[Apex]: Changes in Exact Target Partner WSDL to include fueloauth in SOAP Envelope Header

Question

I want to retrieve data from Marketing Cloud Data Extension. Turns out there isn't any REST API for that. Retrieve Data from a Data Extension shows SOAP API can be used but there are no sample for apex. I have used Exact Target Partner WSDL to generate Apex class. Authenticate SOAP API describes the access token approach (fuelouath in header of soap envelope), it works fine with SoapUI. But there is no reference to the same in the generated Apex class.

The question in this link uses fueloauth header.

• What all changes are needed in the auto generated Apex class so as to authenticate using access token in Apex? Snippet from link.
• Any other way to authenticate from existing Apex class.

What all changes are needed in the auto generated Apex class so as to authenticate using access token in Apex? Snippet from link above.

ET_WSDL.Soap soapRequest = new ET_WSDL.Soap();
ET_WSDL.fueloauth header = new ET_WSDL.fueloauth();

header.fueloauth = 'MyAuthtoken';
soapRequest.HeaderFOAuth = header;

Your help is really appreciated. Thanks in advance.

Answer 1

According to Authenticate Your SOAP API Calls you want to include a fueloauth soap header in the request:

<soap:header>
  <fueloauth>YOUR_ACCESS_TOKEN</fueloauth>
</soap:header>

I've covered this more generically in Salesforce passing value in soap header.

Normally the WSDL would define how this header should be created and then the generated Apex code would include the classes and members to do so. I.e. the SoapBinding operations would include one or more <soap:header elements under the input elements to indicate which headers should be sent with each operation.

You can do so manually if required. However, one big challenge here is that the fueloauth header is a string literal rather than a wrapped document literal.

Try something like the following, but it is unlikely to create the correct header.

public class fueloauth_element {
     public string headerValue;
     private String[] headerValue_type_info = new String[]{'fueloauth','namespace','','1','1','false'};
     private String[] apex_schema_type_info = new String[]{'namespace','true','false'};
     private String[] field_order_type_info = new String[]{'headerValue'};
}

Then, in you port class (which includes the endpoint_x member:

public fueloauth_element fueloauth;
private String fueloauth_hns = 'fueloauth=namespace';

I'm doubtful that will work as it won't generate the required string literal. See Integrating Salesforce CRM to Exact Target.

Instead you could generate the raw Apex HttpRequest from the WSDL and then modify that as required to include the soap header.