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^Usingmy app is also a way tosupport me:

This tool detects a file’s MIME type using magic bytes and can retrieve the file extension based on the MIME type.
It can identify the MIME type ofData, based onSwime and ported fromfile-type.

TheExtensions,mimeTypes, andmimeTypesAll data in the dependency package are all generated by scripts based onfile-type.

The function for checking whether the bytes match theMimeType specification is generated from amapping.js mapping file created using data from thefile-type package.
Since the data may not always be accurate, it can be corrected by modifying themapping.js file.

Add CodeMirror to your project using Xcode:

1. In Xcode, go toFile →Add Package Dependencies...
2. Enter the repository URL:https://github.com/jaywcjlove/FileType.git
3. ClickAdd Package

Or add it to yourPackage.swift file:

dependencies:[.package(url:"https://github.com/jaywcjlove/FileType.git", from:"1.0.0")]

Inspect mime type

import FileTypeletpath="/path/to/some-file.jpg"leturl=URL(fileURLWithPath: path, isDirectory:false)letdata=try!Data(contentsOf: url)letmimeType=FileType.mimeType(data: data)mimeType?.type==.jpg // truemimeType! // MimeType(mime: "image/jpeg", ext: "jpg", type: .jpg)

Get the file extension from a MIME type

letavroMimeType=MimeType.mimeTypesAll.first{ $0.mime=="application/avro"}iflet avroMimeType= avroMimeType{    avroMimeType.mime   // "application/avro"    avroMimeType.type   // .avro    avroMimeType.type.rawValue // "avro"}

letmimeTypes=MimeType.mimeTypes.first(where:{ $0.key=="application/mp4"})iflet mimeTypes= mimeTypes{    mimeTypes.compressible    mimeTypes.extensions // ["mp4","mpg4","mp4s","m4p"]}

Thanks to these projects:

• https://github.com/sendyhalim/Swime
• https://github.com/sindresorhus/file-type
• https://github.com/jshttp/mime-db

Licensed under the MIT License.