creation of virtual directories

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creation of virtual directories

Jeffrey Beckstrom
We are looking at migrating from Glassfish to Tomcat. In Glassfish, we created alternatedocroot_N entries to map a path in Glassfish to a windows drive.

How do we perform a similar function in Tomcat?


Jeffrey Beckstrom
Lead Database Administrator
Information Technology Department
Greater Cleveland Regional Transit Authority
1240 W. 6th Street
Cleveland, Ohio 44113



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Re: creation of virtual directories

markt
On 11/06/18 19:58, Jeffrey Beckstrom wrote:
> We are looking at migrating from Glassfish to Tomcat. In Glassfish, we
> created alternatedocroot_N entries to map a path in Glassfish to a
> windows drive.
>
> How do we perform a similar function in Tomcat?

Tomcat version? (it changed between 7.0.x and 8.0.x)

Mark

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Re: creation of virtual directories

Jeffrey Beckstrom
We would go with the latest which appears to be 9. Google found articles for V7 and one that said it changed in 8 but did not describe the change.
>>> Mark Thomas <[hidden email]> 6/11/18 3:06 PM >>>
On 11/06/18 19:58, Jeffrey Beckstrom wrote:
> We are looking at migrating from Glassfish to Tomcat. In Glassfish, we
> created alternatedocroot_N entries to map a path in Glassfish to a
> windows drive.
>
> How do we perform a similar function in Tomcat?

Tomcat version? (it changed between 7.0.x and 8.0.x)

Mark

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Re: creation of virtual directories

Christopher Schultz-2
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Hash: SHA256

Jeffrey,

On 6/11/18 3:11 PM, Jeffrey Beckstrom wrote:

> We would go with the latest which appears to be 9. Google found
> articles for V7 and one that said it changed in 8 but did not
> describe the change.
>>>> Mark Thomas <[hidden email]> 6/11/18 3:06 PM >>>
> On 11/06/18 19:58, Jeffrey Beckstrom wrote:
>> We are looking at migrating from Glassfish to Tomcat. In
>> Glassfish, we created alternatedocroot_N entries to map a path in
>> Glassfish to a windows drive.
>>
>> How do we perform a similar function in Tomcat?
>
> Tomcat version? (it changed between 7.0.x and 8.0.x)

You are looking for "resources"[1] (not to be confused with
"resources"[2] or "JNDI resources"[3]).

You want to use <PreResources> or <PostResources> inside <Resources>
inside your <Context> element in META-INF/context.xml.

In general, I'd recommend using <PostResources> for non-code files,
because you don't want a user to be able to upload a file which then
takes precedence over a file or library that comes with your application
.

Note that resources are *cached by default*, so if you have dynamic
changes to the filesystem (e.g. file-uploads, separate processed
making changes to the fs, etc.) then you'll want to disable that.

Hope that helps,
- -chris

[1] http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html
[2] http://tomcat.apache.org/tomcat-9.0-doc/config/globalresources.html
[3] http://tomcat.apache.org/tomcat-9.0-doc/jndi-resources-howto.html
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Re: creation of virtual directories

markt
In reply to this post by Jeffrey Beckstrom
On 11/06/2018 20:11, Jeffrey Beckstrom wrote:
> We would go with the latest which appears to be 9. Google found articles
> for V7 and one that said it changed in 8 but did not describe the change.

You want http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html

You'd add something like this:

<Resources>
   <PostResources base="W:\some\path"
             className="org.apache.catalina.webresources.DirResourceSet"
           webAppMount="/"/>
</Resources>

Which would make the content of W:\some\path visible at the root of the
web application. Note that normally handling will apply. So, for
example, anything named *.jsp will get treated as as JSP page.

HTH,

Mark


>>>> Mark Thomas <[hidden email]> 6/11/18 3:06 PM >>>
> On 11/06/18 19:58, Jeffrey Beckstrom wrote:
>  > We are looking at migrating from Glassfish to Tomcat. In Glassfish, we
>  > created alternatedocroot_N entries to map a path in Glassfish to a
>  > windows drive.
>  >
>  > How do we perform a similar function in Tomcat?
>
> Tomcat version? (it changed between 7.0.x and 8.0.x)
>
> Mark
>
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Re: creation of virtual directories

Jeffrey Beckstrom
Do I enter this information into a GUI or directly into a file. If a file, what file? This may seem basic but have never touched Tomcat before.
>>> Mark Thomas <[hidden email]> 6/12/18 11:39 AM >>>
On 11/06/2018 20:11, Jeffrey Beckstrom wrote:
> We would go with the latest which appears to be 9. Google found articles
> for V7 and one that said it changed in 8 but did not describe the change.

You want http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html


You'd add something like this:

<Resources>
   <PostResources base="W:\some\path"
             className="org.apache.catalina.webresources.DirResourceSet"
           webAppMount="/"/>
</Resources>

Which would make the content of W:\some\path visible at the root of the
web application. Note that normally handling will apply. So, for
example, anything named *.jsp will get treated as as JSP page.

HTH,

Mark


>>>> Mark Thomas <[hidden email]> 6/11/18 3:06 PM >>>
> On 11/06/18 19:58, Jeffrey Beckstrom wrote:
>  > We are looking at migrating from Glassfish to Tomcat. In Glassfish, we
>  > created alternatedocroot_N entries to map a path in Glassfish to a
>  > windows drive.
>  >
>  > How do we perform a similar function in Tomcat?
>
> Tomcat version? (it changed between 7.0.x and 8.0.x)
>
> Mark
>
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Re: creation of virtual directories

Christopher Schultz-2
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Jeffrey,

On 6/12/18 1:21 PM, Jeffrey Beckstrom wrote:

> Do I enter this information into a GUI or directly into a file. If
> a file, what file? This may seem basic but have never touched
> Tomcat before.
>>>> Mark Thomas <[hidden email]> 6/12/18 11:39 AM >>>
> On 11/06/2018 20:11, Jeffrey Beckstrom wrote:
>> We would go with the latest which appears to be 9. Google found
>> articles for V7 and one that said it changed in 8 but did not
>> describe the change.
>
> You want
> http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html
>
>
> You'd add something like this:
>
> <Resources> <PostResources base="W:\some\path"
> className="org.apache.catalina.webresources.DirResourceSet"
> webAppMount="/"/> </Resources>
>
> Which would make the content of W:\some\path visible at the root of
> the web application. Note that normally handling will apply. So,
> for example, anything named *.jsp will get treated as as JSP page.

You'll want to edit your web application's META-INF/context.xml file.

If no such file exists, create a new one with this in it:

<Context>
</Context>

Then nest everything else inside that XML element wrapper.

- -chris

>>>>> Mark Thomas <[hidden email]> 6/11/18 3:06 PM >>>
>> On 11/06/18 19:58, Jeffrey Beckstrom wrote:
>>> We are looking at migrating from Glassfish to Tomcat. In
>>> Glassfish, we created alternatedocroot_N entries to map a path
>>> in Glassfish to a windows drive.
>>>
>>> How do we perform a similar function in Tomcat?
>>
>> Tomcat version? (it changed between 7.0.x and 8.0.x)
>>
>> Mark
>>
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Re: creation of virtual directories

Igal @ Lucee.org
On 6/12/2018 10:48 AM, Christopher Schultz wrote:

> <snip/>
>> You want
>> http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html
>>
>>
>> You'd add something like this:
>>
>> <Resources> <PostResources base="W:\some\path"
>> className="org.apache.catalina.webresources.DirResourceSet"
>> webAppMount="/"/> </Resources>
>>
>> Which would make the content of W:\some\path visible at the root of
>> the web application. Note that normally handling will apply. So,
>> for example, anything named *.jsp will get treated as as JSP page.
> You'll want to edit your web application's META-INF/context.xml file.
>
> If no such file exists, create a new one with this in it:
>
> <Context>
> </Context>
>
> Then nest everything else inside that XML element wrapper.
I thought that the XML declaration is required but testing shows that it
is not, and that the above example works (further investigation revealed
that in XML 1.1 the declaration is required but we're using XML 1.0 here).

Good to know.


Igal

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Re: [OT] creation of virtual directories

Christopher Schultz-2
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Igal,

On 6/12/18 2:09 PM, Igal @ Lucee.org wrote:

> On 6/12/2018 10:48 AM, Christopher Schultz wrote:
>> <snip/>
>>> You want
>>> http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html
>>>
>>>
>>> You'd add something like this:
>>>
>>> <Resources> <PostResources base="W:\some\path"
>>> className="org.apache.catalina.webresources.DirResourceSet"
>>> webAppMount="/"/> </Resources>
>>>
>>> Which would make the content of W:\some\path visible at the
>>> root of the web application. Note that normally handling will
>>> apply. So, for example, anything named *.jsp will get treated
>>> as as JSP page.
>> You'll want to edit your web application's META-INF/context.xml
>> file.
>>
>> If no such file exists, create a new one with this in it:
>>
>> <Context> </Context>
>>
>> Then nest everything else inside that XML element wrapper.
> I thought that the XML declaration is required but testing shows
> that it is not, and that the above example works (further
> investigation revealed that in XML 1.1 the declaration is required
> but we're using XML 1.0 here).
>
> Good to know.

The XML declaration (<?xml?>) is always optional, but does provide
important information if it's different from the default.
Specifically, it tells the parser what version of XML is being used
(default: 1.0) and what character encoding is being used (default: UTF-8
).

I would say that it's probably best to include the XML declaration,
especially if the documents are expected to be read/written by humans.

- -chris
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Re: [OT] creation of virtual directories

Igal Sapir
On 6/13/2018 9:06 AM, Christopher Schultz wrote:
> The XML declaration (<?xml?>) is always optional, but does provide
> important information if it's different from the default.
> Specifically, it tells the parser what version of XML is being used
> (default: 1.0) and what character encoding is being used (default: UTF-8
> ).
>
> I would say that it's probably best to include the XML declaration,
> especially if the documents are expected to be read/written by humans.

Yep.  Makes sense.


Igal

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