私は、実稼働中の CodeIgniter プロジェクトを新しいサーバーに移行する作業に忙しいです。現在の設定は、ほぼ 1 年間問題なく動作していましたが、新しい LAMP スタックに移行しているときに、index.php を URL に書き戻す際に奇妙な問題が発生しています。
最初は、この質問は SO の方が適していると思いましたが、2 つのインスタンス間でコードはまったく同じであり、両方とも Debian 7.5 と Apache 2.2.22 を実行しているため、私が気付いていないサーバー構成の違いであると思われます。
これはmod_rewriteです。
RewriteEngine On
RewriteBase /bookings/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
前述したように、これは現在の設定では正常に動作していますが、新しいサーバーではベース ページからのリンクは常に同じページに書き換えられます。
両方のサーバーで書き換えログをオンにしましたが、新しいサーバーでは説明できない追加の書き換え手順が実行されています。
現在のサーバー:
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/school -> /var/www/vhosts/domain.tld/html/bookings/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/school/event/1 -> school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'school/event/1'
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-f' => matched
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-d' => matched
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] rewrite 'school/event/1' -> 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add per-dir prefix: index.php/school/event/1 -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] trying to replace prefix /var/www/vhosts/domain.tld/html/bookings/ with /bookings/
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (5) strip matching prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (4) add subst prefix: index.php/school/event/1 -> /bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] internal redirect with /bookings/index.php/school/event/1 [INTERNAL REDIRECT]
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/index.php -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/index.php' pattern='!-f' => not-matched
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/index.php
新しいサーバー:
### First section is identical ###
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/school -> /var/www/vhosts/domain.tld/html/bookings/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/school/event/1 -> school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'school/event/1'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-f' => matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-d' => matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] rewrite 'school/event/1' -> 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add per-dir prefix: index.php/school/event/1 -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] trying to replace prefix /var/www/vhosts/domain.tld/html/bookings/ with /bookings/
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (5) strip matching prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (4) add subst prefix: index.php/school/event/1 -> /bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] internal redirect with /bookings/index.php/school/event/1 [INTERNAL REDIRECT]
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/index.php -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/index.php' pattern='!-f' => not-matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/index.php
### The extra redirect ###
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/ ->
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri ''
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/' pattern='!-f' => matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/' pattern='!-d' => not-matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/index.php -> index.php
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'index.php'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/index.php' pattern='!-f' => not-matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/index.php
上の図からわかるように、新しいサーバーは最初のリダイレクトを正しく実行していますが、その後、常に index.php を返す追加のセクションがあります。何が原因なのか、何か考えはありますか? この問題が mod_rewrite にあるかどうか、100% 確信が持てません。選択肢が尽きており、mod_rewrite についてはあまり知りません。
答え1
何が原因かは分かりませんが、サーバーを再イメージし、サービスを再インストールしたら問題は解消しました。