Andreas Hartmann wrote:
Bart Busschots wrote:
Hi Andreas,
Like any other web server a Java based web server use the Common Gateway
Interface (or CGI) for sending information between the client and the
server. This is a request-response protocol which is driven by the
client and not the server. What you are trying to do is have the server
push information to the client and ask the client for information when
the server wants it.
What I'd like to do is:
Client starts an application, which begins to run and sending output. This
output is parsed and formated by the webserver before it is sended. If
there is a request for an user, there will be some input-forms created, so
the user can react. Meanwhile, struts has to hold the application running
(waiting for input) in the background, while the user responds to the
questions. This should be best cgi: Browser started a request and it got
an answer on which the user responds with a request again. And so on.
The tricky question is:
Can struts send data to the client (after they have been requested from
the client), during they are produced or begins the sending of data when
all data is existing which is to send? Which classes could be used best to
reach this approach? Is it possible to achieve this behavior with the
action-class?
I really don't think Java is a good language for this kind of thing.
Shelling out from Java is messy and not really that powerful from my
experience. I don't know of any mechanism in Java for interacting with
another process in the way you are looking for. My gut feeling would be
that Perl is a better language for this kind of thing.
I thought about an applet too, but this seems to be very expensive for now.
How do you mean "expensive"?
Bart.
Kind regards,
Andreas Hartmann
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