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Date: Wed, 11 Mar 2009 09:33:17 +0100
Message-ID: <6ed6382b0903110133pe595a1w8f772eebdf41bd81@mail.gmail.com>
From: Krist van Besien <krist.vanbesien@gmail.com>
To: users@httpd.apache.org
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Subject: Re: [users@httpd] Port-based vhosts

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On Wed, Mar 11, 2009 at 4:35 AM, Charles Sprickman <spork@bway.net> wrote:

>
> OK.  That makes perfect sense.  At this point, my main concern is actually
> understanding how this works.  When I was reading the docs on
> "UseCanonicalName" (
> http://httpd.apache.org/docs/2.2/mod/core.html#usecanonicalname) I noticed
> that reference is made to "self-referential" URLs.  Under what conditions
> does Apache then get involved and alter the URL?  Just redirects?  I
> understand a common redirect is just adding a trailing slash when the user
> does not supply it.  What are some other common cases? Who's call is it when
> a simple static site uses non-absolute URLs for all the links?  Is the
> browser building the fully-qualified links or apache (I suspect the former)?


Apache only gets involved in URLs it generates itself.

What is often misunderstood is the nature of what is in the address bar of
the browser. The address bar contains what the browser requested.  It cannot
be changed by the content of a webserver's response other than when the
response is "retry the request with this URL in stead". So the only way to
change the adres bar to change is to send a redirect.
There are a few cases where Apache will do this for you automatically. One
such case is when a user requests a directory, and apache generates a
directory index. This is the case that is mentioned in the docs you found.
However, in this case you will need to force a redirect yourself.

Krist


-- 
krist.vanbesien@gmail.com
krist@vanbesien.org
Bremgarten b. Bern, Switzerland
--
A: It reverses the normal flow of conversation.
Q: What's wrong with top-posting?
A: Top-posting.
Q: What's the biggest scourge on plain text email discussions?

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<br><br><div class=3D"gmail_quote">On Wed, Mar 11, 2009 at 4:35 AM, Charles=
 Sprickman <span dir=3D"ltr">&lt;<a href=3D"mailto:spork@bway.net">spork@bw=
ay.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"=
border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; paddi=
ng-left: 1ex;">
<div class=3D"im"><br></div>
OK. =A0That makes perfect sense. =A0At this point, my main concern is actua=
lly understanding how this works. =A0When I was reading the docs on &quot;U=
seCanonicalName&quot; (<a href=3D"http://httpd.apache.org/docs/2.2/mod/core=
.html#usecanonicalname" target=3D"_blank">http://httpd.apache.org/docs/2.2/=
mod/core.html#usecanonicalname</a>) I noticed that reference is made to &qu=
ot;self-referential&quot; URLs. =A0Under what conditions does Apache then g=
et involved and alter the URL? =A0Just redirects? =A0I understand a common =
redirect is just adding a trailing slash when the user does not supply it. =
=A0What are some other common cases? Who&#39;s call is it when a simple sta=
tic site uses non-absolute URLs for all the links? =A0Is the browser buildi=
ng the fully-qualified links or apache (I suspect the former)?</blockquote>
<div><br>=A0</div><div>Apache only gets involved in URLs it generates itsel=
f. <br><br>What is often misunderstood is the nature of what is in the addr=
ess bar of the browser. The address bar contains what the browser requested=
.=A0 It cannot be changed by the content of a webserver&#39;s response othe=
r than when the response is &quot;retry the request with this URL in stead&=
quot;. So the only way to change the adres bar to change is to send a redir=
ect.<br>
There are a few cases where Apache will do this for you automatically. One =
such case is when a user requests a directory, and apache generates a direc=
tory index. This is the case that is mentioned in the docs you found. <br>
However, in this case you will need to force a redirect yourself. <br><br>K=
rist<br></div></div><br clear=3D"all"><br>-- <br><a href=3D"mailto:krist.va=
nbesien@gmail.com">krist.vanbesien@gmail.com</a><br><a href=3D"mailto:krist=
@vanbesien.org">krist@vanbesien.org</a><br>
Bremgarten b. Bern, Switzerland<br>--<br>A: It reverses the normal flow of =
conversation.<br>Q: What&#39;s wrong with top-posting?<br>A: Top-posting.<b=
r>Q: What&#39;s the biggest scourge on plain text email discussions?<br>


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