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zakmck73@yahoo.it - 29 Aug 2006 12:15 GMT

Hi all,

I cannot find an answet to this silly question:

I have a web/module (aka web application) deployed on tomcat.

the application answers to the URL: http://some.host.net:port/myApp/

so, whatever is related to myApp and accessible via http (JSPs,
servlets, static pages), is available at
"http://some.host.net:port/myApp/path/to/whatever".

Now, how may I know what exactly is "http://some.host.net:port/myApp/"
from whitin a JSP or a servlet?

Thanks in advance.

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Andrew Thompson - 29 Aug 2006 12:29 GMT

> Now, how may I know what exactly is "http://some.host.net:port/myApp/"
> from whitin a JSP or a servlet?

<http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/ServletContext.html#
getRealPath(java.lang.String)>

HTH

Andrew T.

Reply to this Message

Babu Kalakrishnan - 29 Aug 2006 13:28 GMT

> ..
>
>>Now, how may I know what exactly is "http://some.host.net:port/myApp/"
>>from whitin a JSP or a servlet?
>
> <http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/ServletContext.html#
getRealPath(java.lang.String)>

That would give you only the RealPath relative to the local file system.
(On my local server, it would return "/opt/tomcat55/webapps/myApp/xxx" )

The original question cannot really be answered in a global context. For
instance, the same resource may be available under several variants of
the URL. e.g. A certain page that may be accessible as
"http://127.0.0.1:8080/myApp/index.jsp" from my local machine would only
be accessible with a different hostname/IP when the same is accessed
from another machine on the internet.

This information therefore would be relevant only in the context of a
particular HTTP request, and one can obtain it using :

request.getRequestURL();

BK

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ElectricHappiness.com - 30 Aug 2006 05:49 GMT

I actually just tackled a similar problem. But my hosting company
would not allow me to write to my own domain, I had to write to a
generally accessible temp folder.

Just copy and paste this code into a servlet/JSP page and run it. It
should reveal which method you should use.

where...
F = first letter of login name
S = second letter of login name
T = third letter of login name

try{
 x = new File("/home/content/F/S/T/FSTloginName/html/temp/1.txt");
 filUploadedFile = new File("/tmp/1.txt");
 filUploadedFile.createNewFile();
 out.println(" ");
 }catch(Exception e){
 e.getLocalizedMessage();
 out.println(" ");
 out.println(e.getLocalizedMessage());
 out.println(" " );
 }

 try{
 x = new File(request.getContextPath() + "./" + "f.txt");
 x.createNewFile();
 out.println("good " + x.getAbsolutePath());
 out.println(" x.getAbsolutePath() ");
 }catch(Exception e){
 out.println(" ");
 out.println("BAD 1-> request.getContextPath()./ ");
 out.println(" " + request.getContextPath());
 }
 try{
 x = new File(request.getContextPath() + "/" + "e.txt");
 x.createNewFile();
 out.println("good " + request.getContextPath() + " ");
 out.println(" request.getContextPath(/) ");
 }catch(Exception e){
 out.println(" ");
 out.println("BAD 2-> request.getContextPath()/");
 out.println(" " + request.getContextPath());
 }

 out.println(" round 2 ");

 try{
 x = new File(".", "d.txt");
 out.println("good " + x.getAbsolutePath());
 out.println(" x.getAbsolutePath() " );
 x.createNewFile();
 }catch(Exception e){
 out.println(" ");
 out.println("BAD -> new File(.)");
 out.println(" " );
 }

 try{
 x = new File(request.getContextPath(), "c.txt");
 x.createNewFile();
 out.println("good " + x.getAbsolutePath());
 out.println(" x.getAbsolutePath() ");
 }catch(Exception e){
 out.println(" ");
 out.println("BAD 1-> request.getContextPath()./ ");
 out.println(" " + request.getContextPath());
 }
 try{
 x = new File(request.getContextPath(),"b.txt");
 x.createNewFile();
 out.println("good " + request.getContextPath() + " ");
 out.println(" request.getContextPath(/) ");
 }catch(Exception e){
 out.println(" ");
 out.println("BAD 2-> request.getContextPath()/");
 out.println(" " + request.getContextPath());
 }

good luck!

<a href="www.electricHappiness.com">_</a>

> > ..
> >
[quoted text clipped - 19 lines]
>
> BK

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