Removing Request Headers & Cookies from HttpServletRequest

Question

I am trying to filter out (delete) some Request Headers and Cookies out of HttpServletRequest in one servlet, before forwarding the HttpServletRequest object to another servlet for processing.
I can easily get these i.e. "req.getHeader(name)". However I can't seem to find API's to set or delete request headers and cookies.
Does anybody know a technique I can use to do this?
Why aren't there API's to do such things as set and delete?
Thanks,
Art

Answer 1

Hi Schloth,
Is it not possible to read all the headers and
construct another list of headers without the cookie
header ?
Olabora.Yes it is possible. You can overload the getHeader() and filter out cookie. This is how I did it for getCookies(). YOu can do a similiar thing for getHeader().
public Cookie[] getCookies()
ArrayList cookieArrayList;
//Cookie[] retCookies;
String METHODNAME = "getCookies";
if(DEBUG)
{System.out.println(CLASSNAME+"."+METHODNAME+": Begin ");}
Cookie[] origCookies= super.getCookies();
//retCookies= null;
//Cookie[] retCookies = origCookies;
//Add to ArrayList for easy manipulation
//Do not add the SiteMinder cookie
if (origCookies != null)
if(DEBUG)
{System.out.println(CLASSNAME+"."+METHODNAME+" origCookies Array length= "+origCookies.length);}
cookieArrayList= new ArrayList();
for(int i=0; i<origCookies.length; i++)
//Filter out SMIDENTITY cookie
if (!origCookies.getName().equals("SMIDENTITY"))
cookieArrayList.add(origCookies[i]); //appends element to end of list
else
if(DEBUG)
{System.out.println(CLASSNAME+"."+METHODNAME+" Found SMIDENTITY cookie");}
if(DEBUG)
System.out.println(CLASSNAME+"."+METHODNAME+" cookieArrayList.size() "+cookieArrayList.size());
Cookie retCookies[] = new Cookie[cookieArrayList.size()];
retCookies=(Cookie[]) cookieArrayList.toArray(retCookies);
if(DEBUG)
System.out.println(CLASSNAME+"."+METHODNAME+" retCookies details");
printCookieDetails(retCookies);
return retCookies;
          if(DEBUG)
System.out.println(CLASSNAME+"."+METHODNAME+" 2 origCookies Array length= "+origCookies.length);
System.out.println(CLASSNAME+"."+METHODNAME+" returning ");
return origCookies;