Console output "Media type Error Exception" When sending an HTTP request

Type format:

type/subtype (;p arameter)?  type  1 

Subtype subtype, arbitrary string, such as HTML, if the * number represents all;  
parameter optional, some parameters, such as the Q parameter of the Accept request header, Content-type the charset parameter.

example:

content-type: text/html;charset:utf-8;1 

    text/html : html format     text/plain : Plain text Format            text/xml :  xml format     text/ X-markdown:markdown format     image/gif :gif image format          image/jpeg :jpg picture format      image/png:png picture format 1234567

 application/xhtml+xml :xhtml format    application/xml     :  xml data Format    application/atom+xml  :atom xml aggregation format         application/json    : json Data Format    application/pdf        :pdf format      application/msword  :  word Document Format    application/octet-stream :  binary stream data (such as common file downloads)     Application/x-www-form-urlencoded : <form enctype= "" > The default enctype,form form data is encoded in 12345678

    multipart/form-data : 

When you need to upload a file in a form, you need to use that format. These are some of the content-type content formats that we often use in our daily development.

Console output "Media type Error Exception" When sending an HTTP request