AXIS2-5971 AxisServlet.processURLRequest uses content-type header instead of accept

Author: robertlazarski

modules/transport/http/src/main/java/org/apache/axis2/transport/http/AxisServlet.java

@@ -62,6 +62,7 @@
 import jakarta.servlet.http.HttpServlet;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
+import jakarta.ws.rs.core.HttpHeaders;
 import javax.xml.namespace.QName;
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
@@ -897,8 +898,16 @@ public void processXMLRequest() throws IOException, ServletException {
 
         public void processURLRequest() throws IOException, ServletException {
             try {
-                RESTUtil.processURLRequest(messageContext, response.getOutputStream(),
-                        request.getContentType());
+		// AXIS2-5971, content-type is not present on some
+		// types of REST requests that have no body and in 
+		// those cases use the 'accept' header if defined
+		final String accept = request.getHeader(HttpHeaders.ACCEPT);
+		final String contentType = request.getContentType();
+		if (contentType == null && accept != null) {
+                    RESTUtil.processURLRequest(messageContext, response.getOutputStream(), accept);
+		} else {
+                    RESTUtil.processURLRequest(messageContext, response.getOutputStream(), contentType);
+		}
                 this.checkResponseWritten();
             } catch (AxisFault e) {
                 setResponseState(messageContext, response);