/// <exception cref="Org.Apache.Http.HttpException"></exception>
public override long DetermineLength(HttpMessage message)
{
Args.NotNull(message, "HTTP message");
Header transferEncodingHeader = message.GetFirstHeader(HTTP.TransferEncoding);
// We use Transfer-Encoding if present and ignore Content-Length.
// RFC2616, 4.4 item number 3
if (transferEncodingHeader != null)
{
HeaderElement[] encodings;
try
{
encodings = transferEncodingHeader.GetElements();
}
catch (ParseException px)
{
throw new ProtocolException("Invalid Transfer-Encoding header value: " + transferEncodingHeader
, px);
}
// The chunked encoding must be the last one applied RFC2616, 14.41
int len = encodings.Length;
if (Sharpen.Runtime.EqualsIgnoreCase(HTTP.IdentityCoding, transferEncodingHeader.
GetValue()))
{
return Identity;
}
else
{
if ((len > 0) && (Sharpen.Runtime.EqualsIgnoreCase(HTTP.ChunkCoding, encodings[len
- 1].GetName())))
{
return Chunked;
}
else
{
return Identity;
}
}
}
Header contentLengthHeader = message.GetFirstHeader(HTTP.ContentLen);
if (contentLengthHeader != null)
{
long contentlen = -1;
Header[] headers = message.GetHeaders(HTTP.ContentLen);
for (int i = headers.Length - 1; i >= 0; i--)
{
Header header = headers[i];
try
{
contentlen = long.Parse(header.GetValue());
break;
}
catch (FormatException)
{
}
}
// See if we can have better luck with another header, if present
if (contentlen >= 0)
{
return contentlen;
}
else
{
return Identity;
}
}
return this.implicitLen;
}