Class: Morpheus::Cli::ErrorHandler

Inherits:
Object
  • Object
show all
Includes:
Term::ANSIColor
Defined in:
lib/morpheus/cli/error_handler.rb

Instance Method Summary collapse

Constructor Details

#initialize(io = $stderr) ⇒ ErrorHandler

Returns a new instance of ErrorHandler.



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# File 'lib/morpheus/cli/error_handler.rb', line 13

def initialize(io=$stderr)
  @stderr = io
end

Instance Method Details

#handle_error(err, options = {}) ⇒ Object 



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# File 'lib/morpheus/cli/error_handler.rb', line 17

def handle_error(err, options={})
  exit_code = 1
  options = (options || {}).clone
  if Morpheus::Logging.debug?
    options[:debug] = true
  end
  do_print_stacktrace = true
  
  #@stderr.puts "#{dark}Handling error #{err.class} - #{err}#{reset}"

  case (err)
  # when Morpheus::Cli::CommandNotFoundError
  #   puts_angry_error err.message
  #   @stderr.puts "Try help to see a list of available commands"
  #   do_print_stacktrace = false
  #   if err.exit_code
  #     exit_code = err.exit_code
  #   end
  when ::OptionParser::InvalidOption, ::OptionParser::AmbiguousOption, 
      ::OptionParser::MissingArgument, ::OptionParser::InvalidArgument, 
      ::OptionParser::NeedlessArgument
    # raise err
    # @stderr.puts "#{red}#{err.message}#{reset}"
    puts_angry_error err.message
    @stderr.puts err.optparse.banner if err.optparse && err.optparse.banner
    @stderr.puts "Try --help for more usage information"
    do_print_stacktrace = false
    # exit_code = 127
  when Morpheus::Cli::CommandArgumentsError
    puts_angry_error err.message
    if err.args.include?("--help") || err.args.include?("--help")
      @stderr.puts err.optparse
    else
      @stderr.puts err.optparse.banner if err.optparse && err.optparse.banner
      @stderr.puts "Try --help for more usage information"
    end
    
    do_print_stacktrace = false
    if err.exit_code
      exit_code = err.exit_code
    end

  when Morpheus::Cli::CommandError
    # this should probably always print the whole thing as red, but just does the first line for now.
    # until verify_args! replaces raise_command_error where the full parser help is in the error message..
    message_lines = err.message.split(/\r?\n/)
    first_line = message_lines.shift
    puts_angry_error first_line
    if !message_lines.empty?
      @stderr.puts message_lines.join("\n") unless message_lines.empty?
    else
      if err.args.include?("--help") || err.args.include?("--help")
        @stderr.puts err.optparse
      else
        @stderr.puts err.optparse.banner if err.optparse && err.optparse.banner && message_lines.empty?
        @stderr.puts "Try --help for more usage information"
      end
    end
    do_print_stacktrace = false
    if err.exit_code
      exit_code = err.exit_code
    end
  when Morpheus::Cli::ExpressionParser::InvalidExpression
    # @stderr.puts "#{red}#{err.message}#{reset}"
    puts_angry_error err.message
    do_print_stacktrace = false
    exit_code = 99
  when SocketError
    @stderr.puts "#{red}Error Communicating with the remote appliance.#{reset}"
    @stderr.puts "#{red}#{err.message}#{reset}"
  when RestClient::Exceptions::Timeout
    @stderr.puts "#{red}Error Communicating with the remote appliance.#{reset}"
    @stderr.puts "#{red}#{err.message}#{reset}"
  when Errno::ECONNREFUSED
    @stderr.puts "#{red}Error Communicating with the remote appliance.#{reset}"
    @stderr.puts "#{red}#{err.message}#{reset}"
  when OpenSSL::SSL::SSLError
    @stderr.puts "#{red}Error Communicating with the remote appliance.#{reset}"
    @stderr.puts "#{red}#{err.message}#{reset}"
  when RestClient::Exception
    print_rest_exception(err, options)
    # no stacktrace for now...
    return exit_code, err
  when ArgumentError
    @stderr.puts "#{red}Argument Error: #{err.message}#{reset}"
  else
    @stderr.puts "#{red}Unexpected Error#{reset}"
  end

  if do_print_stacktrace
    if options[:debug]
      if err.is_a?(Exception)
        print_stacktrace(err)
      else
        @stderr.puts err.to_s
      end
    else
      @stderr.puts "Use -V or --debug for more verbose debugging information."
    end
  end

  return exit_code, err

end

#print_rest_errors(response, options = {}) ⇒ Object 



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# File 'lib/morpheus/cli/error_handler.rb', line 190

def print_rest_errors(response, options={})
  begin
    if options[:json]
      @stderr.print red
      @stderr.print JSON.pretty_generate(response)
      @stderr.print reset, "\n"
    else
      if !response['success']
        @stderr.print red,bold
        if response['msg']
          @stderr.puts response['msg']
        end
        if response['errors']
          response['errors'].each do |key, value|
            @stderr.print "* #{key}: #{value}\n"
          end
        end
        @stderr.print reset
      else
        # this should not really happen
        @stderr.print cyan,bold, "\nSuccess!"
      end
    end
  ensure
    @stderr.print reset
  end
end

#print_rest_exception(err, options) ⇒ Object 



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# File 'lib/morpheus/cli/error_handler.rb', line 135

def print_rest_exception(err, options)
  e = err
  # heh
  if Morpheus::Logging.debug? && options[:debug].nil?
    options[:debug] = true
  end
  if err.response
    if options[:debug]
      begin
        print_rest_exception_request_and_response(e)
      ensure
        @stderr.print reset
      end
      return
    end
    if err.response.code == 400
      begin
        print_rest_errors(JSON.parse(err.response.to_s), options)
      rescue TypeError, JSON::ParserError => ex
      end
    elsif err.response.code == 404
      begin
        print_rest_errors(JSON.parse(err.response.to_s), options)
      rescue TypeError, JSON::ParserError => ex
        # not json, just 404
        @stderr.print red, "Error Communicating with the remote appliance. #{e}", reset, "\n"  
      end
    else
      @stderr.print red, "Error Communicating with the remote appliance. #{e}", reset, "\n"
      if options[:json] || options[:debug]
        begin
          response = JSON.parse(e.response.to_s)
          # @stderr.print red
          @stderr.print JSON.pretty_generate(response)
          @stderr.print reset, "\n"
        rescue TypeError, JSON::ParserError => ex
          @stderr.print red, "Failed to parse JSON response: #{ex}", reset, "\n"
          # @stderr.print red
          @stderr.print response.to_s
          @stderr.print reset, "\n"
        ensure
          @stderr.print reset
        end
      else
        @stderr.puts "Use -V or --debug for more verbose debugging information."
      end
    end
  else
    @stderr.print red, "Error Communicating with the remote appliance. #{e}", reset, "\n"
  end
  # uh, having this print method return exit_code, err to standardize return values of methods that are still calling it, at the end just by chance..
  # return exit_code, err
  return 1, err
end

#print_rest_exception_request_and_response(e) ⇒ Object 



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# File 'lib/morpheus/cli/error_handler.rb', line 241

def print_rest_exception_request_and_response(e)
  @stderr.puts "#{red}Error Communicating with the remote appliance. (HTTP #{e.response.code})#{reset}"
  response = e.response
  request = response.instance_variable_get("@request")
  @stderr.print red
  print_rest_request(request)
  @stderr.print "\n"
  print_rest_response(response)
  @stderr.print reset
end

#print_rest_request(req) ⇒ Object 



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# File 'lib/morpheus/cli/error_handler.rb', line 218

def print_rest_request(req)
  @stderr.print "REQUEST"
  @stderr.print "\n"
  @stderr.print "#{req.method.to_s.upcase} #{req.url.inspect}"
  @stderr.print "\n"
end

#print_rest_response(res) ⇒ Object 



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# File 'lib/morpheus/cli/error_handler.rb', line 225

def print_rest_response(res)
  # size = @raw_response ? File.size(@tf.path) : (res.body.nil? ? 0 : res.body.size)
  size = (res.body.nil? ? 0 : res.body.size)
  @stderr.print "RESPONSE"
  @stderr.print "\n"
  display_size = Filesize.from("#{size} B").pretty rescue size
  @stderr.print "HTTP #{res.net_http_res.code} #{res.net_http_res.message} | #{(res['Content-type'] || '').gsub(/;.*$/, '')} #{display_size}"
  @stderr.print "\n"
  begin
    @stderr.print JSON.pretty_generate(JSON.parse(res.body))
  rescue
    @stderr.print res.body.to_s
  end
  @stderr.print "\n"
end

#print_stacktrace(err) ⇒ Object 



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# File 'lib/morpheus/cli/error_handler.rb', line 122

def print_stacktrace(err)
  @stderr.print red, "\n", "#{err.class}: #{err.message}", "\n", reset
  @stderr.print err.backtrace.join("\n"), "\n\n"
end