How to have relative paths refer to the context root

[Jesse Altman <al...@gmail.com>]

Hello,

I am running Tomcat 8.5.15 on Windows 10.

I have a folder called "myapp" with my web application files inside of it.
Inside ${tomcat_base}/conf/Catalina/localhost I have my configuration file
"other.xml" with the following entry:

<Context docBase="{full path to the myapp folder}">
</Context>

The index.html file lives inside myapp/client with the following text:

<a href="file1.txt">text file 1</a>
<a href="/file2.txt">text file 2</a>

file1.txt also lives inside myapp/client
file2.txt lives inside myapp

The html file is then accessed by going to http://locahost:8080/other/client.
When clicking the "text file 1" link it correctly finds the file under
http://localhost:8080/other/client/.  When clicking on the "text file 2"
link unfortunately it looks for it under http://localhost:8080/, and it is
not found.  I was hoping since the path to file2.txt starts with a '/' it
would look for it under the context root http://localhost:8080/other/, but
unfortunately it seems to look for it under the base webapps folder.  Is
there a way to have a path refer to the context root of my application
without specifically adding the context root in there?

Thank you,

Jesse

Re: How to have relative paths refer to the context root

[Christopher Schultz <ch...@christopherschultz.net>]

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Jesse,

On 5/17/17 3:33 PM, Jesse Altman wrote:
> Hello,
> 
> I am running Tomcat 8.5.15 on Windows 10.
> 
> I have a folder called "myapp" with my web application files inside
> of it. Inside ${tomcat_base}/conf/Catalina/localhost I have my
> configuration file "other.xml" with the following entry:
> 
> <Context docBase="{full path to the myapp folder}"> </Context>
> 
> The index.html file lives inside myapp/client with the following
> text:
> 
> <a href="file1.txt">text file 1</a> <a href="/file2.txt">text file
> 2</a>
> 
> file1.txt also lives inside myapp/client file2.txt lives inside
> myapp
> 
> The html file is then accessed by going to
> http://locahost:8080/other/client. When clicking the "text file 1"
> link it correctly finds the file under 
> http://localhost:8080/other/client/.  When clicking on the "text
> file 2" link unfortunately it looks for it under
> http://localhost:8080/, and it is not found.  I was hoping since
> the path to file2.txt starts with a '/' it would look for it under
> the context root http://localhost:8080/other/, but unfortunately it
> seems to look for it under the base webapps folder.  Is there a way
> to have a path refer to the context root of my application without
> specifically adding the context root in there?

This is not possible without a dynamic resource. So you can do it e.g.
with JSP:

<a href="${pageContext.request.contextPath}/file2.txt">text file 2</a>

(You should really encode the above URL through response.encodeURL but
I wanted the example to be clean.)

But if you know that index.html lives at the root of the context path,
then simply:

<a href="file2.txt">text file 2</a>

is all you need.

- -chris
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