title: angular ngx-soap GET request
body: <p>I'm working on Angular 4. I want to get a method in XML from a soap web service and then I want get a function from web service that name is "sayHello", but I can't. </p>
  
  <pre><code>        // get wsdl content
          this.http.get('/address/test.wsdl', {responseType: 'text'}).subscribe(response =&gt; {
          if (response) {
              this.client = this.soap.createClient(response);
              console.log(response);
          }
          });
  </code></pre>
  
  <p>It just return me XML.
  I searched a lot but there was no answer.</p>