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How can I rewrite this url api.domain.com/v1/json/account?id=123 to api.domain.com?id=123&v=v1&f=json&t=account

RewriteCond %{HTTP_HOST}        ^(api)\.[^\.]+\.[^\.]+$ [NC]
RewriteCond %{REQUEST_URI}      ^/([^/]+)/([^/]+)/([^/]+)/?(\?%{QUERY_STRING})?$ [NC]
RewriteRule ^(.*)$              /?%{QUERY_STRING}&v=%1&f=%2&t=%3 [L]
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1) Do you need to have that check for specific domain name (just asking); 2) Do you need to redirect ONLY this SPECIFIC URL (I mean, v1 always be v1, json always be json) or you need a bit more generic rule (where json may become xml); 3) Why QSA flag is not good (are you afraid that user may provide his own &v= value etc? 4) Where this rule will be placed -- in .htaccess or in config file (e.g. <VirtualHost> section)? 5) You want rewrite, not redirect? – LazyOne Jun 30 '11 at 15:33
jep.. this rewrite only has to work for this specific subdomain.. and no, this is only an example.. I want a rewrite – clarkk Jun 30 '11 at 18:14
As I understand you have resolved it yourself. Good :) – LazyOne Jun 30 '11 at 23:23
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2 Answers

up vote 1 down vote

RewriteRule ^/([^/]+)/([^/]+)/([^/]+) /?v=$1&f=$2&t=$3 [QSA,R,L]

That should do it - you were very close. You are welcome to add your RewriteCond %{HTTP_HOST} one line above it (I have not tested that for you).

Let the Query-String-Append (QSA) flag do the hard work for you :). See the mod_rewrite documentation if you're curious about how that works.

Edit: Just to clarify, the only line you need to accomplish this is the one I have posted, it obviates your second RewriteCond and RewriteRule and collapses it into one statement. You may choose to add a single additional RewriteCond above it to check the value of %{HTTP_HOST}.

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it doesn't work.. api.domain.com/v1/json/account/?id=123 is redirected to /v1/json/account/.. my rewrite looks like this: RewriteCond %{HTTP_HOST} ^(api)\.[^\.]+\.[^\.]+$ [NC] RewriteRule ^/([^/]+)/([^/]+)/([^/]+) /?v=$1&f=$2&t=$3 [QSA,L] – clarkk Jun 30 '11 at 14:58
It definitely works, I tested it before I posted: /v1/json/account becomes /?v=v1&f=json&t=account and /v1/json/account/?id=123 becomes /?v=v1&f=json&t=account&id=123. Two things: 1) you removed the R flag from the rule (make it [QSA,R,L], you need it) and 2) just for testing purposes, remove the RewriteCond to ensure that is not your problem. – loopforever Jun 30 '11 at 15:03
if you use the flag QSA, then the query string will override any of the v, f or t vars (if the query string contains any of them) – clarkk Jun 30 '11 at 15:04
now the rewrite looks like this RewriteRule ^/([^/]+)/([^/]+)/([^/]+) /?v=$1&f=$2&t=$3 [QSA,R,L] but still the same... I'm requsting api.domain.com/v1/json/account/?id=123 – clarkk Jun 30 '11 at 15:06
the rewritecond line is escaped – clarkk Jun 30 '11 at 15:07
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up vote 0 down vote 
RewriteCond %{HTTP_HOST}        ^api\.[^\.]+\.[^\.]+$ [NC]
RewriteCond %{REQUEST_URI}      /([^/]+)/([^/]+)/([^/]+) [NC]
RewriteRule ^(.*)$              /?%{QUERY_STRING}&v=%1&f=%2&t=%3 [L]
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