Problem with cookies

[Joan Balaguero]

Hello,

 

I’m having an strange problem with some “lost” cookies.

 

I’ve developed a small test program that sends a get request to
http://www.viajeselcorteingles.es/viajes/vuelos_hoteles/programas/listado_ho
teles.asp?codwebor=ESP
<http://www.viajeselcorteingles.es/viajes/vuelos_hoteles/programas/listado_h
oteles.asp?codwebor=ESP&paquetesDinamicos=N&descuentoResid=N&copagina=NAC&fo
lleto=&codPais=CAT&codiArea=BCN&descripcion=Barcelona&codiZona=&fechaIni=201
21114&fechaFin=20121115&numHabit=1&numAdultos1=2>
&paquetesDinamicos=N&descuentoResid=N&copagina=NAC&folleto=&codPais=CAT&codi
Area=BCN&descripcion=Barcelona&codiZona=&fechaIni=20121114&fechaFin=20121115
&numHabit=1&numAdultos1=2

 

and prints the response cookies:

Set-Cookie = VIAJESES=r3238671101; path=/; expires=Fri, 1 Jan 2016 01:01:50
GMT

Set-Cookie = session%2Did=03048646336583665; Path=/

Set-Cookie = ASPSESSIONIDSSSRTCDT=FEIIKPMAOMGEIFPHGGIBMIAJ; Path=/

 

If I execute the same get N times, I receive the same cookies N times.

 

But when I send the get request through my http proxy (developed by me),
adding these lines of code:

  HttpHost proxy = new HttpHost("95.17.8.174", 8051, "http");

  objHttp.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);

 

the first time I perform the get request, I get the same cookies (with
different values):

set-cookie = VIAJESES=r235171774; path=/; expires=Fri, 1 Jan 2016 01:01:50
GMT

set-cookie = session%2Did=049851416475118569; Path=/

set-cookie = ASPSESSIONIDQQSDTTAA=PBIIAIJBNOPOFDEJKGCIICFP; Path=/

 

But in the next executions, some cookies are lost. Below the “session%2Did”
cookie does not appear:

set-cookie = VIAJESES=r235171774; path=/; expires=Fri, 1 Jan 2016 01:01:50
GMT

set-cookie = ASPSESSIONIDCADDAQTT=GCHGNBPDPFHEIABIODPLPCCP; Path=/

 

And in this execution, only the first cookie is received:

set-cookie = VIAJESES=r235171774; path=/; expires=Fri, 1 Jan 2016 01:01:50
GMT

 

Then, I stop Tomcat (where my proxy servlet is running) and I see the
following messages:

30-sep-2012 23:32:48 org.apache.catalina.loader.WebappClassLoader
clearThreadLocalMap

GRAVE: The web application [] created a ThreadLocal with key of type
[org.apache.http.impl.cookie.DateUtils$DateFormatHolder$1] (value
[org.apache.http.impl.cookie.DateUtils$DateFormatHolder$1@63a9ab54]) and a
value of type [java.lang.ref.SoftReference] (value
[java.lang.ref.SoftReference@182f4aea]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.

 

When Tomcat is started again, I repeat the sequence and get the same result:
with the first execution I get the 3 cookies, and in next executions I
always lose “session%2Did” and, sometimes, also “ASPSESSIONID…..”. In fact,
just the first execution after a Tomcat restart shows the 3 cookies.

 

After spending days and days trying to find out what’s going on, I’ve seen
the problem. If I create a new HttpClient every time I perform a request,
works OK. If I create an HttpClient in the servlet init method, and
subsequent gets are performed using the same instance of HttpClient, then it
doesn’t work.

 

This is the servlet:

 

public class ProxyServletTest extends HttpServlet

{

private static final long serialVersionUID = -1597058980193608683L;

private DefaultHttpClient objHttp;

 

public void init() { this.objHttp = new DefaultHttpClient(); }

 public void service(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException

{

  HttpResponse httpresponse = null;     

 

  try

  {      

   this.objHttp   = new DefaultHttpClient();  <--- If I add this line,
works.

   HttpGet objGet = new
HttpGet(request.getRequestURL().append("?").append(request.getQueryString())
.toString());

   httpresponse   = this.objHttp.execute(objGet);

 

   HeaderIterator it = httpresponse.headerIterator();

            

   while (it.hasNext())

   {

    Header h = it.nextHeader();

    

    System.out.println(h.getName() + " = " + h.getValue());

    response.addHeader(h.getName(), h.getValue());

   }

  }

  finally 

  { 

   EntityUtils.consume(httpresponse.getEntity()); 

  }

}

}

 

Could anybody tell me what’s wrong?

 

Thanks in advance,

 

Joan.