urlencoded Forward slash is breaking URL

Question

About the system  I have URLs of this format in my project -  http   project name browse by exam type tutor search keyword class new search 1 search exam 0 search subject 0   Where keyword class pair means search with  class  keyword   I have a common index php file which executes for every module in the project  There is only a rewrite rule to remove the index php from URL -  RewriteCond  1    index  php resources robots  txt  RewriteCond   REQUEST FILENAME   -f RewriteCond   REQUEST FILENAME   -d RewriteRule        index php  L QSA    I am using urlencode   while preparing the search URL and urldecode   while reading the search URL   Problem  Only the forward slash character is breaking URLs causing 404 page not found error   For example  if I search one two the URL is   http   project name browse by exam type tutor search keyword one 2Ftwo new search 1 search exam 0 search subject 0 page sort    How do I fix this  I need to keep index php hidden in the URL  Otherwise  if that was not needed  there would have been no problem with forward slash and I could have used this URL -  http   project name index php browse by exam type tutor search keyword one  2Ftwo new search 1 search exam 0 search subject 0

User · Answer

Replace  2F with  252F after url encoding  PHP  function custom http build query  query array          return str replace   2F    252F   http build query  query        Handle the request via htaccess   htaccess  RewriteCond   REQUEST URI          252F         NC  RewriteRule    1  3  R 301 L NE    Resources  http   www leakon com archives 865

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Use a different character and replace the slashes server side  e g  Drupal org uses  21  the excalamation mark character    to represent the slash in a url parameter   Both of the links below work   https   api drupal org api drupal includes 21common inc 7  https   api drupal org api drupal includes common inc 7  If you re worried that the character may clash with a character in the parameter then use a combination of characters   So your url would be  http   project name browse by exam type tutor search keyword one - two new search 1 search exam 0 search subject 0  change it out with js and convert it back to a slash server side

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A standard solution for this problem is to allow slashes by making the parameter that may contain slashes the last parameter in the url   For a product code url you would then have     mysite com product details PR12345 22   For a search term you d have  http   project search exam 0 search subject 0 keyword Psychology Management    The keyword here is Psychology Management   It s not a massive amount of work to process the first  named  parameters then concat the remaining ones to be product code or keyword   Some frameworks have this facility built in to their routing definitions   This is not applicable to use case involving two parameters that my contain slashes

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In Apache  AllowEncodedSlashes On would prevent the request from being immediately rejected with a 404   Just another idea on how to fix this

User · Answer

encoded url   str replace   2F        urlencode  url

User · Answer

You can use  2F if using it this way   param1 value1 amp param2 value 2Fvalue  but if you use  param1 value1 param2 value 2Fvalue it will throw an error

User · Answer

I solved this by using 2 custom functions like so   function slash replace  query        return str replace           query      function slash unreplace  query        return str replace           query       So to encode I could call   rawurlencode slash replace  param     and to decode I could call  slash unreplace rawurldecode  param     Cheers

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is simple for me use base64 encode   term   base64 encode  term    url    youurl   term    term   after you decode the term   term   base64 decode    GET    term      this way encode the     and

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I use javascript encodeURI   function for the URL part that has forward slashes that should be seen as characters instead of http address  Eg     api activites     encodeURI   categorie assemblage amp nom Manipulation Finition     see http   www w3schools com tags ref urlencode asp

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On my hosting account this problem was caused by a ModSecurity rule that was set for all accounts automatically  Upon my reporting this problem  their admin quickly removed this rule for my account

User · Answer

Here s my humble opinion       Don t      change settings on the server to make your parameters work correctly  This is a time bomb waiting to happen someday when you change servers    The best way I have found is to just convert the parameter to base 64 encoding  So in my case  I m calling a php service from Angular and passing a parameter that could contain any value   So my typescript code in the client looks like this        private encodeParameter parm string       if   parm           return null            return btoa parm       And to retrieve the parameter in php         item name    request- gt getAttribute  item name         item name   base64 decode  item name

User · Answer

Apache denies all URLs with  2F in the path part  for security reasons  scripts can t normally  ie  without rewriting  tell the difference between  2F and   due to the PATH INFO environment variable being automatically URL-decoded  which is stupid  but a long-standing part of the CGI specification so there s nothing can be done about it    You can turn this feature off using the AllowEncodedSlashes directive  but note that other web servers will still disallow it  with no option to turn that off   and that other characters may also be taboo  eg   5C   and that  00 in particular will always be blocked by both Apache and IIS  So if your application relied on being able to have  2F or other characters in a path part you d be limiting your compatibility deployment options      I am using urlencode   while preparing the search URL   You should use rawurlencode    not urlencode   for escaping path parts  urlencode   is misnamed  it is actually for application x-www-form-urlencoded data such as in the query string or the body of a POST request  and not for other parts of the URL   The difference is that   doesn t mean space in path parts  rawurlencode   will correctly produce  20 instead  which will work both in form-encoded data and other parts of the URL

User · Answer

I had the same problem with slash in url get param  in my case following php code works    value    hello world   value   str replace        amp  47     value   gt   value   urlencode  value    gt     value is now hello 26 2347 3Bworld   I first replace the slash by html entity and then I do the url encoding

[.htaccess] urlencoded Forward slash is breaking URL

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