protected IEnumerable <UploadModel> Upload()
{
var formAccumulator = new KeyValueAccumulator();
var boundary = MultipartRequestHelper.GetBoundary(MediaTypeHeaderValue.Parse(Request.ContentType), formOptions.MultipartBoundaryLengthLimit);
var reader = new MultipartReader(boundary, HttpContext.Request.Body);
var section = reader.ReadNextSectionAsync().GetAwaiter().GetResult();
while (section != null)
{
if (ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var contentDisposition))
{
if (MultipartRequestHelper.HasFileContentDisposition(contentDisposition))
{
var result = new UploadModel
{
FileName = contentDisposition.FileName.ToString(),
Stream = section.Body
};
yield return(result);
}
else if (MultipartRequestHelper.HasFormDataContentDisposition(contentDisposition))
{
// Content-Disposition: form-data; name="key"
// Do not limit the key name length here because the
// multipart headers length limit is already in effect.
var key = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
var encoding = 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 = streamReader.ReadToEnd();
if (String.Equals(value, "undefined", StringComparison.OrdinalIgnoreCase))
{
value = String.Empty;
}
formAccumulator.Append(key.ToString(), value);
if (formAccumulator.ValueCount > formOptions.ValueCountLimit)
{
throw new InvalidDataException($"Form key count limit {formOptions.ValueCountLimit} exceeded.");
}
}
}
}
section = reader.ReadNextSectionAsync().GetAwaiter().GetResult();
}
}
public async Task <ActionResult> UploadFile([FromRoute] K id, [FromRoute] string fileName)
{
if (table.FileNameKey == null)
{
return(BadRequest("No file columns presented!"));
}
if (!MultipartRequestHelper.IsMultipartContentType(Request.ContentType))
{
return(BadRequest($"Expected a multipart request, but got {Request.ContentType}"));
}
using (var transaction = new DBTransaction(table.Connection, CurrentUser))
{
try
{
var item = table.LoadById(id, DBLoadParam.Load | DBLoadParam.Referencing, null, transaction);
if (item == null)
{
return(NotFound());
}
if (!(item.Access?.GetFlag(AccessType.Update, transaction.Caller) ?? true) &&
!(item.Access?.GetFlag(AccessType.Create, transaction.Caller) ?? true))
{
return(Forbid());
}
foreach (var upload in Upload())
{
if (string.IsNullOrEmpty(fileName) && !string.IsNullOrEmpty(upload.FileName))
{
fileName = upload.FileName;
}
item.SetValue(fileName, table.FileNameKey);
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);
}
transaction.Commit();
}
return(Ok());
}
catch (Exception ex)
{
transaction.Rollback();
return(BadRequest(ex));
}
}
}
protected async Task <UploadModel> Upload(bool inMemory)
{
var formAccumulator = new KeyValueAccumulator();
var result = new UploadModel();
var boundary = MultipartRequestHelper.GetBoundary(MediaTypeHeaderValue.Parse(Request.ContentType), formOptions.MultipartBoundaryLengthLimit);
var reader = new MultipartReader(boundary, HttpContext.Request.Body);
var section = (MultipartSection)null;
while ((section = await reader.ReadNextSectionAsync()) != null)
{
if (ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var contentDisposition))
{
if (MultipartRequestHelper.HasFileContentDisposition(contentDisposition))
{
result.FileName = contentDisposition.FileName.ToString();
if (inMemory)
{
result.Stream = new MemoryStream();
}
else
{
result.FilePath = Path.GetTempFileName();
result.Stream = System.IO.File.Create(result.FilePath);
}
await section.Body.CopyToAsync(result.Stream);
await result.Stream.FlushAsync();
}
else if (MultipartRequestHelper.HasFormDataContentDisposition(contentDisposition))
{
// Content-Disposition: form-data; name="key"
//
// value
// Do not limit the key name length here because the
// multipart headers length limit is already in effect.
var key = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
var encoding = 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;
}
formAccumulator.Append(key.ToString(), value);
if (formAccumulator.ValueCount > formOptions.ValueCountLimit)
{
throw new InvalidDataException($"Form key count limit {formOptions.ValueCountLimit} exceeded.");
}
}
}
}
}
return(result);
}
