class Gem::Server

Gem::Server and allows users to serve gems for consumption by ‘gem –remote-install`.

gem_server starts an HTTP server on the given port and serves the following:

  • “/” - Browsing of gem spec files for installed gems

  • “/specs.#{Gem.marshal_version}.gz” - specs name/version/platform index

  • “/latest_specs.#{Gem.marshal_version}.gz” - latest specs name/version/platform index

  • “/quick/” - Individual gemspecs

  • “/gems” - Direct access to download the installable gems

  • “/rdoc?q=” - Search for installed rdoc documentation

Usage

gem_server = Gem::Server.new Gem.dir, 8089, false
gem_server.run

Constants

DOC_TEMPLATE
RDOC_CSS

CSS is copy & paste from rdoc-style.css, RDoc V1.0.1 - 20041108

RDOC_NO_DOCUMENTATION
RDOC_SEARCH_TEMPLATE

Attributes

spec_dirs[R]

Public Class Methods

new(gem_dirs, port, daemon, launch = nil, addresses = nil) click to toggle source
# File rubygems/server.rb, line 430
def initialize(gem_dirs, port, daemon, launch = nil, addresses = nil)
  begin
    require 'webrick'
  rescue LoadError
    abort "webrick is not found. You may need to `gem install webrick` to install webrick."
  end

  Gem::RDoc.load_rdoc
  Socket.do_not_reverse_lookup = true

  @gem_dirs  = Array gem_dirs
  @port      = port
  @daemon    = daemon
  @launch    = launch
  @addresses = addresses

  logger  = WEBrick::Log.new nil, WEBrick::BasicLog::FATAL
  @server = WEBrick::HTTPServer.new :DoNotListen => true, :Logger => logger

  @spec_dirs = @gem_dirs.map {|gem_dir| File.join gem_dir, 'specifications' }
  @spec_dirs.reject! {|spec_dir| !File.directory? spec_dir }

  reset_gems

  @have_rdoc_4_plus = nil
end
run(options) click to toggle source
# File rubygems/server.rb, line 425
def self.run(options)
  new(options[:gemdir], options[:port], options[:daemon],
      options[:launch], options[:addresses]).run
end

Public Instance Methods

add_date(res) click to toggle source
# File rubygems/server.rb, line 457
def add_date(res)
  res['date'] = @spec_dirs.map do |spec_dir|
    File.stat(spec_dir).mtime
  end.max
end
doc_root(gem_name) click to toggle source
# File rubygems/server.rb, line 469
def doc_root(gem_name)
  if have_rdoc_4_plus?
    "/doc_root/#{u gem_name}/"
  else
    "/doc_root/#{u gem_name}/rdoc/index.html"
  end
end
have_rdoc_4_plus?() click to toggle source
# File rubygems/server.rb, line 477
def have_rdoc_4_plus?
  @have_rdoc_4_plus ||=
    Gem::Requirement.new('>= 4.0.0.preview2').satisfied_by? Gem::RDoc.rdoc_version
end
latest_specs(req, res) click to toggle source
# File rubygems/server.rb, line 482
def latest_specs(req, res)
  reset_gems

  res['content-type'] = 'application/x-gzip'

  add_date res

  latest_specs = Gem::Specification.latest_specs

  specs = latest_specs.sort.map do |spec|
    platform = spec.original_platform || Gem::Platform::RUBY
    [spec.name, spec.version, platform]
  end

  specs = Marshal.dump specs

  if req.path =~ /\.gz$/
    specs = Gem::Util.gzip specs
    res['content-type'] = 'application/x-gzip'
  else
    res['content-type'] = 'application/octet-stream'
  end

  if req.request_method == 'HEAD'
    res['content-length'] = specs.length
  else
    res.body << specs
  end
end
launch() click to toggle source
# File rubygems/server.rb, line 872
def launch
  listeners = @server.listeners.map{|l| l.addr[2] }

  # TODO: 0.0.0.0 == any, not localhost.
  host = listeners.any?{|l| l == '0.0.0.0' } ? 'localhost' : listeners.first

  say "Launching browser to http://#{host}:#{@port}"

  system("#{@launch} http://#{host}:#{@port}")
end
listen(addresses = @addresses) click to toggle source

Creates server sockets based on the addresses option. If no addresses were given a server socket for all interfaces is created.

# File rubygems/server.rb, line 516
def listen(addresses = @addresses)
  addresses = [nil] unless addresses

  listeners = 0

  addresses.each do |address|
    begin
      @server.listen address, @port
      @server.listeners[listeners..-1].each do |listener|
        host, port = listener.addr.values_at 2, 1
        host = "[#{host}]" if host =~ /:/ # we don't reverse lookup
        say "Server started at http://#{host}:#{port}"
      end

      listeners = @server.listeners.length
    rescue SystemCallError
      next
    end
  end

  if @server.listeners.empty?
    say "Unable to start a server."
    say "Check for running servers or your --bind and --port arguments"
    terminate_interaction 1
  end
end
prerelease_specs(req, res) click to toggle source
# File rubygems/server.rb, line 543
def prerelease_specs(req, res)
  reset_gems

  res['content-type'] = 'application/x-gzip'

  add_date res

  specs = Gem::Specification.select do |spec|
    spec.version.prerelease?
  end.sort.map do |spec|
    platform = spec.original_platform || Gem::Platform::RUBY
    [spec.name, spec.version, platform]
  end

  specs = Marshal.dump specs

  if req.path =~ /\.gz$/
    specs = Gem::Util.gzip specs
    res['content-type'] = 'application/x-gzip'
  else
    res['content-type'] = 'application/octet-stream'
  end

  if req.request_method == 'HEAD'
    res['content-length'] = specs.length
  else
    res.body << specs
  end
end
quick(req, res) click to toggle source
# File rubygems/server.rb, line 573
def quick(req, res)
  reset_gems

  res['content-type'] = 'text/plain'
  add_date res

  case req.request_uri.path
  when %r{^/quick/(Marshal.#{Regexp.escape Gem.marshal_version}/)?(.*?)\.gemspec\.rz$} then
    marshal_format, full_name = $1, $2
    specs = Gem::Specification.find_all_by_full_name(full_name)

    selector = full_name.inspect

    if specs.empty?
      res.status = 404
      res.body = "No gems found matching #{selector}"
    elsif specs.length > 1
      res.status = 500
      res.body = "Multiple gems found matching #{selector}"
    elsif marshal_format
      res['content-type'] = 'application/x-deflate'
      res.body << Gem.deflate(Marshal.dump(specs.first))
    end
  else
    raise WEBrick::HTTPStatus::NotFound, "`#{req.path}' not found."
  end
end
rdoc(req, res) click to toggle source

Can be used for quick navigation to the rdoc documentation. You can then define a search shortcut for your browser. E.g. in Firefox connect ‘shortcut:rdoc’ to localhost:8808/rdoc?q=%s template. Then you can directly open the ActionPack documentation by typing ‘rdoc actionp’. If there are multiple hits for the search term, they are presented as a list with links.

Search algorithm aims for an intuitive search:

  1. first try to find the gems and documentation folders which name starts with the search term

  2. search for entries, that contain the search term

  3. show all the gems

If there is only one search hit, user is immediately redirected to the documentation for the particular gem, otherwise a list with results is shown.

Additional trick - install documentation for Ruby core

Note: please adjust paths accordingly use for example ‘locate yaml.rb’ and ‘gem environment’ to identify directories, that are specific for your local installation

  1. install Ruby sources

    cd /usr/src
    sudo apt-get source ruby
  2. generate documentation

    rdoc -o /usr/lib/ruby/gems/1.8/doc/core/rdoc \
      /usr/lib/ruby/1.8 ruby1.8-1.8.7.72

By typing ‘rdoc core’ you can now access the core documentation

# File rubygems/server.rb, line 734
def rdoc(req, res)
  query = req.query['q']
  show_rdoc_for_pattern("#{query}*", res) && return
  show_rdoc_for_pattern("*#{query}*", res) && return

  template = ERB.new RDOC_NO_DOCUMENTATION

  res['content-type'] = 'text/html'
  res.body = template.result binding
end
root(req, res) click to toggle source
# File rubygems/server.rb, line 601
def root(req, res)
  reset_gems

  add_date res

  raise WEBrick::HTTPStatus::NotFound, "`#{req.path}' not found." unless
    req.path == '/'

  specs = []
  total_file_count = 0

  Gem::Specification.each do |spec|
    total_file_count += spec.files.size
    deps = spec.dependencies.map do |dep|
      {
        "name"    => dep.name,
        "type"    => dep.type,
        "version" => dep.requirement.to_s,
      }
    end

    deps = deps.sort_by {|dep| [dep["name"].downcase, dep["version"]] }
    deps.last["is_last"] = true unless deps.empty?

    # executables
    executables = spec.executables.sort.collect {|exec| {"executable" => exec} }
    executables = nil if executables.empty?
    executables.last["is_last"] = true if executables

    # Pre-process spec homepage for safety reasons
    begin
      homepage_uri = URI.parse(spec.homepage)
      if [URI::HTTP, URI::HTTPS].member? homepage_uri.class
        homepage_uri = spec.homepage
      else
        homepage_uri = "."
      end
    rescue URI::InvalidURIError
      homepage_uri = "."
    end

    specs << {
      "authors"             => spec.authors.sort.join(", "),
      "date"                => spec.date.to_s,
      "dependencies"        => deps,
      "doc_path"            => doc_root(spec.full_name),
      "executables"         => executables,
      "only_one_executable" => (executables && executables.size == 1),
      "full_name"           => spec.full_name,
      "has_deps"            => !deps.empty?,
      "homepage"            => homepage_uri,
      "name"                => spec.name,
      "rdoc_installed"      => Gem::RDoc.new(spec).rdoc_installed?,
      "ri_installed"        => Gem::RDoc.new(spec).ri_installed?,
      "summary"             => spec.summary,
      "version"             => spec.version.to_s,
    }
  end

  specs << {
    "authors" => "Chad Fowler, Rich Kilmer, Jim Weirich, Eric Hodel and others",
    "dependencies" => [],
    "doc_path" => doc_root("rubygems-#{Gem::VERSION}"),
    "executables" => [{"executable" => 'gem', "is_last" => true}],
    "only_one_executable" => true,
    "full_name" => "rubygems-#{Gem::VERSION}",
    "has_deps" => false,
    "homepage" => "https://guides.rubygems.org/",
    "name" => 'rubygems',
    "ri_installed" => true,
    "summary" => "RubyGems itself",
    "version" => Gem::VERSION,
  }

  specs = specs.sort_by {|spec| [spec["name"].downcase, spec["version"]] }
  specs.last["is_last"] = true

  # tag all specs with first_name_entry
  last_spec = nil
  specs.each do |spec|
    is_first = last_spec.nil? || (last_spec["name"].downcase != spec["name"].downcase)
    spec["first_name_entry"] = is_first
    last_spec = spec
  end

  # create page from template
  template = ERB.new(DOC_TEMPLATE)
  res['content-type'] = 'text/html'

  values = { "gem_count" => specs.size.to_s, "specs" => specs,
             "total_file_count" => total_file_count.to_s }

  # suppress 1.9.3dev warning about unused variable
  values = values

  result = template.result binding
  res.body = result
end
run() click to toggle source
# File rubygems/server.rb, line 791
def run
  listen

  WEBrick::Daemon.start if @daemon

  @server.mount_proc "/specs.#{Gem.marshal_version}", method(:specs)
  @server.mount_proc "/specs.#{Gem.marshal_version}.gz", method(:specs)

  @server.mount_proc "/latest_specs.#{Gem.marshal_version}",
                     method(:latest_specs)
  @server.mount_proc "/latest_specs.#{Gem.marshal_version}.gz",
                     method(:latest_specs)

  @server.mount_proc "/prerelease_specs.#{Gem.marshal_version}",
                     method(:prerelease_specs)
  @server.mount_proc "/prerelease_specs.#{Gem.marshal_version}.gz",
                     method(:prerelease_specs)

  @server.mount_proc "/quick/", method(:quick)

  @server.mount_proc("/gem-server-rdoc-style.css") do |req, res|
    res['content-type'] = 'text/css'
    add_date res
    res.body << RDOC_CSS
  end

  @server.mount_proc "/", method(:root)

  @server.mount_proc "/rdoc", method(:rdoc)

  file_handlers = {
    '/gems' => '/cache/',
  }

  if have_rdoc_4_plus?
    @server.mount '/doc_root', RDoc::Servlet, '/doc_root'
  else
    file_handlers['/doc_root'] = '/doc/'
  end

  @gem_dirs.each do |gem_dir|
    file_handlers.each do |mount_point, mount_dir|
      @server.mount(mount_point, WEBrick::HTTPServlet::FileHandler,
                    File.join(gem_dir, mount_dir), true)
    end
  end

  trap("INT") { @server.shutdown; exit! }
  trap("TERM") { @server.shutdown; exit! }

  launch if @launch

  @server.start
end
show_rdoc_for_pattern(pattern, res) click to toggle source

Returns true and prepares http response, if rdoc for the requested gem name pattern was found.

The search is based on the file system content, not on the gems metadata. This allows additional documentation folders like ‘core’ for the Ruby core documentation - just put it underneath the main doc folder.

# File rubygems/server.rb, line 760
def show_rdoc_for_pattern(pattern, res)
  found_gems = Dir.glob("{#{@gem_dirs.join ','}}/doc/#{pattern}").select do |path|
    File.exist? File.join(path, 'rdoc/index.html')
  end
  case found_gems.length
  when 0
    return false
  when 1
    new_path = File.basename(found_gems[0])
    res.status = 302
    res['Location'] = doc_root new_path
    return true
  else
    doc_items = []
    found_gems.each do |file_name|
      base_name = File.basename(file_name)
      doc_items << {
        :name    => base_name,
        :url     => doc_root(new_path),
        :summary => '',
      }
    end

    template = ERB.new(RDOC_SEARCH_TEMPLATE)
    res['content-type'] = 'text/html'
    result = template.result binding
    res.body = result
    return true
  end
end
specs(req, res) click to toggle source
# File rubygems/server.rb, line 846
def specs(req, res)
  reset_gems

  add_date res

  specs = Gem::Specification.sort_by(&:sort_obj).map do |spec|
    platform = spec.original_platform || Gem::Platform::RUBY
    [spec.name, spec.version, platform]
  end

  specs = Marshal.dump specs

  if req.path =~ /\.gz$/
    specs = Gem::Util.gzip specs
    res['content-type'] = 'application/x-gzip'
  else
    res['content-type'] = 'application/octet-stream'
  end

  if req.request_method == 'HEAD'
    res['content-length'] = specs.length
  else
    res.body << specs
  end
end
uri_encode(str) click to toggle source
# File rubygems/server.rb, line 463
def uri_encode(str)
  str.gsub(URI::UNSAFE) do |match|
    match.each_byte.map {|c| sprintf('%%%02X', c.ord) }.join
  end
end