Class: Rack::XSL

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

Defined Under Namespace

Classes: RackXSLError

Instance Method Summary collapse

Constructor Details

#initialize(app, options) ⇒ XSL

Returns a new instance of XSL.



10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/rack/xsl.rb', line 10

def initialize(app, options)
  @app = app
  @options = {:myxsl => nil}.merge(options)
  if @options[:myxsl].nil?
    require 'rexml/document'
    @xslt = XML::XSLT.new()
    myfile = File.new('./lib/rack/output.xhtml10.xsl')
    @xslt.xsl = REXML::Document.new myfile
  else
    @xslt = @options[:myxsl]
    @xslt.xsl = REXML::Document.new @options[:xslfile]
  end
end

Instance Method Details

#call(env) ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
 
# File 'lib/rack/xsl.rb', line 24

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)
  body.close if body.respond_to?(:close)
	
  # 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?
    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 = ''
    nuxml = TidyFFI::Tidy.new(myxml, @options[:tidy]).clean
    myxml = nuxml
  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

  # Cache control override?
  headers["Cache-Control"] = @options[:cache_control] if @options.has_key?(:cache_control)

  [status, headers, newbody]

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