How do I change the http version of my web method call to stop 505 error?

Question

I need to get some data from a service provider and have configured our .net app to point to their hosted web service to get the data. Using the code below, when the web method is called (ws.DoTransfer) I get the following error...

    private void DoTransferLocal()
    {
            Version version = new Version();
            string error = string.Empty;
            try
            {
                    RemoteService ws = new RemoteService();
                    ServicePoint spm = ServicePointManager.FindServicePoint(new Uri(ws.Url));
                    spm.Expect100Continue = true;
                    version = spm.ProtocolVersion;
                    ws.Credentials = credentials;
                    ws.PreAuthenticate = true;
                    RemoteResult result = ws.DoTransfer();
                    MessageBox.Show("Result = " + result.transferStatus);
            }
            catch (Exception ex)
            {
                    error = ex.Message;
            }
            finally
            {
                    MessageBox.Show(version.ToString() + Environment.NewLine + error);
            }
    }

Error:

The request failed with HTTP status 505: HTTP Version Not Supported.

I've been told that the version of the HTTP needs to be 1.0, but mine is 1.1

I've read a couple of google posts about this and have seen suggestions to override the GetWebRequest method as shown here...

    protected override System.Net.WebRequest GetWebRequest(Uri uri)
    {   
            System.Net.HttpWebRequest request = base.GetWebRequest(uri) as System.Net.HttpWebRequest;
            request.ProtocolVersion = System.Net.HttpVersion.Version10;
            return request;
    }

...but when I try this, the GetWebRequest after base. is underlined in red and has the error...

'Object' does not contain a definition for 'GetWebRequest'

Can anyone tell me how I change the HTTP version to 1.0, but still use similar code (rather than building up my own soap packets) to call my web method?

I can't seem to find any kind of code that I can simply inject into my code that looks like the following line...

    ws.HttpVersion = HttpVersion.Version10;

Thanks

score 11 · Answer 1 · answered Mar 07 '13 at 11:56

11

Change the Expect100Continue to false. You can do it in the config file of you app, adding the following:

<configuration>
    <system.net>
        <settings>
            <servicePointManager expect100Continue="false" />
        </settings>
    </system.net>
</configuration>

answered Mar 07 '13 at 11:56

Catalin S

130
1
4

This doesn't cause it to use HTTP 1.0, but it does allow AXL to work. – dodexahedron Jul 11 '14 at 16:21

score 4 · Answer 2 · edited Oct 11 '12 at 09:53

4

If you are unable to override GetWebRequest, you are using a WCF service and not a Soap web service. WCF does not support HTTP/1.0

To create a Web Service reference that will allow you to use the HTTP/1.0 protocol

Right click on project and select Add Service.
Click on the Advanced button
Click on the Add Web Reference

If you use the same namespace as before, no code changes should be required

edited Oct 11 '12 at 09:53

Rohit Vipin Mathews

11,629
15
57
112

answered Jul 17 '12 at 04:05

Chip Willman

41
2

I am having the same exact issue with Cisco AXL webservice. I have used wsdl.exe to compile teh *wsdl and *xsd files. I followed the steps above, but I can't point it to the wsdl file??!! It says access to path is denied, and I tried to run visaul studio as admin still no luck – laitha0 Jul 10 '13 at 20:11

How do I change the http version of my web method call to stop 505 error?

2 Answers2