String.Empty;
}
if (StringSegment.Equals(key, "LastWriteTime", StringComparison.OrdinalIgnoreCase) &&
DateTime.TryParseExact(value, "o", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind, out var lastWriteTime))
{
result.ModificationDate = lastWriteTime;
}
else
{
result.Content[key.ToString()] = value;
}
}
}
}
}
return(result);
}
public virtual async Task <ActionResult <T> > UploadFileModel()
{
if (table.FileNameKey == null)
{
return(BadRequest("No file columns presented!"));
}
if (!MultipartRequestHelper.IsMultipartContentType(Request.ContentType))
{
return(BadRequest($"Expected a multipart request, but got {Request.ContentType}"));
}
using (var transaction = new DBTransaction(table.Connection, CurrentUser))
{
try
{
var upload = await Upload();
if (upload != null)
{
var item = upload.Model as T;
if (item == null)
{
return(NotFound());
}
if (IsDenied(item, transaction.Caller))
{
item.Reject(transaction.Caller);
return(Forbid());
}
if (string.IsNullOrEmpty(item.GetValue <string>(table.FileNameKey)))
{
item.SetValue(upload.FileName, table.FileNameKey);
}
if (upload.Stream != null)
{
if (table.FileLastWriteKey != null && !item.IsChangedKey(table.FileLastWriteKey))
{
item.SetValueNullable <DateTime>(upload.ModificationDate ?? DateTime.UtcNow, table.FileLastWriteKey);
}
if (table.FileLOBKey != null)
{
await item.SetLOB(upload.Stream, table.FileLOBKey, transaction);
}
else if (table.FileKey != null)
{
await item.SetStream(upload.Stream, table.FileKey, transaction);
}
}
else
{
await item.Save(transaction);
}
transaction.Commit();
return(item);
}
return(BadRequest("Expect mutipart request name=file"));
}
catch (Exception ex)
{
transaction.Rollback();
return(BadRequest(ex));
}
}
}
