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Current File : /opt/cpanel/ea-ruby27/root/usr/share/passenger/phusion_passenger/config/restart_app_command.rb
#  Phusion Passenger - https://www.phusionpassenger.com/
#  Copyright (c) 2013-2017 Phusion Holding B.V.
#
#  "Passenger", "Phusion Passenger" and "Union Station" are registered
#  trademarks of Phusion Holding B.V.
#
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the "Software"), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#  THE SOFTWARE.

require 'optparse'
require 'net/http'
require 'socket'
require 'json'
PhusionPassenger.require_passenger_lib 'constants'
PhusionPassenger.require_passenger_lib 'admin_tools/instance_registry'
PhusionPassenger.require_passenger_lib 'config/command'
PhusionPassenger.require_passenger_lib 'config/utils'
PhusionPassenger.require_passenger_lib 'utils/json'
PhusionPassenger.require_passenger_lib 'utils/ansi_colors'
PhusionPassenger.require_passenger_lib 'utils/terminal_choice_menu'

module PhusionPassenger
  module Config

    class RestartAppCommand < Command
      include PhusionPassenger::Config::Utils

      def run
        parse_options
        select_passenger_instance
        select_app_group_name
        perform_restart
      end

    private
      def self.create_option_parser(options)
        OptionParser.new do |opts|
          nl = "\n" + ' ' * 37
          opts.banner =
            "Usage 1: passenger-config restart-app <APP PATH PREFIX> [OPTIONS]\n" +
            "Usage 2: passenger-config restart-app . [OPTIONS]\n" +
            "Usage 3: passenger-config restart-app --name <APP GROUP NAME> [OPTIONS]"
          opts.separator ""
          opts.separator "  Restart an application. The syntax determines how the application that is to"
          opts.separator "  be restarted, will be selected."
          opts.separator ""
          opts.separator "  1. Selects all applications whose paths begin with the given prefix."
          opts.separator ""
          opts.separator "     Example: passenger-config restart-app /webapps"
          opts.separator "     Restarts all apps whose path begin with /webapps, such as /webapps/foo,"
          opts.separator "     /webapps/bar and /webapps123."
          opts.separator ""
          opts.separator "  2. Selects all application whose paths fall under the current working"
          opts.separator "     directory."
          opts.separator "     Example: passenger-config restart-app ."
          opts.separator "     If the current working directory is /webapps, restarts all apps whose path"
          opts.separator "     begin with /webapps, such as /webapps/foo, /webapps/bar and /webapps123."
          opts.separator ""
          opts.separator "  3. Selects a specific application based on an exact match of its app group"
          opts.separator "     name."
          opts.separator ""
          opts.separator "     Example: passenger-config restart-app --name /webapps/foo"
          opts.separator "     Restarts only /webapps/foo, but not for example /webapps/foo/bar or"
          opts.separator "     /webapps/foo123."
          opts.separator ""

          opts.separator "Options:"
          opts.on("--name APP_GROUP_NAME", String, "The app group name to select") do |value|
            options[:app_group_name] = value
          end
          opts.on("--rolling-restart", "Perform a rolling restart instead of a#{nl}" +
            "regular restart (Enterprise only). The#{nl}" +
            "default is a blocking restart") do |value|
            if Config::Utils.is_enterprise?
              options[:rolling_restart] = true
            else
              abort "--rolling-restart is only available in #{PROGRAM_NAME} Enterprise: #{ENTERPRISE_URL}"
            end
          end
          opts.on("--ignore-app-not-running", "Exit successfully if the specified#{nl}" +
            "application is not currently running. The#{nl}" +
            "default is to exit with an error") do
            options[:ignore_app_not_running] = true
          end
          opts.on("--ignore-passenger-not-running", "Exit successfully if #{PROGRAM_NAME}#{nl}" +
            "is not currently running. The default is to#{nl}" +
            "exit with an error") do
            options[:ignore_passenger_not_running] = true
          end
          opts.on("--instance NAME", String, "The #{PROGRAM_NAME} instance to select") do |value|
            options[:instance] = value
          end
          opts.on("-h", "--help", "Show this help") do
            options[:help] = true
          end
        end
      end

      def help
        puts @parser
      end

      def parse_options
        super
        case @argv.size
        when 0
          if !@options[:app_group_name] && !STDIN.tty?
            abort "Please pass either an app path prefix or an app group name. " +
              "See --help for more information."
          end
        when 1
          if @options[:app_group_name]
            abort "You've passed an app path prefix, but you cannot also pass an " +
              "app group name. Please use only either one of them. See --help " +
              "for more information."
          end
        else
          help
          abort
        end
      end

      def select_app_group_name
        @groups = []
        if app_group_name = @options[:app_group_name]
          select_app_group_name_exact(app_group_name)
        elsif @argv.empty?
          # STDIN is guaranteed to be a TTY thanks to the check in #parse_options.
          select_app_group_name_interactively
        else
          select_app_group_name_by_app_root_regex(@argv.first)
        end
      end

      def select_app_group_name_exact(name)
        query_pool_json.each do |group|
          if group[:name] == name
            @groups << group
          end
        end
        if @groups.empty?
          abort_app_not_found "There is no #{PROGRAM_NAME}-served application running " +
            "with the app group name '#{name}'."
        end
      end

      def query_group_names
        result = []
        query_pool_json.each do |group|
          result << group[:name]
        end
        result << "Cancel"
        result
      end

      def select_app_group_name_interactively
        colors = PhusionPassenger::Utils::AnsiColors.new

        choices = query_group_names
        if choices.size == 1
          # No running apps
          abort_app_not_found "#{PROGRAM_NAME} is currently not serving any applications."
        end

        puts "Please select the application to restart."
        puts colors.ansi_colorize("<gray>Tip: re-run this command with --help to learn how to automate it.</gray>")
        puts colors.ansi_colorize("<dgray>If the menu doesn't display correctly, press '!'</dgray>")
        puts
        menu = PhusionPassenger::Utils::TerminalChoiceMenu.new(choices, :single_choice)
        begin
          index, name = menu.query
        rescue Interrupt
          abort
        ensure
          STDOUT.write(colors.reset)
          STDOUT.flush
        end

        if index == choices.size - 1
          abort
        else
          puts
          select_app_group_name_exact(name)
        end
      end

      def select_app_group_name_by_app_root_regex(app_root)
        if app_root == "."
          app_root = Dir.pwd
        end
        regex = /^#{Regexp.escape(app_root)}/
        query_pool_json.each do |group|
          if group[:app_root] =~ regex
            @groups << group
          end
        end
        if @groups.empty?
          abort_app_not_found "There are no #{PROGRAM_NAME}-served applications running " +
            "whose paths begin with '#{app_root}'."
        end
      end

      def perform_restart
        restart_method = @options[:rolling_restart] ? "rolling" : "blocking"
        @groups.each do |group|
          group_name = group[:name]
          puts "Restarting #{group_name}"
          request = Net::HTTP::Post.new("/pool/restart_app_group.json")
          try_performing_full_admin_basic_auth(request, @instance)
          request.content_type = "application/json"
          request.body = PhusionPassenger::Utils::JSON.generate(
            :name => group_name,
            :restart_method => restart_method)
          response = @instance.http_request("agents.s/core_api", request)
          if response.code.to_i / 100 == 2
            response.body
          elsif response.code.to_i == 401
            print_full_admin_command_permission_error
            abort
          else
            STDERR.puts "*** An error occured while communicating with the #{PROGRAM_NAME} server:"
            STDERR.puts response.body
            abort
          end
        end
      end

      def abort_app_not_found(message)
        if @options[:ignore_app_not_running]
          STDERR.puts(message)
          exit
        else
          abort(message)
        end
      end

      def query_pool_json
        request = Net::HTTP::Get.new("/pool.json")
        try_performing_ro_admin_basic_auth(request, @instance)
        response = @instance.http_request("agents.s/core_api", request)
        if response.code.to_i / 100 == 2
          if RUBY_VERSION >= '2.3'
            JSON.parse(response.body, symbolize_names: true).to_a.map{|(key,value)| {name: key.to_s, app_root: value.dig(:app_root,0,:value)}}
          else
            JSON.parse(response.body, symbolize_names: true).to_a.map{|(key,value)| {name: key.to_s, app_root: value[:app_root][0][:value]}}
          end
        elsif response.code.to_i == 401
          if response["pool-empty"] == "true"
            []
          elsif @options[:ignore_app_not_running]
            print_instance_querying_permission_error
            exit
          else
            print_instance_querying_permission_error
            abort
          end
        else
          STDERR.puts "*** An error occured while querying the #{PROGRAM_NAME} server:"
          STDERR.puts response.body
          abort
        end
      end
    end

  end # module Config
end # module PhusionPassenger

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