I have also been doing Applet-Servlet communication seriously. I confirm
Bo's findings.
I works well on:
* Intranet.
* Servlet container and the Client have public IP address.
* Dialup connections, where the Client has a dynamic IP address.
* jdk1.2 plugin. Haven't tested with jdk1.3.
It doesn't seem to work thru:
* Firewall or proxies.
Most of the references in the archives and elsewhere talk about making Java
applications work thru proxies. None of them talk about making Java applets,
where you do not know the proxy server, work thru proxies. Any inputs would
be very helpful.
Thanks,
Jayant.
-----Original Message-----
From: Bo Xu [mailto:[EMAIL PROTECTED]]
Sent: Friday, November 10, 2000 9:44 AM
To: [EMAIL PROTECTED]
Subject: Re: Applet-servlet communication does not work on internet.
Hiroshi Kasamatsu wrote:
> Applet-servlet communication does not work on internet.
> I have been making efforts to find clues,but I cannot see the light yet.
> I tried some URL connections,but only to fail.
> The remnant clue I expect is how to select doPost,doGet.
> *******************************************************
> 1.
> Applet side: Servlet side:
> doGet(....)
> write object -----------> read object
> read object <----------- write object
> *********************************************************
> 2.
> Applet side: Servlet side:
> doPost(....)
> write object -----------> read object
> read object <----------- write object
> *********************************************************
> I used doPost, or No2,because data is sent.
> But I also tried No1,but both to fail. One point I worry about is to
> include read and write within a doPost method.
> What does not work applet-servlet communication on internet?
>
> Hiroshi Kasamatsu
> [EMAIL PROTECTED]
>
Hi :-) from several emails in Servlet-List and my work:
0
* if you first write something in Applet, then in Servlet,
service/doPost
will be invoked.
* if you first read something in Applet, then in Servlet,
service/doGet
will be invoked.
* so you can only override service in your Servlet class if it is
possible.
1
from my work, it can work in Internet, I have test the following:
* Servlet container has public IP, its Internet connecting is
T1/ADSL/ISDN
* client of my Servlet class:
# has public IP, its Internet connecting is ISDN
# dialup user from sprint.ca
# pure-IE5.0 and pure-NN4.7.
2
I remember there are several emails in Servlet-List about the problem of
Applet-Servlet Communication in the following enviroment:
* firewall
* VPN
* Java Plugin 1.2/1.3 ?
but I am not sure, please check the Servlet Archive - Aug/Sep , 2000 :-)
Bo
Nov.10, 2000
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