Problem with RewriteRule when url contains percent character

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  • Jon Maz
    #1

    Problem with RewriteRule when url contains percent character

    Hi,

    I'm having problems with a RewriteRule that's applied to url's with the %
    character in them, hope someone can help. The % character is a result of
    url-encoding non-ASCII words, as in the example below:

    1. the word "sécurité" comes out of my db

    2. I construct the following link, using the php urlencode function:
    <a href="/search/s%C3%A9curit%C3 %A9">sécurité</a>

    3. the url created should be interpreted by a RewriteRule:
    RewriteRule ^search/([a-zA-Z0-9-+%]+)$ /pages/search.php?word =$1 [QSA,L]

    However the RewriteRule doesn't match on my url, and I see this in the
    RewriteLog:

    init rewrite engine with requested uri /search/sécurité

    So it seems like some kind of decoding is going on so that the RewriteRule
    never even sees the % character. I have set everything I can think of
    (MySql SET NAMES, Apache AddDefaultChars et) to utf-8.

    Any ideas?

    TIA,

    JON


    Tags: None
    • HansH
      #2
      Re: Problem with RewriteRule when url contains percent character

      "Jon Maz" <pparker.remove this@gmx.remove thistoo.netschr eef in bericht
      news:eq5kcj$9q9 $1@aioe.org...
      I'm having problems with a RewriteRule that's applied to url's with the %
      character in them, hope someone can help. The % character is a result of
      url-encoding non-ASCII words, as in the example below:
      >
      1. the word "sécurité" comes out of my db
      >
      2. I construct the following link, using the php urlencode function:
      <a href="/search/s%C3%A9curit%C3 %A9">sécurité</a>
      >
      3. the url created should be interpreted by a RewriteRule:
      RewriteRule ^search/([a-zA-Z0-9-+%]+)$ /pages/search.php?word =$1
      [QSA,L]
      >
      However the RewriteRule doesn't match on my url, and I see this in the
      RewriteLog:
      >
      init rewrite engine with requested uri /search/sécurité
      >
      So it seems like some kind of decoding is going on so that the RewriteRule
      never even sees the % character. I have set everything I can think of
      (MySql SET NAMES, Apache AddDefaultChars et) to utf-8.
      >
      So php has encoded the url to some ISO8859 variant and apache is decoding
      those to some utf ... next to wonder is the charset used by your OS to
      store the file name ...

      In general, just forget diacritial, language specific, fancy characters and
      just use 'securite' for filename.
      It keeps you from dozens of cross-platform and cross-language traps, easing
      migration of a website ten fold.

      http://czyborra.com/charsets/iso8859.html 'The ISO 8859 Alphabet Soup'

      HansH



        Comment

        • Jon Maz
          #3
          Re: Problem with RewriteRule when url contains percent character

          Hi Hans,

          Thanks for your answer. I guess I'm best off just avoiding the whole thing.

          What got me wondering was the fact that my php application can cope fine
          when this encoded word is passed in the query string:

          /pages/search.php?word =s%C3%A9curit%C 3%A9

          But perhaps it's simply that different rules apply to a url and a query
          string parameter?

          Thanks,

          JON


            Comment

            • rh
              #4
              Re: Problem with RewriteRule when url contains percent character


              "Jon Maz" <pparker.remove this@gmx.remove thistoo.netwrot e in message
              news:eq5kcj$9q9 $1@aioe.org...
              Hi,
              >
              I'm having problems with a RewriteRule that's applied to url's with the %
              character in them, hope someone can help. The % character is a result of
              url-encoding non-ASCII words, as in the example below:
              >
              1. the word "sécurité" comes out of my db
              >
              2. I construct the following link, using the php urlencode function:
              <a href="/search/s%C3%A9curit%C3 %A9">sécurité</a>
              How do you get s%C3%A9curit%C3 %A9 from sécurité

              sécurité, url encoded, is s%E9curit%E9

              s%C3%A9curit%C3 %A9 decoded is sécurité as is correctly reported in your rewrite log.
              >
              3. the url created should be interpreted by a RewriteRule:
              RewriteRule ^search/([a-zA-Z0-9-+%]+)$ /pages/search.php?word =$1 [QSA,L]
              a hyphen in a character class specifies a range unless it's the first or last character in
              the class

              what range are you looking for with 9-+
              >
              However the RewriteRule doesn't match on my url, and I see this in the
              RewriteLog:
              >
              init rewrite engine with requested uri /search/sécurité
              The rewrite rule works correctly, the uri contains à and ©. The regex doesn't allow for
              these.
              >
              So it seems like some kind of decoding is going on so that the RewriteRule
              never even sees the % character. I have set everything I can think of
              (MySql SET NAMES, Apache AddDefaultChars et) to utf-8.
              >
              The uri is decoded before the server tries to resolve it, why would it not?

              Why are you trying to do the heavy lifting with mod rewrite? just pass the search term to
              the script and validate it there, you should validate all user input in your scripts.

              RewriteRule ^search/(.+)$ /pages/search.php?word =$1 [QSA,L]


              Rich


                Comment

                • Nick Kew
                  #5
                  Re: Problem with RewriteRule when url contains percent character

                  On Sun, 4 Feb 2007 21:49:08 -0000
                  "Jon Maz" <pparker.remove this@gmx.remove thistoo.netwrot e:
                  So it seems like some kind of decoding is going on so that the
                  RewriteRule never even sees the % character. I have set everything I
                  can think of (MySql SET NAMES, Apache AddDefaultChars et) to utf-8.
                  No you haven't. The expression in your RewriteRule is firmly in
                  ASCII, so it fails to match the non-ASCII characters in the URL.
                  Any ideas?
                  Don't faff about with mod_rewrite like that. Or if you
                  really must, fix your regexp. Or as someone else said,
                  stick to ASCII.

                  --
                  Nick Kew

                  Application Development with Apache - the Apache Modules Book
                  Apache Tutor
                  http://www.apachetutor.org/

                    Comment

                    • Jon Maz
                      #6
                      Re: Problem with RewriteRule when url contains percent character

                      Thanks to everybody for their help on this one!


                        Comment

                        • Jon Maz
                          #7
                          Re: Problem with RewriteRule when url contains percent character

                          Thanks to everybody for their help on this one!



                            Comment

                            • Tim Roberts
                              #8
                              Re: Problem with RewriteRule when url contains percent character

                              "rh" <disposable1234 5@cableone.netw rote:
                              >
                              >"Jon Maz" <pparker.remove this@gmx.remove thistoo.netwrot e:
                              >>
                              >I'm having problems with a RewriteRule that's applied to url's with the %
                              >character in them, hope someone can help. The % character is a result of
                              >url-encoding non-ASCII words, as in the example below:
                              >>
                              >1. the word "sécurité" comes out of my db
                              >>
                              >2. I construct the following link, using the php urlencode function:
                              ><a href="/search/s%C3%A9curit%C3 %A9">sécurité</a>
                              >
                              >How do you get s%C3%A9curit%C3 %A9 from sécurité
                              >
                              >sécurité, url encoded, is s%E9curit%E9
                              Only in iso-8859-1. In UTF-8, the OP's encoding is correct.
                              --
                              Tim Roberts, timr@probo.com
                              Providenza & Boekelheide, Inc.

                                Comment

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