Class: Rackr::Router::Errors::DevHtml

Inherits:
Object
  • Object
show all
Includes:
HtmlSlice, Action
Defined in:
lib/rackr/router/errors/dev_html.rb

Constant Summary

Constants included from Action

Action::RENDER

Instance Method Summary collapse

Methods included from Action

included

Instance Method Details

#backtrace(env) ⇒ Object 



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# File 'lib/rackr/router/errors/dev_html.rb', line 50

def backtrace(env)
  first, *tail = env['error'].backtrace
  h2 do
    _ 'Traceback '
    span '(innermost first)'
  end

  tag :p, first, class: 'first-p'
  br

  line_number = extract_line_number(first)
  match = first.match(%r{^(/[\w/.-]+)})
  file_path = (match ? match[1] : nil)
  unless file_path.nil?
    lines = []
    File.open(file_path) do |file|
      lines = file.readlines
    end

    lines.map!.with_index do |line, i|
      "#{i + 1}: #{line} \n"
    end

    tag :pre, slice_around_index(lines, line_number).join('').chomp
  end

  tag :p, tail.join("\n")
end

#call(env) ⇒ Object 



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# File 'lib/rackr/router/errors/dev_html.rb', line 12

def call(env)
  html_layout do
    tag :head do
      title 'Application error'
      _ '<style>
            html * { padding:0; margin:0; }
            body * { padding:10px 20px; }
            body * * { padding:0; }
            body { font:small sans-serif; }
            body>div { border-bottom:1px solid #ddd; }
            h1 { font-weight:normal; }
            h2 { margin-bottom:.8em; }
            h2 span { font-size:80%; color:#666; font-weight:normal; }
            #summary { background: #ffc; }
            #summary h2 { font-weight: normal; color: #666; }
            pre {
              background: #f8f8f8;
              padding: 1em;
              margin-bottom: 1em;
            }
      </style>'
    end
    tag :body do
      div id: 'summary' do
        h1 env['error'].class.to_s
        if env['error'].message.size > 1000
          h2 "#{env['error'].message.slice(0, 1000)} ..."
        else
          h2 env['error'].message
        end
      end
      div id: 'backtrace' do
        backtrace(env)
      end
    end
  end
end

#extract_line_number(input) ⇒ Object 



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# File 'lib/rackr/router/errors/dev_html.rb', line 79

def extract_line_number(input)
  if (match = input.match(/:(\d+):in/))
    match[1].to_i
  end
end

#slice_around_index(array, index) ⇒ Object 



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# File 'lib/rackr/router/errors/dev_html.rb', line 85

def slice_around_index(array, index)
  return array if index.nil? || index < 1

  index -= 1
  start_index = [index - 2, 0].max
  end_index = [index + 2, array.size - 1].min

  # Slice the array
  array[start_index..end_index]
end