/// <summary>
/// Transform an xml-document to a HttpContent request message that accords to the TNT spec.
/// It has to be application/x-www-form-urlencoded !
/// It has to contain one key-value pair, "xml_in" being the key and the whole xml-string the value (urlencoded of course).
/// The whole thing should be in UTF-8.
/// </summary>
/// <param name="xml">Xmldocument to send</param>
private HttpContent BuildWWWFormUrlEncoded(MyXMLDocument xml)
{
Byte[] bytes;
//First we get the xml to a stream... to make the XmlWriter believe it is boss of encoding (UTF-8)
using (MemoryStream ms = new MemoryStream())
{
xml.ToStream(ms, new UTF8Encoding(false, true), indent: true);
bytes = ms.ToArray(); //not exactly the streaming + async philosophy, but we have to do some strange stuff
}
//Then we get the stream into a bytes array to enable us to do URL-encoding
Byte[] bytes2 = HttpUtility.UrlEncodeToBytes(bytes);
//We create an un-encoded namevaluepair, with bytes2 als the value
string prolog = "xml_in=";
Byte[] bytes3 = Encoding.UTF8.GetBytes(prolog);
//Concatenate: bytes3 + bytes2
Byte[] bytes4 = new byte[bytes3.Length + bytes2.Length];
Buffer.BlockCopy(bytes3, 0, bytes4, 0, bytes3.Length);
Buffer.BlockCopy(bytes2, 0, bytes4, bytes3.Length, bytes2.Length);
//...all of this because we had to do URLEncoding at an unusual time, after writing the xml
HttpContent content = new ByteArrayContent(bytes4);
content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
return(content);
}
