private static MidFunc AppendStream(StreamResource stream) =>
async(context, next) =>
{
var operation = await AppendStreamOperation.Create(context.Request, context.RequestAborted);
var response = await stream.Post(operation, context.RequestAborted);
await context.WriteResponse(response);
};
public async Task <Response> Post(
AppendStreamOperation operation,
CancellationToken cancellationToken)
{
if (operation.ExpectedVersion < Constants.Headers.MinimumExpectedVersion)
{
return(new HalJsonResponse(new HALResponse(new
{
type = typeof(WrongExpectedVersionException).Name,
title = "Wrong expected version.",
detail =
$"Expected header '{Constants.Headers.ExpectedVersion}' to have an expected version => {ExpectedVersion.NoStream}."
}),
400));
}
var result = await operation.Invoke(_streamStore, cancellationToken);
var links = Links
.FromOperation(operation)
.Index()
.Find()
.Browse()
.Add(Constants.Relations.Feed, LinkFormatter.Stream(operation.StreamId)).Self();
var response = new HalJsonResponse(
new HALResponse(result)
.AddLinks(links),
operation.ExpectedVersion == ExpectedVersion.NoStream
? 201
: 200);
if (response.StatusCode == 201)
{
response.Headers[Constants.Headers.Location] =
new[] { $"{_relativePathToRoot}{LinkFormatter.Stream(operation.StreamId)}" };
}
return(response);
}