Metadata API

[vishwasmittal]

Added API to fetch metadata for the media files. Following data can be retrieved from a file:

        Format   string `json:"format"`
	FileType string `json:"file_type"`

	Title       string `json:"title"`
	Album       string `json:"album"`
	Artist      string `json:"artist"`
	AlbumArtist string `json:"album_artist"`
	Composer    string `json:"composer"`
	Genre       string `json:"genre"`
	Year        int    `json:"year"`

	Picture *tag.Picture // `json:"picture"` // Artwork
	Lyrics  string `json:"lyrics"`
	Comment string `json:"comment"

Some of it may be null subject to the data present in the file.

[vishwasmittal]

fixes #26

[csoni111]

I tested the pr, it works fine. Just one small issue that I noticed, it returns the complete cover image data in the JSON response, something like this:

"Picture":{"Ext":"jpg","MIMEType":"image/jpeg","Type":"Cover (front)","Description":"","Data":"/9j/4AAQSkZJRgABAQEASABIAAD/....."}

How to use this image data on the client-side? The purpose behind building this API was to serve chromecast with the URL of the cover image. So it would make sense if we cache this image data in a jpeg file in .fscache directory and return the URL of the file accessible via /cache.

[csoni111]

Please also include the docs for this API in amahi-anywhere-specs

[vishwasmittal]

Yeah, caching the image in .fscache makes sense. Will update the PR.

[cpg]

Can we get the docs for the API at the same time as the code, so we can deploy it?

Thanks