/// <summary>Returns a new ProcessRequestOverride func which will take the request, parse it as batch,
/// unwrap the first part from it and run the passed in func on it, then wrapping the response in batch again.</summary>
/// <param name="partProcessRequest">The func to run on the single part in the batch</param>
public static Func <InMemoryWebRequest, InMemoryWebRequest> UnwrapSingleBatchPart(Func <InMemoryWebRequest, InMemoryWebRequest> partProcessRequest)
{
return((request) =>
{
var batch = BatchWebRequest.FromRequest(request);
if (batch.Parts.Count > 1 || (batch.Parts.Count == 0 && (batch.Changesets.Count != 1 || batch.Changesets[0].Parts.Count != 1)))
{
throw new Exception("The batch has more than one part in it.");
}
IList <InMemoryWebRequest> parts = null;
if (batch.Parts.Count > 0)
{
parts = batch.Parts;
}
else
{
parts = batch.Changesets[0].Parts;
}
var part = parts[0];
string contentId;
part.RequestHeaders.TryGetValue("Content-ID", out contentId);
parts.Clear();
part = partProcessRequest(part);
part.ResponseHeaders["Content-ID"] = contentId;
parts.Add(part);
var response = new InMemoryWebRequest();
batch.WriteResponse(response);
return response;
});
}
