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| 1 | +//===----------------------------------------------------------------------===// |
| 2 | +// |
| 3 | +// This source file is part of the SwiftNIO open source project |
| 4 | +// |
| 5 | +// Copyright (c) 2019 Apple Inc. and the SwiftNIO project authors |
| 6 | +// Licensed under Apache License v2.0 |
| 7 | +// |
| 8 | +// See LICENSE.txt for license information |
| 9 | +// See CONTRIBUTORS.txt for the list of SwiftNIO project authors |
| 10 | +// |
| 11 | +// SPDX-License-Identifier: Apache-2.0 |
| 12 | +// |
| 13 | +//===----------------------------------------------------------------------===// |
| 14 | + |
| 15 | +import NIO |
| 16 | +import NIOHPACK |
| 17 | +import NIOHTTP1 |
| 18 | +import NIOHTTP2 |
| 19 | + |
| 20 | +/// Have two `EmbeddedChannel` objects send and receive data from each other until |
| 21 | +/// they make no forward progress. |
| 22 | +func interactInMemory(_ first: EmbeddedChannel, _ second: EmbeddedChannel) throws { |
| 23 | + var operated: Bool |
| 24 | + |
| 25 | + func readBytesFromChannel(_ channel: EmbeddedChannel) throws -> ByteBuffer? { |
| 26 | + return try channel.readOutbound(as: ByteBuffer.self) |
| 27 | + } |
| 28 | + |
| 29 | + repeat { |
| 30 | + operated = false |
| 31 | + first.embeddedEventLoop.run() |
| 32 | + |
| 33 | + if let data = try readBytesFromChannel(first) { |
| 34 | + operated = true |
| 35 | + try second.writeInbound(data) |
| 36 | + } |
| 37 | + if let data = try readBytesFromChannel(second) { |
| 38 | + operated = true |
| 39 | + try first.writeInbound(data) |
| 40 | + } |
| 41 | + } while operated |
| 42 | +} |
| 43 | + |
| 44 | +final class ServerHandler: ChannelInboundHandler { |
| 45 | + typealias InboundIn = HTTP2Frame |
| 46 | + typealias OutboundOut = HTTP2Frame |
| 47 | + |
| 48 | + func channelRead(context: ChannelHandlerContext, data: NIOAny) { |
| 49 | + let data = self.unwrapInboundIn(data) |
| 50 | + switch data.payload { |
| 51 | + case .headers(let headers) where headers.endStream: |
| 52 | + break |
| 53 | + case .data(let data) where data.endStream: |
| 54 | + break |
| 55 | + default: |
| 56 | + // Ignore this frame |
| 57 | + return |
| 58 | + } |
| 59 | + |
| 60 | + // We got END_STREAM. Let's send a response. |
| 61 | + let headers = HPACKHeaders([(":status", "200")]) |
| 62 | + let responseFrame = HTTP2Frame(streamID: data.streamID, payload: .headers(.init(headers: headers, endStream: true))) |
| 63 | + context.writeAndFlush(self.wrapOutboundOut(responseFrame), promise: nil) |
| 64 | + } |
| 65 | +} |
| 66 | + |
| 67 | + |
| 68 | +final class ClientHandler: ChannelInboundHandler { |
| 69 | + typealias InboundIn = HTTP2Frame |
| 70 | + typealias OutboundOut = HTTP2Frame |
| 71 | + |
| 72 | + let streamID: HTTP2StreamID |
| 73 | + |
| 74 | + init(streamID: HTTP2StreamID) { |
| 75 | + self.streamID = streamID |
| 76 | + } |
| 77 | + |
| 78 | + func channelActive(context: ChannelHandlerContext) { |
| 79 | + // Send a request. |
| 80 | + let headers = HPACKHeaders([(":path", "/"), |
| 81 | + (":authority", "localhost"), |
| 82 | + (":method", "GET"), |
| 83 | + (":scheme", "https")]) |
| 84 | + let requestFrame = HTTP2Frame(streamID: self.streamID, payload: .headers(.init(headers: headers, endStream: true))) |
| 85 | + context.writeAndFlush(self.wrapOutboundOut(requestFrame), promise: nil) |
| 86 | + } |
| 87 | +} |
| 88 | + |
| 89 | +func run(identifier: String) { |
| 90 | + let loop = EmbeddedEventLoop() |
| 91 | + |
| 92 | + measure(identifier: identifier) { |
| 93 | + var sumOfStreamIDs = 0 |
| 94 | + |
| 95 | + for _ in 0..<1000 { |
| 96 | + let clientChannel = EmbeddedChannel(loop: loop) |
| 97 | + let serverChannel = EmbeddedChannel(loop: loop) |
| 98 | + |
| 99 | + let clientMultiplexer = try! clientChannel.configureHTTP2Pipeline(mode: .client).wait() |
| 100 | + _ = try! serverChannel.configureHTTP2Pipeline(mode: .server) { (channel, streamID) in |
| 101 | + return channel.pipeline.addHandler(ServerHandler()) |
| 102 | + }.wait() |
| 103 | + try! clientChannel.connect(to: SocketAddress(ipAddress: "1.2.3.4", port: 5678)).wait() |
| 104 | + try! serverChannel.connect(to: SocketAddress(ipAddress: "1.2.3.4", port: 5678)).wait() |
| 105 | + |
| 106 | + let promise = clientChannel.eventLoop.makePromise(of: Channel.self) |
| 107 | + clientMultiplexer.createStreamChannel(promise: promise) { (channel, streamID) in |
| 108 | + return channel.pipeline.addHandler(ClientHandler(streamID: streamID)) |
| 109 | + } |
| 110 | + clientChannel.embeddedEventLoop.run() |
| 111 | + let child = try! promise.futureResult.wait() |
| 112 | + let streamID = try! Int(child.getOption(HTTP2StreamChannelOptions.streamID).wait()) |
| 113 | + |
| 114 | + sumOfStreamIDs += streamID |
| 115 | + try! interactInMemory(clientChannel, serverChannel) |
| 116 | + try! child.closeFuture.wait() |
| 117 | + |
| 118 | + try! clientChannel.close().wait() |
| 119 | + try! serverChannel.close().wait() |
| 120 | + } |
| 121 | + |
| 122 | + return sumOfStreamIDs |
| 123 | + } |
| 124 | +} |
| 125 | + |
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