writing output after input in data streams

[Siddesh Kamat]

hello,
I am writing a console application to send multiple requests to the Northwest Airlines web server. As soon as I send a query string, I receive a page having a meta tag giving the url of the page where the request could be redirected. I am using the same urlConnection to first send my request, get the output from the server, then send back the query to the new url and get the page having the final result.
However, I am getting the following exception:
Exception in thread "main" java.net.ProtocolException: Cannot write output after reading input.
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
Can anybody help me out with how to take care of this,
Thanks,
Sid

[John Smith]

Exception in thread "main" java.net.ProtocolException: Cannot write output after reading input.
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)

Your connection object should be new for every request.
Eugene.

[Peter den Haan]

Yep, you need a new connection. Rest assured, though, that behind the scenes Java will use HTTP keepalive if possible.
- Peter

[Siddesh Kamat]

Hi Peter and Eugene,
Thanks a lot...
Sid

[Slamer Slamer]

Hi,
I'm already using an Http Tunneling between an applet and a servlet... All work fine without session tracking. Actually, I want to keep the session tracking between the both side. Unfortunately if I reset the connection for every request all the session information will be loosed!
Have you an idea to resolve that?
Thanks a lot,
Slamer

[yuanfu]

Originally posted by Slamer Slamer:
Hi,

I'm already using an Http Tunneling between an applet and a servlet... All work fine without session tracking. Actually, I want to keep the session tracking between the both side. Unfortunately if I reset the connection for every request all the session information will be loosed!
Have you an idea to resolve that?
Thanks a lot,
Slamer

i have the same problem.

frequent openConnection will affect performance?

anybody can tell me how to do the above question.

i need your help.

[Dorj Galaa]

Session id is stored in the cookie. after reset connection, you must send that cookie to the server