I have a very odd situation...
I have an app running on Tomcat 5.0.1.8. We're using it as both a web
server and servlet container. What's happening is I'm getting
NullPointerExceptions in both JSP's and servlets that is a result of request
parameters seemingly being lost somewhere along the way
ur original post, so I can say only this: when you find
yourself painted into a corner, it's time to revisit the design stage.
-QM
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http://www.omnytex.com
--
orward. One
thing that MIGHT work, although I'd frankly have to go try it myself to
be sure, is a subquery, something along the lines of:
select (update table set counter=counter+1) as counter from table
Even if the theory is correct, I'm not sure about how
database-independant it may
appealing, the other way will probably be more cross-browser (if
you consider this constant loading of issues in IE, and in Opera and
some others from what I read, to be a cross-browser concern as I would).
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Omnytex Technologies
http://ww
just about any browser (with JS enabled of course, but it degrades
nicely to just the single normal state image, so no harm there).
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Robert Koberg wrote:
Robert Hunt wrote:
To clarify:
Watching th
t verbiage, no problem, only takes a second to generate
the image. For interface element graphics that you think might change
with any kind of frequency (and to me this means AT ALL!), a program
like WebStyle can be your best friend.
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Founder and Chief Software Archi
You should be aware that IFrames are an IE-only thing. Won't work on
any other browser AFAIK.
What did you get when you tried onLoad()? Maybe I can gelp get that
working.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Jonathan W
re is a way that I don't know about to target a layer, that
could do the trick.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
David Wall wrote:
You should be aware that IFrames are an IE-only thing. Won't work on
any other browser
OM... does it have a src
attribute? You know what I'm getting at: dynamic changing of the
content. If that's possible, any idea how universal that would be?
Still, the most reliable solution for the problem at hand is probably
the META refresh...
No argument here :)
--
Frank W. Zamme
ill enough difference in how things are rendered to make it
unpleasant, but it's not nearly as difficult as it used to be.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Chad Maniccia wrote:
IE 4 made Netscape 4 look like a piece of cra
something like /initial_context/java:comp/env/jdbc/wms (not exactly, but
you get the idea).
Does that help any?
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Eric Wulff wrote:
I just returned from working on a tutorial at sun which
Aside from 8080, 8181 is a pretty typical port to use. There's no rules
or anything, virtually any port that isn't one of the well-known ports
would be fine, but those two you tend to see used quite a bit.
--
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Founder and Chief Software Architect
Omnytex Technol
dense all the code you
have to just one line, something like:
DataSource ds = (DateSource)new
InitialContext().lookup("java:comp/env/jdbc/wms")
I'm fairly certain that works. That might be clearer to you.
--
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Founder and Chief Software Architect
Omnyt
r
considering the obfuscation and encryption (think a PE compactor approach).
I think making it tough is about as good as you can hope to do, but as
Steven said, it's ALWAYS going to be defeatable one way or another.
--
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Founder and Chief Software Architect
Omnytex Technol
ittle bit easier and gives a bit more security. Not a lot mind you,
but enough to matter.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Peter Johnson wrote:
But ActiveX is an IE only element is it not?
For that case why not just use an apple
have some flexibility others
don't, although I don't have some flexibility others do, but that's a
topic for another thread). I do seem to recall seeing such a thing for
Firefox on Windows, but I could be mistaken.
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Founder and Chief Software Architect
sort of callback when the task is complete. Again, more details
would be helpful.
As I said, I'm making assumptions here, so I could be completely wrong!
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Santhosh Thomas wrote:
Hi
I know t
le approaches: callbacks and polling. You could do either
(callback to an applet for instance), but polling is probably easier.
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Omnytex Technologies
http://www.omnytex.com
Dakota Jack wrote:
Why do you want to put the request in the queque? I
al with one way or another (or find out the
config switch to turn it off, if my memory is serving me correctly in
saying it exists at all).
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Carlos Cajina wrote:
Good evening.
My question is abo
These are the basic servlet classes. I usually just put j2ee.jar on the
path, but there is also servlet-api.jar somewhere in /tomcat/common/lib.
Either one should do the trick.
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Omnytex Technologies
http://www.omnytex.com
James Peterson
rification to
be sure nothing fishy is going on wouldn't hurt).
If you could just post your OS and what the result was, I would greatly
appreciate it. Thanks in advance!
--
Frank W. Zammetti
Founder and Chief Software Arc
st getting into a situation where you might do
that. But, if your confident in your ability, and believe the use case
really warrants it, you CAN do it, and relatively safely.
--
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Dennis Payne wrote:
It
excellent point)
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
QM wrote:
On Tue, Dec 21, 2004 at 03:37:26PM -0700, Dennis Payne wrote:
: It is possible to create a servlet thread in the init() method. That
: thread sould stay alive and run
y a
Unix newbie, more or less, so someone else out there would be better
suited to answer that. I think you'd have to have it run at a lower
priority than your app server, and I'm sure there's switches to set
priority of jobs, but I don&
WEB-INF won't be reachable, which was the crux
of his problem as I understood it, that's why he was talking about
includes and such all over the place. But, if you really are serving
everything from there, how are you doing it? Just curious at this point :)
--
Frank W. Zammetti
F
I myself would tend towards a "push" model, since that's
really more in line with how most web development is done. So, have the
data collection servers push the records to the central server instead,
whether queues are involved or not.
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Founder and Ch
something people can live with.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
[EMAIL PROTECTED] wrote:
On Tue, 28 Dec 2004, Dakota Jack wrote:
What if you don't include the JSP file but "include" the related JAVA
file and use C
confirmed JAVA_HOME is set properly,
and I copied tools.jar to /common/lib, neither help. Thanks!
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ct way
that is causing a problem on this one Tomcat instance. Thanks for the
suggestion, it's a logical course of action.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Ryan Stewart wrote:
Quite simply, you have an error in your JSP th
m with the generated servlet. Any other ideas?
Thank you!
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Ryan Stewart wrote:
I answered you yesterday on this. There's generally no reason to post the same
question two days in a row. Just wai
? If
so, what version of Tomcat is OK with 5.0? (assuming any are, which I DO
assume). Or is this just some sort of fluke situation?
In any case, my problem is solved, and that was the resolution.
--
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.c
you provided however, but if you get to that hair-pulling stage
where you feel like your really stuck, I'm relatively sure the above
will do it for you, if worse comes to worse. I guess if this isn't
something that's going to be happening a lot, it might not be a problem
this
n to
rearchitect what your doing, but if you are, I very much suggest doing
so. Hope this helps!
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Andrzej Jan Taramina wrote:
I have a situation where some requests that get sent to Tomcat are ve
in solving your problem. I too will be watching to see what
your solution is, just out of curiosity.
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Andrzej Jan Taramina wrote:
Frank:
I don't know your usage pattern, but especially
ll you
that code in JSPs is to be avoided, and I'm not going out of my way to
debate that. But, I think it's fair to say that if you do have code in
JSPs, it should be (a) trivial and (b) strictly presentation-related.
Breaking THOSE rules, which by extension breaks the higher rules, i
fully.
Right tool for the job and all that jazz, right?!?
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Omnytex Technologies
http://www.omnytex.com
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that habit myself :)
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Tim Funk wrote:
Essentially you have written a servlet but packaged it as a JSP. Anytime
it becomes a trivial effort to hand transform a JSP into a servlet
usually means some r
k with that
version too.
Same problem with DLLs... how many times have you had a version conflict
with MS Common Controls? Maybe not recently because some work has been
done to alleviate this situation, but certainly in the past is arose all
the time. The same could happen if you make JARs
pulled when
serving images from a database), and I further assume your stylesheets
aren't just linked in...
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Dakota Jack wrote:
On Tue, 28 Dec 2004 13:57:33 -0500, Frank W. Zammetti
<[EMAI
cases
where a single server with a decent set of specs can handle the load
anyway, but in a more robust "enterprise" environment, your really kind
of defeating the purpose of a fleet of web servers in front of a number
of app servers.
--
Frank W. Zammetti
Founder and Chief Software Archi
it does, but it could be something for someone to
explore is my point.
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Dakota Jack wrote:
On Sat, 29 Jan 2005 17:17:03 -0500, Frank W. Zammetti
<[EMAIL PROTECTED]> wrote:
One thing worth po
code src='resource.do?file='my.css' is
stricly HTML.
Absolutely it is, but as I pointed out, it's being interpreted on the
browser side. That's where the issue comes in to play I think,
especially in a distributed environment. I'd be interested to hear your
sical user though, now you can only
service 10 concurrent users, so you've reduced your overall server
capacity (as viewed by outside clients) by 90%. Ouch.
I fully acknowledge those are rough, worst-case numbers... I certainly
don't mean to imply that your approach is 90% worse. Not at all! Just
trying to illustrate the problem, as I see it, in certain environments.
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Omnytex Technologies
http://www.omnytex.com
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ivity.
At this point I don't think either of us could walk away with an actual
answer :)
I understand. All your comments are quite fair, in my opinion. We'll
look around and learn a bit here.
I leave the leg-work to you :)
--
Frank W. Zammetti
Founder and Chief Software Architect
ther optimizations, it might turn out to be faster, but
that further proves my point: the web server is like the proxy in this
example.
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ld override
any tags or headers you set. I might be wrong about that, but that
would be my expectation. After all, what good is a setting in my
browser that says don't cache anything if a web site designer can come
along and overrule that? Surely the FOSS community would be up in arms
ove
stereo, but in general
you wouldn't expect the Caddy to lose.
A bit of hyperbole there, but the underlying point is what's important.
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
---
rver side to try and control
caching is either (a) useless because the end user can override it
anyway or (b) not in keeping with the "spirit" of the web, at least, not
as originally intended.
Now I'm off on a bit of a tangent though :)
--
Frank W. Zammetti
Founder and Chief Softwar
ough everything works perfectly as it should. I don't get it.
Thanks all!
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
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Sorry for the list noise :)
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Omnytex Technologies
http://www.omnytex.com
On Thu, February 17, 2005 11:02 am, Frank W. Zammetti said:
> Hello all. I have an Ant build script for an application that stops
> Tomcat if it's runnin
asn't been incorporated into JDK1.5 though,
that would have been a reasonable expectation. Is it perhaps rolled
into J2EE instead? I don't know. Same for JAF.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
David Smith wrote:
No
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ome office (laptop instead of
secondary PC is the big difference), configured in a very similar way,
so with the full VPN access to work, I can work almost as effectively at
home as at work, not to mention work on my own stuff off-hours.
--
Frank W. Zammetti
Founder and Chief Software Archit
ins, must be serializable.
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
David Whitehurst wrote:
If I use the "session" to store things, 1. Can I use simple java types?
2. Do I have to use Java Beans (extends serializable)?
David Wh
A filter is an ideal solution for this... It has the benefit of being
app-specific, so should you ever want to host another app in the same TC
instance that doesn't require those headers, they won't be set
automatically (i.e., at the server-level).
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Frank W. Zammetti
Founder
Filters:
http://java.sun.com/products/servlet/Filters.html
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
Rodrigo Avila wrote:
right... I need to all apps in an TC instance use these headers... how
I do it? I don't know how use fi
fmt.LocalizationContext(bundle);
javax.servlet.jsp.jstl.core.Config.set(session,
javax.servlet.jsp.jstl.core.Config.FMT_LOCALIZATION_CONTEXT,lc);
(...)
Do you know about any changes related to that in TC 5.5.x?
Thank you!
Paulo
-----Mensagem original-
De: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
Enviada em: qua
Question: are the requests for images and CSS files also going through the
filter? I'm wondering if those requests are getting forarded to the logon
page too, which obviously wouldn't work.
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) is called (DirtyFlag).
Thank you in advance for any help.
Jacob Champlin
EMO Corporation
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el free to ping me if you decide to use it and need some help getting
going beyond the article and included documentation.
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
U K Laxmi wrote:
I'm developing a web application using apache+to
user
needs to send to those reports to it's vendors. Excel
is the most desired format for them. Pls give your
feedback on this before i start implementing on this.
Thank you.
--- "Frank W. Zammetti" <[EMAIL PROTECTED]> wrote:
Take a look at DataVision. I think you'll li
rom timing
out.
Does that all make sense? (I'm not sure I described it well)
Frank W. Zammetti
-Original Message-
From: "Patrick Lacson"<[EMAIL PROTECTED]>
Sent: 5/13/05 12:56:43 AM
To: "Tomcat Users List"
Subject: Re: Sessions and
rom timing
out.
Does that all make sense? (I'm not sure I described it well)
Frank W. Zammetti
-Original Message-
From: "Patrick Lacson"<[EMAIL PROTECTED]>
Sent: 5/13/05 12:56:43 AM
To: "Tomcat Users List"
Subject: Re: Sessions and
I'm curious how this would work? If I open a page with an invisible GIF,
there's no way (without scripting and such) to have the GIF "refresh",
right? Or is there something I'm missing?
You can set a meta refresh on the page, but not the GIF itself, as far as
I
Write a SessionListener... it has two methods, one that fires when a
session is created, one when it is destroyed. That should do the trick
for you. That's not a Tomcat-specific solution either, so it should be
rather portable should you ever need to move to another app server.
--
Fr
d(HttpSessionEvent event) {
}
}
Couldn't be simpler! You can do event.getSession() in both if you need
to do anything with the session (like, for the OP, if you have a
reference to the user ID who's directory you want to purge of temporary
files).
--
Frank W. Zammetti
Founder and Ch
application
context to tell if the app was up or not too, so that if I had to make
the app unavailable during a time when it normally was available, I just
set the flag. I also defined a single user that was still allowed to
get in (another context parameter). This works out great.
--
Frank W
ing accordingly. It'd be just like using the
standard URL object, but it's more robust than that.
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
On Wed, May 18, 2005 11:58 am, Michael Mehrle said:
> Simple question, but it'
lowing the standards you rarely get that right now, it's not such a
problem :)
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
On Wed, May 18, 2005 2:53 pm, Will Hartung said:
>> From: "Michael Mehrle" <[EMAIL PROTECTED]>
&g
u.edu/staff/david/index.jsp?section=software&subsection=tcservcfg&page=overview
Of course, if your not on Windows or not running as a service, you already
have your answer :)
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
On Mon, May 23,
http://web.bvu.edu/staff/david/index.jsp?section=software&subsection=tcservcfg&page=downloads
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
On Mon, May 23, 2005 10:56 am, Dakota Jack said:
> Hi, again, Frank,
>
> Where ca
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.
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Omnytex Technologies
http://www.omnytex.com
--
lues that you want to be able to change the field to, like maybe
something like a "previous value" button, and you have the value at the
time the JSP is interpreted, you can do this and just call changeIt() in
response to onClick() of the button. That's something of a hybrid.
(String)request.getAttribute("theJSPContent")%>
And that's that. You could create a screen specifically for uploading a
JSP and storing it in the database.
Would something like this suite your needs? I realize it's not as
straight-forward as one might like, but it'
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.
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-
To
. But, for
reasons that would probably make your head spin if I explained, I cannot
simply allow the container to do it, I need to be able to do it from my
own code.
Moreover, this can't be a Tomcat-specific solution.
Any takers? :)
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Founder and Chief Software Architect
Om
something to throw, like an exception?
Thanks all!
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Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
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Yep, I *should* have known that :)...
The sendError() method of HttpServletRequest does it. Sorry for wasted
bandwidth!
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Omnytex Technologies
http://www.omnytex.com
On Tue, May 31, 2005 3:13 pm, Frank W. Zammetti said:
> I fear I sho
Thanks Jack, that's a good reference. It didn't really answer my specific
question, not that I could see immediately anyway, but I solved the
problem a different way anyhow, so it's all good. I bookmarked that
anyway, could be a good reference down the road for something.
--
Fr
Cool, good to know there is a difference. Thanks!
Frank
Dakota Jack wrote:
Just a small note, Frank. You use sendError(int sc) for errors but
setStatus(int sc) for codes that are not errors.
On 5/31/05, Frank W. Zammetti <[EMAIL PROTECTED]> wrote:
Yep, I *should* have know
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-
To uns
rs to turn off the "friendly messages"
option... I'm not certain, but I believe they will get you slightly more
helpful (to you) messages with that option turned off. It's under
Tools...Internet Options... Advanced... Show Friendly HTTP Error Messages.
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Frank W. Zammetti
F
Please see my previous post in this thread for some actual help
(potentially anyway).
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http://www.omnytex.com
On Mon, June 6, 2005 11:14 am, sudip shrestha said:
> I have no idea why you are continuing on this p
three
paths accessed to generate PDFs, and life is good again.
The point is be sure that it's no Tomcat setting the headers... and even
if it is and you turn that off, be sure they aren't getting set anywhere
else, like Struts, or some other app code.
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Founder
ks
Charles
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To u
ow you could use reflection as I suggested, i.e., what object would you
inspect when the field you want to check for is a JSP variable? I'm not
sure.
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Founder and Chief Software Architect
Omnytex Technologies
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On Mon, June 13, 2005 8:58 am, Charles P
rstand the problem you are trying to
solve, I actually dealt with a similar issue with included code needing a
Javascript variable that may or may not be present, but in this case I'm
not sure of a good answer.
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://
py :) Note that this process
as outlined is conceptual... there could be some details in how the
container does it's thing that I got wrong... from your perspective, and
the perspective of what the user sees though, it is correct.
I think that's everything. Hope that helps!
--
Frank W
Sorry for the disturbance... trying to troubleshoot a posting issue...
this will be the only such post to this list from me. Sorry again!
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I am
happy to do so. :)
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http://www.omnytex.com
On Mon, June 13, 2005 3:45 pm, Caldarale, Charles R said:
>> From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
>> Subject: Re: Help/Examples setting up
On Tue, June 14, 2005 9:26 am, Gagnon, Joseph M \(US SSA\) said:
> Very simple stuff. However, when I try to login (by loading the
> login.jsp page), I get the following error from Tomcat:
>
> HTTP Status 404 - /SPID_JSP/j_security_check
> --
if the decision ends
up being that we won't go the JSP route.
I realize that it's difficult for someone reading this to get the full
picture of my situation. I've tried to include all pertinent
information.
If anyone can help me out, I would sure appreciate it. (Thanks again
Frank
d Wide Web
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
ht
> Yes, it can be done with a simple . See earlier message in this
> thread for details, or follow the link to the Tomcat bug database in my
> previous message.
I missed that thread, but this is good to know. Thanks!
>Keep in mind, this is not just a problem > with pdf files
> Yes, it can be done with a simple . See earlier message in this
> thread for details, or follow the link to the Tomcat bug database in my
> previous message.
I missed that thread, but this is good to know. Thanks!
>Keep in mind, this is not just a problem > with pdf files
is that set up by default? Also, does he need
to create a context for his app and perhaps set something to tell Tomcat
to use security? This is stuff I am not familiar with, so hopefully
someone else reading this can help.
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Te
es one overcome this problem? TIA!
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
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Never mind, got it... changed:
ServletOutputStream out = response.getOutputStream();
..to...
PrintWriter out = response.getWriter();
...and it now works. I wouldn't mind an explanation though :)
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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
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