Hi,

I have a requirement to write an apex web service which accepts attachments and creates the same in SFDC. My question is, is it possible to create a webservice which allows the source system to send the attachment data through SOAP header? 

To elaborate my point, please refer to the Apex class below:
global class createAttachment{
webservice static String createAttachment(String parent, List<MultipleAttachments> multiAtt )
    {
        try
        {
            Id parentRecordId=Id.ValueOf(parent);
            List<Attachment> listAtt = new List<Attachment>();
           
            for(MultipleAttachments at : multiAtt)
            {
                Attachment att = new Attachment();
                att.Name=at.title;
                att.Body=EncodingUtil.base64Decode(at.content);//at.content;
                att.ContentType=at.ContentType;
                att.parentId=parentRecordId;
                listAtt.add(att);
            }
           
            insert listAtt; 
        }
        catch(Exception e)
        {
            system.debug('Exception--> '+e.getMessage());
        }
        return 'Yes!!!';
    }
   
    global class MultipleAttachments
    {
        webservice String title {get;set;}
        webservice String contentType {get;set;}
        webservice String content {get;set;}
    }
}

The generated WSDL from this apex class allows to send the attachment data through SOAP body. This works fine when used from SOAP UI. But if I want to send the same through SOAP header, is it possible to implement? Any pointers would be helpful.

Thanks!