file_groups

FileGroups

File extensions and media types, grouped by application and type. Useful when you need to process or restrict processing to certain types of files.

Usage

Methods on FileGroups return an object containing a set of media types and file extensions. These are accessible via the .media_types and .extensions methods, which return an Array of Strings. By default only commonly used values are returned. To return all know values pass true to either method, e.g., object.media_types(true)

In some cases additional methods can be called on the object to further restrict the set.

Let's look at some examples.

Images & Video

Retrieve a list of file extensions or media types used by images and video:

require "file_groups"

FileGroups.image.extensions   # ["bmp", "gif", "ico", "jpeg", ... ]
FileGroups.image.media_types  # ["image/bmp", "image/x-ms-bmp", "image/gif", ... ]
FileGroups.video.extensions   # ["asf", "mov", "qt", "movie", ... ]
FileGroups.video.media_types  # ["video/x-ms-asf", "video/quicktime", ... ]

Images can be filtered on by raster, vector, or web:

FileGroups.image.web.extensions     # ["gif", "jpeg", "jpg", "png", "svg", "webp"]
FileGroups.image.raster.extensions  # ["bmp", "gif", "ico", "jpeg", "jpg", "tif", "tiff", "webp"]
FileGroups.image.vector.extensions  # ["svg"]

For a complete list pass in true to any of these methods:

FileGroups.image.web.extensions(true)  # ["bmp", "dib", "gif", "ico", "jfif", "jpe", "jpeg", ... ]

Spreadsheets

Retrieve a list of file extensions or media types used by spreadsheets:

require "file_groups"

FileGroups.spreadsheet.extensions       # ["csv", "xls", "xlsx", "xlt", ... ]
FileGroups.spreadsheet.media_types      # ["text/csv", "application/vnd.ms-excel", ... ]

If you only want values specific to CSVs:

FileGroups.spreadsheet.csv.media_types  # ["text/csv", "text/comma-separated-values" ]

If you only want values specific to Microsoft Excel:

FileGroups.spreadsheet.excel.extensions   # ["xls", "xlsx", "xlt", "xltx", "xlw"]
FileGroups.spreadsheet.excel.media_types  # ["application/vnd.ms-excel", ... ]

Or for OpenOffice Calc:

FileGroups.spreadsheet.calc.extensions  # ["ods", "ots"]

By default these only return common extensions, to return all:

FileGroups.spreadsheet.excel.extensions(true) # ["xls", "xlsx", "xlt", "xltx", ... ]

Everything Else

See the list of categories and tags.

Author

Skye Shaw (skye.shaw -AT- gmail)

License

The gem is available as open source under the terms of the MIT License.