Initial commit
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..79f51c3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.dart_tool
+.packages
+pubspec.lock
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..e3edd12
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,42 @@
+language: dart
+# This is necessary to use proper Chrome. Travis's version of chromium is from
+# 2014.
+sudo: required
+dist: trusty
+addons:
+ apt:
+ sources:
+ - google-chrome
+ packages:
+ - google-chrome-stable
+ firefox: latest
+
+dart:
+ - dev
+ - stable
+
+with_content_shell: false
+
+matrix:
+ allow_failures:
+ - dart: dev
+
+before_install:
+ - export CHROMEDRIVER_BINARY=/usr/bin/google-chrome
+ - export CHROMEDRIVER_ARGS=--no-sandbox
+ - /usr/bin/google-chrome --version
+ - export DISPLAY=:99.0
+ - sh -e /etc/init.d/xvfb start
+
+before_script:
+ - wget http://chromedriver.storage.googleapis.com/2.35/chromedriver_linux64.zip
+ - unzip chromedriver_linux64.zip
+ - export PATH=$PATH:$PWD
+ - ./tool/travis-setup.sh
+
+script:
+ - ./tool/travis.sh
+
+cache:
+ directories:
+ - $HOME/.pub-cache
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..7c12ae6
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,6 @@
+# Below is a list of people and organizations that have contributed
+# to the Dart project. Names should be added to the list like so:
+#
+# Name/Organization <email address>
+
+Google Inc.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..6f5e0ea
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,33 @@
+Want to contribute? Great! First, read this page (including the small print at
+the end).
+
+### Before you contribute
+Before we can use your code, you must sign the
+[Google Individual Contributor License Agreement](https://cla.developers.google.com/about/google-individual)
+(CLA), which you can do online. The CLA is necessary mainly because you own the
+copyright to your changes, even after your contribution becomes part of our
+codebase, so we need your permission to use and distribute your code. We also
+need to be sure of various other things—for instance that you'll tell us if you
+know that your code infringes on other people's patents. You don't have to sign
+the CLA until after you've submitted your code for review and a member has
+approved it, but you must do it before we can put your code into our codebase.
+
+Before you start working on a larger contribution, you should get in touch with
+us first through the issue tracker with your idea so that we can help out and
+possibly guide you. Coordinating up front makes it much easier to avoid
+frustration later on.
+
+### Code reviews
+All submissions, including submissions by project members, require review.
+
+### File headers
+All files in the project must start with the following header.
+
+ // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
+ // for details. All rights reserved. Use of this source code is governed by a
+ // BSD-style license that can be found in the LICENSE file.
+
+### The small print
+Contributions made by corporations are covered by a different agreement than the
+one above, the
+[Software Grant and Corporate Contributor License Agreement](https://developers.google.com/open-source/cla/corporate).
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f75d7c2
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,26 @@
+Copyright 2019, the Dart project authors. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following
+ disclaimer in the documentation and/or other materials provided
+ with the distribution.
+ * Neither the name of Google Inc. nor the names of its
+ contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..33ea08f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+This package provides support for bi-directional communication through
+Server Sent Events and corresponding POST requests.
diff --git a/analysis_options.yaml b/analysis_options.yaml
new file mode 100644
index 0000000..b59f3bb
--- /dev/null
+++ b/analysis_options.yaml
@@ -0,0 +1,82 @@
+analyzer:
+ strong-mode:
+ implicit-casts: false
+ errors:
+ dead_code: error
+ override_on_non_overriding_method: error
+ unused_element: error
+ unused_import: error
+ unused_local_variable: error
+linter:
+ rules:
+ - always_declare_return_types
+ - annotate_overrides
+ - avoid_empty_else
+ - avoid_function_literals_in_foreach_calls
+ - avoid_init_to_null
+ - avoid_null_checks_in_equality_operators
+ - avoid_relative_lib_imports
+ - avoid_renaming_method_parameters
+ - avoid_return_types_on_setters
+ - avoid_returning_null
+ - avoid_types_as_parameter_names
+ - avoid_unused_constructor_parameters
+ - await_only_futures
+ - camel_case_types
+ - cancel_subscriptions
+ #- cascade_invocations
+ - comment_references
+ - constant_identifier_names
+ - control_flow_in_finally
+ - directives_ordering
+ - empty_catches
+ - empty_constructor_bodies
+ - empty_statements
+ - hash_and_equals
+ - implementation_imports
+ - invariant_booleans
+ - iterable_contains_unrelated_type
+ - library_names
+ - library_prefixes
+ - list_remove_unrelated_type
+ - literal_only_boolean_expressions
+ - no_adjacent_strings_in_list
+ - no_duplicate_case_values
+ - non_constant_identifier_names
+ - null_closures
+ - omit_local_variable_types
+ - only_throw_errors
+ - overridden_fields
+ - package_api_docs
+ - package_names
+ - package_prefixed_library_names
+ - prefer_adjacent_string_concatenation
+ - prefer_collection_literals
+ - prefer_conditional_assignment
+ - prefer_const_constructors
+ - prefer_contains
+ - prefer_equal_for_default_values
+ - prefer_final_fields
+ #- prefer_final_locals
+ - prefer_initializing_formals
+ - prefer_interpolation_to_compose_strings
+ - prefer_is_empty
+ - prefer_is_not_empty
+ - prefer_single_quotes
+ - prefer_typing_uninitialized_variables
+ - recursive_getters
+ - slash_for_doc_comments
+ - super_goes_last
+ - test_types_in_equals
+ - throw_in_finally
+ - type_init_formals
+ - unawaited_futures
+ - unnecessary_brace_in_string_interps
+ - unnecessary_getters_setters
+ - unnecessary_lambdas
+ - unnecessary_null_aware_assignments
+ - unnecessary_statements
+ - unnecessary_this
+ - unrelated_type_equality_checks
+ - use_rethrow_when_possible
+ - valid_regexps
diff --git a/lib/client/sse_client.dart b/lib/client/sse_client.dart
new file mode 100644
index 0000000..02760fe
--- /dev/null
+++ b/lib/client/sse_client.dart
@@ -0,0 +1,86 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:html';
+
+import 'package:http/browser_client.dart';
+import 'package:stream_channel/stream_channel.dart';
+import 'package:uuid/uuid.dart';
+
+/// A client for bi-directional sse communcation.
+///
+/// The client can send any JSON-encodable messages to the server by adding
+/// them to the [sink] and listen to messages from the server on the [stream].
+class SseClient extends StreamChannelMixin<String> {
+ final _incomingController = new StreamController<String>();
+
+ final _outgoingController = new StreamController<String>();
+
+ final _client = new BrowserClient()..withCredentials = true;
+
+ EventSource _eventSource;
+
+ String _serverUrl;
+
+ /// [serverUrl] is the URL under which the server is listening for
+ /// incoming bi-directional SSE connections.
+ SseClient(String serverUrl) {
+ var clientId = '${Uuid().v1()}';
+ _eventSource = new EventSource('$serverUrl?sseClientId=$clientId',
+ withCredentials: true);
+ _serverUrl = '$serverUrl?sseClientId=$clientId';
+ _outgoingController.stream
+ .listen(_onOutgoingMessage, onDone: _onOutgoingDone);
+ _eventSource.addEventListener('message', _onIncomingMessage);
+ _eventSource.addEventListener('control', _onIncomingControlMessage);
+ _eventSource.onError.listen(_incomingController.addError);
+ }
+
+ Stream<Event> get onOpen => _eventSource.onOpen;
+
+ /// Add messages to this [StreamSink] to send them to the server.
+ ///
+ /// The message added to the sink has to be JSON encodable.
+ @override
+ StreamSink<String> get sink => _outgoingController.sink;
+
+ /// [Stream] of messages sent from the server to this client.
+ ///
+ /// A message is a decoded JSON object.
+ @override
+ Stream<String> get stream => _incomingController.stream;
+
+ void close() {
+ _eventSource.close();
+ _incomingController.close();
+ _outgoingController.close();
+ _client.close();
+ }
+
+ void _onIncomingControlMessage(Event message) {
+ var data = (message as MessageEvent).data;
+ if (data == 'close') {
+ close();
+ } else {
+ throw new UnsupportedError('Illegal Control Message "$data"');
+ }
+ }
+
+ void _onIncomingMessage(Event message) {
+ var decoded =
+ jsonDecode((message as MessageEvent).data as String) as String;
+ _incomingController.add(decoded);
+ }
+
+ void _onOutgoingDone() {
+ close();
+ }
+
+ void _onOutgoingMessage(dynamic message) async {
+ var encoded = jsonEncode(message);
+ try {
+ await _client.post(_serverUrl, body: encoded);
+ } catch (_) {
+ // Ignore any error
+ }
+ }
+}
diff --git a/lib/server/sse_handler.dart b/lib/server/sse_handler.dart
new file mode 100644
index 0000000..de13554
--- /dev/null
+++ b/lib/server/sse_handler.dart
@@ -0,0 +1,134 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:async/async.dart';
+import 'package:logging/logging.dart';
+import 'package:pedantic/pedantic.dart';
+import 'package:shelf/shelf.dart' as shelf;
+import 'package:stream_channel/stream_channel.dart';
+
+String _sseHeaders(String origin) => 'HTTP/1.1 200 OK\r\n'
+ 'Content-Type: text/event-stream\r\n'
+ 'Cache-Control: no-cache\r\n'
+ 'Connection: keep-alive\r\n'
+ 'Access-Control-Allow-Credentials: true\r\n'
+ 'Access-Control-Allow-Origin: $origin\r\n'
+ '\r\n';
+
+/// A bi-directional SSE connection between server and browser.
+class SseConnection extends StreamChannelMixin<String> {
+ final _incomingController = StreamController<String>();
+ final _outgoingController = StreamController<String>();
+ final _closeCompleter = Completer<Null>();
+ final Sink _sink;
+ final String _clientId;
+
+ SseConnection(this._sink, this._clientId) {
+ _outgoingController.stream.listen((data) {
+ if (!_closeCompleter.isCompleted) {
+ _sink.add('data: ${json.encode(data)}\n');
+ _sink.add('\n');
+ }
+ });
+ }
+
+ Future get onClose => _closeCompleter.future;
+
+ ///
+ /// The message added to the sink has to be JSON encodable.
+ @override
+ StreamSink<String> get sink => _outgoingController.sink;
+
+// Add messages to this [StreamSink] to send them to the server.
+ /// [Stream] of messages sent from the server to this client.
+ ///
+ /// A message is a decoded JSON object.
+ @override
+ Stream<String> get stream => _incomingController.stream;
+
+ void close() {
+ if (!_closeCompleter.isCompleted) _closeCompleter.complete();
+ }
+}
+
+/// [SseHandler] handles requests on a user defined path to create
+/// two-way communications of JSON encodable data between server and clients.
+///
+/// A server sends messages to a client through an SSE channel, while
+/// a client sends message to a server through HTTP POST requests.
+class SseHandler {
+ final _logger = Logger('SseHandler');
+ final Uri _uri;
+
+ final Set<SseConnection> _connections = Set<SseConnection>();
+
+ final _connectionController = StreamController<SseConnection>();
+
+ SseHandler(this._uri);
+
+ StreamQueue<SseConnection> get connections =>
+ StreamQueue(_connectionController.stream);
+
+ shelf.Handler get handler => _handle;
+
+ int get numberOfClients => _connections.length;
+
+ shelf.Response _createSseConnection(shelf.Request req, String path) {
+ req.hijack((channel) async {
+ var sink = utf8.encoder.startChunkedConversion(channel.sink);
+ sink.add(_sseHeaders(req.headers['origin']));
+ var clientId = req.url.queryParameters['sseClientId'];
+ var connection = SseConnection(sink, clientId);
+ _connections.add(connection);
+ unawaited(connection.onClose.then((_) {
+ _connections.remove(connection);
+ }));
+ channel.stream.listen((_) {
+ // SSE is unidirectional. Responses are handled through POST requests.
+ }, onDone: () {
+ connection.close();
+ });
+ _connectionController.add(connection);
+ });
+ return null;
+ }
+
+ String _getOriginalPath(shelf.Request req) => req.requestedUri.path;
+
+ Future<shelf.Response> _handle(shelf.Request req) async {
+ var path = _getOriginalPath(req);
+ if (_uri.path != path) {
+ return shelf.Response.notFound('');
+ }
+
+ if (req.headers['accept'] == 'text/event-stream' && req.method == 'GET') {
+ return _createSseConnection(req, path);
+ }
+
+ if (req.headers['accept'] != 'text/event-stream' && req.method == 'POST') {
+ return _handleIncomingMessage(req, path);
+ }
+
+ return shelf.Response.notFound('');
+ }
+
+ Future<shelf.Response> _handleIncomingMessage(
+ shelf.Request req, String path) async {
+ try {
+ var clientId = req.url.queryParameters['sseClientId'];
+ var message = await req.readAsString();
+ var jsonObject = json.decode(message) as String;
+ for (var connection in _connections) {
+ if (connection._clientId == clientId) {
+ connection._incomingController.add(jsonObject);
+ }
+ }
+ } catch (e, st) {
+ _logger.fine('Failed to handle incoming message. $e $st');
+ }
+ return shelf.Response.ok('', headers: {
+ 'access-control-allow-credentials': 'true',
+ 'access-control-allow-origin': req.headers['origin']
+ });
+ }
+}
diff --git a/pubspec.yaml b/pubspec.yaml
new file mode 100644
index 0000000..13c8db3
--- /dev/null
+++ b/pubspec.yaml
@@ -0,0 +1,25 @@
+name: sse
+version: 0.0.1
+author: Dart Team <misc@dartlang.org>
+homepage: https://github.com/dart-lang/sse
+description: >-
+ Provides client and server functionality for setting up bi-directional
+ communication through Server Sent Events (SSE) and corresponding POST
+ requests.
+
+environment:
+ sdk: ">=2.0.0-dev.64.1 <3.0.0"
+
+dependencies:
+ async: ^2.0.8
+ http: ^0.12.0+1
+ logging: ^0.11.3+2
+ pedantic: ^1.4.0
+ stream_channel: ^1.6.8
+ shelf: ^0.7.4
+ uuid: ^1.0.3
+
+dev_dependencies:
+ shelf_static: ^0.2.8
+ test: ^1.5.3
+ webdriver: ^2.0.0
diff --git a/test/sse_test.dart b/test/sse_test.dart
new file mode 100644
index 0000000..b598665
--- /dev/null
+++ b/test/sse_test.dart
@@ -0,0 +1,100 @@
+@TestOn('vm')
+import 'dart:async';
+import 'dart:io';
+
+import 'package:shelf/shelf.dart' as shelf;
+import 'package:shelf/shelf_io.dart' as io;
+import 'package:shelf_static/shelf_static.dart';
+import 'package:sse/server/sse_handler.dart';
+import 'package:test/test.dart';
+import 'package:webdriver/io.dart';
+
+void main() {
+ HttpServer server;
+ WebDriver webdriver;
+ SseHandler handler;
+
+ setUp(() async {
+ handler = SseHandler(Uri.parse('/test'));
+
+ var cascade = new shelf.Cascade()
+ .add(handler.handler)
+ .add(_faviconHandler)
+ .add(createStaticHandler('test/web',
+ listDirectories: true, defaultDocument: 'index.html'));
+
+ server = await io.serve(cascade.handler, 'localhost', 0);
+ webdriver = await createDriver();
+ });
+
+ tearDown(() async {
+ await webdriver.quit();
+ await server.close();
+ });
+
+ test('Can round trip messages', () async {
+ await webdriver.get('http://localhost:${server.port}');
+ var connection = await handler.connections.next;
+ connection.sink.add('blah');
+ expect(await connection.stream.first, 'blah');
+ });
+
+ test('Multiple clients can connect', () async {
+ var connections = await handler.connections;
+ await webdriver.get('http://localhost:${server.port}');
+ await connections.next;
+ await webdriver.get('http://localhost:${server.port}');
+ await connections.next;
+ });
+
+ test('Routes data correctly', () async {
+ var connections = await handler.connections;
+ await webdriver.get('http://localhost:${server.port}');
+ var connectionA = await connections.next;
+ await webdriver.get('http://localhost:${server.port}');
+ var connectionB = await connections.next;
+
+ connectionA.sink.add('foo');
+ connectionB.sink.add('bar');
+ await connectionA.onClose;
+ expect(await connectionB.stream.first, 'bar');
+ });
+
+ test('Can close from the server', () async {
+ expect(handler.numberOfClients, 0);
+ await webdriver.get('http://localhost:${server.port}');
+ var connection = await handler.connections.next;
+ expect(handler.numberOfClients, 1);
+ connection.close();
+ await connection.onClose;
+ expect(handler.numberOfClients, 0);
+ });
+
+ test('Can close from the client-side', () async {
+ expect(handler.numberOfClients, 0);
+ await webdriver.get('http://localhost:${server.port}');
+ var connection = await handler.connections.next;
+ expect(handler.numberOfClients, 1);
+
+ var closeButton = await webdriver.findElement(const By.tagName('button'));
+ await closeButton.click();
+
+ await connection.onClose;
+ expect(handler.numberOfClients, 0);
+ });
+
+ test('Disconnects when navigating away', () async {
+ await webdriver.get('http://localhost:${server.port}');
+ expect(handler.numberOfClients, 1);
+
+ await webdriver.get('chrome://version/');
+ expect(handler.numberOfClients, 0);
+ });
+}
+
+FutureOr<shelf.Response> _faviconHandler(shelf.Request request) {
+ if (request.url.path.endsWith('favicon.ico')) {
+ return new shelf.Response.ok('');
+ }
+ return new shelf.Response.notFound('');
+}
diff --git a/test/web/index.dart b/test/web/index.dart
new file mode 100644
index 0000000..dd949ca
--- /dev/null
+++ b/test/web/index.dart
@@ -0,0 +1,15 @@
+import 'dart:html';
+
+import 'package:sse/client/sse_client.dart';
+
+main() {
+ var channel = SseClient('/test');
+
+ document.querySelector('button').onClick.listen((_) {
+ channel.sink.close();
+ });
+
+ channel.stream.listen((s) {
+ channel.sink.add(s);
+ });
+}
diff --git a/test/web/index.dart.js b/test/web/index.dart.js
new file mode 100644
index 0000000..fd3064c
--- /dev/null
+++ b/test/web/index.dart.js
@@ -0,0 +1,6539 @@
+(function(){var supportsDirectProtoAccess=function(){var z=function(){}
+z.prototype={p:{}}
+var y=new z()
+if(!(y.__proto__&&y.__proto__.p===z.prototype.p))return false
+try{if(typeof navigator!="undefined"&&typeof navigator.userAgent=="string"&&navigator.userAgent.indexOf("Chrome/")>=0)return true
+if(typeof version=="function"&&version.length==0){var x=version()
+if(/^\d+\.\d+\.\d+\.\d+$/.test(x))return true}}catch(w){}return false}()
+function map(a){a=Object.create(null)
+a.x=0
+delete a.x
+return a}var A=map()
+var B=map()
+var C=map()
+var D=map()
+var E=map()
+var F=map()
+var G=map()
+var H=map()
+var J=map()
+var K=map()
+var L=map()
+var M=map()
+var N=map()
+var O=map()
+var P=map()
+var Q=map()
+var R=map()
+var S=map()
+var T=map()
+var U=map()
+var V=map()
+var W=map()
+var X=map()
+var Y=map()
+var Z=map()
+function I(){}init()
+function setupProgram(a,b,c){"use strict"
+function generateAccessor(b0,b1,b2){var g=b0.split("-")
+var f=g[0]
+var e=f.length
+var d=f.charCodeAt(e-1)
+var a0
+if(g.length>1)a0=true
+else a0=false
+d=d>=60&&d<=64?d-59:d>=123&&d<=126?d-117:d>=37&&d<=43?d-27:0
+if(d){var a1=d&3
+var a2=d>>2
+var a3=f=f.substring(0,e-1)
+var a4=f.indexOf(":")
+if(a4>0){a3=f.substring(0,a4)
+f=f.substring(a4+1)}if(a1){var a5=a1&2?"r":""
+var a6=a1&1?"this":"r"
+var a7="return "+a6+"."+f
+var a8=b2+".prototype.g"+a3+"="
+var a9="function("+a5+"){"+a7+"}"
+if(a0)b1.push(a8+"$reflectable("+a9+");\n")
+else b1.push(a8+a9+";\n")}if(a2){var a5=a2&2?"r,v":"v"
+var a6=a2&1?"this":"r"
+var a7=a6+"."+f+"=v"
+var a8=b2+".prototype.s"+a3+"="
+var a9="function("+a5+"){"+a7+"}"
+if(a0)b1.push(a8+"$reflectable("+a9+");\n")
+else b1.push(a8+a9+";\n")}}return f}function defineClass(a4,a5){var g=[]
+var f="function "+a4+"("
+var e="",d=""
+for(var a0=0;a0<a5.length;a0++){var a1=a5[a0]
+if(a1.charCodeAt(0)==48){a1=a1.substring(1)
+var a2=generateAccessor(a1,g,a4)
+d+="this."+a2+" = null;\n"}else{var a2=generateAccessor(a1,g,a4)
+var a3="p_"+a2
+f+=e
+e=", "
+f+=a3
+d+="this."+a2+" = "+a3+";\n"}}if(supportsDirectProtoAccess)d+="this."+"$deferredAction"+"();"
+f+=") {\n"+d+"}\n"
+f+=a4+".builtin$cls=\""+a4+"\";\n"
+f+="$desc=$collectedClasses."+a4+"[1];\n"
+f+=a4+".prototype = $desc;\n"
+if(typeof defineClass.name!="string")f+=a4+".name=\""+a4+"\";\n"
+f+=g.join("")
+return f}var z=supportsDirectProtoAccess?function(d,e){var g=d.prototype
+g.__proto__=e.prototype
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+function onLoad(b){for(var x=0;x<z.length;++x)z[x].removeEventListener("load",onLoad,false)
+a(b.target)}for(var y=0;y<z.length;++y)z[y].addEventListener("load",onLoad,false)})(function(a){init.currentScript=a
+if(typeof dartMainRunner==="function")dartMainRunner(E.eU,[])
+else E.eU([])})})()
+//# sourceMappingURL=index.dart.js.map
diff --git a/test/web/index.html b/test/web/index.html
new file mode 100644
index 0000000..be26763
--- /dev/null
+++ b/test/web/index.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+ <title>SSE Broadcast Channel Test</title>
+</head>
+
+<body>
+ <button type="button">Close Sink</button>
+ <script type="application/javascript" src="index.dart.js"></script>
+</body>
+
+</html>
diff --git a/tool/travis-setup.sh b/tool/travis-setup.sh
new file mode 100644
index 0000000..33c093d
--- /dev/null
+++ b/tool/travis-setup.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Copyright 2019 Google Inc. All Rights Reserved.
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Fast fail the script on failures.
+set -e
+
+pub get
diff --git a/tool/travis.sh b/tool/travis.sh
new file mode 100644
index 0000000..b9c9c9f
--- /dev/null
+++ b/tool/travis.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Copyright 2019 Google Inc. All Rights Reserved.
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+STATUS=0
+
+# Analyze package.
+dartanalyzer .
+ANALYSIS_STATUS=$?
+if [[ $ANALYSIS_STATUS -ne 0 ]]; then
+ STATUS=$ANALYSIS_STATUS
+fi
+
+# Start chromedriver.
+chromedriver --port=4444 --url-base=wd/hub &
+PIDC=$!
+
+# Run tests.
+pub run test -r expanded -p vm -j 1
+TEST_STATUS=$?
+if [[ $TEST_STATUS -ne 0 ]]; then
+ STATUS=$TEST_STATUS
+fi
+
+# Exit chromedriver and geckodriver.
+kill $PIDC
+
+exit $STATUS
