[GRASS5] Some strange HTML online output

GRASS GRASS developer
1

Hi,

while looking at the HTML man pages:
http://grass.itc.it/gdp/html_grass5/html/p.map.html
http://grass.itc.it/gdp/html_grass5/html/p.map.new.html

some strange output occurs:
Menu for /gdp/html_grass5/html/p.map.html

          html
[an internal server error occured]

Obviously these pages are treated as something different
(PHP?).

Any ideas to solve this? The HTML code is o.k., I think.

Thanks,
Markus

2

On Thu, Jan 24, 2002 at 01:11:32PM +0100, Markus Neteler wrote:

Hi,

while looking at the HTML man pages:
http://grass.itc.it/gdp/html_grass5/html/p.map.html
http://grass.itc.it/gdp/html_grass5/html/p.map.new.html

some strange output occurs:
Menu for /gdp/html_grass5/html/p.map.html

          html
[an internal server error occured]

Obviously these pages are treated as something different
(PHP?).

Any ideas to solve this?

Check the log file(s) of the server for messages.
You might need to turn on debugging information for this.

The HTML code is o.k., I think.

It most certainly is a configuration problem of the webserver

--
Professional Service for Free Software (intevation.net)
The FreeGIS Project (freegis.org)
Association for a Free Informational Infrastructure (ffii.org)
FSF Europe (fsfeurope.org)

3

On Thu, Jan 24, 2002 at 02:09:43PM +0100, Bernhard Reiter wrote:

On Thu, Jan 24, 2002 at 01:11:32PM +0100, Markus Neteler wrote:
> Hi,
>
> while looking at the HTML man pages:
> http://grass.itc.it/gdp/html_grass5/html/p.map.html
> http://grass.itc.it/gdp/html_grass5/html/p.map.new.html
>
> some strange output occurs:
> Menu for /gdp/html_grass5/html/p.map.html
>
> html
> [an internal server error occured]
>
> Obviously these pages are treated as something different
> (PHP?).
>
> Any ideas to solve this?

Check the log file(s) of the server for messages.
You might need to turn on debugging information for this.

> The HTML code is o.k., I think.

It most certainly is a configuration problem of the webserver

Looking into error_log:

[Thu Jan 24 14:07:45 2002] [error] [client 140.XXX] map file
/gdp/html_grass5/html/p.map.new.html, line 2 syntax error: requires at least
two fields

-> map file?

Or course
http://grass.itc.it/gdp/html_grass5/html/ps.map.html
is also not readable.

The "map" in the filename confuses the Apache. But why (sorry,
yes, I could browse the web)?

Markus

4

Markus Neteler wrote:

while looking at the HTML man pages:
http://grass.itc.it/gdp/html_grass5/html/p.map.html
http://grass.itc.it/gdp/html_grass5/html/p.map.new.html

some strange output occurs:
Menu for /gdp/html_grass5/html/p.map.html

          html
[an internal server error occured]

Obviously these pages are treated as something different
(PHP?).

Any ideas to solve this? The HTML code is o.k., I think.

It doesn't matter whether or not the HTML code is OK. Even if you give
a ".html" extension to a file of completely random binary data, it
shouldn't cause an internal server error.

My suspicion is that the server has been configured to treat any
filename which contains[1] the string ".map" as a server-side image
map.

[1] as opposed to ending in ".map".

--
Glynn Clements <glynn.clements@virgin.net>

5

On Thu, Jan 24, 2002 at 01:50:24PM +0000, Glynn Clements wrote:

Markus Neteler wrote:

> while looking at the HTML man pages:
> http://grass.itc.it/gdp/html_grass5/html/p.map.html
> http://grass.itc.it/gdp/html_grass5/html/p.map.new.html
>
> some strange output occurs:
> Menu for /gdp/html_grass5/html/p.map.html
>
> html
> [an internal server error occured]
>
> Obviously these pages are treated as something different
> (PHP?).
>
> Any ideas to solve this? The HTML code is o.k., I think.

It doesn't matter whether or not the HTML code is OK. Even if you give
a ".html" extension to a file of completely random binary data, it
shouldn't cause an internal server error.

My suspicion is that the server has been configured to treat any
filename which contains[1] the string ".map" as a server-side image
map.

[1] as opposed to ending in ".map".

Thanks for the pointer. Looking into the config (not done by me) I
found:

grep map httpd.conf
LoadModule imap_module modules/mod_imap.so
AddModule mod_imap.c
Alias /tmp/ "/tmp/mapserver/"
<Directory "/tmp/mapserver/">
# AddHandler: allows you to map certain file extensions to "handlers",
# If you wish to use server-parsed imagemap files, use
AddHandler imap-file map

So the latter is suspicious. Next question is if I should
switch that handler off as we have the GRASS "mirrors" map:
http://grass.itc.it/index.html

On the apache docs I read "This module provides for server-side imagemap
processing."

I assume that this has nothing to do with our map, right?
Switching "AddHandler imap-file map" off should be fine?

Sorry for the naive questions,

Markus

6

Glynn Clements wrote:

> while looking at the HTML man pages:
> http://grass.itc.it/gdp/html_grass5/html/p.map.html
> http://grass.itc.it/gdp/html_grass5/html/p.map.new.html
>
> some strange output occurs:
> Menu for /gdp/html_grass5/html/p.map.html
>
> html
> [an internal server error occured]
>
> Obviously these pages are treated as something different
> (PHP?).
>
> Any ideas to solve this? The HTML code is o.k., I think.

It doesn't matter whether or not the HTML code is OK. Even if you give
a ".html" extension to a file of completely random binary data, it
shouldn't cause an internal server error.

My suspicion is that the server has been configured to treat any
filename which contains[1] the string ".map" as a server-side image
map.

[1] as opposed to ending in ".map".

Yes and no.

Yes: the server treats p.map.html as in imagemap (mod_imap).

No: you don't actually have to do anything special to get this
behaviour. I have exactly the same problem here, with a default Apache
1.3.14 setup.

The Apache documentation mentions the problem:

  http://httpd.apache.org/docs/mod/mod_mime.html#multipleext

I found that adding:

  AddHandler default-handler .html

to httpd.conf solves the problem, although it *might* interfere with
other uses of multiple extensions, e.g. as multi-language support (I
don't have anything like this here to test with).

--
Glynn Clements <glynn.clements@virgin.net>

7

Markus Neteler wrote:

> My suspicion is that the server has been configured to treat any
> filename which contains[1] the string ".map" as a server-side image
> map.
>
> [1] as opposed to ending in ".map".

Thanks for the pointer. Looking into the config (not done by me) I
found:

grep map httpd.conf
LoadModule imap_module modules/mod_imap.so
AddModule mod_imap.c
Alias /tmp/ "/tmp/mapserver/"
<Directory "/tmp/mapserver/">
# AddHandler: allows you to map certain file extensions to "handlers",
# If you wish to use server-parsed imagemap files, use
AddHandler imap-file map

So the latter is suspicious.

Yes, I've confirmed that as the cause.

Next question is if I should
switch that handler off as we have the GRASS "mirrors" map:
http://grass.itc.it/index.html

On the apache docs I read "This module provides for server-side imagemap
processing."

I assume that this has nothing to do with our map, right?

Right. That map is client-side.

Switching "AddHandler imap-file map" off should be fine?

Yes. Assuming that you don't have any ".map" files, there isn't much
point in enabling it.

The same applies to any other AddHandler directives, although the only
ones enabled by default are "map" and "shtml", and I doubt that any
filenames will "accidently" contain ".shtml".

--
Glynn Clements <glynn.clements@virgin.net>

8

On Thu, Jan 24, 2002 at 02:11:23PM +0000, Glynn Clements wrote:

Glynn Clements wrote:

> > while looking at the HTML man pages:
> > http://grass.itc.it/gdp/html_grass5/html/p.map.html
> > http://grass.itc.it/gdp/html_grass5/html/p.map.new.html
> >
> > some strange output occurs:
> > Menu for /gdp/html_grass5/html/p.map.html
> >
> > html
> > [an internal server error occured]
> >
> > Obviously these pages are treated as something different
> > (PHP?).
> >
> > Any ideas to solve this? The HTML code is o.k., I think.
>
> It doesn't matter whether or not the HTML code is OK. Even if you give
> a ".html" extension to a file of completely random binary data, it
> shouldn't cause an internal server error.
>
> My suspicion is that the server has been configured to treat any
> filename which contains[1] the string ".map" as a server-side image
> map.
>
> [1] as opposed to ending in ".map".

Yes and no.

Yes: the server treats p.map.html as in imagemap (mod_imap).

No: you don't actually have to do anything special to get this
behaviour. I have exactly the same problem here, with a default Apache
1.3.14 setup.

The Apache documentation mentions the problem:

  mod_mime - Apache HTTP Server Version 2.4

I found that adding:

  AddHandler default-handler .html

to httpd.conf solves the problem, although it *might* interfere with
other uses of multiple extensions, e.g. as multi-language support (I
don't have anything like this here to test with).

Glynn,

perfect solution:
http://grass.itc.it/gdp/html_grass5/html/p.map.html

Thanks for the quick help to you and the others.
Multi-language support is not yet implemented (hi, volunteers).

Thanks,

Markus