A Swift package for Server-Sent Events (SSE) with dual mode support: server side streaming for Vapor and client-side consumption for iOS/macOS/Linux.

• Shared types across server and client
• Native async/await API using Swift Concurrency
• Full SSE specification compliance
• Automatic reconnection with configurable strategies
• Linux compatible for Vapor deployments

dependencies: [
    .package(url: "https://github.com/squidypal/SwiftSSE.git", from: "1.0.0")
]

import SwiftSSEServer

app.get("events") { req -> EventStream in
    EventStream { writer in
        for i in 1...10 {
            try await writer.send(SSEEvent(data: "Event \(i)"))
            try await Task.sleep(for: .seconds(1))
        }
    }
}

import SwiftSSEClient

let client = SSEClient(url: URL(string: "https://api.example.com/events")!)

for try await event in client.events {
    print(event.data)
}

• SwiftSSECore: Linux, macOS, iOS
• SwiftSSEServer: Linux, macOS
• SwiftSSEClient: Linux, macOS, iOS

• Swift 6.0+
• macOS 12+ / iOS 15+
• Vapor 4+ (server module)

MIT