On 3/18/2017 9:59 PM, Oleg Kalnichevski wrote:
On Sat, 2017-03-18 at 14:58 +0000, Farzad Mahdikhani wrote:
I am using a CloseableHttpClient which uses a
PoolingHttpClientConnectionManager in a web application, I mean a
multi-threaded application with different users, in a state-less way
or request-response way. The server at the other hand, a load
balancer in front of 10 servers which I don’t have control over it,
sends a JSESSIONID in response. Now, the problem is that the
JSESSIONID sent by the server is kept by HttpClient and used at the
future requests. When this happens, the load balancer redirects every
request to the first server, i.e., the creator of the session id
which is not appropriate for me and I want other servers to be used
by the load balancer for other requests (balance the load among the
servers).
I could ignore JSESSIONID sent in response by disabling cookies using
setCookieSpec(CookieSpecs.IGNORE_COOKIES) when creating RequestConfig
object but I don’t know the side effects of this. Actually I am
afraid of messing responses for the requests in different threads of
application when ignoring JSESSIONID. In other words, is it
guaranteed that when I execute for example
httpclient.execute(httpPost, responseHandler) in a thread, the
response is returned to that thread/user?
Yes, it is.
I am using HttpClient 4.5.2 and as I mentioned above I don’t need
JSESSIONID sent by the server as I want a state-less request-response
behavior here.
You could consider creating a custom filter that automatically drops
JSESSIONID cookie header or evicts JSESSIONID cookie from the cookie
store.
Oleg
Thank you very much Oleg but two points.
First, I couldn't find how to create request filter or response filter
and add them to request or response for HttpClient by googling. Is there
any documentation on this?
Second, why not use setCookieSpec(CookieSpecs.IGNORE_COOKIES) to ignore
the cookies? Is it because we want to omit the JSESSIONID cookie and not
the other cookies (which is completely reasonable)?
Ferez
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