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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftNIO open source project
//
// Copyright (c) 2017-2018 Apple Inc. and the SwiftNIO project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import NIO
private final class ChatHandler: ChannelInboundHandler {
public typealias InboundIn = ByteBuffer
public typealias OutboundOut = ByteBuffer
private func printByte(_ byte: UInt8) {
#if os(Android)
print(Character(UnicodeScalar(byte)), terminator:"")
#else
fputc(Int32(byte), stdout)
#endif
}
public func channelRead(context: ChannelHandlerContext, data: NIOAny) {
var buffer = self.unwrapInboundIn(data)
while let byte: UInt8 = buffer.readInteger() {
printByte(byte)
}
}
public func errorCaught(context: ChannelHandlerContext, error: Error) {
print("error: ", error)
// As we are not really interested getting notified on success or failure we just pass nil as promise to
// reduce allocations.
context.close(promise: nil)
}
}
let group = MultiThreadedEventLoopGroup(numberOfThreads: 1)
let bootstrap = ClientBootstrap(group: group)
// Enable SO_REUSEADDR.
.channelOption(ChannelOptions.socketOption(.so_reuseaddr), value: 1)
.channelInitializer { channel in
channel.pipeline.addHandler(ChatHandler())
}
defer {
try! group.syncShutdownGracefully()
}
// First argument is the program path
let arguments = CommandLine.arguments
let arg1 = arguments.dropFirst().first
let arg2 = arguments.dropFirst(2).first
let defaultHost = "::1"
let defaultPort = 9999
enum ConnectTo {
case ip(host: String, port: Int)
case unixDomainSocket(path: String)
}
let connectTarget: ConnectTo
switch (arg1, arg1.flatMap(Int.init), arg2.flatMap(Int.init)) {
case (.some(let h), _ , .some(let p)):
/* we got two arguments, let's interpret that as host and port */
connectTarget = .ip(host: h, port: p)
case (.some(let portString), .none, _):
/* couldn't parse as number, expecting unix domain socket path */
connectTarget = .unixDomainSocket(path: portString)
case (_, .some(let p), _):
/* only one argument --> port */
connectTarget = .ip(host: defaultHost, port: p)
default:
connectTarget = .ip(host: defaultHost, port: defaultPort)
}
let channel = try { () -> Channel in
switch connectTarget {
case .ip(let host, let port):
return try bootstrap.connect(host: host, port: port).wait()
case .unixDomainSocket(let path):
return try bootstrap.connect(unixDomainSocketPath: path).wait()
}
}()
print("ChatClient connected to ChatServer: \(channel.remoteAddress!), happy chatting\n. Press ^D to exit.")
while let line = readLine(strippingNewline: false) {
let buffer = channel.allocator.buffer(string: line)
try! channel.writeAndFlush(buffer).wait()
}
// EOF, close connect
try! channel.close().wait()
print("ChatClient closed")
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