Class: WickedPdf

Inherits:
Object
  • Object
show all
Defined in:
lib/wicked_pdf.rb,
lib/wicked_pdf/version.rb,
lib/wicked_pdf/middleware.rb

Defined Under Namespace

Classes: Middleware

Constant Summary collapse

DEFAULT_BINARY_VERSION = 
Gem::Version.new('0.9.9')
EXE_NAME = 
"wkhtmltopdf"
VERSION = 
'0.9.10'
@@config = 
{}

Instance Method Summary collapse

Constructor Details

#initialize(wkhtmltopdf_binary_path = nil) ⇒ WickedPdf

Returns a new instance of WickedPdf.



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# File 'lib/wicked_pdf.rb', line 37

def initialize(wkhtmltopdf_binary_path = nil)
  @exe_path = wkhtmltopdf_binary_path || find_wkhtmltopdf_binary_path
  raise "Location of #{EXE_NAME} unknown" if @exe_path.empty?
  raise "Bad #{EXE_NAME}'s path" unless File.exists?(@exe_path)
  raise "#{EXE_NAME} is not executable" unless File.executable?(@exe_path)

  @binary_version = DEFAULT_BINARY_VERSION
end

Instance Method Details

#pdf_from_string(string, options = {}) ⇒ Object 



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# File 'lib/wicked_pdf.rb', line 54

def pdf_from_string(string, options={})
  if WickedPdf.config[:retreive_version]
    retreive_binary_version
  end

  temp_path = options.delete(:temp_path)
  string_file = WickedPdfTempfile.new("wicked_pdf.html", temp_path)
  string_file.binmode
  string_file.write(string)
  string_file.close
  generated_pdf_file = WickedPdfTempfile.new("wicked_pdf_generated_file.pdf", temp_path)
  command = "\"#{@exe_path}\" #{'-q ' unless on_windows?}#{parse_options(options)} \"file:///#{string_file.path}\" \"#{generated_pdf_file.path}\" " # -q for no errors on stdout
  print_command(command) if in_development_mode?
  err = Open3.popen3(command) do |stdin, stdout, stderr|
    stderr.read
  end
  if return_file = options.delete(:return_file)
    return generated_pdf_file
  end
  generated_pdf_file.rewind
  generated_pdf_file.binmode
  pdf = generated_pdf_file.read
  raise "PDF could not be generated!\n Command Error: #{err}" if pdf and pdf.rstrip.length == 0
  pdf
rescue Exception => e
  raise "Failed to execute:\n#{command}\nError: #{e}"
ensure
  string_file.close! if string_file
  generated_pdf_file.close! if generated_pdf_file && !return_file
end

#retreive_binary_version ⇒ Object 



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# File 'lib/wicked_pdf.rb', line 46

def retreive_binary_version
  begin
    stdin, stdout, stderr = Open3.popen3(@exe_path + ' -V')
    @binary_version = parse_version(stdout.gets(nil))
  rescue StandardError
  end
end