dart-lang/sdk

The Dart SDK, including the VM, dart2js, core libraries, and more.

Rob Halff

@rhalff

perhaps that does work on windows, not sure.

I've upgraded the dependencies to:

dependencies:
  vm_service: ^2.1.1
  watcher: ^0.9.7+12
  glob: ^1.2.0

Rasmus Schultz

@mindplay-dk

Tried that, same same.

Renato Athaydes

@renatoathaydes

@mindplay-dk FYI I tried the hello-world server with shelf + the hot_reload lib, on Ubuntu, and I got a different error:

Paths ./bin/server.dart changed!
Reloading the application...
Unhandled exception:
SocketException: OS Error: Connection refused, errno = 111, address = localhost, port = 49406
#0      vmServiceConnectUri (package:vm_service_lib/vm_service_lib_io.dart:20:22)
<asynchronous suspension>
#1      HotReloader.reload (package:jaguar_hotreload/src/jaguar_hotreload_base.dart:350:23)
<asynchronous suspension>
#2      new HotReloader.<anonymous closure> (package:jaguar_hotreload/src/jaguar_hotreload_base.dart:124:13)
<asynchronous suspension>
#3      _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#4      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#5      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#6      _SyncBroadcastStreamController._sendData (dart:async/broadcast_stream_controller.dart:375:20)
#7      _BroadcastStreamController.add (dart:async/broadcast_stream_controller.dart:250:5)
#8      Stream.timeout.onData (dart:async/stream.dart:1568:18)
#9      _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#10     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#11     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#12     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:132:11)
#13     _WhereStream._handleData (dart:async/stream_pipe.dart:207:12)
#14     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:164:13)
#15     _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#16     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#17     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#18     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:132:11)
#19     _MapStream._handleData (dart:async/stream_pipe.dart:232:10)
#20     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:164:13)
#21     _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#22     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#23     _DelayedData.perform (dart:async/stream_impl.dart:591:14)
#24     _StreamImplEvents.handleNext (dart:async/stream_impl.dart:707:11)
#25     _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:667:7)
#26     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#27     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#28     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:391:30)
#29     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:416:5)
#30     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:12)

It probably used the wrong port, as Observatory is on another port (not sure that's the port it should use?):

Observatory listening on http://127.0.0.1:35831/R7b_Oe1tAdM=/

Renato Athaydes

@renatoathaydes

Ah! With the snippet you posted it does work for me as well... at least, when I change the response the server should return and save it, the code seems to reload as expected.

Renato Athaydes

@renatoathaydes

@mindplay-dk if nothing else works, you can do hot reloading via the Observatory directly... check this post I wrote some time ago that shows how you can do that if you don't already know.

willladislaw

@willladislaw

Are you supposed to close the file after reading contents?
error:
/credentials.json' (OS Error: Too many open files, errno = 24) on following file.

  static Future<File> get oauthCredentialsFile async {
    final path = await _localPath;
    return File('$path/credentials.json');
  }

Rob Halff

@rhalff

@willladislaw depends on the method you call after opening the file I think. if you do something like File('/etc/passwd').readAsString().then(..) it will be closed automatically, if you call something like .open() you will have to close it yourself.

Rob Halff

@rhalff

@willladislaw File is just the File object, I doesn't actually open the file yet.

Debugging too many open files can be nasty by the way, as the file which fails doesn't necessarily has to be the cause.

Seems to me that will not cause too many open files.

willladislaw

@willladislaw

Rob Halff

@rhalff

@willladislaw try setting breakpoints maybe, perhaps something being called recursively.

Randal L. Schwartz

@RandalSchwartz

Maybe that code is getting called from a build() method?

Oh, this not Flutter. :)

willladislaw

@willladislaw

tis flutter

Randal L. Schwartz

@RandalSchwartz

ahh, then my build() comment might apply

you should treat build() as if it is being called 60 times per second. It should be fast and idempotent. In practice, there are optimizations.

Rob Halff

@rhalff

@willladislaw is there any specific bloc implementation you are using? Normally the bloc will receive the repository to handle the data and then produces new states which you can handle within your UI code. That way the rendering never has to wait but is only tasked with representing the new state.

willladislaw

@willladislaw

@rhalff I'm using a simple bloc class for streams and sinks

Green Appers, Inc.

@GreenAppers

Hm. So now I want to get dart:io WebSocket running over dartssh SSH tunnel.

Seems like it would be possible to use WebSocket.fromUpgradedSocket().

But that would mean I implement dart Socket interface myself, and that I prepare the socket in correct state. Neither of which is a trivial task. It's not clear if I could use dart http to prepare the socket state (e.g. do HTTP get).

Green Appers, Inc.

@GreenAppers

So if anyone has any advice on either side, please let me know.

Ping

@ping996

does the dynamic type parameters in a function will slow the execution when it compiled to AOT mode?

bpilot

@bpilot

@ping996 Seems like a good thing to A/B test.

Ping

@ping996

thanks

bpilot

@bpilot

Sorry I don't have an answer. I'd be interested to hear what the result is though.

Renato Athaydes

@renatoathaydes

Can't Dart compile to code runnable with node.js?

bpilot

@bpilot

@renatoathaydes Hmm, I have it working

Renato Athaydes

@renatoathaydes

What do you do to run the js spilled out by the compilers?

bpilot

@bpilot

I think I had to write some stub code.

Are you using dart2js?

Renato Athaydes

@renatoathaydes

Tried both dart2js and dartdevc

dartdevc generates something like:

define(['dart_sdk'], function(dart_sdk) {

bpilot

@bpilot

This is what I did to get dart2js code to run in Node.js:
I made a JS file which exports these globals:
global.self = global;
self.module = module;
global.window = global;
global.Blob = function () { };
global.Event = function () { };
global.ImageData = function () { };
global.Node = function () { };
global.Window = function () { };

Then I do below that:
require("./mydartjsfile.js");

Renato Athaydes

@renatoathaydes

This is all??

bpilot

@bpilot

I've also got dartdevc running in Node.js before, but it is a but more involved.

Renato Athaydes

@renatoathaydes

I just need any of them to work... it's just to test.

bpilot

@bpilot

I think so. That's from some code I made to run dart2js output in Node

Renato Athaydes

@renatoathaydes

Wow, it worked :D thanks

bpilot

@bpilot

To get dartdevc working in Node, I hard to write a bunch code to recursively load & execute each ddc.js file. Took my like half a day to get it right. :-D

Renato Athaydes

@renatoathaydes

You should publish a builder for this.

bpilot

@bpilot

But dart2js is pretty basic. You just need to declare some globals it's expecting to see in a browser than Node.js lacks. There might be a way to tell Dart2JS to output Node.js-friendly code though.

Renato Athaydes

@renatoathaydes

so people could do pub run build_runner build and it would spit out a nodejs runnable module.

bpilot

@bpilot

Hmm.

Renato Athaydes

@renatoathaydes

or something like webdev build

so you would do dart2node build :)

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