Faraday::ConnectionFailed in Lti::LaunchesController#show

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          TCPSocket.open(conn_address, conn_port, @local_host, @local_port)
        rescue => e
          raise e, "Failed to open TCP connection to " +
            "#{conn_address}:#{conn_port} (#{e.message})"
        end
      }

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      D "opening connection to #{conn_address}:#{conn_port}..."
      s = Timeout.timeout(@open_timeout, Net::OpenTimeout) {
        begin
          TCPSocket.open(conn_address, conn_port, @local_host, @local_port)
        rescue => e
          raise e, "Failed to open TCP connection to " +

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          end
        }
        return yield(sec)
      ensure
        if y
          y.kill

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    if klass
      begin
        bl.call(klass)
      rescue klass => e
        bt = e.backtrace
      end

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      D "opening connection to #{conn_address}:#{conn_port}..."
      s = Timeout.timeout(@open_timeout, Net::OpenTimeout) {
        begin
          TCPSocket.open(conn_address, conn_port, @local_host, @local_port)
        rescue => e

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    def do_start
      connect
      @started = true
    end
    private :do_start

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      if block_given?
        begin
          do_start
          return yield(self)
        ensure
          do_finish

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        # Must use Net::HTTP#start and pass it a block otherwise the server's
        # TCP socket does not close correctly.
        http.start do |opened_http|
          if block_given?
            opened_http.request create_request(env) do |response|
              response.read_body(&block)

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          request_via_get_method(http, env, &block)
        else
          request_via_request_method(http, env, &block)
        end
      end

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          http_response
        else
          request_with_wrapped_block(http, env)
        end
      end

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        http_response = connection(env) do |http|
          begin
            perform_request(http, env)
          rescue *NET_HTTP_EXCEPTIONS => e
            if defined?(OpenSSL) && e.is_a?(OpenSSL::SSL::SSLError)
              raise Faraday::SSLError, e

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      return conn unless block_given?

      yield conn
    end

    # Close any persistent connections. The adapter should still be usable

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      def call(env)
        super
        http_response = connection(env) do |http|
          begin
            perform_request(http, env)
          rescue *NET_HTTP_EXCEPTIONS => e

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          env.body = params.to_query(env.params_encoder)
        end
        @app.call env
      end

      # @param env [Faraday::Env]

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    # @return [Faraday::Response]
    def build_response(connection, request)
      app.call(build_env(connection, request))
    end

    # The "rack app" wrapped in middleware. All requests are sent here.

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      end

      builder.build_response(self, request)
    end

    # Creates and configures the request object.

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      class_eval <<-RUBY, __FILE__, __LINE__ + 1
        def #{method}(url = nil, body = nil, headers = nil, &block)
          run_request(:#{method}, url, body, headers, &block)
        end
      RUBY
    end

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  # GET /launches/1.json
  def show
    Rails.application.executor.wrap { @access_token = @tool.oauth2_url.present? ? LtiService::GetAgsAccessToken.new(@tool).call : nil }
    # caliper event background job
    ToolUseEventWorker.perform_async(@tool.id, @launch.id, root_url, request.uuid)
  end

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    # Perform the work in the supplied block as an execution.
    def self.wrap
      return yield if active?

      instance = run!
      begin

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  # GET /launches/1.json
  def show
    Rails.application.executor.wrap { @access_token = @tool.oauth2_url.present? ? LtiService::GetAgsAccessToken.new(@tool).call : nil }
    # caliper event background job
    ToolUseEventWorker.perform_async(@tool.id, @launch.id, root_url, request.uuid)
  end

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  module BasicImplicitRender # :nodoc:
    def send_action(method, *args)
      super.tap { default_render unless performed? }
    end

    def default_render(*args)

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      # which is *not* necessarily the same as the action name.
      def process_action(method_name, *args)
        send_action(method_name, *args)
      end

      # Actually call the method associated with the action. Override

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    def process_action(*) #:nodoc:
      self.formats = request.formats.map(&:ref).compact
      super
    end

    # Check for double render errors and set the content_type after rendering.

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    def process_action(*args)
      run_callbacks(:process_action) do
        super
      end
    end

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        if next_sequence.final?
          next_sequence.invoke_before(env)
          env.value = !env.halted && (!block_given? || yield)
          next_sequence.invoke_after(env)
          env.value
        else

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    # <tt>process_action</tt> callbacks around the normal behavior.
    def process_action(*args)
      run_callbacks(:process_action) do
        super
      end
    end

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    private
      def process_action(*args)
        super
      rescue Exception => exception
        request.env["action_dispatch.show_detailed_exceptions"] ||= show_detailed_exceptions?
        rescue_with_handler(exception) || raise

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      ActiveSupport::Notifications.instrument("process_action.action_controller", raw_payload) do |payload|
        begin
          result = super
          payload[:status] = response.status
          result
        ensure

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      def instrument(name, payload = {})
        if notifier.listening?(name)
          instrumenter.instrument(name, payload) { yield payload if block_given? }
        else
          yield payload if block_given?
        end

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        listeners_state = start name, payload
        begin
          yield payload
        rescue Exception => e
          payload[:exception] = [e.class.name, e.message]
          payload[:exception_object] = e

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      def instrument(name, payload = {})
        if notifier.listening?(name)
          instrumenter.instrument(name, payload) { yield payload if block_given? }
        else
          yield payload if block_given?
        end

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      ActiveSupport::Notifications.instrument("start_processing.action_controller", raw_payload.dup)

      ActiveSupport::Notifications.instrument("process_action.action_controller", raw_payload) do |payload|
        begin
          result = super
          payload[:status] = response.status

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        request.filtered_parameters.merge! wrapped_filtered_hash
      end
      super
    end

    private

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        # and it won't be cleaned up by the method below.
        ActiveRecord::LogSubscriber.reset_runtime
        super
      end

      def cleanup_view_runtime

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      @_response_body = nil

      process_action(action_name, *args)
    end

    # Delegates to the class' ::controller_path

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    def process(*) #:nodoc:
      old_config, I18n.config = I18n.config, I18nProxy.new(I18n.config, lookup_context)
      super
    ensure
      I18n.config = old_config
    end

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      set_request!(request)
      set_response!(response)
      process(name)
      request.commit_flash
      to_a
    end

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        middleware_stack.build(name) { |env| new.dispatch(name, req, res) }.call req.env
      else
        new.dispatch(name, req, res)
      end
    end
  end

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        def dispatch(controller, action, req, res)
          controller.dispatch(action, req, res)
        end
      end

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          controller = controller req
          res        = controller.make_response! req
          dispatch(controller, params[:action], req, res)
        rescue ActionController::RoutingError
          if @raise_on_name_error
            raise

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          req.path_parameters = set_params.merge parameters

          status, headers, body = route.app.serve(req)

          if "pass" == headers["X-Cascade"]
            req.script_name     = script_name

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      def serve(req)
        find_routes(req).each do |match, parameters, route|
          set_params  = req.path_parameters
          path_info   = req.path_info
          script_name = req.script_name

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      def serve(req)
        find_routes(req).each do |match, parameters, route|
          set_params  = req.path_parameters
          path_info   = req.path_info
          script_name = req.script_name

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        req = make_request(env)
        req.path_info = Journey::Router::Utils.normalize_path(req.path_info)
        @router.serve(req)
      end

      def recognize_path(path, environment = {})

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    def call(env)
      env[RACK_TEMPFILES] ||= []
      status, headers, body = @app.call(env)
      body_proxy = BodyProxy.new(body) do
        env[RACK_TEMPFILES].each(&:close!) unless env[RACK_TEMPFILES].nil?
      end

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    def call(env)
      status, headers, body = @app.call(env)

      if etag_status?(status) && etag_body?(body) && !skip_caching?(headers)
        original_body = body

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      case env[REQUEST_METHOD]
      when "GET", "HEAD"
        status, headers, body = @app.call(env)
        headers = Utils::HeaderHash[headers]
        if status == 200 && fresh?(env, headers)
          status = 304

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    def call(env)
      status, headers, body = @app.call(env)

      if env[REQUEST_METHOD] == HEAD
        [

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      def call(env)
        request = ActionDispatch::Request.new env
        _, headers, _ = response = @app.call(env)

        return response unless html_response?(headers)
        return response if policy_present?(headers)

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          req = make_request env
          prepare_session(req)
          status, headers, body = app.call(req.env)
          res = Rack::Response::Raw.new status, headers
          commit_session(req, res)
          [status, headers, body]

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        def call(env)
          context(env)
        end

        def context(env, app = @app)

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      request = ActionDispatch::Request.new env

      status, headers, body = @app.call(env)

      if request.have_cookie_jar?
        cookie_jar = request.cookie_jar

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      result = run_callbacks :call do
        begin
          @app.call(env)
        rescue => error
        end
      end

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      if callbacks.empty?
        yield if block_given?
      else
        env = Filters::Environment.new(self, false, nil)
        next_sequence = callbacks.compile

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    def call(env)
      error = nil
      result = run_callbacks :call do
        begin
          @app.call(env)
        rescue => error

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    def call(env)
      request = ActionDispatch::Request.new env
      _, headers, body = response = @app.call(env)

      if headers["X-Cascade"] == "pass"
        body.close if body.respond_to?(:close)

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    def call(env)
      request = ActionDispatch::Request.new env
      @app.call(env)
    rescue Exception => exception
      if request.show_exceptions?
        render_exception(request, exception)

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          instrumenter.start "request.action_dispatch", request: request
          logger.info { started_request_message(request) }
          status, headers, body = @app.call(env)
          body = ::Rack::BodyProxy.new(body) { finish(request) }
          [status, headers, body]
        rescue Exception

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        if logger.respond_to?(:tagged)
          logger.tagged(compute_tags(request)) { call_app(request, env) }
        else
          call_app(request, env)
        end

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    def tagged(*tags)
      formatter.tagged(*tags) { yield self }
    end

    def flush

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      def tagged(*tags)
        new_tags = push_tags(*tags)
        yield self
      ensure
        pop_tags(new_tags.size)
      end

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    def tagged(*tags)
      formatter.tagged(*tags) { yield self }
    end

    def flush

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        if logger.respond_to?(:tagged)
          logger.tagged(compute_tags(request)) { call_app(request, env) }
        else
          call_app(request, env)
        end

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      req = ActionDispatch::Request.new env
      req.remote_ip = GetIp.new(req, check_ip, proxies)
      @app.call(req.env)
    end

    # The GetIp class exists as a way to defer processing of the request data

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      req = ActionDispatch::Request.new env
      req.request_id = make_request_id(req.x_request_id)
      @app.call(env).tap { |_status, headers, _body| headers[X_REQUEST_ID] = req.request_id }
    end

    private

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      end

      @app.call(env)
    end

    def method_override(env)

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    def call(env)
      start_time = Utils.clock_time
      status, headers, body = @app.call(env)
      headers = Utils::HeaderHash[headers]

      request_time = Utils.clock_time - start_time

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          def call(env)
            LocalCacheRegistry.set_cache_for(local_cache_key, LocalStore.new)
            response = @app.call(env)
            response[2] = ::Rack::BodyProxy.new(response[2]) do
              LocalCacheRegistry.set_cache_for(local_cache_key, nil)
            end

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      state = @executor.run!
      begin
        response = @app.call(env)
        returned = response << ::Rack::BodyProxy.new(response.pop) { state.complete! }
      ensure
        state.complete! unless returned

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      end

      @app.call(req.env)
    end
  end
end

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    def call(env)
      status, headers, body = @app.call(env)
      if body.respond_to?(:to_path)
        case type = variation(env)
        when 'X-Accel-Redirect'

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    def call(env)
      req = build_request env
      app.call req.env
    end

    # Defines additional Rack env configuration that is added on each call.

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      def call(env)
        env[Const::PUMA_CONFIG] = @config
        @app.call(env)
      end
    end

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      begin
        begin
          status, headers, res_body = @app.call(env)

          return :async if req.hijacked

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        while true
          case handle_request(client, buffer)
          when false
            return
          when :async

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        else
          if process_now
            process_client client, buffer
          else
            client.set_timeout @first_data_timeout
            @reactor.add client

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          begin
            block.call(work, *extra)
          rescue Exception => e
            STDERR.puts "Error reached top of thread-pool: #{e.message} (#{e.class})"
          end