[content of content type request header]

Common media formats are as follows ：

text/html ： HTML Format
text/plain ： Plain text format
text/xml ： XML Format
image/gif ：gif Image format
image/jpeg ：jpg Image format
image/png：png Image format

With application The beginning of the media format type ：

application/xhtml+xml ：XHTML Format
application/xml： XML data format
application/atom+xml ：Atom XML Aggregate 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 ： In the default encType,form Form data is encoded as key/value Format send to server （ Default format of data submitted by form ）
multipart/form-data ： When you need to upload files in the form , You need to use this format