Class: PDFKit::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/pdfkit/middleware.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}, conditions = {}) ⇒ Middleware

Returns a new instance of Middleware.



3
4
5
6
7
8
9
 
# File 'lib/pdfkit/middleware.rb', line 3

def initialize(app, options = {}, conditions = {})
  @app        = app
  @options    = options
  @conditions = conditions
  @render_pdf = false
  @caching    = @conditions.delete(:caching) { false }
end

Instance Method Details

#_call(env) ⇒ Object 



15
16
17
18
19
20
21
22
23
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
 
# File 'lib/pdfkit/middleware.rb', line 15

def _call(env)
  @request    = Rack::Request.new(env)
  @render_pdf = false

  set_request_to_render_as_pdf(env) if render_as_pdf?
  status, headers, response = @app.call(env)

  if rendering_pdf? && headers['Content-Type'] =~ /text\/html|application\/xhtml\+xml/
    body = response.respond_to?(:body) ? response.body : response.join
    body = body.join if body.is_a?(Array)

    root_url = root_url(env)
    protocol = protocol(env)
    options = @options.merge(root_url: root_url, protocol: protocol)

    if headers['PDFKit-javascript-delay']
      options.merge!(javascript_delay: headers.delete('PDFKit-javascript-delay').to_i)
    end

    body = PDFKit.new(body, options).to_pdf
    response = [body]

    if headers['PDFKit-save-pdf']
      File.open(headers['PDFKit-save-pdf'], 'wb') { |file| file.write(body) } rescue nil
      headers.delete('PDFKit-save-pdf')
    end

    unless @caching
      # Do not cache PDFs
      headers.delete('ETag')
      headers.delete('Cache-Control')
    end

    headers['Content-Length'] = (body.respond_to?(:bytesize) ? body.bytesize : body.size).to_s
    headers['Content-Type']   = 'application/pdf'
    headers['Content-Disposition'] = @conditions[:disposition] || 'inline'
  end

  [status, headers, response]
end

#call(env) ⇒ Object 



11
12
13
 
# File 'lib/pdfkit/middleware.rb', line 11

def call(env)
  dup._call(env)
end