Force - get PageRef text #vf #apex
PageReference pageRef = Page.CEP_GenerateSrf;
pageRef.getParameters().put(CEP_Constants.URL_PARAM_SID, 'a0eU0000005MkPEIA0');
pageRef.getParameters().put(CEP_Constants.URL_PARAM_PNAME, 'a0LU0000006YOYi');
String strHtml = pageRef.getContent().toString();
system.debug(strHtml);