You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@httpd.apache.org by Victor Porton <po...@narod.ru> on 2009/09/15 12:41:23 UTC
[users@httpd] Word boundaries in regexps (Apache bug?)
Apache 2.2.13
http://localhost/test.shtml?city
Test 1 passed. Test 2 failed.
test.shtml follows
<<<<
<!--#if expr="$QUERY_STRING = /city/" -->
Test 1 passed.
<!--#else -->
Test 1 failed.
<!--#endif -->
<!--#if expr="$QUERY_STRING = /\bcity\b/" -->
Test 2 passed.
<!--#else -->
Test 2 failed.
<!--#endif -->
>>>>
So test 2 is failed.
Why \b for word boundaries doesn't work?
Is it a bug of Apache? How I specify word boundaries in regexps?
--
Victor Porton - http://portonvictor.org
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by Torsten Foertsch <to...@gmx.net>.
On Tue 15 Sep 2009, Nick Kew wrote:
> > /\\bcity\\b/ works on my localhost (Debian Linux with Apache
> > 2.2.13-1),
>
> Good. Mystery solved (though I have to confess I'm a little
> surprised you need that in the context).
Here is the piece of code that (I believe) eats the backslashes (mod_include.c:
get_ptoken()). token->value is the start of the string, p the end. shift is
the number of unescaped backslashes found in the string.
apr_size_t len = p - token->value - shift;
char *c = apr_palloc(ctx->dpool, len + 1);
p = token->value;
token->value = c;
while (shift--) {
const char *e = ap_strchr_c(p, '\\'); /* move e to the next backslash */
memcpy(c, p, e-p); /* copy up to the backslash excluding it */
c += e-p; /* now c points to the end of the destination string */
*c++ = *++e; /* copy there the char that comes *after* the '\' and forget about the '\' */
len -= e-p;
p = e+1;
}
if (len) {
memcpy(c, p, len);
}
c[len] = '\0';
Torsten
--
Need professional mod_perl support?
Just hire me: torsten.foertsch@gmx.net
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by Nick Kew <ni...@webthing.com>.
Victor Porton wrote:
> On Tue, 2009-09-15 at 15:05 +0200, Torsten Foertsch wrote:
>> On Tue 15 Sep 2009, Victor Porton wrote:
>>>> <!--#if expr="$QUERY_STRING = /(^|\b)city(\b|$)/" -->
>>> After this change the test 2 passes, but it does not pass if I enter
>>> http://localhost/test2.shtml?city=2
>> Perhaps you have to outwit the SSI string parser. Just a guess:
>>
>> <!--#if expr="$QUERY_STRING = /\\bcity\\b/" -->
>
> /\\bcity\\b/ works on my localhost (Debian Linux with Apache 2.2.13-1),
Good. Mystery solved (though I have to confess I'm a little
surprised you need that in the context).
> but does not work on http://logostudio.co.il/test.html?city with Apache
> 1.3.41 (FreeBSD).
As I told you earlier on IRC, 1.3 used a pre-PCRE regexp engine.
--
Nick Kew
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by Victor Porton <po...@narod.ru>.
On Tue, 2009-09-15 at 15:05 +0200, Torsten Foertsch wrote:
> On Tue 15 Sep 2009, Victor Porton wrote:
> > > <!--#if expr="$QUERY_STRING = /(^|\b)city(\b|$)/" -->
> >
> > After this change the test 2 passes, but it does not pass if I enter
> > http://localhost/test2.shtml?city=2
>
> Perhaps you have to outwit the SSI string parser. Just a guess:
>
> <!--#if expr="$QUERY_STRING = /\\bcity\\b/" -->
/\\bcity\\b/ works on my localhost (Debian Linux with Apache 2.2.13-1),
but does not work on http://logostudio.co.il/test.html?city with Apache
1.3.41 (FreeBSD).
--
Victor Porton - http://portonvictor.org
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by André Warnier <aw...@ice-sa.com>.
Torsten Foertsch wrote:
> Привет,
>
> On Tue 15 Sep 2009, Victor Porton wrote:
>>> <!--#if expr="$QUERY_STRING = /(^|\b)city(\b|$)/" -->
>> After this change the test 2 passes, but it does not pass if I enter
>> http://localhost/test2.shtml?city=2
>
> Perhaps you have to outwit the SSI string parser. Just a guess:
>
> <!--#if expr="$QUERY_STRING = /\\bcity\\b/" -->
>
Yep, my bet would be on that one too right now.
If not, (but admittedly we can keep going on like this) :
<!--#if expr="$QUERY_STRING = /(^|\b)city(\b|$|=)/" -->
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by Torsten Foertsch <to...@gmx.net>.
Привет,
On Tue 15 Sep 2009, Victor Porton wrote:
> > <!--#if expr="$QUERY_STRING = /(^|\b)city(\b|$)/" -->
>
> After this change the test 2 passes, but it does not pass if I enter
> http://localhost/test2.shtml?city=2
Perhaps you have to outwit the SSI string parser. Just a guess:
<!--#if expr="$QUERY_STRING = /\\bcity\\b/" -->
Torsten
--
Need professional mod_perl support?
Just hire me: torsten.foertsch@gmx.net
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by Victor Porton <po...@narod.ru>.
On Tue, 2009-09-15 at 13:29 +0200, André Warnier wrote:
> Tom Evans wrote:
> > On Tue, 2009-09-15 at 12:52 +0200, André Warnier wrote:
> >> Victor Porton wrote:
> >> ...
> >>> <!--#if expr="$QUERY_STRING = /city/" -->
> >> I am not sure which add-on module of Apache, and which version you are
> >> talking about, but are you sure that the above right-hand side is
> >> interpreted as a regexp, as opposed to a simple string ?
> >> Can you point us to the relevant documentation ?
> >>
> >>
> >>
> >
> > http://httpd.apache.org/docs/2.2/mod/mod_include.html#flowctrl
> >
> > string1 = string2
> > string1 == string2
> > string1 != string2
> >
> > Compare string1 with string2. If string2 has the form /string2/
> > then it is treated as a regular expression. Regular expressions
> > are implemented by the PCRE engine and have the same syntax as
> > those in perl 5. Note that == is just an alias for = and behaves
> > exactly the same way.
> >
> > No idea why it isn't working for him.
> >
> Allright then. And neither have I.
> Victor, what about this for test #2 :
> <!--#if expr="$QUERY_STRING = /(^|\b)city(\b|$)/" -->
After this change the test 2 passes, but it does not pass if I enter
http://localhost/test2.shtml?city=2
(I need it to pass in this case also.)
BTW, I am about Apache 2.2.13 Linux.
--
Victor Porton - http://portonvictor.org
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by André Warnier <aw...@ice-sa.com>.
Tom Evans wrote:
> On Tue, 2009-09-15 at 12:52 +0200, André Warnier wrote:
>> Victor Porton wrote:
>> ...
>>> <!--#if expr="$QUERY_STRING = /city/" -->
>> I am not sure which add-on module of Apache, and which version you are
>> talking about, but are you sure that the above right-hand side is
>> interpreted as a regexp, as opposed to a simple string ?
>> Can you point us to the relevant documentation ?
>>
>>
>>
>
> http://httpd.apache.org/docs/2.2/mod/mod_include.html#flowctrl
>
> string1 = string2
> string1 == string2
> string1 != string2
>
> Compare string1 with string2. If string2 has the form /string2/
> then it is treated as a regular expression. Regular expressions
> are implemented by the PCRE engine and have the same syntax as
> those in perl 5. Note that == is just an alias for = and behaves
> exactly the same way.
>
> No idea why it isn't working for him.
>
Allright then. And neither have I.
Victor, what about this for test #2 :
<!--#if expr="$QUERY_STRING = /(^|\b)city(\b|$)/" -->
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by Tom Evans <te...@googlemail.com>.
On Tue, 2009-09-15 at 12:52 +0200, André Warnier wrote:
> Victor Porton wrote:
> ...
> >
> > <!--#if expr="$QUERY_STRING = /city/" -->
>
> I am not sure which add-on module of Apache, and which version you are
> talking about, but are you sure that the above right-hand side is
> interpreted as a regexp, as opposed to a simple string ?
> Can you point us to the relevant documentation ?
>
>
>
http://httpd.apache.org/docs/2.2/mod/mod_include.html#flowctrl
string1 = string2
string1 == string2
string1 != string2
Compare string1 with string2. If string2 has the form /string2/
then it is treated as a regular expression. Regular expressions
are implemented by the PCRE engine and have the same syntax as
those in perl 5. Note that == is just an alias for = and behaves
exactly the same way.
No idea why it isn't working for him.
Cheers
Tom
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Word boundaries in regexps (Apache bug?)
Posted by André Warnier <aw...@ice-sa.com>.
Victor Porton wrote:
...
>
> <!--#if expr="$QUERY_STRING = /city/" -->
I am not sure which add-on module of Apache, and which version you are
talking about, but are you sure that the above right-hand side is
interpreted as a regexp, as opposed to a simple string ?
Can you point us to the relevant documentation ?
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org