A HTTACCESS challenge for Webmeisters!

[Manotea]

Hi chaps,

A httaccess challenge for the webmeisters....

I have a URL that looks like: example.com/foo/?parm1=xxxxx.

I want to rewrite it such that if  /?parm1 is supplied it becomes example.com/foo/bah/?parm2=xxxxx

If /?parm1 is not supplied then it should remain as example.com/foo.

So the aim is, if Parm1 is supplied, to inject a folder into the path and rename Parm1 to Parm2

Bonus points for making the URL rewrite 'invisible', i.e., the user sees the original URL only

I tried Stack Overflow but the only responses I received were to correct my grammar and an instruction to RTFM. 

Ta

[pcolbeck]

Something like:

RewriteRule    ^?parm1=xxxxx$    bah/?parm2=xxxxx     [NC,L]

Should only do the rewrite if it there is a match on "parm1=xxxxx"in the url and shouldn't change the url in the browser.

This assumes that xxxx is always what is supplied with parm1.
Is parm1 a variable ie can it be any four characters instead of xxxx?

[grams]

This answer covers the same thing:
https://stackoverflow.com/questions/7234005/rewritecond-for-url-with-parameters

Basically you need a rewritecond for just the subset of urls you want to worry about, a rewritecond to test for the presence of the parameter, and finally a rule that does the rewriting.

Completely untested, and it's been literally years since I did this stuff in anger:

RewriteCond %{REQUEST_URI} ^/foo/
RewriteCond %{QUERY_STRING} ^parm1=(.*)
RewriteRule (.*) /foo/bah/?parm2=%1?

The above probably won't work if you're expecting the incoming URL to contain more than one parameter.

[FifeingEejit]

I tried Stack Overflow but the only responses I received were to correct my grammar and an instruction to RTFM. 

well.... at least you're not being asked WTF are you using ColdFusion  and then being given answers on how to do it in Perl.

[Manotea]

This answer covers the same thing:
https://stackoverflow.com/questions/7234005/rewritecond-for-url-with-parameters

Basically you need a rewritecond for just the subset of urls you want to worry about, a rewritecond to test for the presence of the parameter, and finally a rule that does the rewriting.

Completely untested, and it's been literally years since I did this stuff in anger:

RewriteCond %{REQUEST_URI} ^/foo/
RewriteCond %{QUERY_STRING} ^parm1=(.*)
RewriteRule (.*) /foo/bah/?parm2=%1?

The above probably won't work if you're expecting the incoming URL to contain more than one parameter.

Thanks all... this looks like it ought to work yet doesnt... I suspect other rules are getting in the way. Need to experiment more or failing that, RTFM