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Posted to users@httpd.apache.org by Francis GALIEGUE <fg...@one2team.com> on 2009/12/04 14:18:09 UTC
Re: [users@httpd] Re: Ampersand extends to the left part of regexes
with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
On Fri, Dec 4, 2009 at 14:07, André Warnier <aw...@ice-sa.com> wrote:
[...]
> First, I believe that one mistake is to include the trailing question mark
> into the URL which you redirect.
> In http://my.server.com/foo/?var1=val1...
> The "?" is not actually part of the URI. It is a separator between the URI
> and the query string. So the URI to test is "/foo/", and not "/foo/?".
> Second, in "RedirectMatch", "RewriteCond" and "RewriteRule", the argument is
> a regexp, not a string. So when you write "/foo/?$", you mean actually :
> "/foo", possibly followed by "/", followed by the end of the string.
> If you really wanted to test for a "?", you would have to escape it as "\?".
>
> I do not know if this is the source of your particular problem, but it may
> contribute to the strange results which you are seeing later.
>
No, the ? is intended, I want to match either /foo or /foo/, so
^/foo/?$ is the correct regex, I'm sure about that.
The problem I have is with the & being systematically understood by
the right size of regexes to mean "the whole thing matched by the
matching left regex". While this is a common regex idiom in "basic"
regexes (sed acts this way for instance), it is not expected at all
from pcre (Perl doesn't know about &, and from what I've read about
pcre so far, pcre doesn't know about it either). Hence my puzzle.
--
Francis Galiegue
ONE2TEAM
Ingénieur système
Mob : +33 (0) 683 877 875
Tel : +33 (0) 178 945 552
fge@one2team.com
40 avenue Raymond Poincaré
75116 Paris
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Re: [users@httpd] Re: Ampersand extends to the left part of regexes
with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
Posted by Eric Covener <co...@gmail.com>.
On Tue, Dec 8, 2009 at 1:49 PM, Nick Kew <ni...@webthing.com> wrote:
> Rich Bowen wrote:
>
>>> If I file an issue on Apache's Bugzilla, will this be considered a bug?
>>
>> Please do submit it, but perhaps as a documentation bug? I'll try to
>> remember to add a mention of this to the documentation, but a bugzilla
>> ticket will help us remember.
>
> Is this really an Apache docs issue? It's down to the regexp library,
> so surely the correct documentation for httpd is a reference to PCRE
> (or Perl regexp) documentation?
Searching for this old thread, missed your followup niq. httpd was
stepping in the way and treating & as an alias for \0/$0 (entire
match):
http://svn.apache.org/viewvc?view=revision&revision=904765
There was some confusion ITT that Rewrite and mod_alias directives
were behaving the same way that I think was cleared up elsewhere.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] Re: Ampersand extends to the left part of regexes
with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
Posted by Nick Kew <ni...@webthing.com>.
Rich Bowen wrote:
>> If I file an issue on Apache's Bugzilla, will this be considered a bug?
>
> Please do submit it, but perhaps as a documentation bug? I'll try to
> remember to add a mention of this to the documentation, but a bugzilla
> ticket will help us remember.
Is this really an Apache docs issue? It's down to the regexp library,
so surely the correct documentation for httpd is a reference to PCRE
(or Perl regexp) documentation?
Apache could put this in a tutorial/guide, but not really in
reference docs. Is that what you meant?
--
Nick Kew
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Re: [users@httpd] Re: Ampersand extends to the left part of regexes with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
Posted by Rich Bowen <rb...@rcbowen.com>.
On Dec 8, 2009, at 08:20 , Francis GALIEGUE wrote:
> On Fri, Dec 4, 2009 at 14:39, Eric Covener <co...@gmail.com> wrote:
> [...]
>>>
>>> I think Apache is simulating perls $&, and I think it's on purpose.
>>> Seems pretty unwise.
>>
>> That is definitely the case.
>>
>
> If I file an issue on Apache's Bugzilla, will this be considered a
> bug?
Please do submit it, but perhaps as a documentation bug? I'll try to
remember to add a mention of this to the documentation, but a bugzilla
ticket will help us remember.
--
Rich Bowen
rbowen@rcbowen.com
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Re: [users@httpd] Re: Ampersand extends to the left part of regexes
with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
Posted by Eric Covener <co...@gmail.com>.
On Tue, Dec 8, 2009 at 8:20 AM, Francis GALIEGUE <fg...@one2team.com> wrote:
> On Fri, Dec 4, 2009 at 14:39, Eric Covener <co...@gmail.com> wrote:
> [...]
>>>
>>> I think Apache is simulating perls $&, and I think it's on purpose.
>>> Seems pretty unwise.
>>
>> That is definitely the case.
>>
>
> If I file an issue on Apache's Bugzilla, will this be considered a bug?
I'm still a little lost here as to why this isn't more of a FAQ if it
impacts including an ampersand in any RewriteRule substitution, so I
may be wrong in the analysis.
It's minimally a documentation bug.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] Re: Ampersand extends to the left part of regexes
with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
Posted by Francis GALIEGUE <fg...@one2team.com>.
On Fri, Dec 4, 2009 at 14:39, Eric Covener <co...@gmail.com> wrote:
[...]
>>
>> I think Apache is simulating perls $&, and I think it's on purpose.
>> Seems pretty unwise.
>
> That is definitely the case.
>
If I file an issue on Apache's Bugzilla, will this be considered a bug?
--
Francis Galiegue
ONE2TEAM
Ingénieur système
Mob : +33 (0) 683 877 875
Tel : +33 (0) 178 945 552
fge@one2team.com
40 avenue Raymond Poincaré
75116 Paris
---------------------------------------------------------------------
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See <URL:http://httpd.apache.org/userslist.html> for more info.
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" from the digest: users-digest-unsubscribe@httpd.apache.org
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Re: [users@httpd] Re: Ampersand extends to the left part of regexes
with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
Posted by Eric Covener <co...@gmail.com>.
On 12/4/09, Eric Covener <co...@gmail.com> wrote:
> On 12/4/09, Francis GALIEGUE <fg...@one2team.com> wrote:
>
> > The problem I have is with the & being systematically understood by
> > the right size of regexes to mean "the whole thing matched by the
> > matching left regex". While this is a common regex idiom in "basic"
> > regexes (sed acts this way for instance), it is not expected at all
> > from pcre (Perl doesn't know about &, and from what I've read about
> > pcre so far, pcre doesn't know about it either). Hence my puzzle.
>
>
> I think Apache is simulating perls $&, and I think it's on purpose.
> Seems pretty unwise.
That is definitely the case.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] Re: Ampersand extends to the left part of regexes
with RewriteRule, RedirectMatch and SetEnvIf: is that expected?
Posted by Eric Covener <co...@gmail.com>.
On 12/4/09, Francis GALIEGUE <fg...@one2team.com> wrote:
> The problem I have is with the & being systematically understood by
> the right size of regexes to mean "the whole thing matched by the
> matching left regex". While this is a common regex idiom in "basic"
> regexes (sed acts this way for instance), it is not expected at all
> from pcre (Perl doesn't know about &, and from what I've read about
> pcre so far, pcre doesn't know about it either). Hence my puzzle.
I think Apache is simulating perls $&, and I think it's on purpose.
Seems pretty unwise.
--
Eric Covener
covener@gmail.com
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