protected async Task <UploadModel> Upload()
{
var formOptions = new FormOptions();
var result = new UploadModel();
result.Boundary = MultipartRequestHelper.GetBoundary(MediaTypeHeaderValue.Parse(Request.ContentType), formOptions.MultipartBoundaryLengthLimit);
var reader = new MultipartReader(result.Boundary, HttpContext.Request.Body);
var section = (MultipartSection)null;
while ((section = await reader.ReadNextSectionAsync()) != null)
{
if (ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var contentDisposition))
{
if (MultipartRequestHelper.HasFile(contentDisposition))
{
result.FileName = contentDisposition.FileName.ToString();
result.Stream = section.Body;
return(result);
}
else if (MultipartRequestHelper.HasModel(contentDisposition))
{
using (var factory = new DBItemConverterFactory(HttpContext))
{
var option = new JsonSerializerOptions();
option.InitDefaults(factory);
result.Model = await JsonSerializer.DeserializeAsync <T>(section.Body, option);
}
}
else if (MultipartRequestHelper.HasFormData(contentDisposition))
{
var key = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
var encoding = MultipartRequestHelper.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;
}
if (StringSegment.Equals(key, "LastWriteTime", StringComparison.OrdinalIgnoreCase) &&
DateTime.TryParseExact(value, "o", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind, out var lastWriteTime))
{
result.ModificationDate = lastWriteTime;
}
else
{
result.Content[key.ToString()] = value;
}
}
}
}
}
return(result);
}
public static void InitDefaults(this JsonSerializerOptions options, DBItemConverterFactory converter)
{
#if DEBUG
options.WriteIndented = true;
#endif
options.IgnoreNullValues = false;
options.IgnoreReadOnlyProperties = false;
options.DefaultBufferSize = 82 * 1024;
options.PropertyNamingPolicy = null;
options.Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping;
// Configure a converters.
//options.Converters.Add(new JsonStringEnumConverter());
options.Converters.Add(new TimeSpanConverter());
options.Converters.Add(converter);
}
public sealed override async Task WriteResponseBodyAsync(OutputFormatterWriteContext context, Encoding selectedEncoding)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (selectedEncoding == null)
{
throw new ArgumentNullException(nameof(selectedEncoding));
}
var httpContext = context.HttpContext;
httpContext.DisableBuffering();
var option = new JsonSerializerOptions();
using (var factory = new DBItemConverterFactory(httpContext))
{
option.InitDefaults(factory);
var objectType = context.Object?.GetType() ?? context.ObjectType ?? typeof(object);
if (TypeHelper.IsEnumerable(objectType))
{
var pipeWriter = httpContext.Response.BodyWriter;
await WriteArray(pipeWriter, (IEnumerable)context.Object, objectType, option);
await pipeWriter.FlushAsync();
}
else
{
var pipeWriter = httpContext.Response.BodyWriter;
using (var jsonWriter = CreatetWriter(pipeWriter, option))
{
JsonSerializer.Serialize(jsonWriter, context.Object, objectType, option);
}
await pipeWriter.FlushAsync();
}
}
}
public DBItemConverter(DBItemConverterFactory factory)
{
Factory = factory;
}