public class JSONWrapper{
   
    public cls_result[] result{get;set;}
    class cls_result {
        public String parent{get;set;}   //
        public String made_sla{get;set;} //true
        public String caused_by{get;set;}    //
        public String watch_list{get;set;}   //
        public String upon_reject{get;set;}  //cancel
        public String sys_updated_on{get;set;}   //2017-06-20 07:52:14
        public String child_incidents{get;set;}  //0
        public String hold_reason{get;set;}  //
        public String approval_history{get;set;} //
        public String number1{get;set;}   //5002800000m9AD4AAM
        public String resolved_by{get;set;}  //
        public String sys_updated_by{get;set;}   //admin
        public cls_opened_by opened_by{get;set;}
        public String user_input{get;set;}   //
        public String sys_created_on{get;set;}   //2017-06-20 07:52:14
        public cls_sys_domain sys_domain{get;set;}
        public String state{get;set;}    //1
        public String sys_created_by{get;set;}   //admin
        public String knowledge{get;set;}    //false
        public String order{get;set;}    //
        public String calendar_stc{get;set;} //
        public String closed_at{get;set;}    //
        public String cmdb_ci{get;set;}  //
        public String delivery_plan{get;set;}    //
        public String impact{get;set;}   //3
        public String active{get;set;}   //true
        public String work_notes_list{get;set;}  //
        public String business_service{get;set;} //
        public String priority{get;set;} //5
        public String sys_domain_path{get;set;}  ///
        public String rfc{get;set;}  //
        public String time_worked{get;set;}  //
        public String expected_start{get;set;}   //
        public String opened_at{get;set;}    //2017-06-20 07:52:14
        public String business_duration{get;set;}    //
        public String group_list{get;set;}   //
        public String work_end{get;set;} //
        public cls_caller_id caller_id{get;set;}
        public String resolved_at{get;set;}  //
        public String approval_set{get;set;} //
        public String subcategory{get;set;}  //
        public String work_notes{get;set;}   //
        public String short_description{get;set;}    //This is test incident created from salesforce CRM
        public String close_code{get;set;}   //
        public String correlation_display{get;set;}  //
        public String delivery_task{get;set;}    //
        public String work_start{get;set;}   //
        public String assignment_group{get;set;} //
        public String additional_assignee_list{get;set;} //
        public String business_stc{get;set;} //
        public String description{get;set;}  //
        public String calendar_duration{get;set;}    //
        public String close_notes{get;set;}  //
        public String notify{get;set;}   //1
        public String sys_class_name{get;set;}   //incident
        public String closed_by{get;set;}    //
        public String follow_up{get;set;}    //
        public String parent_incident{get;set;}  //
        public String sys_id{get;set;}   //b2472d10db23320085fe72ffbf961960
        public String contact_type{get;set;} //
        public String incident_state{get;set;}   //1
        public String urgency{get;set;}  //3
        public String problem_id{get;set;}   //
        public cls_company company{get;set;}
        public String reassignment_count{get;set;}   //0
        public String activity_due{get;set;} //
        public String assigned_to{get;set;}  //
        public String severity{get;set;} //3
        public String comments{get;set;} //
        public String approval{get;set;} //not requested
        public String sla_due{get;set;}  //
        public String comments_and_work_notes{get;set;}  //
        public String due_date{get;set;} //
        public String sys_mod_count{get;set;}    //0
        public String reopen_count{get;set;} //0
        public String sys_tags{get;set;} //
        public String escalation{get;set;}   //0
        public String upon_approval{get;set;}    //proceed
        public String correlation_id{get;set;}   //
        public String location{get;set;} //
        public String category{get;set;} //inquiry
    }
    class cls_opened_by {
        public String link{get;set;} 
        public String value{get;set;}  
    }
    class cls_sys_domain {
        public String link{get;set;} 
        public String value{get;set;}    
    }
    class cls_caller_id {
        public String link{get;set;} 
        public String value{get;set;}   
    }
    class cls_company {
        public String link{get;set;} 
        public String value{get;set;}    
    }
    public List<JSONWrapper> parse(String json){
        return (List<JSONWrapper>) System.JSON.deserialize(json, List<JSONWrapper>.class);
        
        
    }

    
}

public class ServiceNowCntrl {
    
    public string bodyText{get;set;}
    public ServiceNowCntrl (){
    doInit();
    }
    public void doInit(){
           
        try{
        
        string user='xxx';
        
        string password='xxxxxxxx';
        
        HttpRequest request = new HttpRequest();

        request.setEndpoint('https://dev18687.service-now.com/api/now/table/incident?sysparm_limit=10');

        Blob auth = Blob.valueOf(user+':'+password);

        System.debug('Auth: '+ auth);

        String authorizationHeader = 'BASIC ' + EncodingUtil.base64Encode(auth);
        
        request.setMethod('GET');
 
        request.setHeader('Authorization', authorizationHeader);
       
        request.setHeader('Content-Type', 'application/json;charset=UTF-8');
        
            Http http = new Http();
            HttpResponse res = new HttpResponse();

            res = http.send(request);
            system.debug(res.getBody());
            bodyText=res.getBody();
            
           JSONWrapper jw=new JSONWrapper();
           list<JSONWrapper> jwList=new List<JSONWrapper>();
           jwList=jw.parse(bodyText);

        }catch(System.CalloutException e){
            System.debug('Erro: '+ e.getMessage());
        }
        
    }
    
}