Forum OpenACS Q&A: Getting URL

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1: Getting URL
Posted by Alex Lloyd on 10/11/03 06:24 AM
Hi

I'm trying to find the command that will let me set to default URL path (http://127.0.0.1:8000)

Say I'm in the Notes package (http://127.0.0.1:8000/notes) and in one of my tcl files in the notes package i want to go directly to another package (say http://127.0.0.1:8000/forums) then how can i get there using this sort of command?

set url "<a href=\"/forums\">Forums</a>"

because when I put this in my adp file, it goes to: http://127.0.0.1:8000/notes/forums instead

Can anyone help?

Thanks, Alex

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2: Re: Getting URL (response to 1)
Posted by Tilmann Singer on 10/11/03 03:44 PM
First of all, try to avoid putting together html in tcl files when possible (yes there are tons of bad examples in the toolkit unfortunately). Rather do it like that:

.tcl:
set some_url "/foo"

.adp:
<a href="@some_url@">Bla</a>

You don't need to specify your servername in a link that refers to a location on the same server. And if your link starts with a slash then it starts to resolve from the server root, so your example '/forums' should actually work, you propably have a typo somewhere.

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3: Re: Getting URL (response to 1)
Posted by Pavel Boghita on 10/13/03 04:17 PM
my guess is that you could try:
# set url "<a href=\"../forums/">Forums</a>"
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4: Re: Getting URL (response to 3)
Posted by Pavel Boghita on 10/13/03 04:21 PM
what I meant above was use ../forums/ rather than /forums/ which will take you in /notes/forums/.
'..' stands for parent directory.
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5: Re: Getting URL (response to 4)
Posted by russ m on 10/14/03 03:11 AM
If you are in /notes/ and an URL links to /forums following that link will *not* take you to /notes/forums/ unless you're using a very broken browser (which would surprise me). If the link target starts with a slash it is locked to the root of the server URL tree.

Take a look at the source of the served HTML page where this link is - I'd be pretty confident that the link target is not actually coming through as "/forums"...

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6: Re: Getting URL (response to 1)
Posted by bill kellerman on 10/14/03 07:14 AM
Check the aolserver tcl api at http://www.aolserver.com/docs/devel/tcl/api/conn.html#ns_conn

From the docs:
"ns_conn location returns the location string for this virtual server in the form: protocol://hostname[:port]"

In your tcl file, set hostlocation [ns_conn location].
In your adp file, display <a href="@hostlocation@/forums/">mesgag ba0rd</a> for the appropriate location.

[note that ns_info location is obsolete.]

You can also use relative also as has been mentioned  (../forums, ../notes).

...might be a better way to do this.  check the genius bar.

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7: Re: Getting URL (response to 1)
Posted by Don Baccus on 10/14/03 10:11 AM
It's better to use ad_conn rather than ns_conn, that way you don't have to change your code if we later decide to massage the ns_conn value for OpenACS use (for those items which don't exist in ad_conn we pass through the ns_conn value).