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3686b77eb6
git-svn-id: http://svn.redmine.org/redmine/trunk@21342 e93f8b46-1217-0410-a6f0-8f06a7374b81
95 lines
3.1 KiB
Ruby
95 lines
3.1 KiB
Ruby
# frozen_string_literal: true
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# Redmine - project management software
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# Copyright (C) 2006-2022 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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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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GS_BIN = (
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Redmine::Configuration['gs_command'] ||
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('gswin64c' if Redmine::Platform.mswin?) ||
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'gs'
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).freeze
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ALLOWED_TYPES = %w(image/bmp image/gif image/jpeg image/png application/pdf)
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# Generates a thumbnail for the source image to target
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def self.generate(source, target, size, is_pdf = false)
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return nil unless convert_available?
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return nil if is_pdf && !gs_available?
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unless File.exist?(target)
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# Make sure we only invoke Imagemagick if the file type is allowed
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mime_type = File.open(source) {|f| Marcel::MimeType.for(f)}
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return nil if !ALLOWED_TYPES.include? mime_type
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return nil if is_pdf && mime_type != "application/pdf"
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directory = File.dirname(target)
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unless File.exist?(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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if is_pdf
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cmd = "#{shell_quote CONVERT_BIN} #{shell_quote "#{source}[0]"} -thumbnail #{shell_quote size_option} #{shell_quote "png:#{target}"}"
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else
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cmd = "#{shell_quote CONVERT_BIN} #{shell_quote source} -auto-orient -thumbnail #{shell_quote size_option} #{shell_quote target}"
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end
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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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begin
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`#{shell_quote CONVERT_BIN} -version`
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@convert_available = $?.success?
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rescue
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@convert_available = false
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end
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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.gs_available?
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return @gs_available if defined?(@gs_available)
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begin
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`#{shell_quote GS_BIN} -version`
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@gs_available = $?.success?
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rescue
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@gs_available = false
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end
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logger.warn("gs binary (#{GS_BIN}) not available") unless @gs_available
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@gs_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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