mime

name	for
mime	text/plain; charset=utf-8
mime type	text/plain
mime encoding	charset=utf-8

mime	for
application/octet-stream	通用 fallback
application/octet-binary	通用 fallback - 静态
text/plain	文本
application/json	JSON

• Protobuf
  • application/protobuf
  • application/protobuf; proto=org.some.Message
  • application/vnd.google.protobuf
    • used by Prometheus
  • application/x-google-protobuf
    • used by Charles Proxy
    • used by Prometheus
  • application/x-protobuf
    • used by Cloudflare

Content Type

text/html
text/richtext
text/plain
text/css
text/x-script
text/x-component
text/x-java-source
text/x-markdown
application/javascript
application/x-javascript
text/javascript
text/js
image/x-icon
image/vnd.microsoft.icon
application/x-perl
application/x-httpd-cgi
text/xml
application/xml
application/rss+xml
application/vnd.api+json
application/x-protobuf
application/json
multipart/bag
multipart/mixed
application/xhtml+xml
font/ttf
font/otf
font/x-woff
image/svg+xml
application/vnd.ms-fontobject
application/ttf
application/x-ttf
application/otf
application/x-otf
application/truetype
application/opentype
application/x-opentype
application/font-woff
application/eot
application/font
application/font-sfnt
application/wasm
application/javascript-binast
application/manifest+json
application/ld+json
application/graphql+json
application/geo+json

• https://developers.cloudflare.com/speed/optimization/content/brotli/content-compression/

Office

extension	mime
MS Office
.doc	application/msword
.dot	application/msword
-	-
.docx	application/vnd.openxmlformats-officedocument.wordprocessingml.document
.dotx	application/vnd.openxmlformats-officedocument.wordprocessingml.template
.docm	application/vnd.ms-word.document.macroEnabled.12
.dotm	application/vnd.ms-word.template.macroEnabled.12
-
.xls	application/vnd.ms-excel
.xlt	application/vnd.ms-excel
.xla	application/vnd.ms-excel
-
.xlsx	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xltx	application/vnd.openxmlformats-officedocument.spreadsheetml.template
.xlsm	application/vnd.ms-excel.sheet.macroEnabled.12
.xltm	application/vnd.ms-excel.template.macroEnabled.12
.xlam	application/vnd.ms-excel.addin.macroEnabled.12
.xlsb	application/vnd.ms-excel.sheet.binary.macroEnabled.12
-
.ppt	application/vnd.ms-powerpoint
.pot	application/vnd.ms-powerpoint
.pps	application/vnd.ms-powerpoint
.ppa	application/vnd.ms-powerpoint
-
.pptx	application/vnd.openxmlformats-officedocument.presentationml.presentation
.potx	application/vnd.openxmlformats-officedocument.presentationml.template
.ppsx	application/vnd.openxmlformats-officedocument.presentationml.slideshow
.ppam	application/vnd.ms-powerpoint.addin.macroEnabled.12
.pptm	application/vnd.ms-powerpoint.presentation.macroEnabled.12
.potm	application/vnd.ms-powerpoint.template.macroEnabled.12
.ppsm	application/vnd.ms-powerpoint.slideshow.macroEnabled.12
-
.mdb	application/vnd.ms-access

---

• Mismatch between Content-Type and file extension on the web
• Common MIME types
• https://www.freeformatter.com/mime-types-list.html
• https://www.iana.org/assignments/media-types/media-types.xhtml
• https://mimetype.io/all-types/

cfb

• application/x-cfb
  • .doc、.xls、.ppt
  • .ole
  • [MS-CFB]: Compound File Binary File Format
• https://www.loc.gov/preservation/digital/formats/fdd/fdd000380.shtml - cfb
• https://www.loc.gov/preservation/digital/formats/fdd/fdd000510.shtml - .xls
• https://www.loc.gov/preservation/digital/formats/fdd/fdd000511.shtml - .ppt
• https://www.loc.gov/preservation/digital/formats/fdd/fdd000509.shtml - .doc

file-type

• NodeJS filte-type 只能检测到 cfb
  • cfb 为 .doc, .xls, .ppt, .msi 的 supertype
• 通过调用 ffprobe 来获取音频长度 caffco/get-audio-duration

metadata

• probe -> 探测
• audio, video
  • ffprobe
• pdf
  • nodejs
    • cantoo-scribe/pdf-lib
      • npm @cantoo/pdf-lib
      • fork of Hopding/pdf-lib
  • pdfinfo
  • exiftool
• moshen/wasmagic
  • BSD-2, TS
  • WebAssembly compiled version of libmagic

exif

• exif - Exchangeable image file format
• iptc - International Press Telecommunications Council
• xmp - Extensible Metadata Platform
• icc - International Color Consortium
• mpf - Multi-Picture Format
• exiftool
• NodeJS
  • mattiasw/ExifReader
    • npm:exifreader
    • jpeg, tiff, png, heic, avif, webp