Class: Rack::XSLView

Inherits:
Object
  • Object
show all
Defined in:
lib/rack-xslview.rb

Defined Under Namespace

Classes: XSLViewError

Instance Method Summary collapse

Constructor Details

#initialize(app, options) ⇒ XSLView

Returns a new instance of XSLView.



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# File 'lib/rack-xslview.rb', line 9

def initialize(app, options)
  @app = app
  @options = {:myxsl => nil}.merge(options)
  if @options[:myxsl].nil?
    require 'rexml/document'
    @xslt = XML::XSLT.new()
    @xslt.xsl = REXML::Document.new '<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/1999/xhtml"><xsl:import href="http://github.com/docunext/1bb02b59/raw/master/standard.html.xsl"/><xsl:output method="xml" encoding="UTF-8" omit-xml-declaration="no" doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN" indent="yes"/></xsl:stylesheet>'
  else
    @xslt = @options[:myxsl]
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack-xslview.rb', line 21

def call(env)

  # No matter what, @app will be called
  status, headers, body = @app.call(env)
  original_response = Array[status, headers, body]
  exluded_status = Array[204, 301, 302, 304]
  return original_response if exluded_status.include?(status) || body.nil?

  return original_response unless headers["Content-Type"].to_s.match(/(ht|x)ml/) 

  # If setup includes paths to exclude from xslt processing, check them
  checknoxsl(env) if @options[:noxsl]

  # Obtain entire request body, ensuring sure it can be processed
  myxml = getResponse(body)
	
  # One more check for an empty respone
  return original_response if myxml.empty?

  # Should XSL file be reloaded?
  if @options[:reload] == true
    @xslt     = XML::XSLT.new()
    @xslt.xsl = REXML::Document.new @options[:xslfile]
  end

  unless @options[:tidy].nil?
    require 'tidy_ffi'
    input_xml = myxml.include?('http://www.w3.org/1999/xhtml') ? 0 : 1
    output = myxml.include?('http://www.w3.org/1999/xhtml') ? 'output_xhtml' : 'output_xml'
    @options[:tidy][:input_xml] = input_xml
    @options[:tidy][output.to_sym] = 1
    nuxml = TidyFFI::Tidy.new(myxml, @options[:tidy]).clean
    nuxml = ''
    if nuxml == ''
       input_xml = myxml.include?('http://www.w3.org/1999/xhtml') ? '' : '-xml'
cmd = %Q~echo | tidy -asxml #{input_xml} -q --doctype "omit" --show-warnings 0 --numeric-entities 1 --drop-proprietary-attributes 1 --preserve-entities 0 --input-encoding "utf8" --char-encoding "utf8" --output-encoding "utf8" --alt-text "" --tidy-mark 0 --logical-emphasis 1 <<THISISITOKOK\n#{myxml}\nTHISISITOKOK }~
        nuxml = `#{cmd}`
        myxml = nuxml unless nuxml == ''
    end
  end
  @xslt.xml = myxml

  # If setup includes env vars to pass through as params, do so
  unless @options[:passenv].nil?
    @myhash = {}
    @options[:passenv].each { |envkey|
      # Does env var exist?
      @myhash[envkey] = "#{env[envkey]}" if env[envkey]
    }
    @xslt.parameters = @myhash unless @myhash.empty?
  end

  # Perform the transformation
  newbody = Array.[](@xslt.serve)

  # If we've made it this far, we can alter the headers
  headers.delete('Content-Length')
  headers['Content-Length'] = newbody[0].length.to_s

  # Content type override?
  unless @options[:content_type].nil?
    headers["Content-Type"] = @options[:content_type]
  end

  [status, headers, newbody]

rescue XSLViewError
  # TODO Log: "Rack XSLView not processed" if env['RACK_ENV'] == 'development'
  original_response
end