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415 Error When Adding a New List in VB.Net

SOLVED
Advisor

415 Error When Adding a New List in VB.Net

Hi, (Using VB.Net 2010)

I found an HttpWebRequest example for VB.Net here:
http://www.808.dk/?code-vbnet-httpwebrequest

I've copied the significant parts.

When I run it, I receive a "415 Unsupported Media Type" error on request.GetResponse()

Here is my code:

   Dim strURI As String = "https://api.constantcontact.com/ws/customers/mycustomername/lists"
   Dim strCredentials As String = strCC_AppKey & "%" & strCC_LoginName
   Dim strListsURI As New Uri(strURI)
   Dim strXML As String = GetCreateListXML()
   Dim request As HttpWebRequest = WebRequest.Create(strListsURI)

   request.Credentials = New NetworkCredential((strCredentials), strCC_Password)
   request.ContentType = "application/x-www-form-urlencoded"
   request.Method = "POST"

   Dim encoding As New Text.UTF8Encoding() 'Use UTF8Encoding for XML requests

   Dim postByteArray() As Byte = encoding.GetBytes(strXML)

   request.ContentLength = postByteArray.Length

   Dim postStream As IO.Stream = request.GetRequestStream()

   postStream.Write(postByteArray, 0, postByteArray.Length)

   postStream.Close()

   Dim response As HttpWebResponse = request.GetResponse()



The strXML string looks like this:

<entry xmlns="http://www.w3.org/2005/Atom">
  <id>http://api.constantcontact.com/ws/customers/cascadedsdev/lists</id>
  <title type="text">Contact Lists for Customer cascadedsdev</title>
  <author />
  <updated>2012-10-29</updated>
  <content type="application/vnd.ctct+xml">
    <ContactList xmlns="http://ws.constantcontact.com/ns/1.0/">
      <OptInDefault>true</OptInDefault>
      <Name>My New List</Name>
      <SortOrder>0</SortOrder>
    </ContactList>
  </content>
</entry>

I've reviewed the post that talks about the 415 error but I'm at a loss as to what the problem might be.  Everything looks correct

I would greatly appreciate any assistance.

Regards,

Chris

2 REPLIES 2
CTCT Employee

Re: 415 Error When Adding a New List in VB.Net

Hi Chris,

 

It looks like the issue is that you're setting the wrong content type to add a contact list.  You want to set your Content type to "application/atom+xml".

 

I hope that helps!

 

Best Regards,

Shannon W.

API Support Specialist.

Advisor

Re: 415 Error When Adding a New List in VB.Net

Thank you Shannon, that's exactly the problem.