/// <summary>
/// ProcessFormFileAsync
/// </summary>
/// <param name="formFile"></param>
/// <param name="permittedFileSuffixes"></param>
/// <param name="sizeLimit"></param>
/// <returns></returns>
/// <exception cref="ApiException"></exception>
public async Task <byte[]> ProcessFormFileAsync(IFormFile?formFile, string[] permittedFileSuffixes, long sizeLimit)
{
// Check the file length. This check doesn't catch files that only have
// a BOM as their content.
if (formFile == null || formFile.Length == 0 || permittedFileSuffixes.IsNullOrEmpty())
{
throw ApiExceptions.ApiUploadEmptyFile();
}
if (formFile.Length > sizeLimit)
{
throw ApiExceptions.ApiUploadOverSize();
}
try
{
using MemoryStream memoryStream = new MemoryStream();
await formFile.CopyToAsync(memoryStream).ConfigureAwait(false);
// Check the content length in case the file's only
// content was a BOM and the content is actually
// empty after removing the BOM.
if (memoryStream.Length == 0)
{
throw ApiExceptions.ApiUploadEmptyFile();
}
if (!IsValidFileExtensionAndSignature(
formFile.FileName, memoryStream, permittedFileSuffixes))
{
throw ApiExceptions.ApiUploadWrongType();
}
else
{
return(memoryStream.ToArray());
}
}
catch (Exception ex)
{
throw ApiExceptions.ServerUnkownError(fileName: formFile.FileName, innerException: ex);
}
}