Danny Tuppeny
e891cac045
This handles an RPC Error -32000 with text "Service connection disposed" as reported in https://github.com/dart-lang/sdk/issues/60851. It extracts some of this logic into an extension on RPCError to simplify checking in multiple places. Unfortunately I can't reproduce the specific conditions that produce this error in a test (it probably requires terminated the VM Service at just the right time during startup or an isolate starting?). Fixes https://github.com/dart-lang/sdk/issues/60851 Change-Id: Iae945f60290766164d04b91d851fbb8b58f178c6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/432944 Reviewed-by: Derek Xu <derekx@google.com> Commit-Queue: Ben Konyi <bkonyi@google.com> Reviewed-by: 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());
}