Class: Puma::Server
- Inherits:
-
Object
- Object
- Puma::Server
- Extended by:
- Delegation
- Includes:
- Const
- Defined in:
- lib/puma/server.rb
Overview
The HTTP Server itself. Serves out a single Rack app.
Constant Summary
Constants included from Const
Const::CGI_VER, Const::CHUNK_SIZE, Const::CLOSE, Const::CLOSE_CHUNKED, Const::CODE_NAME, Const::COLON, Const::CONNECTION_CLOSE, Const::CONNECTION_KEEP_ALIVE, Const::CONTENT_LENGTH, Const::CONTENT_LENGTH2, Const::CONTENT_LENGTH_S, Const::CONTENT_TYPE, Const::DATE, Const::ERROR_400_RESPONSE, Const::ERROR_404_RESPONSE, Const::ERROR_408_RESPONSE, Const::ERROR_500_RESPONSE, Const::ERROR_503_RESPONSE, Const::ETAG, Const::ETAG_FORMAT, Const::FAST_TRACK_KA_TIMEOUT, Const::FIRST_DATA_TIMEOUT, Const::GATEWAY_INTERFACE, Const::GET, Const::HALT_COMMAND, Const::HEAD, Const::HIJACK, Const::HIJACK_IO, Const::HIJACK_P, Const::HOST, Const::HTTP, Const::HTTPS, Const::HTTPS_KEY, Const::HTTP_10, Const::HTTP_10_200, Const::HTTP_11, Const::HTTP_11_200, Const::HTTP_CONNECTION, Const::HTTP_HOST, Const::HTTP_IF_MODIFIED_SINCE, Const::HTTP_IF_NONE_MATCH, Const::HTTP_VERSION, Const::HTTP_X_FORWARDED_FOR, Const::KEEP_ALIVE, Const::LAST_MODIFIED, Const::LINE_END, Const::LOCALHOST, Const::MAX_BODY, Const::MAX_HEADER, Const::NEWLINE, Const::PATH_INFO, Const::PERSISTENT_TIMEOUT, Const::PORT_443, Const::PORT_80, Const::PUMA_CONFIG, Const::PUMA_SOCKET, Const::PUMA_TMP_BASE, Const::PUMA_VERSION, Const::RACK_AFTER_REPLY, Const::RACK_INPUT, Const::RACK_URL_SCHEME, Const::REDIRECT, Const::REMOTE_ADDR, Const::REQUEST_METHOD, Const::REQUEST_PATH, Const::REQUEST_URI, Const::RESTART_COMMAND, Const::SCRIPT_NAME, Const::SERVER_NAME, Const::SERVER_PORT, Const::SERVER_PROTOCOL, Const::SERVER_SOFTWARE, Const::SLASH, Const::STATUS_FORMAT, Const::STOP_COMMAND, Const::TRANSFER_ENCODING, Const::TRANSFER_ENCODING_CHUNKED, Const::WRITE_TIMEOUT
Instance Attribute Summary collapse
-
#app ⇒ Object
Returns the value of attribute app.
-
#auto_trim_time ⇒ Object
Returns the value of attribute auto_trim_time.
-
#binder ⇒ Object
Returns the value of attribute binder.
-
#events ⇒ Object
readonly
Returns the value of attribute events.
-
#first_data_timeout ⇒ Object
Returns the value of attribute first_data_timeout.
-
#leak_stack_on_error ⇒ Object
Returns the value of attribute leak_stack_on_error.
-
#max_threads ⇒ Object
Returns the value of attribute max_threads.
-
#min_threads ⇒ Object
Returns the value of attribute min_threads.
-
#persistent_timeout ⇒ Object
Returns the value of attribute persistent_timeout.
-
#thread ⇒ Object
readonly
Returns the value of attribute thread.
Instance Method Summary collapse
- #backlog ⇒ Object
- #begin_restart ⇒ Object
-
#cork_socket(socket) ⇒ Object
6 == Socket::IPPROTO_TCP 3 == TCP_CORK 1/0 == turn on/off.
- #default_server_port(env) ⇒ Object
-
#graceful_shutdown ⇒ Object
Wait for all outstanding requests to finish.
- #halt(sync = false) ⇒ Object
-
#handle_check ⇒ Object
:nodoc:.
-
#handle_request(req, lines) ⇒ Object
Given the request
env
fromclient
and a partial request body inbody
, finish reading the body if there is one and invoke the rack app. - #handle_servers ⇒ Object
- #handle_servers_lopez_mode ⇒ Object
- #inherit_binder(bind) ⇒ Object
-
#initialize(app, events = Events.stdio, options = {}) ⇒ Server
constructor
Create a server for the rack app
app
. -
#lowlevel_error(e) ⇒ Object
A fallback rack response if @app raises as exception.
-
#normalize_env(env, client) ⇒ Object
Given a Hash
env
for the request read fromclient
, add and fixup keys to comply with Rack’s env guidelines. -
#process_client(client, buffer) ⇒ Object
Given a connection on
client
, handle the incoming requests. -
#read_body(env, client, body, cl) ⇒ Object
Given the requset
env
fromclient
and the partial bodybody
plus a potential Content-Length valuecl
, finish reading the body and return it. -
#run(background = true) ⇒ Object
Runs the server.
-
#run_lopez_mode(background = true) ⇒ Object
Lopez Mode == raw tcp apps.
- #running ⇒ Object
-
#stop(sync = false) ⇒ Object
Stops the acceptor thread and then causes the worker threads to finish off the request queue before finally exiting.
- #tcp_mode! ⇒ Object
- #uncork_socket(socket) ⇒ Object
Methods included from Delegation
Constructor Details
#initialize(app, events = Events.stdio, options = {}) ⇒ Server
Create a server for the rack app app
.
events
is an object which will be called when certain error events occur to be handled. See Puma::Events for the list of current methods to implement.
Server#run returns a thread that you can join on to wait for the server to do it’s work.
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# File 'lib/puma/server.rb', line 52 def initialize(app, events=Events.stdio, ={}) @app = app @events = events @check, @notify = Puma::Util.pipe @status = :stop @min_threads = 0 @max_threads = 16 @auto_trim_time = 1 @thread = nil @thread_pool = nil @persistent_timeout = PERSISTENT_TIMEOUT @binder = Binder.new(events) @own_binder = true @first_data_timeout = FIRST_DATA_TIMEOUT @leak_stack_on_error = true @options = ENV['RACK_ENV'] ||= "development" @mode = :http end |
Instance Attribute Details
#app ⇒ Object
Returns the value of attribute app.
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# File 'lib/puma/server.rb', line 36 def app @app end |
#auto_trim_time ⇒ Object
Returns the value of attribute auto_trim_time.
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# File 'lib/puma/server.rb', line 41 def auto_trim_time @auto_trim_time end |
#binder ⇒ Object
Returns the value of attribute binder.
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# File 'lib/puma/server.rb', line 83 def binder @binder end |
#events ⇒ Object (readonly)
Returns the value of attribute events.
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# File 'lib/puma/server.rb', line 35 def events @events end |
#first_data_timeout ⇒ Object
Returns the value of attribute first_data_timeout.
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# File 'lib/puma/server.rb', line 42 def first_data_timeout @first_data_timeout end |
#leak_stack_on_error ⇒ Object
Returns the value of attribute leak_stack_on_error.
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# File 'lib/puma/server.rb', line 83 def leak_stack_on_error @leak_stack_on_error end |
#max_threads ⇒ Object
Returns the value of attribute max_threads.
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# File 'lib/puma/server.rb', line 39 def max_threads @max_threads end |
#min_threads ⇒ Object
Returns the value of attribute min_threads.
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# File 'lib/puma/server.rb', line 38 def min_threads @min_threads end |
#persistent_timeout ⇒ Object
Returns the value of attribute persistent_timeout.
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# File 'lib/puma/server.rb', line 40 def persistent_timeout @persistent_timeout end |
#thread ⇒ Object (readonly)
Returns the value of attribute thread.
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# File 'lib/puma/server.rb', line 34 def thread @thread end |
Instance Method Details
#backlog ⇒ Object
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# File 'lib/puma/server.rb', line 126 def backlog @thread_pool and @thread_pool.backlog end |
#begin_restart ⇒ Object
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# File 'lib/puma/server.rb', line 772 def begin_restart begin @notify << RESTART_COMMAND rescue IOError # The server, in another thread, is shutting down end end |
#cork_socket(socket) ⇒ Object
6 == Socket::IPPROTO_TCP 3 == TCP_CORK 1/0 == turn on/off
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# File 'lib/puma/server.rb', line 105 def cork_socket(socket) begin socket.setsockopt(6, 3, 1) if socket.kind_of? TCPSocket rescue IOError, SystemCallError end end |
#default_server_port(env) ⇒ Object
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# File 'lib/puma/server.rb', line 452 def default_server_port(env) env['HTTP_X_FORWARDED_PROTO'] == 'https' ? PORT_443 : PORT_80 end |
#graceful_shutdown ⇒ Object
Wait for all outstanding requests to finish.
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# File 'lib/puma/server.rb', line 723 def graceful_shutdown if @options[:drain_on_shutdown] count = 0 while true ios = IO.select @binder.ios, nil, nil, 0 break unless ios ios.first.each do |sock| begin if io = sock.accept_nonblock count += 1 client = Client.new io, @binder.env(sock) @thread_pool << client end rescue SystemCallError end end end @events.debug "Drained #{count} additional connections." end @thread_pool.shutdown if @thread_pool end |
#halt(sync = false) ⇒ Object
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# File 'lib/puma/server.rb', line 762 def halt(sync=false) begin @notify << HALT_COMMAND rescue IOError # The server, in another thread, is shutting down end @thread.join if @thread && sync end |
#handle_check ⇒ Object
:nodoc:
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# File 'lib/puma/server.rb', line 332 def handle_check cmd = @check.read(1) case cmd when STOP_COMMAND @status = :stop return true when HALT_COMMAND @status = :halt return true when RESTART_COMMAND @status = :restart return true end return false end |
#handle_request(req, lines) ⇒ Object
Given the request env
from client
and a partial request body in body
, finish reading the body if there is one and invoke the rack app. Then construct the response and write it back to client
cl
is the previously fetched Content-Length header if there was one. This is an optimization to keep from having to look it up again.
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# File 'lib/puma/server.rb', line 465 def handle_request(req, lines) env = req.env client = req.io normalize_env env, client env[PUMA_SOCKET] = client env[HIJACK_P] = true env[HIJACK] = req body = req.body head = env[REQUEST_METHOD] == HEAD env[RACK_INPUT] = body env[RACK_URL_SCHEME] = env[HTTPS_KEY] ? HTTPS : HTTP # A rack extension. If the app writes #call'ables to this # array, we will invoke them when the request is done. # after_reply = env[RACK_AFTER_REPLY] = [] begin begin status, headers, res_body = @app.call(env) return :async if req.hijacked status = status.to_i if status == -1 unless headers.empty? and res_body == [] raise "async response must have empty headers and body" end return :async end rescue StandardError => e @events.unknown_error self, e, "Rack app" status, headers, res_body = lowlevel_error(e) end content_length = nil no_body = head if res_body.kind_of? Array and res_body.size == 1 content_length = res_body[0].bytesize end cork_socket client line_ending = LINE_END colon = COLON if env[HTTP_VERSION] == HTTP_11 allow_chunked = true keep_alive = env[HTTP_CONNECTION] != CLOSE include_keepalive_header = false # An optimization. The most common response is 200, so we can # reply with the proper 200 status without having to compute # the response header. # if status == 200 lines << HTTP_11_200 else lines.append "HTTP/1.1 ", status.to_s, " ", fetch_status_code(status), line_ending no_body ||= status < 200 || STATUS_WITH_NO_ENTITY_BODY[status] end else allow_chunked = false keep_alive = env[HTTP_CONNECTION] == KEEP_ALIVE include_keepalive_header = keep_alive # Same optimization as above for HTTP/1.1 # if status == 200 lines << HTTP_10_200 else lines.append "HTTP/1.0 ", status.to_s, " ", fetch_status_code(status), line_ending no_body ||= status < 200 || STATUS_WITH_NO_ENTITY_BODY[status] end end response_hijack = nil headers.each do |k, vs| case k when CONTENT_LENGTH2 content_length = vs next when TRANSFER_ENCODING allow_chunked = false content_length = nil when HIJACK response_hijack = vs next end if vs.respond_to?(:to_s) vs.to_s.split(NEWLINE).each do |v| lines.append k, colon, v, line_ending end else lines.append k, colon, line_ending end end if no_body if content_length and status != 204 lines.append CONTENT_LENGTH_S, content_length.to_s, line_ending end lines << line_ending fast_write client, lines.to_s return keep_alive end if include_keepalive_header lines << CONNECTION_KEEP_ALIVE elsif !keep_alive lines << CONNECTION_CLOSE end unless response_hijack if content_length lines.append CONTENT_LENGTH_S, content_length.to_s, line_ending chunked = false elsif allow_chunked lines << TRANSFER_ENCODING_CHUNKED chunked = true end end lines << line_ending fast_write client, lines.to_s if response_hijack response_hijack.call client return :async end begin res_body.each do |part| if chunked fast_write client, part.bytesize.to_s(16) fast_write client, line_ending fast_write client, part fast_write client, line_ending else fast_write client, part end client.flush end if chunked fast_write client, CLOSE_CHUNKED client.flush end rescue SystemCallError, IOError raise ConnectionError, "Connection error detected during write" end ensure uncork_socket client body.close res_body.close if res_body.respond_to? :close after_reply.each { |o| o.call } end return keep_alive end |
#handle_servers ⇒ Object
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# File 'lib/puma/server.rb', line 280 def handle_servers begin check = @check sockets = [check] + @binder.ios pool = @thread_pool while @status == :run begin ios = IO.select sockets ios.first.each do |sock| if sock == check break if handle_check else begin if io = sock.accept_nonblock client = Client.new io, @binder.env(sock) pool << client end rescue SystemCallError end end end rescue Errno::ECONNABORTED # client closed the socket even before accept client.close rescue nil rescue Object => e @events.unknown_error self, e, "Listen loop" end end @events.fire :state, @status graceful_shutdown if @status == :stop || @status == :restart @reactor.clear! if @status == :restart @reactor.shutdown rescue Exception => e STDERR.puts "Exception handling servers: #{e.} (#{e.class})" STDERR.puts e.backtrace ensure @check.close @notify.close if @status != :restart and @own_binder @binder.close end end @events.fire :state, :done end |
#handle_servers_lopez_mode ⇒ Object
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# File 'lib/puma/server.rb', line 173 def handle_servers_lopez_mode begin check = @check sockets = [check] + @binder.ios pool = @thread_pool while @status == :run begin ios = IO.select sockets ios.first.each do |sock| if sock == check break if handle_check else begin if io = sock.accept_nonblock client = Client.new io, nil pool << client end rescue SystemCallError end end end rescue Errno::ECONNABORTED # client closed the socket even before accept client.close rescue nil rescue Object => e @events.unknown_error self, e, "Listen loop" end end @events.fire :state, @status graceful_shutdown if @status == :stop || @status == :restart rescue Exception => e STDERR.puts "Exception handling servers: #{e.} (#{e.class})" STDERR.puts e.backtrace ensure @check.close @notify.close if @status != :restart and @own_binder @binder.close end end @events.fire :state, :done end |
#inherit_binder(bind) ⇒ Object
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# File 'lib/puma/server.rb', line 89 def inherit_binder(bind) @binder = bind @own_binder = false end |
#lowlevel_error(e) ⇒ Object
A fallback rack response if @app raises as exception.
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# File 'lib/puma/server.rb', line 709 def lowlevel_error(e) if handler = @options[:lowlevel_error_handler] return handler.call(e) end if @leak_stack_on_error [500, {}, ["Puma caught this error: #{e.} (#{e.class})\n#{e.backtrace.join("\n")}"]] else [500, {}, ["A really lowlevel plumbing error occured. Please contact your local Maytag(tm) repair man.\n"]] end end |
#normalize_env(env, client) ⇒ Object
Given a Hash env
for the request read from client
, add and fixup keys to comply with Rack’s env guidelines.
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# File 'lib/puma/server.rb', line 411 def normalize_env(env, client) if host = env[HTTP_HOST] if colon = host.index(":") env[SERVER_NAME] = host[0, colon] env[SERVER_PORT] = host[colon+1, host.bytesize] else env[SERVER_NAME] = host env[SERVER_PORT] = default_server_port(env) end else env[SERVER_NAME] = LOCALHOST env[SERVER_PORT] = default_server_port(env) end unless env[REQUEST_PATH] # it might be a dumbass full host request header uri = URI.parse(env[REQUEST_URI]) env[REQUEST_PATH] = uri.path raise "No REQUEST PATH" unless env[REQUEST_PATH] end env[PATH_INFO] = env[REQUEST_PATH] # From http://www.ietf.org/rfc/rfc3875 : # "Script authors should be aware that the REMOTE_ADDR and # REMOTE_HOST meta-variables (see sections 4.1.8 and 4.1.9) # may not identify the ultimate source of the request. # They identify the client for the immediate request to the # server; that client may be a proxy, gateway, or other # intermediary acting on behalf of the actual source client." # addr = client.peeraddr.last # Set unix socket addrs to localhost addr = "127.0.0.1" if addr.empty? env[REMOTE_ADDR] = addr end |
#process_client(client, buffer) ⇒ Object
Given a connection on client
, handle the incoming requests.
This method support HTTP Keep-Alive so it may, depending on if the client indicates that it supports keep alive, wait for another request before returning.
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# File 'lib/puma/server.rb', line 356 def process_client(client, buffer) begin close_socket = true while true case handle_request(client, buffer) when false return when :async close_socket = false return when true buffer.reset unless client.reset(@status == :run) close_socket = false client.set_timeout @persistent_timeout @reactor.add client return end end end # The client disconnected while we were reading data rescue ConnectionError # Swallow them. The ensure tries to close +client+ down # The client doesn't know HTTP well rescue HttpParserError => e client.write_400 @events.parse_error self, client.env, e # Server error rescue StandardError => e client.write_500 @events.unknown_error self, e, "Read" ensure buffer.reset begin client.close if close_socket rescue IOError, SystemCallError # Already closed rescue StandardError => e @events.unknown_error self, e, "Client" end end end |
#read_body(env, client, body, cl) ⇒ Object
Given the requset env
from client
and the partial body body
plus a potential Content-Length value cl
, finish reading the body and return it.
If the body is larger than MAX_BODY, a Tempfile object is used for the body, otherwise a StringIO is used.
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# File 'lib/puma/server.rb', line 660 def read_body(env, client, body, cl) content_length = cl.to_i remain = content_length - body.bytesize return StringIO.new(body) if remain <= 0 # Use a Tempfile if there is a lot of data left if remain > MAX_BODY stream = Tempfile.new(Const::PUMA_TMP_BASE) stream.binmode else # The body[0,0] trick is to get an empty string in the same # encoding as body. stream = StringIO.new body[0,0] end stream.write body # Read an odd sized chunk so we can read even sized ones # after this chunk = client.readpartial(remain % CHUNK_SIZE) # No chunk means a closed socket unless chunk stream.close return nil end remain -= stream.write(chunk) # Raed the rest of the chunks while remain > 0 chunk = client.readpartial(CHUNK_SIZE) unless chunk stream.close return nil end remain -= stream.write(chunk) end stream.rewind return stream end |
#run(background = true) ⇒ Object
Runs the server.
If background
is true (the default) then a thread is spun up in the background to handle requests. Otherwise requests are handled synchronously.
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# File 'lib/puma/server.rb', line 227 def run(background=true) BasicSocket.do_not_reverse_lookup = true @events.fire :state, :booting @status = :run if @mode == :tcp return run_lopez_mode(background) end @thread_pool = ThreadPool.new(@min_threads, @max_threads, IOBuffer) do |client, buffer| process_now = false begin process_now = client.eagerly_finish rescue HttpParserError => e client.write_400 client.close @events.parse_error self, client.env, e rescue ConnectionError client.close else if process_now process_client client, buffer else client.set_timeout @first_data_timeout @reactor.add client end end end @reactor = Reactor.new self, @thread_pool @reactor.run_in_thread if @auto_trim_time @thread_pool.auto_trim!(@auto_trim_time) end @events.fire :state, :running if background @thread = Thread.new { handle_servers } return @thread else handle_servers end end |
#run_lopez_mode(background = true) ⇒ Object
Lopez Mode == raw tcp apps
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# File 'lib/puma/server.rb', line 136 def run_lopez_mode(background=true) @thread_pool = ThreadPool.new(@min_threads, @max_threads, Hash) do |client, tl| io = client.to_io addr = io.peeraddr.last if addr.empty? # Set unix socket addrs to localhost addr = "127.0.0.1:0" else addr = "#{addr}:#{io.peeraddr[1]}" end env = { 'thread' => tl, REMOTE_ADDR => addr } begin @app.call env, client.to_io rescue Object => e STDERR.puts "! Detected exception at toplevel: #{e.} (#{e.class})" STDERR.puts e.backtrace end client.close unless env['detach'] end @events.fire :state, :running if background @thread = Thread.new { handle_servers_lopez_mode } return @thread else handle_servers_lopez_mode end end |
#running ⇒ Object
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# File 'lib/puma/server.rb', line 130 def running @thread_pool and @thread_pool.spawned end |
#stop(sync = false) ⇒ Object
Stops the acceptor thread and then causes the worker threads to finish off the request queue before finally exiting.
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# File 'lib/puma/server.rb', line 752 def stop(sync=false) begin @notify << STOP_COMMAND rescue IOError # The server, in another thread, is shutting down end @thread.join if @thread && sync end |
#tcp_mode! ⇒ Object
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# File 'lib/puma/server.rb', line 94 def tcp_mode! @mode = :tcp end |
#uncork_socket(socket) ⇒ Object
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# File 'lib/puma/server.rb', line 112 def uncork_socket(socket) begin socket.setsockopt(6, 3, 0) if socket.kind_of? TCPSocket rescue IOError, SystemCallError end end |