Question

I have a problem with message parsing on WCF service.
I ran server-side of WCF application. Another company sends me such HTTP POST request:

POST /telemetry/telemetryWebService HTTP/1.1
Host: 192.168.0.160:12123
Content-Length: 15870
Expect: 100-continue
Connection: Keep-Alive

<?xml version="1.0" encoding="utf-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Header>
    <wsse:Security> ... </wsse:Security>
  </soapenv:Header>
<soapenv:Body>
...
</soapenv:Body>
</soapenv:Envelope>

How you can see this in this HTTP request missing 2 important headers: Soap Action and Content-type.That’s why my service cannot process this request correctly.

I need to catch the request until it starts to be processed and manually add these headers.

I’ve already tried IDispatchMessageInspector, but whithout any result.

Answer 1

Thank you all.

1) You need to create you own custom message encoder, where you can create the Content-type by default. Yщu can read it here with examples.

2) You need to create custom message filter because you need to skip messages without SoapAction

public class CustomFilter : MessageFilter
{
    private int minSize;
    private int maxSize;
    public CustomFilter()
        : base()
    {

    }
    public CustomFilter(string paramlist)
        : base()
    {
        string[] sizes = paramlist.Split(new char[1] { ',' });
        minSize = Convert.ToInt32(sizes[0]);
        maxSize = Convert.ToInt32(sizes[1]);
    }
    public override bool Match(System.ServiceModel.Channels.Message message)
    {
        return true;
    }
    public override bool Match(MessageBuffer buffer)
    {
        return true;
    }
}

3) You need to create custom message selector for assigning incoming messages to operations. Cybermaxs‘s example is very good.