private async Task <string> UploadPayloadsWith(MultipartPayloadReader reader)
{
string payloadId = Guid.NewGuid().ToString();
await reader.StartReading(
async payload => payloadId = await _payloadPersistor.SavePayload(payload));
return(payloadId);
}
private static async Task <MultipartPayloadReader> CreateStubReaderThatReturns(string expectedContent, Stream actualStream)
{
using (Stream contentStream = expectedContent.AsStream())
{
var multipartContent = new MultipartFormDataContent {
{ new StreamContent(contentStream), "name", "filename" }
};
await multipartContent.CopyToAsync(actualStream);
actualStream.Position = 0;
return(MultipartPayloadReader.TryCreate(
actualStream, multipartContent.Headers.ContentType.ToString()).Item2);
}
}
public async Task <IActionResult> Upload()
{
(bool success, MultipartPayloadReader reader)result = MultipartPayloadReader.TryCreate(Request.Body, Request.ContentType);
if (!result.success)
{
return(BadRequest($"Expected a multipart request, but got {Request.ContentType}"));
}
string payloadId = await UploadPayloadsWith(result.reader);
string downloadUrl = FormatWithDownloadUrl(payloadId);
return(new OkObjectResult(new UploadResult(payloadId, downloadUrl)));
}
public async Task ReadsExpectedContent()
{
// Arrange
const string expectedContent = "message data!";
using (var actualStream = new MemoryStream())
{
MultipartPayloadReader reader = await CreateStubReaderThatReturns(expectedContent, actualStream);
var waitHandle = new ManualResetEvent(initialState: false);
// Act
await reader.StartReading(payload =>
{
// Assert
Assert.Equal(expectedContent, payload.DeserializeContent());
waitHandle.Set();
return(Task.CompletedTask);
});
Assert.True(waitHandle.WaitOne(timeout: TimeSpan.FromSeconds(1)));
}
}
public void CannotCreateReader_IfContentTypeIsntMultiPart()
{
Assert.False(MultipartPayloadReader.TryCreate(Stream.Null, "application/json").Item1);
}