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launchdarkly/swift-eventsource 3.1.1
Server-sent events (SSE) client implementation in Swift for iOS, macOS, tvOS, and watchOS
⭐️ 120
🕓 24 weeks ago
iOS macOS watchOS tvOS linux macOS iOS
.package(url: "https://github.com/launchdarkly/swift-eventsource.git", from: "3.1.1")


CircleCI CocoaPods Carthage compatible SwiftPM compatible Platform

LDSwiftEventSource is a cross platform implementation of the EventSource specification written in Swift. It was developed for use in the LaunchDarkly iOS SDK. Generated API docs are available on GitHub Pages.


  • iOS 11.0+ / watchOS 4.0+ / tvOS 11.0+ / macOS 10.13+
  • Swift 5.1+



To use the CocoaPods dependency manager to integrate LDSwiftEventSource into your Xcode project, specify it in your Podfile:

pod 'LDSwiftEventSource', '~> 3.1'


To use the Carthage dependency manager to integrate LDSwiftEventSource into your Xcode project, specify it in your Cartfile:

github "LaunchDarkly/swift-eventsource" ~> 3.1

Swift Package Manager

The Swift Package Manager is a dependency manager integrated into the swift compiler and Xcode. Note that the LDSwiftEventSource Swift package provides both a LDSwiftEventSource product, which is explicitly dynamic, and a LDSwiftEventSourceStatic product which is explicitly static.

To integrate LDSwiftEventSource into an Xcode project, go to the project editor, and select Swift Packages. From here hit the + button and follow the prompts using https://github.com/LaunchDarkly/swift-eventsource.git as the URL.

To include LDSwiftEventSource in a Swift package, simply add it to the dependencies section of your Package.swift file. And add the desired product as a dependency for your targets.

dependencies: [
    .package(url: "https://github.com/LaunchDarkly/swift-eventsource.git", .upToNextMajor(from: "3.1.1"))


We encourage pull requests and other contributions from the community. Check out our contributing guidelines for instructions on how to contribute to this SDK.

About LaunchDarkly

  • LaunchDarkly is a continuous delivery platform that provides feature flags as a service and allows developers to iterate quickly and safely. We allow you to easily flag your features and manage them from the LaunchDarkly dashboard. With LaunchDarkly, you can:
    • Roll out a new feature to a subset of your users (like a group of users who opt-in to a beta tester group), gathering feedback and bug reports from real-world use cases.
    • Gradually roll out a feature to an increasing percentage of users, and track the effect that the feature has on key metrics (for instance, how likely is a user to complete a purchase if they have feature A versus feature B?).
    • Turn off a feature that you realize is causing performance problems in production, without needing to re-deploy, or even restart the application with a changed configuration file.
    • Grant access to certain features based on user attributes, like payment plan (eg: users on the ‘gold’ plan get access to more features than users in the ‘silver’ plan). Disable parts of your application to facilitate maintenance, without taking everything offline.
  • LaunchDarkly provides feature flag SDKs for a wide variety of languages and technologies. Check out our documentation for a complete list.
  • Explore LaunchDarkly


Stars: 120
Last commit: 5 weeks ago
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Release Notes

[3.1.1] - 2023-06-12
24 weeks ago


  • Per the SSE spec, an HTTP 204 will now halt retry attempts by default.

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