The Cookie jar's lid seems stuck

[Q Beukes]

Hey,

Due to our search engine for one of our sites being hosted on a
separate domain, we can't do AJAX requests to the original domain.
This isn't much of a problem, as I figured I'd just use HttpClient to
make a servlet which is a proxy to the Apache server.

So... to ensure session state is still maintained, which is a
requirement, I will just proxy the cookies the client sends me as
well.

I made the following method (the connection manager and parameters are
final static members of the class):

  private HttpEntity proxyRequest(String baseUrl, String
getParameters, Cookie[] cookies) throws Exception
  {
    DefaultHttpClient httpClient = new DefaultHttpClient(connManager,
httpParams);
    HttpContext context = new BasicHttpContext(httpClient.getDefaultContext());
    HttpGet request = new HttpGet(baseUrl + basketUri);
    CookieStore cookieStore = httpClient.getCookieStore();

    for (Cookie c : cookies)
    {
      BasicClientCookie newCookie = new BasicClientCookie(c.getName(),
c.getValue());
      newCookie.setDomain(c.getDomain());
      newCookie.setPath(c.getPath());
      newCookie.setComment(c.getComment());
      if (c.getMaxAge() > 0)
      {
        long expiryTime = new Date().getTime() + c.getMaxAge();
        newCookie.setExpiryDate(new Date(expiryTime));
      }
      cookieStore.addCookie(newCookie);
    }

    HttpResponse response = httpClient.execute(request, context);
    HttpEntity entity = response.getEntity();

    if (entity == null)
    {
      throw new NoHttpResponseException("Basket request failed to
return a response.");
    }

    return entity;
  }

The Cookie[] I pass in, is an array of cookies are received by
HttpServletRequest.getCookies().

I stepped the code, and the addCookie() method is definitely being
called. When recieving the response on the other side, I make a dump
of all received cookies to the output. This output is received by
HttpClient and returned to the servlet's output stream.

Then what I'm getting is a dump of "0" cookies. So the request is
successful, but the cookies added to the store is not being sent to
the client.

Can anyone see what I'm doing wrong?

--
Quintin Beukes

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[olegk]

On Wed, 2008-07-02 at 11:59 +0200, Quintin Beukes wrote:

> Hey,
>
> Due to our search engine for one of our sites being hosted on a
> separate domain, we can't do AJAX requests to the original domain.
> This isn't much of a problem, as I figured I'd just use HttpClient to
> make a servlet which is a proxy to the Apache server.
>
> So... to ensure session state is still maintained, which is a
> requirement, I will just proxy the cookies the client sends me as
> well.
>
> I made the following method (the connection manager and parameters are
> final static members of the class):
>
>   private HttpEntity proxyRequest(String baseUrl, String
> getParameters, Cookie[] cookies) throws Exception
>   {
>     DefaultHttpClient httpClient = new DefaultHttpClient(connManager,
> httpParams);
>     HttpContext context = new BasicHttpContext(httpClient.getDefaultContext());
>     HttpGet request = new HttpGet(baseUrl + basketUri);
>     CookieStore cookieStore = httpClient.getCookieStore();
>
>     for (Cookie c : cookies)
>     {
>       BasicClientCookie newCookie = new BasicClientCookie(c.getName(),
> c.getValue());
>       newCookie.setDomain(c.getDomain());
>       newCookie.setPath(c.getPath());
>       newCookie.setComment(c.getComment());
>       if (c.getMaxAge() > 0)
>       {
>         long expiryTime = new Date().getTime() + c.getMaxAge();
>         newCookie.setExpiryDate(new Date(expiryTime));
>       }
>       cookieStore.addCookie(newCookie);
>     }
>
>     HttpResponse response = httpClient.execute(request, context);
>     HttpEntity entity = response.getEntity();
>
>     if (entity == null)
>     {
>       throw new NoHttpResponseException("Basket request failed to
> return a response.");
>     }
>
>     return entity;
>   }
>
> The Cookie[] I pass in, is an array of cookies are received by
> HttpServletRequest.getCookies().
>
> I stepped the code, and the addCookie() method is definitely being
> called. When recieving the response on the other side, I make a dump
> of all received cookies to the output. This output is received by
> HttpClient and returned to the servlet's output stream.
>
> Then what I'm getting is a dump of "0" cookies. So the request is
> successful, but the cookies added to the store is not being sent to
> the client.
>
> Can anyone see what I'm doing wrong?
>

Quintin,

Adding cookies to the cookie store is just a part of the story. A cookie
need to match the origin server in order to be included in subsequent
HTTP requests. Apparently there is something wrong with the domain or
the expiry date.

Take a look at the RequestAddCookies protocol interceptor

Hope this helps

Oleg


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