If you don't have the time to do all of the homework which Thangamani's
solution requires and you are familiar with sockets then a simple socket
connection between the hub and outlying servers might meet your needs.
Ron Sigler
-----Original Message-----
From: A mailing list for discussion about Sun Microsystem's Java Servlet
API Technology. [mailto:[EMAIL PROTECTED]]On Behalf Of Craig
R. McClanahan
Sent: Wednesday, February 02, 2000 11:05 AM
To: [EMAIL PROTECTED]
Subject: Re: Servlet Communication
Thangamani RATHINAM wrote:
> Hello,
>
> Here is a situation for which I am designing a solution. I am designing a
> transaction server which is going to receive information from different
> servers and send the results back to them. So this is actually going to be
a
> server to server interaction. I am planning to use servlets, but my
> questions are:
>
> 1. How can they send information to me? (I would like them to send
me a
> form post, Is it possible? how would they do it from their server(not from
> browser)?)
>
If both servers are HTTP-based (such as both running servlets), you can have
the
first server call the second one by using the java.net.URLConnection class.
There
are examples of this kind of call in the Networking Trail of the Java
Language
Tutorial:
http://java.sun.com/docs/books/tutorial
For your case, you will need to make sure that your request to the second
server
conforms to the HTTP standards for how data is sent in a POST transaction.
This will
require you to understand the HTTP protocol. A good starting place is the
documents
at the World Wide Web consortium (http://www.w3c.org).
By the way, this same technique can be used from an applet to call a
servlet.
>
> 2. How can I send back the results (which will be a String) to
them? (If I
> send it as a html page, can they decode and process it?)
>
The response from your second server can be anything you want it to produce.
The
simplest case might be that the second server produces an HTML page (and
your first
server is acting like a proxy for it) -- all you need to do is copy all the
output
from the second server to the output stream of your first server. If the
second
server sends something different, you might have to translate -- it is all
up to how
you want to design things.
>
> I know this is a silly designing problem, but I would appreciate if
someone
> show me the right direction to proceed ;-)
>
> Thanks in advance.
>
> Tango.
>
Craig McClanahan
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