Media Formatters

Media Type = MIME Type

指明了entity body中的格式

• text/html
• image/png
• application/json

//response
HTTP/1.1 200 OK
Content-Length: 95267
Content-Type: image/png

//request
Accept: text/html,application/xhtml+xml,application/xml

Media Type 告诉 WebAPI 如何序列化和反序列化message body(支持格式：ML, JSON, BSON, and form-urlencoded data)

可以自定义Formatter

url:http://www.asp.net/web-api/overview/formats-and-model-binding/media-formatters