mimetype
A package for detecting MIME types and extensions based on magic numbers
No bindings, thread safe and completely written in go
Install
go get github.com/gabriel-vasile/mimetypeUse
The library exposes three functions you can use in order to detect a file type. See Godoc for full reference.
func Detect(in []byte) (mime, extension string) {...}
func DetectReader(r io.Reader) (mime, extension string, err error) {...}
func DetectFile(file string) (mime, extension string, err error) {...}When detecting from a ReadSeeker interface, such as os.File, make sure
to reset the offset of the reader to the beginning if needed:
_, err = file.Seek(0, io.SeekStart)Supported MIME types
See supported mimes for the list of detected MIME types. If support is needed for a specific file format, please open an issue.
Structure
mimetype uses an hierarchical structure to keep the matching functions. This reduces the number of calls needed for detecting the file type. The reason behind this choice is that there are file formats used as containers for other file formats. For example, Microsoft office files are just zip archives, containing specific metadata files.
Contributing
See CONTRIBUTING.md.