mod_rewrite and mod_alias

mehrdadabed · May 13, 2016

Hi,

I'm using litespeed over Directadmin and use "Apache Configuration File" for vhosts configurations,

I just define this alise rules in apache config file:

Alias /TestURI "/var/www/html/test.html"

mentioned rules function properly when I use it directly by a domain,

Code:

http://www.domain.com/TestURI

(it shows the content of /var/www/html/test.html which is ok)

but alias rules don't work when I call them from a "mod_rewrite" rule, something like this:

RewriteEngine On
RewriteRule .* /TestURI [L]

(mentioned rule is returned by a "404 not found" error)

seems that "mod_alias" are loaded after "mod_rewrite" ones,
Since mentioned rules are working fine in Apache web service, it there any chance to have them work in litespeed as well?

Thanks,

NiteWave · May 14, 2016

my tests shows that apache will return 500 error for that rewriterule. while lsws will return 404 Not Found

here's detail:

Code:

/var/www/html>cat .htaccess
#Options Indexes
RewriteEngine On
RewriteRule .* /TestURI [L]
#RewriteRule .* /TestURI [PT]

/var/www/html>ls -al
drwxr-xr-x 11 root root 4096 May 14 03:34 .
drwxr-xr-x  7 root root 4096 Jun 15  2015 ..
-rw-r--r--  1 root root   92 May 14 03:32 .htaccess
-rw-r--r--  1 root root    0 Sep  8  2014 index.html
-rw-r--r--  1 root root    0 May 14 03:19 test.html

/var/www/html>curl -I 127.0.0.1/test2.html
HTTP/1.1 500 Internal Server Error
Date: Sat, 14 May 2016 07:53:03 GMT
Server: Apache/2.2.15 (CentOS)
Connection: close
Content-Type: text/html; charset=iso-8859-1

/var/www/html>curl -I 127.0.0.1:2080/test2.html
HTTP/1.1 404 Not Found
Date: Sat, 14 May 2016 07:53:14 GMT
Accept-Ranges: bytes
Server: LiteSpeed
Connection: Keep-Alive

mehrdadabed · May 14, 2016

thanks for your time and attention,

let me explain the issue in more detail,
Assume that, we have this shared account here (based on direct-admin shared hosting structure):

/home/accountname/domains/domain.com/public_html/

(our account name is accountname and the domain is domain.com )

this alias rule also has been defined in main apache config httpd.conf:

Alias /TestURI "/var/www/html/test.html"

(actually it makes all

Code:

http://domain.com/TestURI

to show the content of /var/www/html/test.html )
the content of "/home/accountname/domains/domain.com/public_html/.htaccess" is as follow:

RewriteEngine On
RewriteRule PublicLink /TestURI [L]

(this should make this address

Code:

http://domain.com/PublicLink

shows the content of

Code:

http://domain.com/TestURI

which will be /var/www/html/test.html )

here is the results:
-------------------------------
# curl -I domain.com/TestURI (this is fine)
HTTP/1.1 200 OK
Content-Type: text/html
Date: Sat, 14 May 2016 09:24:15 GMT
Accept-Ranges: bytes
Server: LiteSpeed
Connection: close

# curl -I domain.com/PublicLink (this should show the contents of /var/www/html/test.html )
HTTP/1.1 404 Not Found
Cache-Control: public, max-age=60
Expires: Sat, 14 May 2016 09:25:01 GMT
Content-Type: text/html; charset=utf-8
Date: Sat, 14 May 2016 09:24:01 GMT
Accept-Ranges: bytes
Server: LiteSpeed
Connection: close

thanks,
Abed.

NiteWave · May 14, 2016

yes, my test result is same as yours regarding litespeed.

my point is: what's the test result under apache ?
while litespeed return "404 Not Found"
apache return "500 Internal Server Error"

because of the rewriterule
RewriteRule PublicLink /TestURI [L]

it looks apache not meet your expectation either. and "404 Not Found" is a bit better than "500 Internal Server Error" in user's point of view.

mehrdadabed · May 14, 2016

Thanks again for your time,

the apache result is "200 OK" for both URLs:

domain.com/TestURI ("200 OK" in apache)
domain.com/PublicLink ("200 OK" in apache)

but litespeed return "404 Not Found" for the url that matches mod_rewrite rules:

domain.com/TestURI ("200 OK" in LiteSpeed)
domain.com/PublicLink ("404 Not Found" in LiteSpeed)

as far as I checked the litespeed logs, seems that the "context" dosent change to "/var/www/html/" (or alias doesnt work) when it's loaded from a mod_rewrite rule,

thanks,

NiteWave · May 14, 2016

there is no difference for domain.com/TestURI between apache and litespeed. both are "200 OK"

I don't use DirectAdmin, but apache with simplest config file.
as you see above my test, the apache version is 2.2.15. your apache's version ? 2.4.x ?

you can enable apache's rewrite log, then access domain.com/PublicLink, to know the detail rewrite info.

mehrdadabed · May 15, 2016

Sure,

here is the logs:

apache 2.4 logs:

# curl domain.com/PublicLink -I
HTTP/1.1 200 OK
Date: Sat, 14 May 2016 23:08:06 GMT
Server: Apache
Last-Modified: Sat, 14 May 2016 22:50:48 GMT
ETag: "c-532d538f8d4d7"
Accept-Ranges: bytes
Content-Length: 12
Vary: User-Agent
Content-Type: text/html

mod rewirte log:

Code:

[Sun May 15 03:22:01.818444 2016] [rewrite:trace2] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#70d2a00/initial] init rewrite engine with requested uri /PublicLink
[Sun May 15 03:22:01.818481 2016] [rewrite:trace1] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#70d2a00/initial] pass through /PublicLink
[Sun May 15 03:22:01.819927 2016] [rewrite:trace3] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#70d2a00/initial] [perdir /home/accountname/domains/domain.com/public_html/] strip per-dir prefix: /home/accountname/domains/domain.com/public_html/PublicLink -> PublicLink
[Sun May 15 03:22:01.819952 2016] [rewrite:trace3] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#70d2a00/initial] [perdir /home/accountname/domains/domain.com/public_html/] applying pattern 'PublicLink' to uri 'PublicLink'
[Sun May 15 03:22:01.819971 2016] [rewrite:trace2] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#70d2a00/initial] [perdir /home/accountname/domains/domain.com/public_html/] rewrite 'PublicLink' -> '/TestURI'
[Sun May 15 03:22:01.819989 2016] [rewrite:trace2] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#70d2a00/initial] [perdir /home/accountname/domains/domain.com/public_html/] trying to replace context docroot /home/accountname/domains/domain.com/public_html with context prefix
[Sun May 15 03:22:01.820005 2016] [rewrite:trace1] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#70d2a00/initial] [perdir /home/accountname/domains/domain.com/public_html/] internal redirect with /TestURI [INTERNAL REDIRECT]
[Sun May 15 03:22:01.820114 2016] [rewrite:trace2] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#710ed60/initial/redir#1] init rewrite engine with requested uri /TestURI
[Sun May 15 03:22:01.820144 2016] [rewrite:trace1] [pid 18162] mod_rewrite.c(476): [client x.x.x.x:45540] x.x.x.x - - [domain.com/sid#43be038][rid#710ed60/initial/redir#1] pass through /TestURI

LiteSpeed logs:

# curl domain.com/PublicLink -I
HTTP/1.1 404 Not Found
Cache-Control: public, max-age=60
Expires: Sat, 14 May 2016 23:11:13 GMT
Content-Type: text/html; charset=utf-8
Date: Sat, 14 May 2016 23:10:13 GMT
Accept-Ranges: bytes
Server: LiteSpeed
Connection: close

litespeed error log (domain.com/PublicLink):

Code:

2016-05-15 03:31:39.373 [DEBUG] [y.y.y.y:80] New connection from x.x.x.x:51337, concurrent: 0.
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] concurrent conn: 1
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] NtwkIOLink::handleEvents() events=1!
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] HttpSession::onReadEx(), state: 1!
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] readToHeaderBuf().
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] Read from client: 407
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] read 407 bytes to header buffer
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] client accept GZIP encoding.
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] processHeader() return 0, header state: 3.
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] readToHeaderBuf() return 0.
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] processNewReq(), request header buffer size: 411, header used: 411, processed: 411.
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337] Headers: GET /PublicLink HTTP/1.1
2016-05-15 03:31:39.373 [NOTICE] [x.x.x.x:51337#APVH_www.domain.com] Content len: 0, Request line: 'GET /PublicLink HTTP/1.1'
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] NtwkIOLink::suspendRead()...
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Find context with URI: [/], location: [/home/accountname/domains/domain.com/public_html/]
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Find .htaccess context with URI: [/], location: [/home/accountname/domains/domain.com/public_html/]
2016-05-15 03:31:39.373 [INFO] [x.x.x.x:51337#APVH_www.domain.com] File not found [/home/accountname/domains/domain.com/public_html/TestURI]
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] processContextPath() return 26
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] processNewReq() return 26.
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] HttpSession::sendHttpError(),code=404 Not Found
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] redirect to: URI=[/404.shtml], QueryString=[]
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Find .htaccess context with URI: [/], location: [/home/accountname/domains/domain.com/public_html/]
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Error Page, processContextPath() return 0
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] processContextPath() return 0
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] content type: [text/html], pMIME: 0x124fe40
2016-05-15 03:31:39.373 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] gzip flag: 3
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] GZIP response body!
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] setupGzipBuf() begin GZIP stream.
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] SSI Process component: 0, offset: 0 , len: 144
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Append pre-compressed: 121, Dyn resp body size: 131.
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] SSI Process component: 2, offset: 0 , len: 0
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Dyn resp body size: 131.
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] SSI Process component: 0, offset: 175 , len: 39
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] SSI Process component: 2, offset: 0 , len: 0
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Dyn resp body size: 131.
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] SSI Process component: 0, offset: 243 , len: 272
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Append pre-compressed: 28, Dyn resp body size: 226.
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] endResponse( 1 )
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] endResponseInternal()
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] endResponse() end GZIP stream.
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] HttpSession::flush()!
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] NtwkIOLink written: 547
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] writeRespBody() sent: 236
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] writeRespBody() return 236, Dyn response body sent: 236
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] flushBody() return 0
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] mark COMPLETE.
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] NtwkIOLink::continueWrite()...
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] write resumed!
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] NtwkIOLink::handleEvents() events=4!
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] HttpSession::nextRequest()!
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Non-KeepAlive, CLOSING!
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] NtwkIOLink::suspendWrite()...
2016-05-15 03:31:39.374 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Shutting down out-bound socket ...
2016-05-15 03:31:39.388 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] NtwkIOLink::handleEvents() events=16!
2016-05-15 03:31:39.388 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Close socket ...
2016-05-15 03:31:39.388 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Available Connections: 4850, concurrent conn: 0
2016-05-15 03:31:39.388 [DEBUG] [x.x.x.x:51337#APVH_www.domain.com] Recycle NtwkIoLink

NiteWave · May 15, 2016

installed apache 2.4.6 and confirmed your result. also did some other testings.

my test result so far:
1. in httpd.conf, put in
Alias /TestURI "/var/www/html/test.html"

2. in .htaccess, put in
RewriteEngine On
RewriteRule PublicLink /TestURI [L]

then when access domain.com/PublicLink
a)apache 2.2 -- 500 Internal Error
b)apache 2.4 -- 200 OK
c)lsws --- 404 Not Found

3. in httpd.conf, within <VirtualHost> block, put in
RewriteEngine On
RewriteRule /PublicLink /TestURI [L]

then when access domain.com/PublicLink
a)apache 2.2 -- 500 Internal Error
b)apache 2.4 -- 404 Not Found
c)lsws --- 200 OK

4. in httpd.conf, within <VirtualHost> block, put in
RewriteEngine On
RewriteRule /PublicLink /TestURI [L,PT]

then when access domain.com/PublicLink
a)apache 2.2 -- 500 Internal Error
b)apache 2.4 -- 200 OK
c)lsws --- 200 OK

mehrdadabed · May 15, 2016

thank you for your consideration,
that's true, seems that mentioned mod_rewrite rules work only when they are entered directly in "VirtualHost" tag in litespeed,
as far as I checked, the rules not working even in "directory" or "location" tags as well,
is there any chance to have them work in ".htaccess" or in tag "directory"?

NiteWave · May 15, 2016

I didn't test those reweiterule under <DIrectory>, search apache document, it's valid -- I haven't experienced this case before ( rewrite rule inside <Directory> block), I believe this is vary rare case in practice.

anyway I did tests, my result:
5. in httpd.conf, within <Directory /var/www/html> block, put in
RewriteEngine On
RewriteRule dir.* /TestURI [L]
or
RewriteEngine On
RewriteRule dir.* /TestURI [L,PT]

then when access domain.com/dirxxxx
a)apache 2.2 -- 500 Internal Error
b)apache 2.4 -- 404 Not Found
c)lsws --- 404 Not Found

can you verify above result on apache 2.4 ? if so, even apache 2.4 have implemented this feature yet.

based on the facts we have discussed above, I don't think update lsws code here is feasible although this will be decided by developer.

the practical advice for you:
1, use above option 4. so it's working on both lsws and apache 2.4
or
2. use other solution which is easy to maintain, and compatible with apache 2.2 / 2.4 / lsws.

mehrdadabed · May 15, 2016

thanks,

Please notice that if you use these rules in a <directory> tag:

RewriteEngine On
RewriteRule dir.* /TestURI [L]

then you have to disable (or remove) mod_rewrite rules in ".htaccess" otherwise all the configuration will be overwritten by the ones in .htaccess.

as far as I checked mentioned rules (in tag <directory>) works in apache 2.4 (I dont have apache 2.2 to test on this version), they dont work in lsws,

thanks again,

NiteWave · May 16, 2016

I did tests again under apache 2.4, my results shows
if <Directory> inside <VirtualHost>. then return "200 OK"
if out of <VirtualHost> (server level <Directory>), then return "404 Not Found"

<VirtualHost *:80>
DocumentRoot /var/www/html

<Directory "/var/www/html/sub">
RewriteEngine On
RewriteRule dir.* /TestURI [L]
</Directory>

</VirtualHost>
then domain.com/sub/dirxxxx
return "200 OK" in apache 2.4

I have changed the test URL in .htaccess as below:
/var/www/html>cat .htaccess
RewriteEngine On
RewriteRule ht.* /TestURI [L]

so test URL under <Directory> , use domain.com/sub/dirxxx
test URL in .htaccess, use domain.com/htxyz

mod_rewrite and mod_alias

mehrdadabed

Active Member

NiteWave

Administrator

mehrdadabed

Active Member

NiteWave

Administrator

mehrdadabed

Active Member

NiteWave

Administrator

mehrdadabed

Active Member

NiteWave

Administrator

mehrdadabed

Active Member

NiteWave

Administrator

mehrdadabed

Active Member

NiteWave

Administrator