http request header request content-type explain .txt

Reference: https: //www.cnblogs.com/Im-Victor/p/9408449.html 

in Http request, we use every day to specify the Content-type request information in different formats, 
there will be available to explain the Content-Type value. 
The MediaType, that is, Internet Media Type, media type; 
also known as MIME type, in Http protocol message header, a Content-Type to indicate specific information requested media type. 
For example: the Type-the Content: text / HTML; charset: UTF-. 8; 
web.header ( 'Content-type', 'text / JSON; charset = UTF-. 8') 

common media format types are as follows: 
1.text / HTML : HTML format 
2.text / plain: plain text 
3.text / xml: XML format 
4.image / gif: gif image formats 
5.image / jpeg: jpg picture format 
6.image / png: png image format 

to begin with application media format type: 
1.application / XHTML + XML: XHTML format 
2.application / xml: XML data format 
3.application / atom + xml: Atom XML format polymerization  
4.application / json: JSON format data
5.application / pdf: pdf format
6.application / msword: Word document format 
7.application / octet-stream: the stream of binary data (such as the common file download) 
8.application / X-WWW-form-urlencoded: 
<form encType = ""> The default encType , form form data is encoded as a key / value format to the server (the default format of the data submission form) 

another common media format is used to upload documents: 
1.multipart / data-form: in the form required when uploading files, you need to use this format