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From: "Brian A. Davis" <bridavis3@gmail.com>
Date: Thu, 25 Aug 2016 15:59:06 -0400
Message-ID: <CAPBjAUhSrwwEFC3WQUyM3Gf=PXCT9TVViqk5yELyRO+dVppt6Q@mail.gmail.com>
To: users@httpd.apache.org
Content-Type: multipart/alternative; boundary=001a113e9d3492cea1053aead4f3
Subject: [users@httpd] Regex fails to complie
archived-at: Thu, 25 Aug 2016 19:59:13 -0000

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Hello,

I'm trying to reject requests hitting my apache proxy which are NOT going
to *.foo.com, *.foo.com:443 or *.foo.com/blahblahblah. I'm trying to avoid
bogus requests like foo.com.baddomain.com.

The regex I'm using is:

\.foo.com(?:\:\d{2,5}|\/.*)?$

This is working exactly how I want on https://regex101.com/r/tE4pM2/1, but
when I put this into my apache config:

<If "%{REQUEST_URI} =~ /\.foo.com(?:\:\d{2,5}|\/.*)?$/">

I get the following error:

httpd[3704]: AH00526: Syntax error on line 179 of
/etc/httpd/conf/httpd.conf:
httpd[3704]: Cannot parse condition clause: Failed to compile regular
expression

Is apache limited in the regex support that it has?

httpd -v
Server version: Apache/2.4.6 (CentOS)
Server built:   Nov 19 2015 21:43:13

Thanks,
Brian

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<div dir=3D"ltr">Hello,<div><br></div><div>I&#39;m trying to reject request=
s hitting my apache proxy which are NOT going to *.<a href=3D"http://foo.co=
m">foo.com</a>, *.<a href=3D"http://foo.com:443">foo.com:443</a> or *.<a hr=
ef=3D"http://foo.com/blahblahblah">foo.com/blahblahblah</a>. I&#39;m trying=
 to avoid bogus requests like <a href=3D"http://foo.com.baddomain.com">foo.=
com.baddomain.com</a>.</div><div><br></div><div>The regex I&#39;m using is:=
</div><div><br></div><div>\.<a href=3D"http://foo.com">foo.com</a>(?:\:\d{2=
,5}|\/.*)?$<br></div><div><br></div><div>This is working exactly how I want=
 on=C2=A0<a href=3D"https://regex101.com/r/tE4pM2/1">https://regex101.com/r=
/tE4pM2/1</a>, but when I put this into my apache config:</div><div><br></d=
iv><div>&lt;If &quot;%{REQUEST_URI} =3D~ /\.<a href=3D"http://foo.com">foo.=
com</a>(?:\:\d{2,5}|\/.*)?$/&quot;&gt;<br></div><div><br></div><div>I get t=
he following error:</div><div><br></div><div>httpd[3704]: AH00526: Syntax e=
rror on line 179 of /etc/httpd/conf/httpd.conf:<br></div><div>httpd[3704]: =
Cannot parse condition clause: Failed to compile regular expression<br></di=
v><div><br></div><div>Is apache limited in the regex support that it has?</=
div><div><br></div><div><div>httpd -v</div><div>Server version: Apache/2.4.=
6 (CentOS)</div><div>Server built: =C2=A0 Nov 19 2015 21:43:13</div></div><=
div><br></div><div>Thanks,<br>Brian</div></div>

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