sse_client_dart 3.0.0

A Dart-IO based client implementation of Server-Sent Events.

3.0.0

• Added an idempotent, awaitable EventSource.close() lifecycle API.
• Made final-listener cancellation await HTTP and decoder cleanup when closeOnLastListener is enabled.
• Added cancellable retry timers, connection generations, in-flight request abortion, and race-safe late-response handling.
• Added explicit HTTP client ownership: internally created clients are closed; injected shared clients are never closed.
• Upgraded the minimum http dependency to 1.6.0 and use AbortableRequest for request-scoped cancellation.
• Rewrote the SSE decoder to propagate done, error, pause, resume, and cancel; malformed UTF-8 is decoded with replacement characters.
• Corrected SSE parsing for default message events, comments, data-less blocks, retry validation, persistent/empty IDs, and incomplete EOF events.
• Reconnect on normal EOF and recoverable transport failures; HTTP 204, non-200 responses, and invalid content types stop the connection.
• Added autoReconnect, defaulting to true, so POST and other side-effecting requests can disable all automatic resubmission after EOF or transport failure.
• Fixed the final-listener stop race so listeners attached during asynchronous cleanup start exactly one new connection; permanent close() still wins.
• Preserve original HTTP status codes in EventSourceSubscriptionException.
• Added functional onOpen and connection-level onError streams.
• Fixed EventCache binary search, replay boundaries, missing IDs, channels, and zero/negative capacities.
• Fixed encoding of empty data and empty IDs, normalized data line endings, and validate single-line id and event fields.
• Removed unused direct collection and logging dependencies.
• Raised the declared Dart SDK minimum to 3.4.0, matching package:http.
• Added protocol, retry, ownership, race, paused-listener, and real TCP socket regression tests.

Breaking changes

• Default SSE events now have event == "message" instead of null.
• Comment-only and data-less blocks no longer emit empty events.
• Normal EOF now reconnects instead of remaining closed.
• Connection-level errors are emitted only by source.onError; source.listen(..., onError: ...) no longer receives them. A server-sent event: error remains an ordinary event on the main stream.
• Responses without text/event-stream are rejected.
• EventCache.replay() emits events after the supplied ID and emits nothing when a non-empty ID is missing.
• ProxySink callbacks are typed and required.
• EventSourceSubscriptionException fields are immutable.

2.0.0

• Continued maintenance of the FeatureHub SSE client implementation.
• Updated dependencies and Dart compatibility.

1.3.3

• Updated http from 0.13.x to 1.x.

1.3.2

• Removed leaked print statements.

1.3.1

• Fixed connection closing and ready-state notifications.

1.3.0

• Updated repository metadata and formatting.

1.2.0

• Added null safety.

1.0.0

• Initial fork and release.