Re: [Lift] How to get the servlet context
All this is brittle, at least special! Please use the temp dir the servlet context will offer you. Tomcat and Jetty offer one. Heiko On Monday, November 30, 2009, jhonig al...@xs4all.nl wrote: Marius, I tried to create a link from the webapp dir to another location with rw-access, but that was not allowed... My conclusion was that you can't have symbolic links to locations outside the war. My problem is that there are three different locations that could all be interpreted as a root for looking up resources. I've found nothing suggesting one over the other, and none of them works. I assume there are more variables involved that I don't even know of. Job On Nov 30, 10:27 pm, Marius marius.dan...@gmail.com wrote: Ok I may be missing something essential from all this thread but why not use a folder from the user's home directory? If your app runs say under jetty OS user should heve read/write rights to write on the home user file-system. Even if not (although I haven't encountered the case) those rights can be granted by an admin. So why do you need special container allocated locations to write files? Br's, Marius On Nov 30, 11:18 pm, jhonig al...@xs4all.nl wrote: Hi Tim, Jeppe, and others who have replied... I have spent a few more hours, but there are just too many variables and I haven't been able to figure them out. I logged the various locations (running under a standalone jetty, not mvn jetty:run, and got this: INFO - TEMP = /tmp/Jetty_0_0_0_0_8080_tent. 0.1.SNAPSHOT.warvtra6b INFO - REAL = /tmp/Jetty_0_0_0_0_8080_tent. 0.1.SNAPSHOT.warvtra6b/webapp INFO - URL = file:/tmp/Jetty_0_0_0_0_8080_tent. 0.1.SNAPSHOT.warvtra6b/webapp/WEB-INF/classes/ I tried to access images, both from the HTML served to my browser and from Scala snippets. I used the following paths: Images/testimage.jpg work/Images/testimage.jpg classes/work/Images/testimage.jpg WEB-INF/classes/work/Images/testimage.jpg. The latter path is what I see in my .war file... I have no special filters. I tried to add entries to my site map, but none of them worked. About to give up. Hope somebody will help me. Job H. On Nov 28, 3:14 pm, jhonig al...@xs4all.nl wrote: Dear Tim and Heiko, I tested a few things under mvn jetty:run...: getRealPath gives me ./src/main/webapp the temp attribute is set to ./target/work and the location is ./target/classes While the war contains classes/work which is again different... I didn't manage to get jetty to serve contents from any other directory than the first one. Didn't try to run it on the standalone jetty, since I still don't know how to tell jetty to serve contents that is not under the webapp directory. Probably have to do something with the site map which I don't fully understand. Guess my main problem is that I don't have any experience in this field (jetty/lift) and thought it wouldn't be to difficult to port my website to lift and enhance it a little on the fly. To be continued... Job Honig On Nov 28, 12:52 am, Timothy Perrett timo...@getintheloop.eu wrote: Here's a nugget of information for you that will help (as I do something similar to what you want in one of my applications): val protectionDomain: ProtectionDomain = classOf[bootstrap.liftweb.Boot].getProtectionDomain() val location: URL = protectionDomain.getCodeSource().getLocation() Print the value of location, and that will get you headed in the right direction ;-) Moreover, if your using jetty, if there is a work directory next to where the war file is, jetty will automatically expand the war into that work folder... if not, it makes a temp directory in the relevant OS temp directory (/var/tmp on *nix OS) Godspeed. Tim. On 27 Nov 2009, at 21:49, Heiko Seeberger wrote: Job, -- Heiko Seeberger My job: weiglewilczek.com My blog: heikoseeberger.name Follow me: twitter.com/hseeberger OSGi on Scala: scalamodules.org Lift, the simply functional web framework: liftweb.net -- You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to lift...@googlegroups.com. To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/liftweb?hl=en.
Re: [Lift] How to get the servlet context
A way you can get the Servlet context is like this:
LiftRules.context match {
case context: HTTPServletContext = // do something with
context.ctx which is the javax.servlet.ServletContext
case _ = // do something when the context is not a servlet
context, perhaps log an error
}
The reason you need the match is because Lift can run on non-servlet
web containers, so Lift does not guarantee there is a Servlet context
in scope.
Hope that helps,
-Ross
On Nov 27, 2009, at 10:51 AM, jhonig wrote:
LS,
After Ross' kind invitation to post any other questions I might have,
I'll start with
this one:
The web application I am developing needs a scratch directory to white
scaled
images to. I first try to use a subdir of /tmp and put a symbolic
link in place to
access that directory from my project's context. However, this got me
an
error message (something about an aliased resource), so after some
searching
around I decided the best way is to create a directory inside WEF-INF
and
access it through getServletContext ().getRealPath (/...).
From the APIdocs I found out that an instance of a ServiceContext is
passed
to HTTPServletContext, but I haven't been able to find if that is the
instance I
need, or how to get an instance of HTTPServletContext...
Note: I am currently able to read/write temporary finds when running
through
mvn getty:run, but I need a solution that still works when I deploy a
war with
an existing jetty server.
Thanks for any hints!
Job Honig
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Re: [Lift] How to get the servlet context
According to the Servlet spec each webapp has got a private temporary
directory. I cannot remember exactly how to get this, maybe
ServletContext.getTmpDir(). Please take a look at the spec.
Heiko
On Friday, November 27, 2009, jhonig al...@xs4all.nl wrote:
Thanks Ross, I will try this! Is there a generic way to get to a
kind
of sandbox directory where snippets can read/write files?
Job
On Nov 27, 5:12 pm, Ross Mellgren dri...@gmail.com wrote:
A way you can get the Servlet context is like this:
LiftRules.context match {
case context: HTTPServletContext = // do something with
context.ctx which is the javax.servlet.ServletContext
case _ = // do something when the context is not a servlet
context, perhaps log an error
}
The reason you need the match is because Lift can run on non-servlet
web containers, so Lift does not guarantee there is a Servlet context
in scope.
Hope that helps,
-Ross
On Nov 27, 2009, at 10:51 AM, jhonig wrote:
LS,
After Ross' kind invitation to post any other questions I might have,
I'll start with
this one:
The web application I am developing needs a scratch directory to white
scaled
images to. I first try to use a subdir of /tmp and put a symbolic
link in place to
access that directory from my project's context. However, this got me
an
error message (something about an aliased resource), so after some
searching
around I decided the best way is to create a directory inside WEF-INF
and
access it through getServletContext ().getRealPath (/...).
From the APIdocs I found out that an instance of a ServiceContext is
passed
to HTTPServletContext, but I haven't been able to find if that is the
instance I
need, or how to get an instance of HTTPServletContext...
Note: I am currently able to read/write temporary finds when running
through
mvn getty:run, but I need a solution that still works when I deploy a
war with
an existing jetty server.
Thanks for any hints!
Job Honig
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athttp://groups.google.com/group/liftweb?hl=en
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--
Heiko Seeberger
My job: weiglewilczek.com
My blog: heikoseeberger.name
Follow me: twitter.com/hseeberger
OSGi on Scala: scalamodules.org
Lift, the simply functional web framework: liftweb.net
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