Danny Tuppeny
3ca4243818
Sometimes we see unhandled exceptions during this setup work, see: - https://github.com/flutter/flutter/issues/148346 - https://github.com/flutter/flutter/issues/148348 Currently these are unhandled and bring the debug adapter down. In VS Code, the error (send to stderr) is not visible to the user so they just see a silent crash which makes it very difficult to report (and the Flutter crash reports don't have any context). This change will send the exception to the client and then cleanly terminate, which should give the user more information to open a good bug report (assuming the issue wasn't just something like them terminating the app as it was starting). Change-Id: I4aefbc278e6a0708924c6fa41c5179d581117689 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/366662 Reviewed-by: Ben Konyi <bkonyi@google.com> Reviewed-by: Helin Shiah <helinx@google.com> Commit-Queue: Ben Konyi <bkonyi@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());
}