Re: Apache mod_jk connector question about alias

2016-10-20 Thread tomcat

On 20.10.2016 18:23, Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Marc,

On 10/20/16 11:34 AM, Marc Chamberlin wrote:

On 10/20/2016 3:19 AM, André Warnier (tomcat) wrote:

On 20.10.2016 01:58, Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256

Marc,

On 10/18/16 7:59 PM, Marc Chamberlin wrote:

On 10/17/2016 10:36 AM, Rainer Jung wrote:


Alias maps URIs to local file system directories. JkMount
maps URIs to remote back end requests.

You can not change JkMount forwarding using Alias (except
that if you have a comflict between Alias and JkMount only
one of them wins).

As far as I understand you are not really trying to map
requests to the local web server file system, but instead
want to forward to a Tomcat back end but change the URI
path which is used when accessing Apache to something else
being used to acces Tomcat. E.g. the URI
/jsp-examples/something gets used when accessing Apache and
mod_jk should send this request as /examples/jsp/something
to the Tomcat back end.

If you really need to change URIs, then often mod_proxy is
much easier to set up, because it has specific directives
for this (ProxyPass etc.).

With mod_jk you would first need to use mod_rewrite
RewriteRules to change the URI, and then JkMount to forward
them. More details can be found at

http://tomcat.apache.org/connectors-doc/common_howto/proxy.html#UR

L%2





0Rewriting






The rest of this docs page might be useful as well.


Regards,

Rainer


Thanks a million Rainer, you got me over that hump! I have
it working now but have another question - When the response
is generated for a request, that used the alias in the URL,
is there a way to keep the client browser from displaying
what the alias got mapped to?

So for example, if I use the alias in the URL -
http://www.mydomain.com/jsp-examples  that I send to the
Apache server, and it in turn forwards that request to Tomcat
as http://www.mydomain.com/examples/jsp, I would prefer that
the response, sent back to the user, contains the original,
aliased or unaliased, version of the URL that he/she typed,
and not just the resolved version. As it stands I am always
getting the response URL of
http://www.mydomain.com/examples/jsp displayed in the client
browser.

What follows is my current version of the config file that I
am using for the jsp-examples. Seems to be working mostly OK,
so hopefully I am on the right track. FYI - I intend to
include these config files in various virtual hosts
configurations each of which have their own document root,
hence the reason for the Alias commands at the beginning of
this config file.

Thanks again in advance for any and all offers of help,
thoughts, and replies...


Your best bet is to name the context in Tomcat to be whatever
you really want the URL path to be. This will remove all kinds
of problems you are likely to see in the future because of your
decision to try to rewrite URLs.

I never understand why people would rather spend a great deal
of time configuring around the fact that this simple command
will get everything working without any other issues:

$ mv webapps/name-you-have webapps/name-you-want


+10 Because once you start playing with Aliases and RewriteRules,
you are setting yourself up for a lot of future additional
complications in terms of Redirects, Authentication, etc.. most
of which you cannot even imagine right now.


Thanks Christopher, Andre for your comments and I will certainly
take them under consideration. If I were working in a simple
environment where all I had to do was to focus on Tomcat and Apache
I would certainly agree with you. Your simplistic solution of
renaming directories would indeed be the correct choice.

The problem is, is that the real world is not quite so
accommodating. I am trying to support a team of users who are using
other third party applications and also using cross-sectional tools
that require multiple resources/directories in the Tomcat/Apache
web directories, that all need to be coordinated. Some of this can
be solved with directory renaming or links, but in some cases it
becomes a question of whether the dog is wagging the tail or the
tail is wagging the dog in terms of the amount of work involved to
solve a problem; such as a simple Tomcat/Apache alone related
answer (directory renaming) implies. So I am exploring the choices
I have within the Tomcat/Apache tool space in order to determine
what choice is best. If indeed the tools available within Tomcat
and Apache are so odious to use, then yes I will also have to
explore the option of changing other tools, software, and
configurations in order to accommodate Tomcat and Apache.


It's not a question of whether of not the tools are odious, it's the
fact that a highly-complicated environment is going to require
highly-complicated configuration. I'm suggesting that you simplify
things. You will quickly find that you will need to start re-writing
entire pages of content to 

Re: Apache mod_jk connector question about alias

2016-10-20 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Marc,

On 10/20/16 11:34 AM, Marc Chamberlin wrote:
> On 10/20/2016 3:19 AM, André Warnier (tomcat) wrote:
>> On 20.10.2016 01:58, Christopher Schultz wrote:
>>> -BEGIN PGP SIGNED MESSAGE- Hash: SHA256
>>> 
>>> Marc,
>>> 
>>> On 10/18/16 7:59 PM, Marc Chamberlin wrote:
 On 10/17/2016 10:36 AM, Rainer Jung wrote:
> 
> Alias maps URIs to local file system directories. JkMount
> maps URIs to remote back end requests.
> 
> You can not change JkMount forwarding using Alias (except
> that if you have a comflict between Alias and JkMount only
> one of them wins).
> 
> As far as I understand you are not really trying to map
> requests to the local web server file system, but instead
> want to forward to a Tomcat back end but change the URI
> path which is used when accessing Apache to something else
> being used to acces Tomcat. E.g. the URI
> /jsp-examples/something gets used when accessing Apache and
> mod_jk should send this request as /examples/jsp/something
> to the Tomcat back end.
> 
> If you really need to change URIs, then often mod_proxy is
> much easier to set up, because it has specific directives
> for this (ProxyPass etc.).
> 
> With mod_jk you would first need to use mod_rewrite
> RewriteRules to change the URI, and then JkMount to forward
> them. More details can be found at
> 
> http://tomcat.apache.org/connectors-doc/common_howto/proxy.html#UR
L%2
>>>
> 
0Rewriting
> 
> 
> 
> 
>>> The rest of this docs page might be useful as well.
> 
> Regards,
> 
> Rainer
> 
 Thanks a million Rainer, you got me over that hump! I have
 it working now but have another question - When the response
 is generated for a request, that used the alias in the URL,
 is there a way to keep the client browser from displaying
 what the alias got mapped to?
 
 So for example, if I use the alias in the URL - 
 http://www.mydomain.com/jsp-examples  that I send to the
 Apache server, and it in turn forwards that request to Tomcat
 as http://www.mydomain.com/examples/jsp, I would prefer that
 the response, sent back to the user, contains the original,
 aliased or unaliased, version of the URL that he/she typed,
 and not just the resolved version. As it stands I am always
 getting the response URL of
 http://www.mydomain.com/examples/jsp displayed in the client 
 browser.
 
 What follows is my current version of the config file that I
 am using for the jsp-examples. Seems to be working mostly OK,
 so hopefully I am on the right track. FYI - I intend to
 include these config files in various virtual hosts
 configurations each of which have their own document root,
 hence the reason for the Alias commands at the beginning of
 this config file.
 
 Thanks again in advance for any and all offers of help,
 thoughts, and replies...
>>> 
>>> Your best bet is to name the context in Tomcat to be whatever
>>> you really want the URL path to be. This will remove all kinds
>>> of problems you are likely to see in the future because of your
>>> decision to try to rewrite URLs.
>>> 
>>> I never understand why people would rather spend a great deal
>>> of time configuring around the fact that this simple command
>>> will get everything working without any other issues:
>>> 
>>> $ mv webapps/name-you-have webapps/name-you-want
>>> 
>> +10 Because once you start playing with Aliases and RewriteRules,
>> you are setting yourself up for a lot of future additional
>> complications in terms of Redirects, Authentication, etc.. most
>> of which you cannot even imagine right now.
>> 
> Thanks Christopher, Andre for your comments and I will certainly
> take them under consideration. If I were working in a simple
> environment where all I had to do was to focus on Tomcat and Apache
> I would certainly agree with you. Your simplistic solution of
> renaming directories would indeed be the correct choice.
> 
> The problem is, is that the real world is not quite so
> accommodating. I am trying to support a team of users who are using
> other third party applications and also using cross-sectional tools
> that require multiple resources/directories in the Tomcat/Apache
> web directories, that all need to be coordinated. Some of this can
> be solved with directory renaming or links, but in some cases it
> becomes a question of whether the dog is wagging the tail or the
> tail is wagging the dog in terms of the amount of work involved to
> solve a problem; such as a simple Tomcat/Apache alone related
> answer (directory renaming) implies. So I am exploring the choices
> I have within the Tomcat/Apache tool space in order to determine
> what choice is best. If indeed the tools available within Tomcat
> and Apache are so odious to use, then yes I will also 

Re: Apache mod_jk connector question about alias

2016-10-20 Thread Marc Chamberlin

On 10/20/2016 3:19 AM, André Warnier (tomcat) wrote:

On 20.10.2016 01:58, Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Marc,

On 10/18/16 7:59 PM, Marc Chamberlin wrote:

On 10/17/2016 10:36 AM, Rainer Jung wrote:


Alias maps URIs to local file system directories. JkMount maps
URIs to remote back end requests.

You can not change JkMount forwarding using Alias (except that if
you have a comflict between Alias and JkMount only one of them
wins).

As far as I understand you are not really trying to map requests
to the local web server file system, but instead want to forward
to a Tomcat back end but change the URI path which is used when
accessing Apache to something else being used to acces Tomcat.
E.g. the URI /jsp-examples/something gets used when accessing
Apache and mod_jk should send this request as
/examples/jsp/something to the Tomcat back end.

If you really need to change URIs, then often mod_proxy is much
easier to set up, because it has specific directives for this
(ProxyPass etc.).

With mod_jk you would first need to use mod_rewrite RewriteRules
to change the URI, and then JkMount to forward them. More details
can be found at

http://tomcat.apache.org/connectors-doc/common_howto/proxy.html#URL%2

0Rewriting






The rest of this docs page might be useful as well.


Regards,

Rainer


Thanks a million Rainer, you got me over that hump! I have it
working now but have another question - When the response is
generated for a request, that used the alias in the URL, is there a
way to keep the client browser from displaying what the alias got
mapped to?

So for example, if I use the alias in the URL -
http://www.mydomain.com/jsp-examples  that I send to the Apache
server, and it in turn forwards that request to Tomcat as
http://www.mydomain.com/examples/jsp, I would prefer that the
response, sent back to the user, contains the original, aliased or
unaliased, version of the URL that he/she typed, and not just the
resolved version. As it stands I am always getting the response URL
of http://www.mydomain.com/examples/jsp displayed in the client
browser.

What follows is my current version of the config file that I am
using for the jsp-examples. Seems to be working mostly OK, so
hopefully I am on the right track. FYI - I intend to include these
config files in various virtual hosts configurations each of which
have their own document root, hence the reason for the Alias
commands at the beginning of this config file.

Thanks again in advance for any and all offers of help, thoughts,
and replies...


Your best bet is to name the context in Tomcat to be whatever you
really want the URL path to be. This will remove all kinds of problems
you are likely to see in the future because of your decision to try to
rewrite URLs.

I never understand why people would rather spend a great deal of time
configuring around the fact that this simple command will get
everything working without any other issues:

$ mv webapps/name-you-have webapps/name-you-want


+10
Because once you start playing with Aliases and RewriteRules, you are 
setting yourself up for a lot of future additional complications in 
terms of Redirects, Authentication, etc..

most of which you cannot even imagine right now.

Thanks Christopher, Andre for your comments and I will certainly take 
them under consideration. If I were working in a simple environment 
where all I had to do was to focus on Tomcat and Apache I would 
certainly agree with you. Your simplistic solution of renaming 
directories would indeed be the correct choice.


The problem is, is that the real world is not quite so accommodating. I 
am trying to support a team of users who are using other third party 
applications and also using cross-sectional tools that require multiple 
resources/directories in the Tomcat/Apache web directories, that all 
need to be coordinated. Some of this can be solved with directory 
renaming or links, but in some cases it becomes a question of whether 
the dog is wagging the tail or the tail is wagging the dog in terms of 
the amount of work involved to solve a problem; such as a simple 
Tomcat/Apache alone related answer (directory renaming) implies. So I am 
exploring the choices I have within the Tomcat/Apache tool space in 
order to determine what choice is best. If indeed the tools available 
within Tomcat and Apache are so odious to use, then yes I will also have 
to explore the option of changing other tools, software, and 
configurations in order to accommodate Tomcat and Apache.


My understanding of Tomcat and Apache is that they are supposedly robust 
enterprise grade tools, designed to work in complex environments. So my 
hope is that issues like this have been already addressed with elegant 
solutions. ;-) FYI I am using the jsp and servlet examples here as just 
a simple model of what I want to accomplish. I could really care less 
about those particular web applications.


 Marc...



Re: Apache mod_jk connector question about alias

2016-10-20 Thread tomcat

On 20.10.2016 01:58, Christopher Schultz wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Marc,

On 10/18/16 7:59 PM, Marc Chamberlin wrote:

On 10/17/2016 10:36 AM, Rainer Jung wrote:


Alias maps URIs to local file system directories. JkMount maps
URIs to remote back end requests.

You can not change JkMount forwarding using Alias (except that if
you have a comflict between Alias and JkMount only one of them
wins).

As far as I understand you are not really trying to map requests
to the local web server file system, but instead want to forward
to a Tomcat back end but change the URI path which is used when
accessing Apache to something else being used to acces Tomcat.
E.g. the URI /jsp-examples/something gets used when accessing
Apache and mod_jk should send this request as
/examples/jsp/something to the Tomcat back end.

If you really need to change URIs, then often mod_proxy is much
easier to set up, because it has specific directives for this
(ProxyPass etc.).

With mod_jk you would first need to use mod_rewrite RewriteRules
to change the URI, and then JkMount to forward them. More details
can be found at

http://tomcat.apache.org/connectors-doc/common_howto/proxy.html#URL%2

0Rewriting






The rest of this docs page might be useful as well.


Regards,

Rainer


Thanks a million Rainer, you got me over that hump! I have it
working now but have another question - When the response is
generated for a request, that used the alias in the URL, is there a
way to keep the client browser from displaying what the alias got
mapped to?

So for example, if I use the alias in the URL -
http://www.mydomain.com/jsp-examples  that I send to the Apache
server, and it in turn forwards that request to Tomcat as
http://www.mydomain.com/examples/jsp, I would prefer that the
response, sent back to the user, contains the original, aliased or
unaliased, version of the URL that he/she typed, and not just the
resolved version. As it stands I am always getting the response URL
of http://www.mydomain.com/examples/jsp displayed in the client
browser.

What follows is my current version of the config file that I am
using for the jsp-examples. Seems to be working mostly OK, so
hopefully I am on the right track. FYI - I intend to include these
config files in various virtual hosts configurations each of which
have their own document root, hence the reason for the Alias
commands at the beginning of this config file.

Thanks again in advance for any and all offers of help, thoughts,
and replies...


Your best bet is to name the context in Tomcat to be whatever you
really want the URL path to be. This will remove all kinds of problems
you are likely to see in the future because of your decision to try to
rewrite URLs.

I never understand why people would rather spend a great deal of time
configuring around the fact that this simple command will get
everything working without any other issues:

$ mv webapps/name-you-have webapps/name-you-want


+10
Because once you start playing with Aliases and RewriteRules, you are setting yourself up 
for a lot of future additional complications in terms of Redirects, Authentication, etc..

most of which you cannot even imagine right now.



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Re: Apache mod_jk connector question about alias

2016-10-19 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Marc,

On 10/18/16 7:59 PM, Marc Chamberlin wrote:
> On 10/17/2016 10:36 AM, Rainer Jung wrote:
>> 
>> Alias maps URIs to local file system directories. JkMount maps
>> URIs to remote back end requests.
>> 
>> You can not change JkMount forwarding using Alias (except that if
>> you have a comflict between Alias and JkMount only one of them
>> wins).
>> 
>> As far as I understand you are not really trying to map requests
>> to the local web server file system, but instead want to forward
>> to a Tomcat back end but change the URI path which is used when
>> accessing Apache to something else being used to acces Tomcat.
>> E.g. the URI /jsp-examples/something gets used when accessing
>> Apache and mod_jk should send this request as
>> /examples/jsp/something to the Tomcat back end.
>> 
>> If you really need to change URIs, then often mod_proxy is much
>> easier to set up, because it has specific directives for this
>> (ProxyPass etc.).
>> 
>> With mod_jk you would first need to use mod_rewrite RewriteRules
>> to change the URI, and then JkMount to forward them. More details
>> can be found at
>> 
>> http://tomcat.apache.org/connectors-doc/common_howto/proxy.html#URL%2
0Rewriting
>>
>>
>>
>> 
The rest of this docs page might be useful as well.
>> 
>> Regards,
>> 
>> Rainer
>> 
> Thanks a million Rainer, you got me over that hump! I have it
> working now but have another question - When the response is
> generated for a request, that used the alias in the URL, is there a
> way to keep the client browser from displaying what the alias got
> mapped to?
> 
> So for example, if I use the alias in the URL - 
> http://www.mydomain.com/jsp-examples  that I send to the Apache
> server, and it in turn forwards that request to Tomcat as 
> http://www.mydomain.com/examples/jsp, I would prefer that the
> response, sent back to the user, contains the original, aliased or
> unaliased, version of the URL that he/she typed, and not just the
> resolved version. As it stands I am always getting the response URL
> of http://www.mydomain.com/examples/jsp displayed in the client
> browser.
> 
> What follows is my current version of the config file that I am
> using for the jsp-examples. Seems to be working mostly OK, so
> hopefully I am on the right track. FYI - I intend to include these
> config files in various virtual hosts configurations each of which
> have their own document root, hence the reason for the Alias
> commands at the beginning of this config file.
> 
> Thanks again in advance for any and all offers of help, thoughts,
> and replies...

Your best bet is to name the context in Tomcat to be whatever you
really want the URL path to be. This will remove all kinds of problems
you are likely to see in the future because of your decision to try to
rewrite URLs.

I never understand why people would rather spend a great deal of time
configuring around the fact that this simple command will get
everything working without any other issues:

$ mv webapps/name-you-have webapps/name-you-want

- -chris
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Re: Apache mod_jk connector question about alias

2016-10-18 Thread Marc Chamberlin

On 10/17/2016 10:36 AM, Rainer Jung wrote:


Alias maps URIs to local file system directories.
JkMount maps URIs to remote back end requests.

You can not change JkMount forwarding using Alias (except that if you 
have a comflict between Alias and JkMount only one of them wins).


As far as I understand you are not really trying to map requests to 
the local web server file system, but instead want to forward to a 
Tomcat back end but change the URI path which is used when accessing 
Apache to something else being used to acces Tomcat. E.g. the URI 
/jsp-examples/something gets used when accessing Apache and mod_jk 
should send this request as /examples/jsp/something to the Tomcat back 
end.


If you really need to change URIs, then often mod_proxy is much easier 
to set up, because it has specific directives for this (ProxyPass etc.).


With mod_jk you would first need to use mod_rewrite RewriteRules to 
change the URI, and then JkMount to forward them. More details can be 
found at


http://tomcat.apache.org/connectors-doc/common_howto/proxy.html#URL%20Rewriting 



The rest of this docs page might be useful as well.

Regards,

Rainer

Thanks a million Rainer, you got me over that hump! I have it working 
now but have another question - When the response is generated for a 
request, that used the alias in the URL, is there a way to keep the 
client browser from displaying what the alias got mapped to?


So for example, if I use the alias in the URL - 
http://www.mydomain.com/jsp-examples  that I send to the Apache server, 
and it in turn forwards that request to Tomcat as 
http://www.mydomain.com/examples/jsp, I would prefer that the response, 
sent back to the user, contains the original, aliased or unaliased, 
version of the URL that he/she typed, and not just the resolved version. 
As it stands I am always getting the response URL of 
http://www.mydomain.com/examples/jsp displayed in the client browser.


What follows is my current version of the config file that I am using 
for the jsp-examples. Seems to be working mostly OK, so hopefully I am 
on the right track.
FYI - I intend to include these config files in various virtual hosts 
configurations each of which have their own document root, hence the 
reason for the Alias commands at the beginning of this config file.


Thanks again in advance for any and all offers of help, thoughts, and 
replies...


 Marc..


  # The following line makes apache aware of the location of
  # the /jsp-examples context
  Alias /examples/jsp "/srv/tomcat/webapps/examples/jsp"
  Alias /jsp-examples "/srv/tomcat/webapps/examples/jsp"

  
Options Indexes  FollowSymLinks
AllowOverride None
# Controls who can get stuff from this server.

Require all granted


Order allow,deny
Allow from all

  

  
# AllowOverride None

Require all denied


deny from all

  

  
 RewriteEngine On
 RewriteRule "^/jsp-examples" "/examples/jsp" [PT]
  

  
# Mounted stuff goes via tomcat (ajp13)
#  JkMount /jsp-examples tomcatWorker1
#  JkMount /jsp-examples/* tomcatWorker1
JkMount /examples/jsp tomcatWorker1
JkMount /examples/jsp/* tomcatWorker1
# Serve html, css, js, jpg, png and gif using Apache
JkUnMount /*.html tomcatWorker1
JkUnMount /*.css tomcatWorker1
JkUnMount /*.js tomcatWorker1
JkUnMount /*.jpg  tomcatWorker1
JkUnMount /*.png  tomcatWorker1
JkUnMount /*.gif  tomcatWorker1
  


--
"The Truth is out there" - Spooky


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Re: Apache mod_jk connector question about alias

2016-10-17 Thread Rainer Jung

Am 17.10.2016 um 19:16 schrieb Marc Chamberlin:

Hello -  My apologies if this has already been asked or the wrong mail
list, but Google is not coming up with an answer for me, so here goes...

I am trying to set up the mod_jk connector between an Apache HTTPD
server and Tomcat with the intent of supporting virtual hosts, and
serving static content from the Apache server and forwarding jsp and
servlet requests to Tomcat. Typical scenario I know...

Most of this I have working but the trouble I am having is with the use
an Alias directive for the Apache server. Following instructions for the
JSP examples that came with my distribution for Tomcat 8, I created a
configuration for


 

  # The following line makes apache aware of the location of
  # the /jsp-examples context
  Alias /jsp-examples "/srv/tomcat/webapps/examples/jsp"

  
Options Indexes  FollowSymLinks
AllowOverride None
# Controls who can get stuff from this server.

Require all granted


Order allow,deny
Allow from all

  

  # Mounted stuff goes via tomcat (ajp13)
  JkMount /jsp-examples tomcatWorker1
  JkMount /jsp-examples/* tomcatWorker1
  # Serve html, css, js, jpg, png and gif using Apache
  JkUnMount /*.html tomcatWorker1
  JkUnMount /*.css tomcatWorker1
  JkUnMount /*.js tomcatWorker1
  JkUnMount /*.jpg  tomcatWorker1
  JkUnMount /*.png  tomcatWorker1
  JkUnMount /*.gif  tomcatWorker1



I am actually defining this in the context of a virtual host and if
necessary I can post its configuration as well.

Using the JK debug level and monitoring the mod_jk.log file I can see
what is going wrong, I just don't know how to rectify it -


[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c (1208): sending to
ajp13 pos=4 len=469 max=8192
[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c (1208):  12 34 01
D1 02 02 00 08 48 54 54 50 2F 31 2E 31  - .4..HTTP/1.1
[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c (1208): 0010 00 00 0E
2F 6A 73 70 2D 65 78 61 6D 70 6C 65 73  - .../jsp-examples
[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c (1208): 0020 2F 00 00
0D 31 39 32 2E 31 36 38 2E 31 30 2E 31  - /...192.168.10.1


This excerpt shows that the Apache server is sending a message to the
Tomcat worker telling it to find a resource "/jsp-examples" which of
course doesn't really exist and so Tomcat reports a "Not Found" failure.
What I want is for the Apache server to send the actual location that
this alias is mapped to i.e. "/examples/jsp", which is what actually
exists in the Tomcat context. I can fool Tomcat into handling this alias
request by creating a link named jsp-examples -> examples/jsp within the
Tomcat webapps directory but that seems like a hack and not something I
want to have to do/maintain for all the other resources I will want to
handle via alias commands.

Is there a magic incantation that I am missing?  Thanks in advance for
suggestions/help Marc...


Alias maps URIs to local file system directories.
JkMount maps URIs to remote back end requests.

You can not change JkMount forwarding using Alias (except that if you 
have a comflict between Alias and JkMount only one of them wins).


As far as I understand you are not really trying to map requests to the 
local web server file system, but instead want to forward to a Tomcat 
back end but change the URI path which is used when accessing Apache to 
something else being used to acces Tomcat. E.g. the URI 
/jsp-examples/something gets used when accessing Apache and mod_jk 
should send this request as /examples/jsp/something to the Tomcat back end.


If you really need to change URIs, then often mod_proxy is much easier 
to set up, because it has specific directives for this (ProxyPass etc.).


With mod_jk you would first need to use mod_rewrite RewriteRules to 
change the URI, and then JkMount to forward them. More details can be 
found at


http://tomcat.apache.org/connectors-doc/common_howto/proxy.html#URL%20Rewriting

The rest of this docs page might be useful as well.

Regards,

Rainer

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Apache mod_jk connector question about alias

2016-10-17 Thread Marc Chamberlin
Hello -  My apologies if this has already been asked or the wrong mail 
list, but Google is not coming up with an answer for me, so here goes...


I am trying to set up the mod_jk connector between an Apache HTTPD 
server and Tomcat with the intent of supporting virtual hosts, and 
serving static content from the Apache server and forwarding jsp and 
servlet requests to Tomcat. Typical scenario I know...


Most of this I have working but the trouble I am having is with the use 
an Alias directive for the Apache server. Following instructions for the 
JSP examples that came with my distribution for Tomcat 8, I created a 
configuration for



 

  # The following line makes apache aware of the location of
  # the /jsp-examples context
  Alias /jsp-examples "/srv/tomcat/webapps/examples/jsp"

  
Options Indexes  FollowSymLinks
AllowOverride None
# Controls who can get stuff from this server.

Require all granted


Order allow,deny
Allow from all

  

  # Mounted stuff goes via tomcat (ajp13)
  JkMount /jsp-examples tomcatWorker1
  JkMount /jsp-examples/* tomcatWorker1
  # Serve html, css, js, jpg, png and gif using Apache
  JkUnMount /*.html tomcatWorker1
  JkUnMount /*.css tomcatWorker1
  JkUnMount /*.js tomcatWorker1
  JkUnMount /*.jpg  tomcatWorker1
  JkUnMount /*.png  tomcatWorker1
  JkUnMount /*.gif  tomcatWorker1



I am actually defining this in the context of a virtual host and if 
necessary I can post its configuration as well.


Using the JK debug level and monitoring the mod_jk.log file I can see 
what is going wrong, I just don't know how to rectify it -


[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug] 
ajp_connection_tcp_send_message::jk_ajp_common.c (1208): sending to 
ajp13 pos=4 len=469 max=8192
[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug] 
ajp_connection_tcp_send_message::jk_ajp_common.c (1208):  12 34 01 
D1 02 02 00 08 48 54 54 50 2F 31 2E 31  - .4..HTTP/1.1
[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug] 
ajp_connection_tcp_send_message::jk_ajp_common.c (1208): 0010 00 00 0E 
2F 6A 73 70 2D 65 78 61 6D 70 6C 65 73  - .../jsp-examples
[Mon Oct 17 09:28:01.145 2016] [30237:139868423546816] [debug] 
ajp_connection_tcp_send_message::jk_ajp_common.c (1208): 0020 2F 00 00 
0D 31 39 32 2E 31 36 38 2E 31 30 2E 31  - /...192.168.10.1


This excerpt shows that the Apache server is sending a message to the 
Tomcat worker telling it to find a resource "/jsp-examples" which of 
course doesn't really exist and so Tomcat reports a "Not Found" failure. 
What I want is for the Apache server to send the actual location that 
this alias is mapped to i.e. "/examples/jsp", which is what actually 
exists in the Tomcat context. I can fool Tomcat into handling this alias 
request by creating a link named jsp-examples -> examples/jsp within the 
Tomcat webapps directory but that seems like a hack and not something I 
want to have to do/maintain for all the other resources I will want to 
handle via alias commands.


Is there a magic incantation that I am missing?  Thanks in advance for 
suggestions/help Marc...




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