application/x-www-form-urlencoded

This is the default content type. Forms submitted with this content type must be encoded as follows:

  1. Control names and values are escaped. Space characters are replaced by +', and then reserved characters are escaped as described in [[RFC1738]](https://www.w3.org/TR/html4/references.html#ref-RFC1738), section 2.2: Non-alphanumeric characters are replaced by%HH’, a percent sign and two hexadecimal digits representing the ASCII code of the character. Line breaks are represented as “CR LF” pairs (i.e., `%0D%0A’).
  2. The control names/values are listed in the order they appear in the document. The name is separated from the value by =' and name/value pairs are separated from each other by&’.