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Home > Archive > Apache Server configuration support > February 2006 > HTTP_COOKIE problem
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HTTP_COOKIE problem
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| manoj.agarwal.in@gmail.com 2006-02-21, 7:50 am |
| Hi
I want to do some hash on the HTTP_COOKIE string which gives me a value
between 1 to 1000. For this I have written a PERL script. Now I want to
call this PERL script in my rewrite.conf (rewrite rule file) file in
apache. I am using RewriteMap for this but haven't succeeded. May be I
haven't understood using rewritemap well.
So my question is:
a. Can I reset my HTTP_COOKIE value in the rewrite.conf file?
b. Would calling a PERL script be a good idea for this or is there any
other way around?
c. Can I write the logic of hashing within my conf file?
My conf file looks like:
RewriteMap cookie1 prg:/home/y/share/htdocs/cookie1.pl
RewriteRule ^/(index.html)?$ ${bcookie:$1} [L,PT]
Am I doing something wrong in this?
rgds
Manoj
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| Duikboot 2006-02-21, 7:50 am |
| I am not sure, but shouldn't the rewrite rules be in a .htaccess file or
in the httpd.conf?
greetings,
Duikboot
manoj.agarwal.in@gmail.com wrote:
> Hi
>
> I want to do some hash on the HTTP_COOKIE string which gives me a value
> between 1 to 1000. For this I have written a PERL script. Now I want to
> call this PERL script in my rewrite.conf (rewrite rule file) file in
> apache. I am using RewriteMap for this but haven't succeeded. May be I
> haven't understood using rewritemap well.
> So my question is:
>
> a. Can I reset my HTTP_COOKIE value in the rewrite.conf file?
> b. Would calling a PERL script be a good idea for this or is there any
> other way around?
> c. Can I write the logic of hashing within my conf file?
>
>
> My conf file looks like:
>
> RewriteMap cookie1 prg:/home/y/share/htdocs/cookie1.pl
> RewriteRule ^/(index.html)?$ ${bcookie:$1} [L,PT]
>
> Am I doing something wrong in this?
>
> rgds
> Manoj
>
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| Robert Ionescu 2006-02-21, 5:56 pm |
| Duikboot wrote:
> I am not sure, but shouldn't the rewrite rules be in a .htaccess file or
> in the httpd.conf?
httpd.conf should be always preferred for a better performance because
the RegEx is only compiled once at startup and not per each processing
of the .htaccess file. A RewriteMap cannot be defined in per-dir
context, so the directive must be placed in per-server context (main
server config section or virtualhost).
-> Avoid .htaccess files, if possible.
--
Robert
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| Robert Ionescu 2006-02-21, 5:56 pm |
| manoj.agarwal.in@gmail.com wrote:
> a. Can I reset my HTTP_COOKIE value in the rewrite.conf file?
Some environmental variables (i.e. document_root) cannot be changed via
the E-Flag or mod_setenv(if).
The RewriteMap only returns a value which is being insert here in the
substitution. I don't think that you can manipulate ENVs from the prg
lookup script.
The manual states this:
| For each map-function lookup it will receive the key to lookup as a
| newline-terminated string on stdin. It then has to give back the
| looked-up value as a newline-terminated string on stdout
Three options I can think of:
-> You're writing an other int function in mod_rewrite.c from where you
should have access to all apache internals
-> You can try to use the E-flag to set a ENV but as I said, i don't
think that you can override this variable here like
# escape literal periods
RewriteRule ^/(index\.html)?$ - [E=HTTP_COOKIE:${bcookie:$1}]
or if you can't place a map lookup within the E-flag (it's not
documented), I'd use something like
RewriteCond ${bcookie:$1} ^(.*)
RewriteRule ^/(index\.html)?$ - [E=HTTP_COOKIE:%1]
-> You're rewriting to some cgi-script which changes the variables and
then execute a program which returns some output like
exec /usr/bin/php ...somepath...
The difference here is you're in the last step of the processing
(content handler).
> Now I want to call this PERL script in my rewrite.conf (rewrite rule
> file) file in apache.
Make sure that the rules are being executed, i.e. if you're using
virtualhosts, you must place the rules there, or you use
| RewriteEngine on
| RewriteOptions inherit
in your <virtualhost> to include/execute the rules from the main server
config section.
In order to check if the rules are being processed, I'd use a RewriteLog.
--
Robert
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