Ben Konyi
a16a6537e5
This reverts commit3370a4e393. Reason for revert: Fixes landed in google3 (cl/650630536). Original change's description: > Revert "Reapply "[ Service ] Start DDS and serve DevTools when the VM service is started via dart:developer"" > > This reverts commit44d4451476. > > Reason for revert: b/350443042 > > Original change's description: > > Reapply "[ Service ] Start DDS and serve DevTools when the VM service is started via dart:developer" > > > > In the previous version of this change, if the user had 'dart' on their > > PATH and invoked 'dart compile js' (which spawns the VM service after > > compilation completes), the VM service would attempt to spawn DDS using > > './dart' as the executable path instead of 'dart'. This would result in > > DDS failing to start, causing the VM to print an error and hang. > > > > This updated change checks to see if the parent directory of > > `Platform.executable` is '.' and then verifies if './dart' exists or > > not. If it doesn't, 'dart' is likely on the user's PATH and should be > > used directly as the executable path. > > > > See https://github.com/dart-lang/sdk/issues/56087 for details. > > > > This reverts commit4b88698e48. > > > > TEST=pkg/dds/test/control_web_server_starts_dds_with_dart_on_path_test.dart > > > > Change-Id: Id0f1dadd01d9202cbf7717f31393b43171cf3968 > > Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/373561 > > Auto-Submit: Ben Konyi <bkonyi@google.com> > > Reviewed-by: Derek Xu <derekx@google.com> > > Commit-Queue: Ben Konyi <bkonyi@google.com> > > Change-Id: I424c4b91b0b108ae4c9dffa0059ed90c918897e3 > Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/373744 > Reviewed-by: Siva Annamalai <asiva@google.com> > Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> > Reviewed-by: Srujan Gaddam <srujzs@google.com> > Commit-Queue: Siva Annamalai <asiva@google.com> > Auto-Submit: Ivan Inozemtsev <iinozemtsev@google.com> Change-Id: Id7ddff5a80399203fb8058d84bc89fda2073da95 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/375000 Auto-Submit: Ben Konyi <bkonyi@google.com> Commit-Queue: Ben Konyi <bkonyi@google.com> Commit-Queue: Derek Xu <derekx@google.com> Reviewed-by: Derek Xu <derekx@google.com>
A package used to spawn the Dart Developer Service (DDS), which is used to communicate with a Dart VM Service instance and provide extended functionality to the core VM Service Protocol.
Functionality
Existing VM Service clients can issue both HTTP, websocket, and SSE requests to a running DDS instance as if it were an instance of the VM Service itself. If a request corresponds to an RPC defined in the VM Service Protocol, DDS will forward the request and return the response from the VM Service. Requests corresponding to an RPC defined in the DDS Protocol will be handled directly by the DDS instance.
SSE Support
For certain web clients it may be preferable or required to communicate with DDS using server-sent events (SSE). DDS has an SSE handler listening for requests on /$debugHandler.
SSE and package:vm_service example
import 'package:sse/sse.dart';
import 'package:vm_service/vm_service.dart';
void main() {
// Establish connection with DDS using SSE.
final ddsChannel = SseClient('${ddsUri}\$debugHandler');
// Wait for ddsChannel to be established
await ddsChannel.onOpen.first;
// Initialize VmService using the sink and stream from ddsChannel.
final vmService = VmService(
ddsChannel.stream,
(e) => ddsChannel.sink.add(e),
);
// You're ready to query DDS and the VM service!
print(await vmService.getVersion());
}