List of HTTP header fields

https://en.wikipedia.org/wiki/List_of_HTTP_header_fields

Content-Type

The MIME type of the body of the request (used with POST and PUT requests)

Content-Type: application/x-www-form-urlencoded

常见 MIME type

Type

application

application/json

: JavaScript Object Notation JSON;

application/pdf

: Portable Document Format, PDF has been in use for document exchange on the Internet since 1993;

application/xml

: XML files;

Type

text

text/css

: Cascading Style Sheets;

text/csv

: Comma-separated values;

text/html

: HTML;

text/javascript

(Obsolete): JavaScript;

text/xml

: Extensible Markup Language;

List of common media subtype prefixes

application/vnd.ms-excel

: Microsoft Excel files