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7fd04e1f8d
git-svn-id: http://svn.redmine.org/redmine/trunk@16685 e93f8b46-1217-0410-a6f0-8f06a7374b81
62 lines
2.2 KiB
Ruby
62 lines
2.2 KiB
Ruby
# Redmine - project management software
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# Copyright (C) 2006-2017 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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require 'fileutils'
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require 'mimemagic'
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module Redmine
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module Thumbnail
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extend Redmine::Utils::Shell
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CONVERT_BIN = (Redmine::Configuration['imagemagick_convert_command'] || 'convert').freeze
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ALLOWED_TYPES = %w(image/bmp image/gif image/jpeg image/png)
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# Generates a thumbnail for the source image to target
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def self.generate(source, target, size)
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return nil unless convert_available?
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unless File.exists?(target)
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# Make sure we only invoke Imagemagick if the file type is allowed
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unless File.open(source) {|f| ALLOWED_TYPES.include? MimeMagic.by_magic(f).try(:type) }
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return nil
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end
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directory = File.dirname(target)
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unless File.exists?(directory)
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FileUtils.mkdir_p directory
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end
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size_option = "#{size}x#{size}>"
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cmd = "#{shell_quote CONVERT_BIN} #{shell_quote source} -thumbnail #{shell_quote size_option} #{shell_quote target}"
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unless system(cmd)
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logger.error("Creating thumbnail failed (#{$?}):\nCommand: #{cmd}")
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return nil
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end
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end
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target
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end
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def self.convert_available?
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return @convert_available if defined?(@convert_available)
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@convert_available = system("#{shell_quote CONVERT_BIN} -version") rescue false
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logger.warn("Imagemagick's convert binary (#{CONVERT_BIN}) not available") unless @convert_available
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@convert_available
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end
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def self.logger
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Rails.logger
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end
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end
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end
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