A two-way HTTP communication object for client or server applications.

The stream exposes the messages received. A text message will be of type String and a binary message will be of type List<int>.

Implements

Constants

CLOSED → int

3
CLOSING → int

2
CONNECTING → int

Possible states of the connection.

0
OPEN → int

1

Static Methods

connect(String url, { Iterable<String> protocols, Map<String, dynamic> headers, CompressionOptions compression: CompressionOptions.DEFAULT }) → Future<WebSocket>

Create a new WebSocket connection. The URL supplied in url must use the scheme ws or wss.

Constructors

WebSocket()

WebSocket.fromUpgradedSocket(Socket socket, { String protocol, bool serverSide, CompressionOptions compression: CompressionOptions.DEFAULT })

Creates a WebSocket from an already-upgraded socket.

factory

Properties

closeCode → int

The close code set when the WebSocket connection is closed. If there is no close code available this property will be null

read-only
closeReason → String

The close reason set when the WebSocket connection is closed. If there is no close reason available this property will be null

read-only
done → Future

Return a future which is completed when the StreamSink is finished.

read-only, inherited
extensions → String

The extensions property is initially the empty string. After the WebSocket connection is established this string reflects the extensions used by the server.

read-only
first → Future

Returns the first element of the stream.

read-only, inherited
hashCode → int

Get a hash code for this object.

read-only, inherited
isBroadcast → bool

Reports whether this stream is a broadcast stream.

read-only, inherited
isEmpty → Future<bool>

Reports whether this stream contains any elements.

read-only, inherited
last → Future

Returns the last element of the stream.

read-only, inherited
length → Future<int>

Counts the elements in the stream.

read-only, inherited
pingInterval → Duration

Set and get the interval for sending ping signals. If a ping message is not answered by a pong message from the peer, the WebSocket is assumed disconnected and the connection is closed with a WebSocketStatus.GOING_AWAY close code. When a ping signal is sent, the pong message must be received within pingInterval.

read / write
protocol → String

The protocol property is initially the empty string. After the WebSocket connection is established the value is the subprotocol selected by the server. If no subprotocol is negotiated the value will remain null.

read-only
readyState → int

Returns the current state of the connection.

read-only
runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited
single → Future

Returns the single element.

read-only, inherited

Operators

operator ==(other) → bool

The equality operator.

inherited

Methods

add(data) → void

Sends data on the WebSocket connection. The data in data must be either a String, or a List<int> holding bytes.

addError(errorEvent, [ StackTrace stackTrace ]) → void

Send an async error to a stream.

inherited
addStream(Stream stream) → Future

Sends data from a stream on WebSocket connection. Each data event from stream will be send as a single WebSocket frame. The data from stream must be either Strings, or List<int>s holding bytes.

addUtf8Text(List<int> bytes) → void

Sends a text message with the text represented by bytes.

any(bool test(T element)) → Future<bool>

Checks whether test accepts any element provided by this stream.

inherited
asBroadcastStream({void onListen(StreamSubscription<T> subscription), void onCancel(StreamSubscription<T> subscription) }) → Stream

Returns a multi-subscription stream that produces the same events as this.

inherited
asyncExpand<E>(Stream<E> convert(T event)) → Stream<E>

Creates a new stream with the events of a stream per original event.

inherited
asyncMap<E>(dynamic convert(T event)) → Stream<E>

Creates a new stream with each data event of this stream asynchronously mapped to a new event.

inherited
close([int code, String reason ]) → Future

Closes the WebSocket connection. Set the optional code and reason arguments to send close information to the remote peer. If they are omitted, the peer will see WebSocketStatus.NO_STATUS_RECEIVED code with no reason.

contains(Object needle) → Future<bool>

Checks whether needle occurs in the elements provided by this stream.

inherited
distinct([bool equals(T previous, T next) ]) → Stream

Skips data events if they are equal to the previous data event.

inherited
drain<E>([E futureValue ]) → Future<E>

Discards all data on the stream, but signals when it's done or an error occurred.

inherited
elementAt(int index) → Future

Returns the value of the indexth data event of this stream.

inherited
every(bool test(T element)) → Future<bool>

Checks whether test accepts all elements provided by this stream.

inherited
expand<S>(Iterable<S> convert(T value)) → Stream<S>

Creates a new stream from this stream that converts each element into zero or more events.

inherited
firstWhere(bool test(T element), { Object defaultValue() }) → Future

Finds the first element of this stream matching test.

inherited
fold<S>(S initialValue, S combine(S previous, T element)) → Future<S>

Reduces a sequence of values by repeatedly applying combine.

inherited
forEach(void action(T element)) → Future

Executes action on each data event of the stream.

inherited
handleError(Function onError, { bool test(error) }) → Stream

Creates a wrapper Stream that intercepts some errors from this stream.

inherited
join([String separator = "" ]) → Future<String>

Collects string of data events' string representations.

inherited
lastWhere(bool test(T element), { Object defaultValue() }) → Future

Finds the last element in this stream matching test.

inherited
listen(void onData(T event), { Function onError, void onDone(), bool cancelOnError }) → StreamSubscription

Adds a subscription to this stream.

inherited
map<S>(S convert(T event)) → Stream<S>

Creates a new stream that converts each element of this stream to a new value using the convert function.

inherited
noSuchMethod(Invocation invocation) → dynamic

Invoked when a non-existent method or property is accessed.

inherited
pipe(StreamConsumer streamConsumer) → Future

Pipe the events of this stream into streamConsumer.

inherited
reduce(dynamic combine(T previous, T element)) → Future

Reduces a sequence of values by repeatedly applying combine.

inherited
singleWhere(bool test(T element)) → Future

Finds the single element in this stream matching test.

inherited
skip(int count) → Stream

Skips the first count data events from this stream.

inherited
skipWhile(bool test(T element)) → Stream

Skip data events from this stream while they are matched by test.

inherited
take(int count) → Stream

Provides at most the first count data events of this stream.

inherited
takeWhile(bool test(T element)) → Stream

Forwards data events while test is successful.

inherited
timeout(Duration timeLimit, { void onTimeout(EventSink<T> sink) }) → Stream

Creates a new stream with the same events as this stream.

inherited
toList() → Future<List>

Collects the data of this stream in a List.

inherited
toSet() → Future<Set>

Collects the data of this stream in a Set.

inherited
toString() → String

Returns a string representation of this object.

inherited
transform<S>(StreamTransformer<dynamic, S> streamTransformer) → Stream<S>

Chains this stream as the input of the provided StreamTransformer.

inherited
where(bool test(T event)) → Stream

Creates a new stream from this stream that discards some data events.

inherited