j256 / Simplemagic
Licence: isc
Simple file magic number and content-type library which provides mime-type determination from files and byte arrays
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java
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Java Simple Magic
Here's a "magic" number package which allows content-type (mime-type) determination from files and byte arrays. It makes
use of the magic(5) Unix content-type files to implement the same functionality as the Unix file(1) command in Java which
detects the contents of a file. It uses either internal config files or can read /etc/magic
,
/usr/share/file/magic
, or other magic(5) files and determine file content from File
, InputStream
, or
byte[]
.
- For more information, visit the home page.
- The source code be found on the git repository.
- Maven packages are published via
Enjoy, Gray Watson
Getting Started
To get started you use the SimpleMagic package like the following:
// create a magic utility using the internal magic file
ContentInfoUtil util = new ContentInfoUtil();
// if you want to use a different config file(s), you can load them by hand:
// ContentInfoUtil util = new ContentInfoUtil("/etc/magic");
// ...
ContentInfo info = util.findMatch("/tmp/upload.tmp");
// or
ContentInfo info = util.findMatch(inputStream);
// or
ContentInfo info = util.findMatch(contentByteArray);
Once you have the ContentInfo
it provides:
- Enumerated type if the type is common
- Approximate content-name
- Full message produced by the magic file
- Mime-type string if one configured by the config file
- Associated file extensions (if any)
For example:
HTML, mime 'text/html', msg 'HTML document text'
Java, msg 'Java serialization data, version 5'
PDF, mime 'application/pdf', msg 'PDF document, version 1.4'
gzip, mime 'application/x-gzip', msg 'gzip compressed data, was "", from Unix...'
GIF, mime 'image/gif', msg 'GIF image data, version 89a, 16 x 16'
PNG, mime 'image/png', msg 'PNG image, 600 x 371, 8-bit/color RGB, non-interlaced'
ISO, mime 'audio/mp4', msg 'ISO Media, MPEG v4 system, iTunes AAC-LC'
Microsoft, mime 'application/msword', msg 'Microsoft Word Document'
RIFF, mime 'audio/x-wav', msg 'RIFF (little-endian) data, WAVE audio, Microsoft...'
JPEG, mime 'image/jpeg', msg 'JPEG image data, JFIF standard 1.01'
ChangeLog Release Notes
See the ChangeLog.txt file.
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