danopia (owner)

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gist: 161524 Download_button fork
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require 'digest/md5'
 
class FileNotFoundController < ApplicationController
	def index
		@path = params[:path].join('/')
 
		# Nail and serve images on request if they aren't nailed yet
		if @path =~ /^(.*)\/.nails\/([a-z]+)\/(.+)$/
 
			@folder = $1
			@size = $2
			@name = $3
			@path = @folder + @name
 
			fs_folder = RAILS_ROOT + "/public/#{@folder}"
			fs_path = fs_folder + "/#{@name}"
 
			@sizes ||= ['thumb', 'small', 'medium', 'large']
			if @sizes.include? @size
				@size_sym = @size.to_sym
			else
				render :action => 'filenotfound', :status => 404
				return
			end
 
			fs_target = _resize_image fs_path, @size_sym
			send_file(fs_target, :type => 'image/' + File.extname(@name).delete('.').downcase, :disposition => 'inline')
			return
		end
 
		@fs_path = RAILS_ROOT + '/public/' + @path
		if File.exists?(@fs_path) && !(params[:path].include?('.nail'))
			files = Dir.entries(@fs_path).sort!
			@dirs = []
			@imgs = []
			@files = []
			@sizes = []
			@img_exts = ['.gif', '.jpg', '.jpeg', '.png', '.svg', '.bmp'] #    ', '.      , '.'
 
			@fs_nail = @fs_path + '/.nail/'
 
			files.each do |file|
				next if file[0,1] == '.' && file != '..'
				file_path = @fs_path + '/' + file
				ftype = File.ftype(file_path)
				if ftype == 'file'
					file_ext = File.extname(file).downcase
					file_array = {:name => file, :size => File.size(file_path)}
					if @img_exts.include? file_ext
						_resize_image file_path, :thumb
						@imgs << file_array
					else
						@files << file_array
					end
				elsif ftype == 'directory'
					@dirs << file
				end
			end
 
			@thumbnail = @imgs.size > @files.size
			unless @thumbnail
				@files += @imgs
				@files.sort! { |a,b| a[:name] <=> b[:name] }
			end
 
			render :action => 'dirlist'
 
		else
			render :action => 'filenotfound', :status => 404
		end
	end
 
	def _resize_image(fs_image, type)
		fs_target = File.dirname(fs_image) + "/.nails/#{type}/"
		FileUtils.mkdir_p fs_target
		fs_target += File.basename(fs_image)
 
		@nail_types ||= {
			:thumb => '150x113',
			:small => '320x240',
			:medium => '640x480',
			:large => '1280x960'
		}
 
		unless File.exists?(fs_target) && (File.stat(fs_target).mtime.to_i > File.stat(fs_image).mtime.to_i)
			system("convert -resize #{@nail_types[type] || type} '#{fs_image}' '#{fs_target}'")
		end
		fs_target
	end
end