Hi,I am having trouble with how mod_rewrite handles environment variables that are set with the [E=VAR:VAL] flag for RewriteRule. I am setting an environment variable to prevent a loop. The logs show it is set, and then matched, but then on the subsequent iteration of the rules it is no longer set (so the loop occurs that it is supposed to prevent).
The directives I am testing with are:
RewriteRule ^((?!pages/).*)$ pages/$1 [env=rewritten:1]
RewriteCond %{ENV:rewritten} !=1
RewriteRule ^pages(/.*)$ $1 [R=301,L]
One cycle of the log output is below. Line 8 clearly shows the
environment variable is there and prevents the second rule running. But
then on line 15, on the next iteration, it has disappeared again and
returns nothing. What is going on? Am I missing something? Surely an
environment variable should not disappear again on the next iteration.
1 strip per-dir prefix: /eg/trent -> trent 2 applying pattern '^((?!pages/).*)$' to uri 'trent' 3 rewrite 'trent' -> 'pages/trent' 4 setting env variable 'rewritten' to '1' 5 add per-dir prefix: pages/trent -> /eg/pages/trent 6 strip per-dir prefix: /eg/pages/trent -> pages/trent 7 applying pattern '^pages(/.*)$' to uri 'pages/trent' 8 RewriteCond: input='1' pattern='!=1' => not-matched 9 strip document_root prefix: /eg/pages/trent -> /pages/trent 10 internal redirect with /pages/trent [INTERNAL REDIRECT] 11 strip per-dir prefix: /eg/pages/trent -> pages/trent 12 applying pattern '^((?!pages/).*)$' to uri 'pages/trent' 13 strip per-dir prefix: /eg/pages/trent -> pages/trent 14 applying pattern '^pages(/.*)$' to uri 'pages/trent' 15 RewriteCond: input='' pattern='!=1' => matched 16 rewrite 'pages/trent' -> '/trent' 17 explicitly forcing redirect with http://example.com/trent 18 escaping http://example.com/trent for redirect 19 redirect to http://example.com/trent [REDIRECT/301]If anyone could shed some light on this it would be much appreciated. I know I could achieve my objective in other ways. I'm not looking for help with that. I'm looking to understand how environment variables work with mod_rewrite and why the above is happening.
This is with Apache 2.4.6. Thanks Nigel --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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