First pass at CLI for Ruby client.
git-svn-id: https://google-api-ruby-client.googlecode.com/svn/trunk@53 c1d61fac-ed7f-fcc1-18f7-ff78120a04ef
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#!/usr/bin/env ruby
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bin_dir = File.expand_path("..", __FILE__)
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lib_dir = File.expand_path("../lib", bin_dir)
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$LOAD_PATH.unshift(lib_dir)
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$LOAD_PATH.uniq!
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OAUTH_SERVER_PORT = 12736
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require 'rubygems'
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require 'optparse'
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require 'google/api_client/version'
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require 'google/api_client'
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ARGV.unshift('--help') if ARGV.empty?
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command = 'execute'
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options = {}
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OptionParser.new do |opts|
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  opts.banner =
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    "Usage: google-api <rpcname> [options] -- <parameters>\n" +
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    "   or: google-api --oauth-login=<scope> [options]\n" +
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    "   or: google-api --fuzz [options]"
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  opts.separator ""
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  opts.on(
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      "--oauth-login <scope>", String, "Authorize for the scope") do |s|
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    command = 'oauth-login'
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    options[:scope] = s
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  end
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  opts.on(
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      "-s", "--service <name>", String, "Perform discovery on service") do |s|
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    options[:service_name] = s
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  end
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  opts.on(
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      "--service-version <id>", String, "Select service version") do |id|
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    options[:service_version] = id
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  end
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  opts.on("--fuzz [rpcname]", String, "Fuzz an API or endpoint") do |rpcname|
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    command = 'fuzz'
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    options[:fuzz] = rpcname
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  end
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  opts.on_tail("-v", "--verbose", "Run verbosely") do |v|
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    options[:verbose] = v
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  end
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  opts.on_tail("-h", "--help", "Show this message") do
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    puts opts
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    exit
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  end
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  opts.on_tail("--version", "Show version") do
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    puts "google-api-client (#{Google::APIClient::VERSION::STRING})"
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    exit
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  end
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end.parse!
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if command == 'oauth-login' # Guard to keep start-up time short
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  require 'webrick'
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  # Used for oauth login
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  class OAuthVerifierServlet < WEBrick::HTTPServlet::AbstractServlet
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    def do_GET(request, response)
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      $verifier ||= Addressable::URI.unencode_component(
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        request.request_uri.to_s[/\?.*oauth_verifier=([^&$]+)(&|$)/, 1]
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      )
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      response.status = WEBrick::HTTPStatus::RC_ACCEPTED
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      # This javascript will auto-close the tab after the verifier is obtained.
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      response.body = <<-HTML
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<html>
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  <head>
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    <script>
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      function closeWindow() { 
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        window.open('', '_self', '');
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        window.close();
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      }
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      setTimeout(closeWindow, 10);
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    </script>
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  </head>
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  <body>
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    You may close this window.
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  </body>
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</html>
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HTML
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      self.instance_variable_get('@server').stop
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    end
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  end
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end
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def oauth_login(options={})
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  require 'signet/oauth_1/client'
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  require 'launchy'
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  require 'yaml'
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  $verifier = nil
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  logger = WEBrick::Log.new('/dev/null') # TODO(bobaman): Cross-platform?
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  server = WEBrick::HTTPServer.new(
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    :Port => OAUTH_SERVER_PORT,
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    :Logger => logger,
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    :AccessLog => logger
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  )
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  trap("INT") { server.shutdown }
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  server.mount("/", OAuthVerifierServlet)
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  oauth_client = Signet::OAuth1::Client.new(
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    :temporary_credential_uri =>
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      'https://www.google.com/accounts/OAuthGetRequestToken',
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    :authorization_uri =>
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      'https://www.google.com/accounts/OAuthAuthorizeToken',
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    :token_credential_uri =>
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      'https://www.google.com/accounts/OAuthGetAccessToken',
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    :client_credential_key => 'anonymous',
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    :client_credential_secret => 'anonymous',
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    :callback => "http://localhost:#{OAUTH_SERVER_PORT}/"
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  )
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  scope = options[:scope]
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  # Special cases
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  case scope
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  when "https://www.googleapis.com/auth/buzz",
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      "https://www.googleapis.com/auth/buzz.readonly"
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    oauth_client.authorization_uri =
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      'https://www.google.com/buzz/api/auth/OAuthAuthorizeToken?' +
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      "domain=#{oauth_client.client_credential_key}&" +
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      "scope=#{scope}&" +
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      "xoauth_displayname=Google%20API%20Client"
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  end
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  oauth_client.fetch_temporary_credential!(:additional_parameters => {
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    :scope => scope,
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    :xoauth_displayname => 'Google API Client'
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  })
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  # Launch browser
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  Launchy::Browser.run(oauth_client.authorization_uri.to_s)
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  server.start
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  oauth_client.fetch_token_credential!(:verifier => $verifier)
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  config = {
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    "client_credential_key" => oauth_client.client_credential_key,
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    "client_credential_secret" => oauth_client.client_credential_secret,
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    "token_credential_key" => oauth_client.token_credential_key,
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    "token_credential_secret" => oauth_client.token_credential_secret
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  }
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  config_file = File.expand_path('~/.google-api.yaml')
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  open(config_file, 'w') { |file| file.write(YAML.dump(config)) }
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  exit(0)
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end
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def execute(options={})
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  config_file = File.expand_path('~/.google-api.yaml')
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  signed = File.exist?(config_file)
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  rpcname = ARGV.detect { |p| p =~ /^[a-z0-9_-]+\.[a-z0-9_\.-]+$/i }
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  if rpcname
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    ARGV.delete(rpcname)
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  else
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    STDERR.puts('Could not find rpcname.')
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    exit(1)
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  end
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  service_name = options[:service_name] || rpcname[/^([^\.]+)\./, 1]
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  client = Google::APIClient.new(:service => service_name)
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  if signed
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    if !client.authorization.kind_of?(Signet::OAuth1::Client)
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      STDERR.puts(
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        "Unexpected authorization mechanism: #{client.authorization.class}"
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      )
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      exit(1)
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    end
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    config = open(config_file, 'r') { |file| YAML.load(file.read) }
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    client.authorization.client_credential_key =
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      config["client_credential_key"]
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    client.authorization.client_credential_secret =
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      config["client_credential_secret"]
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    client.authorization.token_credential_key =
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      config["token_credential_key"]
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    client.authorization.token_credential_secret =
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      config["token_credential_secret"]
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  end
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  service_version =
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    options[:service_version] || client.latest_service(service_name).version
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  service = client.discovered_service(service_name, service_version)
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  method = service.to_h[rpcname]
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  if !method
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    STDERR.puts(
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      "Method #{rpcname} does not exist for " +
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      "#{service_name}-#{service_version}."
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    )
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    exit(1)
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  end
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  parameters = ARGV.inject({}) do |accu, pair|
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    name, value = pair.split('=', 2)
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    accu[name] = value
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    accu
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  end
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  request_body = ''
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  input_streams, _, _ = IO.select([STDIN], [], [], 0)
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  request_body = STDIN.read || '' if input_streams
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  response = client.execute(
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    method, parameters, request_body, [], {:signed => signed}
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  )
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  status, headers, body = response
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  puts body
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  exit(0)
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end
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def fuzz(options={})
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  STDERR.puts('API fuzzing not yet supported.')
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  if rpcname
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    # Fuzz just one method
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  else
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    # Fuzz the entire API
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  end
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  exit(1)
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end
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self.send(command.gsub(/-/, "_").to_sym, options)
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    s.description = PKG_DESCRIPTION
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    s.files = PKG_FILES.to_a
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    s.executables << 'google-api'
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    s.has_rdoc = true
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    s.extra_rdoc_files = %w( README )
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