date:20240510

Re: Regarding Tomcat url redirection

2024-05-10 Thread Christopher Schultz


Lavanya,

On 5/10/24 06:03, lavanya tech wrote:

If we create new java.filter as below then we can redirect the urls  ?

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
public class UrlRedirectionFilter implements Filter {

 @Override
 public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
 throws IOException, ServletException {
 HttpServletRequest httpRequest = (HttpServletRequest) request;
 HttpServletResponse httpResponse = (HttpServletResponse) response;

 String requestUrl = httpRequest.getRequestURL().toString();

 // Check if the request URL matches the target URL
 if (requestUrl.equals("https://example.lbg.com;)) {
 // Perform redirect to the desired destination URL
 httpResponse.sendRedirect("https://server.lbg.com/towl;);



This is the exact opposite of the stated goal.

You said you wanted server.lbg.com/towl to be redirected to 
example.lbg.com/ but this does the opposite.


I also wouldn't both to check the protocol. Let's save this until after 
the ROOT application is working as expected.


-chris

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Re: Regarding Tomcat url redirection

2024-05-10 Thread Christopher Schultz

Lavanya,

On 5/10/24 04:37, lavanya tech wrote:

I tried the below and have the issues.

1)proxyPort="443" and proxyName="example.lbg.com" to the connector
2) remanmed towl.war to ROOT.war
3) created rewrite.config and added as below under conf/

Where are you defining the RewriteValve itself?

RewriteCond %{REQUEST_URI} ^/towl/(.*)
RewriteRule ^/towl/(.*) https://example.lbg.com/%1 [R]

If this is being handled by the ROOT servlet then I think it's right.

4) added this in web.xml file of /webapps/towl/web.xml/

Restricted Access to
/towl
/towl/*

No, this is wrong. Since this is the "towl" application and not ROOT,
you want to map /* and not /towl/* because the application will never
see the /towl/ as it's an application/context prefix that Tomcat will
remove.

Also I noticed that even if I rename the towl application to ROOT, when i
call the url with https://example.lbg.com/towl --> this towl directory is
getting created under webapps by default

If webapps/towl is being created, then it's happening for some other
reason. Do you have anything under conf/Catalina/*/towl.xml which points
to a WAR file or something? If so, remove that.

5) Resarted tomcat and I have the below error and all the urls have the
same issue

Message org.apache.jasper.JasperException:
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

That's weird. Try stopping, deleting the work/ directory and restarting.

Description The server encountered an unexpected condition that prevented
it from fulfilling the request.

Exception

org.apache.jasper.JasperException: org.apache.jasper.JasperException:
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:578)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:422)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Before you do anything with redirecting, can you just make sure you are
only deploying ROOT.war and nothing else?

This should allow you to reach the application at both
https://example.lbg.com/ and https://server.lbg.com/ as well as both of
those with port 8443.

Then use the applications and make sure they are working as expected.
Then, we'll add the /towl handling.

-chris

On Thu, May 9, 2024 at 11:20 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:

Lavanya,

On 5/9/24 13:48, lavanya tech wrote:

Thank you so much for your explanation. I will try these options.

Do server and example both resolve to the same IP?
-yes

Good, that significantly reduces the complexity required, since you can
do it will a single process (Tomcat) in a single environment.

So I need follow both 4a/b and 5a/b steps here or any of them ?

If I setup exactly by using below steps , then I should access both the
urls right ? https://server.lbg.com:8443/towl and

https://example.lbg.com

If you visit either hostname with /towl, you will be redirected to
example.lbg.com/ with no port number. example:8443 will still work and
no redirect will take place... unless you specifically make arrangements
for that. We can do that later if you really want to.

Let's get the other things working, first.

-chris

On Thursday, May 9, 2024, Christopher Schultz <

ch...@christopherschultz.net>

wrote:

Lavanya,

On 5/9/24 02:58, lavanya tech wrote:

Just giving background again of this topic again.

1) The application team who is working they wanted to access the url
https://server.lbg.com:8443/towl —> which should redirect or point to
https://example.lbg.com

Is that a typo? You want specifically https://server.lbg.com/towl and
https://example.lbg.com/ to point to your application?
— It’s not the Typo the requirements are still the

same.

Okay.

Do server and example both resolve to the same IP?

2) Hence I added firewall rule to redirect port 443 to 8443. And the url

https://example.lbg.com started working but its pointing to
https://server.lbg.com:8443 indeed and not

https://server.lbg.com:8443/to

But then they wanted the point 1 to have it. If I understood

correctly. So

basically to achieve this we wanted a reverse proxy setup ?

I didnot define any additional host in server.xml file on just left to
default to local host.

Here's what you have to do in order to support this odd configuration.

1. Configure your firewall to route port 443 -> 8443. I suspect this is
already done.

2. Deploy Tomcat on server.lbg.com with a on port 8443.

This

is the default, so there shouldn't be anything to do. I suspect this is
already done. You should set proxyPort="443" and proxyName="

Re: Regarding Tomcat url redirection

2024-05-10 Thread lavanya tech

Hi Chris,
If we create new java.filter as below then we can redirect the urls  ?

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
public class UrlRedirectionFilter implements Filter {

@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpServletResponse httpResponse = (HttpServletResponse) response;

String requestUrl = httpRequest.getRequestURL().toString();

// Check if the request URL matches the target URL
if (requestUrl.equals("https://example.lbg.com;)) {
// Perform redirect to the desired destination URL
httpResponse.sendRedirect("https://server.lbg.com/towl;);
return;
}

// For all other URLs, disable access
httpResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
}

// Other methods of the Filter interface (init(), destroy()) can be
left empty for this example
}

Thanks,
Lavanya

On Fri, May 10, 2024 at 10:37 AM lavanya tech 
wrote:

> Hi Chris,
>
> I tried the below and have the issues.
>
> 1)proxyPort="443" and proxyName="example.lbg.com" to the connector
> 2) remanmed towl.war to ROOT.war
> 3) created rewrite.config and added as below under conf/
>
> RewriteCond %{REQUEST_URI} ^/towl/(.*)
> RewriteRule ^/towl/(.*) https://example.lbg.com/%1 [R]
>
> 4) added this in web.xml file of /webapps/towl/web.xml/
>
>   
> 
>
> 
> 
> 
> Restricted Access to
> /towl
> /towl/*
> 
> 
> 
> 
> 
>
> Also I noticed that even if I rename the towl application to ROOT, when i
> call the url with https://example.lbg.com/towl --> this towl directory is
> getting created under webapps by default
>
> 5) Resarted tomcat and I have the below error and all the urls have the
> same issue
>
> Message org.apache.jasper.JasperException:
> java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
>
> Description The server encountered an unexpected condition that prevented
> it from fulfilling the request.
>
> Exception
>
> org.apache.jasper.JasperException: org.apache.jasper.JasperException:
> java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
>
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:578)
>
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:422)
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
> jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
>
> On Thu, May 9, 2024 at 11:20 PM Christopher Schultz <
> ch...@christopherschultz.net> wrote:
>
>> Lavanya,
>>
>> On 5/9/24 13:48, lavanya tech wrote:
>> > Thank you so much for your explanation. I will try these options.
>> >
>> > Do server and example both resolve to the same IP?
>> >  -yes
>>
>> Good, that significantly reduces the complexity required, since you can
>> do it will a single process (Tomcat) in a single environment.
>>
>> > So I need follow both 4a/b and 5a/b steps here or any of them ?
>> >
>> > If I setup exactly by using below steps , then I should access both the
>> > urls right ? https://server.lbg.com:8443/towl and
>> https://example.lbg.com
>>
>> If you visit either hostname with /towl, you will be redirected to
>> example.lbg.com/ with no port number. example:8443 will still work and
>> no redirect will take place... unless you specifically make arrangements
>> for that. We can do that later if you really want to.
>>
>> Let's get the other things working, first.
>>
>> -chris
>>
>> > On Thursday, May 9, 2024, Christopher Schultz <
>> ch...@christopherschultz.net>
>> > wrote:
>> >
>> >> Lavanya,
>> >>
>> >> On 5/9/24 02:58, lavanya tech wrote:
>> >>
>> >>> Just giving background again of this topic again.
>> >>>
>> >>> 1) The application team who is working they wanted to access the url
>> >>> https://server.lbg.com:8443/towl —> which should redirect or point to
>> >>> https://example.lbg.com
>> >>>
>> >>> Is that a typo? You want specifically https://server.lbg.com/towl and
>> >>> https://example.lbg.com/ to point to your application?
>> >>> — It’s not the Typo the requirements are still the
>> same.
>> >>>
>> >>
>> >> Okay.
>> >>
>> >> Do server and example both resolve to the same IP?
>> >>
>> >> 2) Hence I added firewall rule to redirect port 443 to 8443. And the
>> url
>> >>> https://example.lbg.com started working but its pointing to
>> >>> https://server.lbg.com:8443 indeed and not
>> https://server.lbg.com:8443/to
>> >>> wl
>> >>>
>> >>> But then they

Re: Regarding Tomcat url redirection

2024-05-10 Thread lavanya tech

Hi Chris,

I tried the below and have the issues.

1)proxyPort="443" and proxyName="example.lbg.com" to the connector
2) remanmed towl.war to ROOT.war
3) created rewrite.config and added as below under conf/

RewriteCond %{REQUEST_URI} ^/towl/(.*)
RewriteRule ^/towl/(.*) https://example.lbg.com/%1 [R]

4) added this in web.xml file of /webapps/towl/web.xml/

  





Restricted Access to
/towl
/towl/*






Also I noticed that even if I rename the towl application to ROOT, when i
call the url with https://example.lbg.com/towl --> this towl directory is
getting created under webapps by default

5) Resarted tomcat and I have the below error and all the urls have the
same issue

Message org.apache.jasper.JasperException:
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

Description The server encountered an unexpected condition that prevented
it from fulfilling the request.

Exception

org.apache.jasper.JasperException: org.apache.jasper.JasperException:
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:578)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:422)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

On Thu, May 9, 2024 at 11:20 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:

> Lavanya,
>
> On 5/9/24 13:48, lavanya tech wrote:
> > Thank you so much for your explanation. I will try these options.
> >
> > Do server and example both resolve to the same IP?
> >  -yes
>
> Good, that significantly reduces the complexity required, since you can
> do it will a single process (Tomcat) in a single environment.
>
> > So I need follow both 4a/b and 5a/b steps here or any of them ?
> >
> > If I setup exactly by using below steps , then I should access both the
> > urls right ? https://server.lbg.com:8443/towl and
> https://example.lbg.com
>
> If you visit either hostname with /towl, you will be redirected to
> example.lbg.com/ with no port number. example:8443 will still work and
> no redirect will take place... unless you specifically make arrangements
> for that. We can do that later if you really want to.
>
> Let's get the other things working, first.
>
> -chris
>
> > On Thursday, May 9, 2024, Christopher Schultz <
> ch...@christopherschultz.net>
> > wrote:
> >
> >> Lavanya,
> >>
> >> On 5/9/24 02:58, lavanya tech wrote:
> >>
> >>> Just giving background again of this topic again.
> >>>
> >>> 1) The application team who is working they wanted to access the url
> >>> https://server.lbg.com:8443/towl —> which should redirect or point to
> >>> https://example.lbg.com
> >>>
> >>> Is that a typo? You want specifically https://server.lbg.com/towl and
> >>> https://example.lbg.com/ to point to your application?
> >>> — It’s not the Typo the requirements are still the
> same.
> >>>
> >>
> >> Okay.
> >>
> >> Do server and example both resolve to the same IP?
> >>
> >> 2) Hence I added firewall rule to redirect port 443 to 8443. And the url
> >>> https://example.lbg.com started working but its pointing to
> >>> https://server.lbg.com:8443 indeed and not
> https://server.lbg.com:8443/to
> >>> wl
> >>>
> >>> But then they wanted the point 1 to have it. If I understood
> correctly. So
> >>> basically to achieve this we wanted a reverse proxy setup ?
> >>>
> >>> I didnot define any additional host in server.xml file on just left to
> >>> default to  local host.
> >>>
> >>
> >> Here's what you have to do in order to support this odd configuration.
> >>
> >> 1. Configure your firewall to route port 443 -> 8443. I suspect this is
> >> already done.
> >>
> >> 2. Deploy Tomcat on server.lbg.com with a  on port 8443.
> This
> >> is the default, so there shouldn't be anything to do. I suspect this is
> >> already done. You should set proxyPort="443" and proxyName="
> >> example.lbg.com" in your . This will ensure that any URLs
> >> generated by Tomcat or your application will point to
> >> https://example.lbg.com/ and not to server.lbg.com or have a port
> number
> >> or whatever.
> >>
> >> 3. Re-name your application directory or WAR file from towl -> ROOT
> (upper
> >> case is important). So if you have tomcat/webapps/towl re-name that to
> >> tomcat/webapps/ROOT or if you have tomcat/webapps/towl.war re-name that
> to
> >> tomcat/webapps/ROOT.war.
> >>
> >> The last thing to do is get /towl to re-direct to /. There are a few
> ways
> >> of doing that.
> >>
> >> 4a. Configure your application (now called ROOT and deployed on / and
> not
> >> /towl anymore) to handle the /towl URL and specifically redirect this
> back
> >> to /. This is oddly specific and has

Re: Regarding Tomcat url redirection

Re: Regarding Tomcat url redirection

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Re: Regarding Tomcat url redirection

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