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@@ -4,6 +4,10 @@ $:.unshift File.dirname(__FILE__) # For use/testing when no gem is installed
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 # stdlib
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+# third party
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+require 'rubygems'
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+require 'mime/types'
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+
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 # internal requires
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 require 'grit/lazy'
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 require 'grit/errors'

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@@ -1,6 +1,8 @@
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 module Grit
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   class Blob
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+    DEFAULT_MIME_TYPE = "text/plain"
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+    
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     attr_reader :id
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     attr_reader :mode
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     attr_reader :name
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@@ -41,6 +43,14 @@ module Grit
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       @data ||= @repo.git.cat_file({:p => true}, id)
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     end
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+    # The mime type of this file (based on the filename)
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+    #
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+    # Returns String
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+    def mime_type
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+      guesses = MIME::Types.type_for(self.name) rescue []
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+      guesses.first ? guesses.first.simplified : DEFAULT_MIME_TYPE
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+    end
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+    
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     # The blame information for the given file at the given commit
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     #
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     # Returns Array: [Grit::Commit, Array: [<line>]]

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@@ -29,6 +29,20 @@ class TestBlob < Test::Unit::TestCase
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     assert_equal 11, blob.size
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   end
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+  # data
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+  
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+  # mime_type
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+  
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+  def test_mime_type_should_return_mime_type_for_known_types
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+    blob = Blob.create(@r, :id => 'abc', :name => 'foo.png')
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+    assert_equal "image/png", blob.mime_type
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+  end
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+  
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+  def test_mime_type_should_return_text_plain_for_unknown_types
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+    blob = Blob.create(@r, :id => 'abc')
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+    assert_equal "text/plain", blob.mime_type
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+  end
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+  
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   # blame
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   def test_blame