Class: Shrimp::Phantom

Inherits:
Object
  • Object
show all
Defined in:
lib/shrimp/phantom.rb

Constant Summary collapse

SCRIPT_FILE = 
File.expand_path('../rasterize.js', __FILE__)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url_or_file, options = { }, cookies = { }, outfile = nil) ⇒ Phantom

Public: initializes a new Phantom Object

url_or_file - The url of the html document to render options - a hash with options for rendering

* format              - the paper format for the output eg: "5in*7.5in", "10cm*20cm", "A4", "Letter"
* zoom                - the viewport zoom factor
* margin              - the margins for the pdf
* command_config_file - the path to a json configuration file for command-line options

cookies - hash with cookies to use for rendering outfile - optional path for the output file a Tempfile will be created if not given

Returns self

Raises:



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# File 'lib/shrimp/phantom.rb', line 95

def initialize(url_or_file, options = { }, cookies={ }, outfile = nil)
  @source  = Source.new(url_or_file)
  @options = Shrimp.configuration.default_options.merge(options)
  @cookies = cookies
  @outfile = File.expand_path(outfile) if outfile
  raise NoExecutableError.new unless File.exists?(Shrimp.configuration.phantomjs)
end

Instance Attribute Details

#configuration ⇒ Object

Returns the value of attribute configuration.



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# File 'lib/shrimp/phantom.rb', line 27

def configuration
  @configuration
end

#cookies ⇒ Object (readonly)

Returns the value of attribute cookies.



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# File 'lib/shrimp/phantom.rb', line 28

def cookies
  @cookies
end

#error ⇒ Object (readonly)

Returns the value of attribute error.



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# File 'lib/shrimp/phantom.rb', line 28

def error
  @error
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/shrimp/phantom.rb', line 28

def options
  @options
end

#outfile ⇒ Object

Returns the value of attribute outfile.



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# File 'lib/shrimp/phantom.rb', line 27

def outfile
  @outfile
end

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/shrimp/phantom.rb', line 28

def result
  @result
end

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/shrimp/phantom.rb', line 27

def source
  @source
end

Instance Method Details

#cmd ⇒ Object

Public: Returns the phantom rasterize command



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# File 'lib/shrimp/phantom.rb', line 56

def cmd
  cookie_file                       = dump_cookies
  format, zoom, margin, orientation = options[:format], options[:zoom], options[:margin], options[:orientation]
  rendering_time, timeout           = options[:rendering_time], options[:rendering_timeout]
  viewport_width, viewport_height   = options[:viewport_width], options[:viewport_height]
  max_redirect_count                = options[:max_redirect_count]
  @outfile                          ||= "#{options[:tmpdir]}/#{Digest::MD5.hexdigest((Time.now.to_i + rand(9001)).to_s)}.pdf"
  command_config_file               = "--config=#{options[:command_config_file]}"
  [
    Shrimp.configuration.phantomjs,
    command_config_file,
    SCRIPT_FILE,
    @source.to_s.shellescape,
    @outfile,
    format,
    zoom,
    margin,
    orientation,
    cookie_file,
    rendering_time,
    timeout,
    viewport_width,
    viewport_height,
    max_redirect_count
  ].join(" ")
end

#run ⇒ Object

Public: Runs the phantomjs binary

Returns the stdout output of phantomjs



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# File 'lib/shrimp/phantom.rb', line 34

def run
  @error  = nil
  @result = `#{cmd}`
  unless $?.exitstatus == 0
    @error  = @result
    @result = nil
  end
  @result
end

#run! ⇒ Object 



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# File 'lib/shrimp/phantom.rb', line 44

def run!
  @error  = nil
  @result = `#{cmd}`
  unless $?.exitstatus == 0
    @error  = @result
    @result = nil
    raise RenderingError.new(@error)
  end
  @result
end

#to_file(path = nil) ⇒ Object

Public: renders to pdf path - the destination path defaults to outfile

Returns a File Handle of the Resulting pdf



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# File 'lib/shrimp/phantom.rb', line 117

def to_file(path=nil)
  self.to_pdf(path)
  File.new(@outfile)
end

#to_file!(path = nil) ⇒ Object 



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# File 'lib/shrimp/phantom.rb', line 136

def to_file!(path=nil)
  self.to_pdf!(path)
  File.new(@outfile)
end

#to_pdf(path = nil) ⇒ Object

Public: renders to pdf path - the destination path defaults to outfile

Returns the path to the pdf file



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# File 'lib/shrimp/phantom.rb', line 107

def to_pdf(path=nil)
  @outfile = File.expand_path(path) if path
  self.run
  @outfile
end

#to_pdf!(path = nil) ⇒ Object 



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# File 'lib/shrimp/phantom.rb', line 130

def to_pdf!(path=nil)
  @outfile = File.expand_path(path) if path
  self.run!
  @outfile
end

#to_string(path = nil) ⇒ Object

Public: renders to pdf path - the destination path defaults to outfile

Returns the binary string of the pdf



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# File 'lib/shrimp/phantom.rb', line 126

def to_string(path=nil)
  File.open(self.to_pdf(path)).read
end

#to_string!(path = nil) ⇒ Object 



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# File 'lib/shrimp/phantom.rb', line 141

def to_string!(path=nil)
  File.open(self.to_pdf!(path)).read
end