Class: RailsReactSSR::ServerRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_react_ssr/server_runner.rb

Overview

Executes the ReactJS package using NodeJS that was built using webpacker

Constant Summary collapse

CONSOLE_POLYFILL =

Redirect console output to be logged by an array

<<-CONSOLE_POLYFILL
const stdout = console.log;
const stderr = console.error;

const recordedLogs = [];

['log', 'info', 'debug', 'warn', 'error'].forEach(level => {
console[level] = (...args) => {
    recordedLogs.push({ level: level, args: args });
}
});
CONSOLE_POLYFILL

Class Method Summary collapse

Class Method Details

.exec!(bundle, props: {}, outputTemp: false, max_tries: 10, delay: 1000) ⇒ Object

Execute the bundled package

:props - The properties to pass to the server JS code :outputTemp - If true, output the compiled bundle to the tmp/ssr directory, pass a string to specify the

output file

:max_tries - The number of tries when getting the bundle from the webpack dev server :delay - The delay in ms between tries

Raises:



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# File 'lib/rails_react_ssr/server_runner.rb', line 35

def self.exec!(bundle, props: {}, outputTemp: false, max_tries: 10, delay: 1000)
  bundle_file = RailsReactSSR::WebpackerUtils.open_bundle bundle, max_tries: max_tries, delay: delay

  status = 0
  output = nil

  begin
    js = Tempfile.new [File.basename(bundle_file, '.*'), File.extname(bundle_file)]

    begin
      write_console_polyfill js
      write_props_polyfill js, props
      write_bundle js, bundle_file

      js.flush

      if outputTemp
        outputTemp = Rails.root.join('tmp/ssr/', bundle) if outputTemp.is_a? TrueClass

        Rails.logger.debug "Coping server bundle to #{outputTemp}"
        IO.copy_stream js.path, outputTemp
      end

      status, output = exec_contents js
    ensure
      js.unlink
    end
  rescue => e
    Rails.logger.error "Unable to execute the bundle '#{bundle}': #{e.message}"
    raise RailsReactSSR::ExecutionError.new(bundle, "Unable to run the bundle '#{bundle}'")
  ensure
    bundle_file.close
  end

  raise RailsReactSSR::ExecutionError.new(bundle,"Unable to execute the server bundle #{bundle}") unless status.zero?

  output
end