Escaping ampersand in URL

Question

I am trying to send a GET message that contains strings with ampersands and can t figure how to escape the ampersand in the URL   Example   http   www example com candy name M amp M result   gt  candy name   M   I also tried   http   www example com candy name M  amp M result   gt  candy name   M     I am using URLs manually  so I just need the correct characters   I can t use any libraries  How can it be done

User · Answer

This does not only apply to the ampersand in URLs  but to all reserved characters   Some of which include         amp                         The idea is the same as encoding an  amp in an HTML document  but the context has changed to be within the URI  in addition to being within the HTML document  So  the percent-encoding prevents issues with parsing inside of both contexts   The place where this comes in handy a lot is when you need to put a URL inside of another URL  For example  if you want to post a status on Twitter   http   www twitter com intent tweet status What 27s 20up 2C 20StackOverflow 3F http 3A 2F 2Fwww stackoverflow com    There s lots of reserved characters in my Tweet  namely         so I encoded the whole value of the status URL parameter   This also is helpful when using mailto  links that have a message body or subject  because you need to encode the body and subject parameters to keep line breaks  ampersands  etc  intact      When a character from the reserved set  a  reserved character   has   special meaning  a  reserved purpose   in a certain context  and a URI   scheme says that it is necessary to use that character for some other   purpose  then the character must be percent-encoded  Percent-encoding   a reserved character involves converting the character to its   corresponding byte value in ASCII and then representing that value as   a pair of hexadecimal digits  The digits  preceded by a percent sign         which is used as an escape character  are then used in the URI   in place of the reserved character   For a non-ASCII character  it is   typically converted to its byte sequence in UTF-8  and then each byte   value is represented as above   The reserved character      for   example  if used in the  path  component of a URI  has the special   meaning of being a delimiter between path segments  If  according to a   given URI scheme      needs to be in a path segment  then the three   characters   2F  or   2f  must be used in the segment instead of a raw          http   en wikipedia org wiki Percent-encoding Percent-encoding reserved characters

User · Answer

This may help if someone want it in PHP   variable   candy name M amp M    variable   str replace   amp      26    variable

User · Answer

If you can t use any libraries to encode the value  http   www urlencoder org  or http   www urlencode-urldecode com  or      Just enter your value  M amp M   not the full URL  -

User · Answer

They need to be percent-encoded    gt  encodeURIComponent   amp      26    So in your case  the URL would look like   http   www mysite com candy name M 26M

User · Answer

You can use the   character to  escape  characters that aren t allowed in URLs  See  RFC 1738    A table of ASCII values on http   www asciitable com    You can see  amp  is 26 in hexadecimal - so you need M 26M

User · Answer

Try using http   www example org candy name M 26M     See also this reference and some more information on Wikipedia

User · Answer

You can rather pass your arguments using this encodeURIComponent function so you don t have to worry about passing any special characters   data   param1 getAccNos amp param2   encodeURIComponent  Dolce  amp  Gabbana   OR var someValue    Dolce  amp  Gabbana   data    param1 getAccNos amp param2   encodeURIComponent someValue    https   developer mozilla org en-US docs Web JavaScript Reference Global Objects encodeURIComponent

User · Answer

I would like to add a minor comment on Blender solution   You can do the following   var link    http   example com candy name     encodeURIComponent  M amp M      That outputs   http   example com candy name M 26M   The great thing about this it does not only work for  amp  but for any especial character   For instance   var link    http   example com candy name     encodeURIComponent  M amp M  gt  lt      Outputs    http   example com candy name M 26M 3F 3E 3C

[http] Escaping ampersand in URL

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