public static long?GetContentLength(HeaderDictionary headers)
{
const NumberStyles styles = NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite;
long value;
string rawValue = headers.Get(HeaderNames.ContentLength);
if (!string.IsNullOrWhiteSpace(rawValue) &&
long.TryParse(rawValue, styles, CultureInfo.InvariantCulture, out value))
{
return(value);
}
return(null);
}
public async Task <FormCollection> ReadFormAsync(CancellationToken cancellationToken)
{
if (Form != null)
{
return(Form);
}
if (!HasFormContentType)
{
throw new InvalidOperationException("Incorrect Content-Type: " + _request.ContentType);
}
cancellationToken.ThrowIfCancellationRequested();
_request.EnableRewind();
IDictionary <string, string[]> formFields = null;
var files = new FormFileCollection();
// Some of these code paths use StreamReader which does not support cancellation tokens.
//using (cancellationToken.Register(_request.HttpContext.Abort))
//{
var contentType = ContentType;
// Check the content-type
if (HasApplicationFormContentType(contentType))
{
var encoding = FilterEncoding(contentType.Encoding);
formFields = await FormReader.ReadFormAsync(_request.Body, encoding, cancellationToken);
}
else if (HasMultipartFormContentType(contentType))
{
var formAccumulator = new KeyValueAccumulator <string, string>(StringComparer.OrdinalIgnoreCase);
var boundary = GetBoundary(contentType);
var multipartReader = new MultipartReader(boundary, _request.Body);
var section = await multipartReader.ReadNextSectionAsync(cancellationToken);
while (section != null)
{
var headers = new HeaderDictionary(section.Headers);
ContentDispositionHeaderValue contentDisposition;
ContentDispositionHeaderValue.TryParse(headers.Get(HeaderNames.ContentDisposition), out contentDisposition);
if (HasFileContentDisposition(contentDisposition))
{
// Find the end
await section.Body.DrainAsync(cancellationToken);
var file = new FormFile(_request.Body, section.BaseStreamOffset.Value, section.Body.Length)
{
Headers = headers,
};
files.Add(file);
}
else if (HasFormDataContentDisposition(contentDisposition))
{
// Content-Disposition: form-data; name="key"
//
// value
var key = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
MediaTypeHeaderValue mediaType;
MediaTypeHeaderValue.TryParse(headers.Get(HeaderNames.ContentType), out mediaType);
var encoding = FilterEncoding(mediaType != null ? mediaType.Encoding : null);
using (var reader = new StreamReader(section.Body, encoding, detectEncodingFromByteOrderMarks: true, bufferSize: 1024, leaveOpen: true))
{
var value = await reader.ReadToEndAsync();
formAccumulator.Append(key, value);
}
}
else
{
System.Diagnostics.Debug.Assert(false, "Unrecognized content-disposition for this section: " + headers.Get(HeaderNames.ContentDisposition));
}
section = await multipartReader.ReadNextSectionAsync(cancellationToken);
}
formFields = formAccumulator.GetResults();
}
//}
Form = new FormCollection(formFields, files);
return(Form);
}