| 00:28.18 | *** join/#tomcat Delph (delph@light.bluelinux.co.uk) |
| 00:28.29 | Delph | I want to write a Filter that will optionally rewrite an URL and send it back in the front of the servlet engine again |
| 00:28.35 | Delph | however I need to keep the attributes that have been set on it, and it needs to go through the filters again (those that are configured on its new URL) |
| 00:28.41 | Delph | Do i want to use RequestDispacher.forward(..,..) at the end of my filter (to change where the request is going) |
| 00:28.46 | Delph | or do i need to use FilterChain.doFilter(...) to keep the filters going? |
| 00:29.23 | Delph | (and the code is in cvs, GeneralPurposeUrlServletFilter, if you happen to be Hugh) |
| 00:31.17 | HughWork | i think you want to call forward(), calling doFilter() will only cause the request to be filtered by the filters lower down the chain, not the ones above it |
| 00:31.52 | Delph | yeah, but it's not hitting the acegi filters, and not getting a SecureContext for the authentication when I use forward(). |
| 00:39.50 | HughWork | i've not used acegi, is just a standard filter? |
| 00:40.09 | HughWork | or do you think the forward isn't causing all filters to be invoked? |
| 00:41.26 | Delph | i'm not entirely sure. |
| 00:42.05 | Delph | it's just a standard filter; pulls a token off the Session and uses it to populate an authentication thingy |
| 00:54.38 | Delph | jasonb: i'm not entirely sure how that will help =:/ |
| 00:55.34 | Delph | a tomcat valve seems to be very similar to a Filter. |
| 00:57.18 | Delph | javadocs say: .... A valve MUST NOT: Change request properties that have already been used to direct the flow of processing control for this request . |
| 00:57.33 | Delph | won't that mean that redirecting it to another URL as well? |
| 01:01.00 | jasonb | It sounds as though what you're trying to do is something that really would need to be done as part of Tomcat itself, and not part of the webapp. From within a Valve, you have more control over request processing, and I think you'd need that to do what you're wanting to do. |
| 01:01.21 | Delph | hmm. |
| 01:01.41 | jasonb | If you forward the request at all, you do change the request somewhat, in ways that may only later lead you (or another developer) into a dead end. |
| 01:01.56 | Delph | all i want to do is optionally rewrite a requested url and send it back into the tomcat request dispatcher |
| 01:02.10 | jasonb | With a Valve, you can direct the request however you'd like, with or without modifying it however you'd like to. |
| 01:02.36 | Delph | where do Valves lie in the processing chain? |
| 01:03.01 | Delph | request -> (parsed) -> valves -> filters -> servlets ? |
| 01:03.18 | jasonb | Valves are part of the Tomcat container system. They intercept requests along the request handling chain before filters get invoked. |
| 01:04.06 | jasonb | So, Valves are considered to be more part of Tomcat than part of any webapp, but whether that's okay in your case really depends on who runs your webapp. |
| 01:04.11 | jasonb | (and on what server) |
| 01:05.26 | Delph | hmm. this diagram ( http://jakarta.apache.org/tomcat/tomcat-5.0-doc/architecture/requestProcess/requestProcess.pdf ) seems to suggest that Valves lie both outside and inside a Context. |
| 01:05.59 | jasonb | I've been considering (for quite a while) writing some kind of mod_rewrite equivalent for Tomcat stand-alone, and contribute it to the Tomcat project. But, as you probably guessed by now, it's not easy to write something like that, and there are lots of different ways it could alter requests, and lots of different ways people may want to use it. |
| 01:06.07 | Delph | yeah. |
| 01:06.46 | Delph | I found this: http://tuckey.org/urlrewrite/ which seems to do some bits of mod_rewrite emulation |
| 01:06.52 | jasonb | Valves can actually be configured at any level of the Tomcat container system.. at the Engine level I believe, all the way down to inside a Context. |
| 01:06.57 | Delph | but only as a filter. |
| 01:07.29 | Delph | actually, this is total rubbish. |
| 01:07.33 | Delph | i *know* i've done this before. |
| 01:07.53 | jasonb | Filters were meant to replace valves, and be more powerful in some ways, but that can't exactly be the case because Valves are Tomcat-specific, and as such have abilities that only Tomcat-specific code could take advantage of, and that's powerful in ways that webapp code shouldn't really be. |
| 01:07.56 | Delph | there's an obvious mistake in what i'm doing, i'm sure. |
| 01:08.06 | jasonb | Not necessarily. |
| 01:08.34 | jasonb | I do believe there is a use for something like a Valve that can rewrite requests in certain ways. |
| 01:08.35 | Delph | oh, no, wait. |
| 01:09.07 | Delph | they're spring interceptors, not servlet Filters that are getting run. |
| 01:09.21 | Delph | (in the code that does work) |
| 01:35.56 | Delph | hah. |
| 01:36.00 | Delph | it *does* work. |
| 01:36.16 | Delph | I'd put the <filter-mappings> in the wrong order in the webapp |
| 01:36.53 | Delph | i needed to do the acegi filtering *first* then call my redirector with the (filtered and correctly setup) request. |
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| 02:16.59 | chris256 | Hello. |
| 02:18.10 | chris256 | I've not used Tomcat and have never installed or configured a web server before but I would like to start using Tomcat. |
| 02:18.54 | chris256 | Is it difficult to install and configure for someone who is not experienced installing and configuring? |
| 02:19.05 | chris256 | Web servers that is. |
| 02:20.32 | chris256 | I want to develop a client server application using Java and/or JSP on the server side and html forms on the client side. |
| 02:21.33 | chris256 | I want to allow just users on my company's intranet to use the application. |
| 02:22.12 | chris256 | Would Tomcat as a stand alone server be adequate for the server side? |
| 02:23.10 | chris256 | That is if the client side app is just the users' web browser. |
| 02:24.06 | chris256 | I wouldn't need to serve the html docs from a web server. The html docs can just reside on computers on the network. We use Microsoft. |
| 02:24.36 | Delph | chris256: i would reccomend that your companies IT department get at least a little involved in this. |
| 02:25.43 | chris256 | I agree. |
| 02:26.17 | chris256 | I would like to be as knowledgable about it before I make any proposals first. |
| 02:27.05 | Delph | it's not hard. but if you're a microsoft shop then you might end up being asked to use .NET and VBScript and ASP and all that gubbins. |
| 02:28.24 | chris256 | Yeah. We don't have .NET licensed though. Nobody at our company has ever done anything like this before. |
| 02:29.26 | Delph | well, it's fairly simple to just unzip and install. The default configuration is safe. |
| 02:30.02 | Delph | i'm not an expert on windows boxes (are you going to be running it on windows?) but i've always found it fairly easy to get to grips with. |
| 02:30.52 | chris256 | Yes. It will be with Windows. |
| 02:31.07 | chris256 | I want to install Tomcat on my local machine to develop the app. |
| 02:31.25 | chris256 | And test it. |
| 02:31.55 | chris256 | Would Tomcat be enough as a standalone server to process servlets to the intranet? |
| 02:32.39 | Delph | yes. |
| 02:32.57 | chris256 | Excellent. |
| 02:33.02 | Delph | most people develop on tomcat, however in a live deployment, you often find people putting an apache server infront. |
| 02:33.16 | Delph | tomcat is also fine as a standalone webserver. |
| 02:33.53 | chris256 | Cool. Do I understand it correct that Tomcat can only host html pages to the local machine? |
| 02:34.16 | Delph | what? |
| 02:34.46 | Delph | the pages have to reside on the local machine by default. You could write a servlet to fetch them from elsewhere. |
| 02:35.42 | chris256 | If I was to use http to get a web page from another machine (no servlets) with Tomcat, would that work? |
| 02:35.54 | chris256 | On port 80, not 8080 |
| 02:36.40 | Delph | you can run tomcat on whatever port you like. |
| 02:36.51 | Delph | oh look, go and get it and play around. |
| 02:36.59 | Delph | probably easier than this piecemeal discussion =:) |
| 02:37.20 | chris256 | O.k. Your right. I'll just have to jump into it to understand it all more. |
| 03:43.05 | chris256 | Thanks. |
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| 08:06.20 | dza | i'm trying to use tomcat 5 on linux. i try to start tomcat and i get the message JAVA_HOME environment variable is not defined. I have set the java_home and tested it. any ideas? |
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| 08:29.02 | loquace | lo |
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| 10:21.49 | feidaykin | Salut |
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| 12:52.45 | ni1 | i need some help to configure virtual host |
| 12:53.24 | ni1 | i am running apache-1.3, tomcat-4.1.31 in my server. |
| 13:21.21 | ni1 | Hi, |
| 13:21.28 | ni1 | Any one.. |
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| 14:55.11 | crackhead | goooooood morning |
| 14:55.56 | jasonb | mornin' |
| 14:56.37 | harpoon | jasonb: good afternoon |
| 15:05.00 | ni1 | morning.. |
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| 15:44.26 | incorrect | in your workers.properties can you split it up into separate files? |
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| 16:10.16 | ni1 | how to split into separate files? |
| 16:11.19 | incorrect | sorry i figured out another method |
| 16:21.37 | ni1 | could give some light on it? |
| 16:23.05 | incorrect | i just wanted to break my workers2.properties up into smaller files, |
| 16:23.31 | incorrect | mine has turned into a bit of a pig |
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| 17:52.02 | crackhead | anyone have experience with hibernate |
| 17:52.15 | crackhead | I was just wondering what people think about it |
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| 23:04.00 | loquace | ++ |
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