75 lines
1.9 KiB
Ruby
75 lines
1.9 KiB
Ruby
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# Prince XML Ruby interface.
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# http://www.princexml.com
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#
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# Library by Subimage Interactive - http://www.subimage.com
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#
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#
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# USAGE
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# -----------------------------------------------------------------------------
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# prince = Prince.new()
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# html_string = render_to_string(:template => 'some_document')
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# send_data(
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# prince.pdf_from_string(html_string),
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# :filename => 'some_document.pdf'
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# :type => 'application/pdf'
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# )
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#
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require 'logger'
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class Prince
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attr_accessor :exe_path, :style_sheets, :log_file, :logger
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# Initialize method
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#
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def initialize()
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# Finds where the application lives, so we can call it.
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@exe_path = `which prince`.chomp
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@style_sheets = ''
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@log_file = "#{RAILS_ROOT}/log/prince.log"
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@logger = RAILS_DEFAULT_LOGGER
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end
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# Sets stylesheets...
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# Can pass in multiple paths for css files.
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#
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def add_style_sheets(*sheets)
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for sheet in sheets do
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@style_sheets << " -s #{sheet} "
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end
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end
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# Returns fully formed executable path with any command line switches
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# we've set based on our variables.
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#
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def exe_path
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# Add any standard cmd line arguments we need to pass
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@exe_path << " --input=html --server --log=#{@log_file} "
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@exe_path << @style_sheets
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return @exe_path
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end
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# Makes a pdf from a passed in string.
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#
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# Returns PDF as a stream, so we can use send_data to shoot
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# it down the pipe using Rails.
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#
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def pdf_from_string(string)
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path = self.exe_path()
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# Don't spew errors to the standard out...and set up to take IO
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# as input and output
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path << ' --silent - -o -'
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# Show the command used...
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logger.info "\n\nPRINCE XML PDF COMMAND"
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logger.info path
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logger.info ''
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# Actually call the prince command, and pass the entire data stream back.
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pdf = IO.popen(path, "w+")
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pdf.puts(string)
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pdf.close_write
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result = pdf.gets(nil)
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pdf.close_read
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return result
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end
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end
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