eventsource 0.1.0+2

  • Installing
  • Versions
  • 76


A library for using EventSource or Server-Sent Events (SSE). Both client and server functionality is provided.

This library implements the interface as described here.

Client usage

For more advanced usage, see the example/ directory. Creating a new EventSource client is as easy as a single call. The http package is used under the hood, so wherever this package works, this lbirary will also work. Browser usage is slightly different.

EventSource eventSource = await EventSource.connect("");
// in browsers, you need to pass a http.BrowserClient:
EventSource eventSource = await EventSource.connect("", 
    client: new http.BrowserClient());

Server usage

We recommend using shelf_eventsource for serving Server-Sent Events. This library provides an EventSourcePublisher that manages subscriptions, channels, encoding. We refer to documentation in the shelf_eventsource package for more information.

This library also includes a server provider for dart:io's HttpServer in io_server.dart. However, it has some issues with data flushing that are yet to be resolved, so we recommend using shelf instead.


This project is available under the MIT license, as can be found in the LICENSE file.


0.1.0 (2016-11-27)

  • Initial version

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  eventsource: "^0.1.0+2"

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter packages get

Alternatively, your editor might support pub get or flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

      import 'package:eventsource/eventsource.dart';
Version Uploaded Documentation Archive
0.1.0+2 Apr 25, 2017 Go to the documentation of eventsource 0.1.0+2 Download eventsource 0.1.0+2 archive
0.1.0+1 Nov 28, 2016 Go to the documentation of eventsource 0.1.0+1 Download eventsource 0.1.0+1 archive
0.1.0 Nov 27, 2016 Go to the documentation of eventsource 0.1.0 Download eventsource 0.1.0 archive


We analyzed this package on Jun 12, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.0.0-dev.60.0
  • pana: 0.11.3


Describes how popular the package is relative to other packages. [more]
63 / 100
Code health derived from static analysis. [more]
91 / 100
Reflects how tidy and up-to-date the package is. [more]
86 / 100
Overall score:
Weighted score of the above. [more]
Learn more about scoring.


Detected platforms: Flutter, web, other

No platform restriction found in primary library package:eventsource/eventsource.dart.


  • Fix analysis and formatting issues.

    Analysis or formatting checks reported 2 errors 5 hints.

    Strong-mode analysis of lib/publisher.dart failed with the following error:

    line: 109 col: 23
    The argument type 'ProxySink' can't be assigned to the parameter type 'Sink<Event>'.

    Strong-mode analysis of lib/src/decoder.dart failed with the following error:

    line: 10 col: 7
    Missing concrete implementations of 'StreamTransformer.cast' and 'StreamTransformer.retype'.

    Similar analysis of the following files failed:

    • lib/eventsource.dart (hint)
    • lib/src/encoder.dart (hint)
  • Fix .analysis_options.

    We were unable to parse .analysis_options.

  • Package is getting outdated.

    The package was released 59 weeks ago.

  • The description is too short.

    Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

  • Package is pre-v1 release.

    While there is nothing inherently wrong with versions of 0.*.*, it usually means that the author is still experimenting with the general direction API.

  • Maintain an example.

    None of the files in your example/ directory matches a known example patterns. Common file name patterns include: main.dart, example.dart or you could also use eventsource.dart.

  • Use analysis_options.yaml.

    Rename old .analysis_options file to analysis_options.yaml.

  • Enable strong mode analysis.

    Strong mode helps you to detect bugs and potential issues earlier.Start your analysis_options.yaml file with the following:

      strong-mode: true


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.0.0 <2.0.0
collection >=1.4.1 <2.0.0 1.14.10
http >=0.11.0 <0.12.0 0.11.3+16
http_parser >=2.2.0 <4.0.0 3.1.2
logging >=0.11.0 <0.12.0 0.11.3+1
sync >=0.1.0 <0.2.0 0.1.0+1
Transitive dependencies
async 2.0.7
charcode 1.1.1
path 1.6.0
source_span 1.4.0
string_scanner 1.0.2
typed_data 1.1.5
Dev dependencies
test >=0.12.0 <0.13.0