Class: HTML::Proofer

Inherits:
Object
  • Object
show all
Includes:
Yell::Loggable
Defined in:
lib/html/proofer.rb,
lib/html/proofer/checks.rb,
lib/html/proofer/checkable.rb

Defined Under Namespace

Classes: Checkable, Checks

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(src, opts = {}) ⇒ Proofer

Returns a new instance of Proofer.



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# File 'lib/html/proofer.rb', line 27

def initialize(src, opts={})
  @src = src

  @proofer_opts = {
    :ext => ".html",
    :favicon => false,
    :href_swap => [],
    :href_ignore => [],
    :alt_ignore => [],
    :disable_external => false,
    :verbose => false,
    :only_4xx => false,
    :directory_index_file => "index.html"
  }

  @typhoeus_opts = {
    :followlocation => true
  }

  # Typhoeus won't let you pass any non-Typhoeus option
  opts.keys.each do |key|
    unless @typhoeus_opts[key].nil?
      @typhoeus_opts[key] = opts[key]
      @proofer_opts[key] = opts[key]
    end
  end

  @options = @proofer_opts.merge(@typhoeus_opts).merge(opts)

  @failed_tests = []

  Yell.new({ :format => false, :name => "HTML::Proofer", :level => "gte.#{log_level}" }) do |l|
    l.adapter :stdout, level: [:debug, :info, :warn]
    l.adapter :stderr, level: [:error, :fatal]
  end
end

Class Method Details

.create_nokogiri(path) ⇒ Object 



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# File 'lib/html/proofer.rb', line 171

def self.create_nokogiri(path)
  content = File.open(path).read
  Nokogiri::HTML(content)
end

Instance Method Details

#add_failed_tests(filenames, desc, status = nil) ⇒ Object 



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# File 'lib/html/proofer.rb', line 186

def add_failed_tests(filenames, desc, status = nil)
  if filenames.nil?
    @failed_tests << Checks::Issue.new("", desc, status)
  elsif
    filenames.each { |f|
      @failed_tests << Checks::Issue.new(f, desc, status)
    }
  end
end

#external_link_checker(external_urls) ⇒ Object

the hypothesis is that Proofer runs way faster if we pull out all the external URLs and run the checks at the end. Otherwise, we’re halting the consuming process for every file. In addition, sorting the list lets libcurl keep connections to hosts alive. Finally, we’ll make a HEAD request, rather than GETing all the contents



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# File 'lib/html/proofer.rb', line 108

def external_link_checker(external_urls)
  external_urls = Hash[external_urls.sort]

  logger.info HTML::colorize :yellow, "Checking #{external_urls.length} external links..."

  Ethon.logger = logger # log from Typhoeus/Ethon

  external_urls.each_pair do |href, filenames|
    queue_request(:head, href, filenames)
  end
  logger.debug HTML::colorize :yellow, "Running requests for all #{hydra.queued_requests.size} external URLs..."
  hydra.run
end

#failed_tests ⇒ Object 



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# File 'lib/html/proofer.rb', line 196

def failed_tests
  return [] if @failed_tests.empty?
  result = []
  @failed_tests.each { |f| result << f.to_s }
  result
end

#files ⇒ Object 



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# File 'lib/html/proofer.rb', line 161

def files
  if File.directory? @src
    Dir.glob File.join(@src, "**", "*#{@options[:ext]}")
  elsif File.extname(@src) == @options[:ext]
    [@src]
  else
    []
  end
end

#get_checks ⇒ Object 



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# File 'lib/html/proofer.rb', line 176

def get_checks
  checks = HTML::Proofer::Checks::Check.subclasses.map { |c| c.name }
  checks.delete("Favicons") unless @options[:favicon]
  checks
end

#hydra ⇒ Object 



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# File 'lib/html/proofer.rb', line 157

def hydra
  @hydra ||= Typhoeus::Hydra.new
end

#log_level ⇒ Object 



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# File 'lib/html/proofer.rb', line 182

def log_level
  @options[:verbose] ? :debug : :info
end

#queue_request(method, href, filenames) ⇒ Object 



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# File 'lib/html/proofer.rb', line 122

def queue_request(method, href, filenames)
  request = Typhoeus::Request.new(href, @typhoeus_opts.merge({:method => method}))
  request.on_complete { |response| response_handler(response, filenames) }
  hydra.queue request
end

#response_handler(response, filenames) ⇒ Object 



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# File 'lib/html/proofer.rb', line 128

def response_handler(response, filenames)
  href = response.options[:effective_url]
  method = response.request.options[:method]
  response_code = response.code

  debug_msg = "Received a #{response_code} for #{href}"
  debug_msg << " in #{filenames.join(' ')}" unless filenames.nil?
  logger.debug debug_msg

  if response_code.between?(200, 299)
    # continue with no op
  elsif response.timed_out?
    return if @options[:only_4xx]
    add_failed_tests filenames, "External link #{href} failed: got a time out", response_code
  elsif (response_code == 405 || response_code == 420 || response_code == 503) && method == :head
    # 420s usually come from rate limiting; let's ignore the query and try just the path with a GET
    uri = URI(href)
    queue_request(:get, uri.scheme + "://" + uri.host + uri.path, filenames)
  # just be lazy; perform an explicit get request. some servers are apparently not configured to
  # intercept HTTP HEAD
  elsif method == :head
    queue_request(:get, href, filenames)
  else
    return if @options[:only_4xx] && !response_code.between?(400, 499)
    # Received a non-successful http response.
    add_failed_tests filenames, "External link #{href} failed: #{response_code} #{response.return_message}", response_code
  end
end

#run ⇒ Object 



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# File 'lib/html/proofer.rb', line 64

def run
  unless @src.is_a? Array
    total_files = 0
    external_urls = {}

    logger.info HTML::colorize :white, "Running #{get_checks} checks on #{@src} on *#{@options[:ext]}... \n\n"

    files.each do |path|
      total_files += 1
      html = HTML::Proofer.create_nokogiri(path)

      get_checks.each do |klass|
        logger.debug HTML::colorize :blue, "Checking #{klass.to_s.downcase} on #{path} ..."
        check =  Object.const_get(klass).new(@src, path, html, @options)
        check.run
        external_urls.merge!(check.external_urls)
        @failed_tests.concat(check.issues) if check.issues.length > 0
      end
    end

    external_link_checker(external_urls) unless @options[:disable_external]

    logger.info HTML::colorize :green, "Ran on #{total_files} files!\n\n"
  else
    external_urls = Hash[*@src.map{ |s| [s, nil] }.flatten]
    external_link_checker(external_urls) unless @options[:disable_external]
  end

  if @failed_tests.empty?
    logger.info HTML::colorize :green, "HTML-Proofer finished successfully."
  else
    @failed_tests.sort_by(&:path).each do |issue|
      logger.error HTML::colorize :red, issue.to_s
    end

    raise HTML::colorize :red, "HTML-Proofer found #{@failed_tests.length} failures!"
  end
end