public static BodyType?TryDetectFor(Head head, bool defaultNoBody)
{
// Reference: RFC 7320's 3.3.3
TransferEncoding encoding = TransferEncoding.Binary;
TransferCompression compression = TransferCompression.None;
ulong?contentLen = null;
if (head.Headers["Content-Length"] != null)
{
if (!ulong.TryParse(head.Headers["Content-Length"], out ulong len))
{
return(null);
}
contentLen = len;
}
if (head.Headers["Transfer-Encoding"] == null)
{
if (contentLen == null && defaultNoBody)
{
// 3.3.3.6
return(new BodyType(null, encoding = TransferEncoding.None, compression));
}
return(new BodyType(contentLen, encoding, compression));
}
string[] split = head.Headers["Transfer-Encoding"].Split(',');
for (int i = 0; i < split.Length; i++)
{
switch (split[i].Trim())
{
case "chunked":
if (contentLen != null)
{
return(null); // 3.3.3.3
}
encoding = TransferEncoding.Chunked;
break;
case "gzip":
if (compression != TransferCompression.None)
{
return(null);
}
compression = TransferCompression.Gzip;
break;
case "deflate":
if (compression != TransferCompression.None)
{
return(null);
}
compression = TransferCompression.Deflate;
break;
case "compress":
return(null); // not implemented
default: return(null); // unknown encoding
}
}
return(new BodyType(contentLen, encoding, compression));
}
public BodyType(ulong?length, TransferEncoding encoding, TransferCompression compression) : this()
{
Length = length;
Encoding = encoding;
Compression = compression;
}
