I have two salesforce orgs A and B. I am want to get all Account records there in B org in Org A. I written code REST API. Eevrything workig fine. But how to user pass: /services/data/v29.0/queryAll/?q=SELECT+Name+from+Account. this use this funciton in REST API.

Below is my Code:

public class W_RestInvoke_Account2c{
    public String result{set;get;}
    fromJSON d1 {set;get;}
   // JSON2Apex d2            {set;get;}
    public String d3        {set;get;}     
    public String accesstkn {set;get;}     
    Account accrec          {set;get;}

public String clientid ;  

public void show(){

    Http p =new Http();
    HttpRequest request=new HttpRequest();
    request.setEndpoint('https://login.salesforce.com/services/oauth2/token');
    request.setMethod('POST');
    request.setBody('grant_type=password&client_id=tw&client_secret=7925616023235447130&username=cxxxm&password=xxx' );
    HttpResponse res=p.send(request);
    result=res.getBody();
  //string tknAccesstoken = (String) res.getAttribute(ACCESS_TOKEN); 

        d1 = (fromJSON)JSON.deserialize(result, fromJSON.class);
accesstkn = d1.access_token;
system.debug('VENKATESH______-->fromJSONvalues:Y'+ accesstkn );


HttpRequest request1= new HttpRequest();
request1.setEndpoint('https://ap1.salesforce.com/services/apexrest/RestAccount2');
request1.setMethod('GET');      
request1.setHeader('Authorization','OAuth '+accesstkn);
request1.setHeader('q','/services/data/v29.0/queryAll/?q=SELECT+Name+from+Account');
HttpResponse response=p.send(request1);
result= ''+response.getBody();

 

public class fromJSON{
public String id;   
public String issued_at;    
public String token_type;   
public String instance_url; 
public String signature;    
public String access_token; 

}
}


Pls help me where can use this /services/data/v29.0/queryAll/?q=SELECT+Name+from+Account function?