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

  • legacy indexes:

Usage

gem_server = Gem::Server.new Gem.dir, 8089, false
gem_server.run
Methods
M
A
L
N
Q
R
S
Included Modules
Constants
SEARCH = <<-SEARCH <form class="headerSearch" name="headerSearchForm" method="get" action="/rdoc"> <div id="search" style="float:right"> <label for="q">Filter/Search</label> <input id="q" type="text" style="width:10em" name="q"> <button type="submit" style="display:none"></button> </div> </form> SEARCH
 
DOC_TEMPLATE = <<-'DOC_TEMPLATE' <?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>RubyGems Documentation Index</title> <link rel="stylesheet" href="gem-server-rdoc-style.css" type="text/css" media="screen" /> </head> <body> <div id="fileHeader"> <%= SEARCH %> <h1>RubyGems Documentation Index</h1> </div> <!-- banner header --> <div id="bodyContent"> <div id="contextContent"> <div id="description"> <h1>Summary</h1> <p>There are <%=values["gem_count"]%> gems installed:</p> <p> <%= values["specs"].map { |v| "<a href=\"##{v["name"]}\">#{v["name"]}</a>" }.join ', ' %>. <h1>Gems</h1> <dl> <% values["specs"].each do |spec| %> <dt> <% if spec["first_name_entry"] then %> <a name="<%=spec["name"]%>"></a> <% end %> <b><%=spec["name"]%> <%=spec["version"]%></b> <% if spec["rdoc_installed"] then %> <a href="<%=spec["doc_path"]%>">[rdoc]</a> <% else %> <span title="rdoc not installed">[rdoc]</span> <% end %> <% if spec["homepage"] then %> <a href="<%=spec["homepage"]%>" title="<%=spec["homepage"]%>">[www]</a> <% else %> <span title="no homepage available">[www]</span> <% end %> <% if spec["has_deps"] then %> - depends on <%= spec["dependencies"].map { |v| "<a href=\"##{v["name"]}\">#{v["name"]}</a>" }.join ', ' %>. <% end %> </dt> <dd> <%=spec["summary"]%> <% if spec["executables"] then %> <br/> <% if spec["only_one_executable"] then %> Executable is <% else %> Executables are <%end%> <%= spec["executables"].map { |v| "<span class=\"context-item-name\">#{v["executable"]}</span>"}.join ', ' %>. <%end%> <br/> <br/> </dd> <% end %> </dl> </div> </div> </div> <div id="validator-badges"> <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p> </div> </body> </html> DOC_TEMPLATE
 
RDOC_CSS = <<-RDOC_CSS body { font-family: Verdana,Arial,Helvetica,sans-serif; font-size: 90%; margin: 0; margin-left: 40px; padding: 0; background: white; } h1,h2,h3,h4 { margin: 0; color: #efefef; background: transparent; } h1 { font-size: 150%; } h2,h3,h4 { margin-top: 1em; } a { background: #eef; color: #039; text-decoration: none; } a:hover { background: #039; color: #eef; } /* Override the base stylesheets Anchor inside a table cell */ td > a { background: transparent; color: #039; text-decoration: none; } /* and inside a section title */ .section-title > a { background: transparent; color: #eee; text-decoration: none; } /* === Structural elements =================================== */ div#index { margin: 0; margin-left: -40px; padding: 0; font-size: 90%; } div#index a { margin-left: 0.7em; } div#index .section-bar { margin-left: 0px; padding-left: 0.7em; background: #ccc; font-size: small; } div#classHeader, div#fileHeader { width: auto; color: white; padding: 0.5em 1.5em 0.5em 1.5em; margin: 0; margin-left: -40px; border-bottom: 3px solid #006; } div#classHeader a, div#fileHeader a { background: inherit; color: white; } div#classHeader td, div#fileHeader td { background: inherit; color: white; } div#fileHeader { background: #057; } div#classHeader { background: #048; } .class-name-in-header { font-size: 180%; font-weight: bold; } div#bodyContent { padding: 0 1.5em 0 1.5em; } div#description { padding: 0.5em 1.5em; background: #efefef; border: 1px dotted #999; } div#description h1,h2,h3,h4,h5,h6 { color: #125;; background: transparent; } div#validator-badges { text-align: center; } div#validator-badges img { border: 0; } div#copyright { color: #333; background: #efefef; font: 0.75em sans-serif; margin-top: 5em; margin-bottom: 0; padding: 0.5em 2em; } /* === Classes =================================== */ table.header-table { color: white; font-size: small; } .type-note { font-size: small; color: #DEDEDE; } .xxsection-bar { background: #eee; color: #333; padding: 3px; } .section-bar { color: #333; border-bottom: 1px solid #999; margin-left: -20px; } .section-title { background: #79a; color: #eee; padding: 3px; margin-top: 2em; margin-left: -30px; border: 1px solid #999; } .top-aligned-row { vertical-align: top } .bottom-aligned-row { vertical-align: bottom } /* --- Context section classes ----------------------- */ .context-row { } .context-item-name { font-family: monospace; font-weight: bold; color: black; } .context-item-value { font-size: small; color: #448; } .context-item-desc { color: #333; padding-left: 2em; } /* --- Method classes -------------------------- */ .method-detail { background: #efefef; padding: 0; margin-top: 0.5em; margin-bottom: 1em; border: 1px dotted #ccc; } .method-heading { color: black; background: #ccc; border-bottom: 1px solid #666; padding: 0.2em 0.5em 0 0.5em; } .method-signature { color: black; background: inherit; } .method-name { font-weight: bold; } .method-args { font-style: italic; } .method-description { padding: 0 0.5em 0 0.5em; } /* --- Source code sections -------------------- */ a.source-toggle { font-size: 90%; } div.method-source-code { background: #262626; color: #ffdead; margin: 1em; padding: 0.5em; border: 1px dashed #999; overflow: hidden; } div.method-source-code pre { color: #ffdead; overflow: hidden; } /* --- Ruby keyword styles --------------------- */ .standalone-code { background: #221111; color: #ffdead; overflow: hidden; } .ruby-constant { color: #7fffd4; background: transparent; } .ruby-keyword { color: #00ffff; background: transparent; } .ruby-ivar { color: #eedd82; background: transparent; } .ruby-operator { color: #00ffee; background: transparent; } .ruby-identifier { color: #ffdead; background: transparent; } .ruby-node { color: #ffa07a; background: transparent; } .ruby-comment { color: #b22222; font-weight: bold; background: transparent; } .ruby-regexp { color: #ffa07a; background: transparent; } .ruby-value { color: #7fffd4; background: transparent; } RDOC_CSS
 

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

RDOC_NO_DOCUMENTATION = <<-'NO_DOC' <?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Found documentation</title> <link rel="stylesheet" href="gem-server-rdoc-style.css" type="text/css" media="screen" /> </head> <body> <div id="fileHeader"> <%= SEARCH %> <h1>No documentation found</h1> </div> <div id="bodyContent"> <div id="contextContent"> <div id="description"> <p>No gems matched <%= h query.inspect %></p> <p> Back to <a href="/">complete gem index</a> </p> </div> </div> </div> <div id="validator-badges"> <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p> </div> </body> </html> NO_DOC
 
RDOC_SEARCH_TEMPLATE = <<-'RDOC_SEARCH' <?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Found documentation</title> <link rel="stylesheet" href="gem-server-rdoc-style.css" type="text/css" media="screen" /> </head> <body> <div id="fileHeader"> <%= SEARCH %> <h1>Found documentation</h1> </div> <!-- banner header --> <div id="bodyContent"> <div id="contextContent"> <div id="description"> <h1>Summary</h1> <p><%=doc_items.length%> documentation topics found.</p> <h1>Topics</h1> <dl> <% doc_items.each do |doc_item| %> <dt> <b><%=doc_item[:name]%></b> <a href="<%=doc_item[:url]%>">[rdoc]</a> </dt> <dd> <%=doc_item[:summary]%> <br/> <br/> </dd> <% end %> </dl> <p> Back to <a href="/">complete gem index</a> </p> </div> </div> </div> <div id="validator-badges"> <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p> </div> </body> </html> RDOC_SEARCH
 
Attributes
[R] spec_dirs
Class Public methods
new(gem_dirs, port, daemon, launch = nil, addresses = nil)

Only the first directory in gem_dirs is used for serving gems

# File lib/rubygems/server.rb, line 436
def initialize(gem_dirs, port, daemon, launch = nil, addresses = nil)
  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 do |gem_dir|
    spec_dir = File.join gem_dir, 'specifications'

    unless File.directory? spec_dir then
      raise ArgumentError, "#{gem_dir} does not appear to be a gem repository"
    end

    spec_dir
  end

  Gem::Specification.dirs = @gem_dirs
end
run(options)
# File lib/rubygems/server.rb, line 428
def self.run(options)
  new(options[:gemdir], options[:port], options[:daemon],
      options[:launch], options[:addresses]).run
end
Instance Public methods
Marshal(req, res)
# File lib/rubygems/server.rb, line 460
def Marshal(req, res)
  Gem::Specification.reset

  add_date res

  index = Gem::Deprecate.skip_during { Marshal.dump Gem.source_index }

  if req.request_method == 'HEAD' then
    res['content-length'] = index.length
    return
  end

  if req.path =~ /Z$/ then
    res['content-type'] = 'application/x-deflate'
    index = Gem.deflate index
  else
    res['content-type'] = 'application/octet-stream'
  end

  res.body << index
end
add_date(res)
# File lib/rubygems/server.rb, line 482
def add_date res
  res['date'] = @spec_dirs.map do |spec_dir|
    File.stat(spec_dir).mtime
  end.max
end
latest_specs(req, res)
# File lib/rubygems/server.rb, line 488
def latest_specs(req, res)
  Gem::Specification.reset

  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$/ then
    specs = Gem.gzip specs
    res['content-type'] = 'application/x-gzip'
  else
    res['content-type'] = 'application/octet-stream'
  end

  if req.request_method == 'HEAD' then
    res['content-length'] = specs.length
  else
    res.body << specs
  end
end
launch()
# File lib/rubygems/server.rb, line 822
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)

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

# File lib/rubygems/server.rb, line 522
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? then
    say "Unable to start a server."
    say "Check for running servers or your --bind and --port arguments"
    terminate_interaction 1
  end
end
quick(req, res)
# File lib/rubygems/server.rb, line 549
def quick(req, res)
  Gem::Specification.reset

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

  case req.request_uri.path
  when %r^/quick/(Marshal.#{Regexp.escape Gem.marshal_version}/)?(.*?)-([0-9.]+)(-.*?)?\.gemspec\.rz$| then
    marshal_format, name, version, platform = $1, $2, $3, $4
    specs = Gem::Specification.find_all_by_name name, version

    selector = [name, version, platform].map(&:inspect).join ' '

    platform = if platform then
                 Gem::Platform.new platform.sub(/^-/, '')
               else
                 Gem::Platform::RUBY
               end

    specs = specs.select { |s| s.platform == platform }

    if specs.empty? then
      res.status = 404
      res.body = "No gems found matching #{selector}"
    elsif specs.length > 1 then
      res.status = 500
      res.body = "Multiple gems found matching #{selector}"
    elsif marshal_format then
      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)

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 containthe 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 lib/rubygems/server.rb, line 704
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)
# File lib/rubygems/server.rb, line 585
def root(req, res)
  Gem::Specification.reset
  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 { |dep|
      {
        "name"    => dep.name,
        "type"    => dep.type,
        "version" => dep.requirement.to_s,
      }
    }

    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

    specs << {
      "authors"             => spec.authors.sort.join(", "),
      "date"                => spec.date.to_s,
      "dependencies"        => deps,
      "doc_path"            => "/doc_root/#{spec.full_name}/rdoc/index.html",
      "executables"         => executables,
      "only_one_executable" => (executables && executables.size == 1),
      "full_name"           => spec.full_name,
      "has_deps"            => !deps.empty?,
      "homepage"            => spec.homepage,
      "name"                => spec.name,
      "rdoc_installed"      => Gem::DocManager.new(spec).rdoc_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}/rdoc/index.html",
    "executables" => [{"executable" => 'gem', "is_last" => true}],
    "only_one_executable" => true,
    "full_name" => "rubygems-#{Gem::VERSION}",
    "has_deps" => false,
    "homepage" => "http://docs.rubygems.org/",
    "name" => 'rubygems',
    "rdoc_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()
# File lib/rubygems/server.rb, line 754
def run
  listen

  WEBrick::Daemon.start if @daemon

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

  @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 "/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)

  paths = { "/gems" => "/cache/", "/doc_root" => "/doc/" }
  paths.each do |mount_point, mount_dir|
    @server.mount(mount_point, WEBrick::HTTPServlet::FileHandler,
                  File.join(@gem_dirs.first, mount_dir), true)
  end

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

  launch if @launch

  @server.start
end
show_rdoc_for_pattern(pattern, res)

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 lib/rubygems/server.rb, line 723
def show_rdoc_for_pattern(pattern, res)
  found_gems = Dir.glob("{#{@gem_dirs.join ','}}/doc/#{pattern}").select {|path|
    File.exist? File.join(path, 'rdoc/index.html')
  }
  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}/rdoc/index.html"
    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/#{base_name}/rdoc/index.html",
        :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)
# File lib/rubygems/server.rb, line 796
def specs(req, res)
  Gem::Specification.reset

  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$/ then
    specs = Gem.gzip specs
    res['content-type'] = 'application/x-gzip'
  else
    res['content-type'] = 'application/octet-stream'
  end

  if req.request_method == 'HEAD' then
    res['content-length'] = specs.length
  else
    res.body << specs
  end
end