SwiftNIO HTTP/3

SwiftNIO HTTP/3 provides an implementation of the HTTP/3 protocol. You can use it with SwiftNIO QUIC and SwiftNIO to create HTTP/3 clients and servers.

Important

This package is still in active development and does not offer a stable API yet.

Quick Start

The following snippet contains a Swift Package manifest to use SwiftNIO HTTP/3 with SwiftNIO QUIC.

// swift-tools-version: 6.3
import PackageDescription

let package = Package(
    name: "Application",
    dependencies: [
        .package(url: "https://github.com/apple/swift-nio.git", from: "2.100.0"),
        .package(url: "https://github.com/apple/swift-nio-http3", branch: "main"),
        .package(url: "https://github.com/apple/swift-nio-quic", branch: "main"),
    ],
    targets: [
        .executableTarget(
            name: "H3Server",
            dependencies: [
                .product(name: "NIOQUIC", package: "swift-nio-quic"),
                .product(name: "NIOCore", package: "swift-nio"),
                .product(name: "NIOHTTP3", package: "swift-nio-http3"),
            ]
        )
    ]
)

Getting Started

Prerequisites

• Swift 6.3 and up
• macOS 26.0 and up or Linux (Ubuntu 22.04+)
• Xcode 26.0 and up (Apple platforms only)

Building and testing

To build via the command line (for all platforms), run at the root of the package:

swift build

To run all unit tests, run

swift test

Unit tests can also be run by filtering a specific class or function:

swift test --filter EncoderTests
swift test --filter EncoderTests.maxBlockedStreams