Hi, Nic, thanks a lot for your clear explanation. What I did is using
URLConnection to talk to
the other servlet. But my friend (who is partly my boss and will use the
programs:-)) said it's
not reliable nor safe to use http connection because the information
transferred is some secure
message. Any way to make sure it is secure?
Thanks...
Liwen
----- Original Message -----
From: "Nic Ferrier" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, May 16, 2000 7:22 PM
Subject: Re: is out.flush() or out.close() necessary ?
> >>> Liwen Chen <[EMAIL PROTECTED]> 16-May-00 7:32:18 AM >>>
>
> >I got a problem. It's some sense off-topic,
> >but the problem comes out from a servlet problem.
>
> This is on-topic. It's about servlets - that's the subject of
> discussion here /8->
>
>
> >Below is the problem:
> >In servlet A, I open a socket connection to host H, where
> >there is a servlet running as a server program. And I send
> >something to that servlet. In host H, the servlet receive
> >the information sent by A and process it. After that, write
> >something back to A. Then A read the information from it and
> >close the connection.
>
> Ok... seems reasonable... you could probably do it easier with a
> URLConnection though (since servlets can only be talked to over
> HTTP).
>
> >I implemented it and sometime encountered some io problem.
> >Someone told me, I should open two socket connections,
> >one for writing to host H, the other one for reading
> >from H. Is it right? Do I need to do that? Is my way of
> >communication correct?
>
> No you don't need to do that.
>
> Basically a servlet is just an object that recieves HTTP requests and
> sends HTTP responses.
>
> If you've got a problem it most likely will be the way that you send
> the request. You must follow the HTTP spec and if you don't then the
> communication won't work.
>
> Check the HTTP spec for details, or alternately use URLConnection and
> HttpURLConnection.
>
>
> Nic Ferrier
>
>
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