http Content type

Content-Type（内容类型），一般是指网页中存在的 Content-Type，用于定义网络文件的类型和网页的编码，决定浏览器将以什么形式、什么编码读取这个文件，这就是经常看到一些 PHP 网页点击的结果却是下载一个文件或一张图片的原因。

Content-Type 标头告诉客户端实际返回的内容的内容类型

Application

• application/EDI-X12
• application/EDIFACT
• application/javascript
• application/octet-stream
• application/ogg
• application/pdf
• application/xhtml+xml
• application/x-shockwave-flash
• application/json
• application/ld+json
• application/xml
• application/zip
• application/x-www-form-urlencoded

Audio

• audio/mpeg
• audio/x-ms-wma
• audio/vnd.rn-realaudio
• audio/x-wav

Image

• image/gif
• image/jpeg
• image/png
• image/tiff
• image/vnd.microsoft.icon
• image/x-icon
• image/vnd.djvu
• image/svg+xml

Multipart

• multipart/mixed
• multipart/alternative
• multipart/related (using by MHTML (HTML mail).)
• multipart/form-data

Text

• text/css
• text/csv
• text/html
• text/javascript (obsolete)
• text/plain
• text/xml
• Video
• video/mpeg
• video/mp4
• video/quicktime
• video/x-ms-wmv
• video/x-msvideo
• video/x-flv
• video/webm

VND

• application/vnd.oasis.opendocument.text
• application/vnd.oasis.opendocument.spreadsheet
• application/vnd.oasis.opendocument.presentation
• application/vnd.oasis.opendocument.graphics
• application/vnd.ms-excel
• application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
• application/vnd.ms-powerpoint
• application/vnd.openxmlformats-officedocument.presentationml.presentation
• application/msword
• application/vnd.openxmlformats-officedocument.wordprocessingml.document
• application/vnd.mozilla.xul+xml