mirror of
https://github.com/apple/container.git
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96 lines
3.6 KiB
Swift
96 lines
3.6 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2026 Apple Inc. and the container project authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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import NIOCore
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import NIOHTTP1
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import NIOPosix
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/// Minimal loopback-only HTTP/1.1 server that serves a single fixed byte
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/// payload for any GET request. Used by integration tests that need to
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/// exercise a "fetch this over a URL" code path without depending on a real
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/// network peer.
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final class LoopbackFileServer: Sendable {
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/// URL clients should fetch to receive the served payload.
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let url: URL
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private let group: MultiThreadedEventLoopGroup
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private let channel: any Channel
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init(serving data: Data) throws {
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let group = MultiThreadedEventLoopGroup(numberOfThreads: 1)
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let bootstrap = ServerBootstrap(group: group)
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.childChannelInitializer { channel in
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channel.pipeline.configureHTTPServerPipeline().flatMap {
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channel.pipeline.addHandler(StaticPayloadHandler(data: data))
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}
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}
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let channel: any Channel
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do {
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channel = try bootstrap.bind(host: "127.0.0.1", port: 0).wait()
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} catch {
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try? group.syncShutdownGracefully()
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throw error
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}
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guard let port = channel.localAddress?.port else {
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try? channel.close().wait()
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try? group.syncShutdownGracefully()
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throw CommandError.executionFailed("loopback file server has no bound port")
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}
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self.group = group
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self.channel = channel
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self.url = URL(string: "http://127.0.0.1:\(port)/payload")!
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}
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/// Stops accepting connections and shuts down the server's event loop.
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func shutdown() {
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try? channel.close().wait()
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try? group.syncShutdownGracefully()
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}
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}
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/// Responds to any request with the fixed payload, then closes the connection.
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private final class StaticPayloadHandler: ChannelInboundHandler, Sendable {
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typealias InboundIn = HTTPServerRequestPart
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typealias OutboundOut = HTTPServerResponsePart
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private let data: Data
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init(data: Data) {
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self.data = data
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}
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func channelRead(context: ChannelHandlerContext, data: NIOAny) {
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guard case .end = self.unwrapInboundIn(data) else { return }
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var headers = HTTPHeaders()
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headers.add(name: "Content-Length", value: "\(self.data.count)")
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headers.add(name: "Connection", value: "close")
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context.write(self.wrapOutboundOut(.head(HTTPResponseHead(version: .http1_1, status: .ok, headers: headers))), promise: nil)
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var buffer = context.channel.allocator.buffer(capacity: self.data.count)
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buffer.writeBytes(self.data)
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context.write(self.wrapOutboundOut(.body(.byteBuffer(buffer))), promise: nil)
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let loopBoundContext = NIOLoopBound(context, eventLoop: context.eventLoop)
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context.writeAndFlush(self.wrapOutboundOut(.end(nil))).whenComplete { _ in
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loopBoundContext.value.close(promise: nil)
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}
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}
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}
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