/// <summary>
/// Processes the SOAP Messages and compresses them if necessary
/// </summary>
/// <param name="envelope">The <see cref="SoapEnvelope"/> to process.</param>
public override void ProcessMessage(SoapEnvelope envelope)
{
if (!enabled)
{
return;
}
//add an attribute to specify that the filter has been applied on this envelope.
XmlElement soapHeader = envelope.CreateHeader();
if (envelope.Body.InnerText.Length < minFilterSize)
{
return;
}
else
{
soapHeader.AppendChild(CreateCustomHeader(soapHeader, "1"));
}
//compress the body element.
MemoryStream result = new MemoryStream(WSCFCompression.Compress(Encoding.UTF8.GetBytes(envelope.Body.InnerXml)));
//Attach zipped result to the envelope.
Microsoft.Web.Services2.Attachments.Attachment attch = new Microsoft.Web.Services2.Attachments.Attachment("APPLICATION/OCTET-STREAM", result);
envelope.Context.Attachments.Add(attch);
//remove old body.
XmlElement newBody = envelope.CreateBody();
newBody.RemoveAll();
envelope.SetBodyObject(newBody);
GC.Collect();
}
/// <summary>
/// Processes the SOAP Messages and decompresses them if necessary
/// </summary>
/// <param name="envelope">The <see cref="SoapEnvelope"/> to process.</param>
public override void ProcessMessage(SoapEnvelope envelope)
{
if (envelope.Header == null)
{
return;
}
//check if the ZipFilter has been applied.
XmlNodeList elemList = envelope.Header.GetElementsByTagName(Constants.WSCFCompressionElement);
if (elemList.Count == 0)
{
return;
}
//The header contains the element, let's check if the body is compressed
if (elemList[0].Attributes[Constants.WSCFAttribute].Value.Equals("0"))
{
return;
}
//make sure we decompress using the same method we used for compression.
WSCFCompression.CompressionProvider = (CompressionType)Convert.ToInt32((string)elemList[0].Attributes[Constants.WSCFTypeAttribute].Value);
//remove the element from the envelope, it's no longer necessary.
envelope.Header.RemoveChild(elemList[0]);
//decompress the envelope attachments
MemoryStream outStream = WSCFCompression.DeCompressToStream(envelope.Context.Attachments[0].Stream);
//replace the body element.
XmlElement body = envelope.CreateBody();
body.InnerXml = System.Text.Encoding.UTF8.GetString(outStream.ToArray());
GC.Collect();
}
