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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 XCTest
import Foundation
@testable import NIO
import NIOTestUtils
final class PipeChannelTest: XCTestCase {
var group: MultiThreadedEventLoopGroup! = nil
var channel: Channel! = nil
var toChannel: FileHandle! = nil
var fromChannel: FileHandle! = nil
var buffer: ByteBuffer! = nil
var eventLoop: SelectableEventLoop {
return self.group.next() as! SelectableEventLoop
}
override func setUp() {
self.group = .init(numberOfThreads: 1)
XCTAssertNoThrow(try withPipe { pipe1Read, pipe1Write in
try withPipe { pipe2Read, pipe2Write in
self.toChannel = try pipe1Write.withUnsafeFileDescriptor { fd in
FileHandle(fileDescriptor: fd, closeOnDealloc: false)
}
self.fromChannel = try pipe2Read.withUnsafeFileDescriptor { fd in
FileHandle(fileDescriptor: fd, closeOnDealloc: false)
}
try pipe1Read.withUnsafeFileDescriptor { channelIn in
try pipe2Write.withUnsafeFileDescriptor { channelOut in
let channel = NIOPipeBootstrap(group: self.group)
.withPipes(inputDescriptor: channelIn,
outputDescriptor: channelOut)
XCTAssertNoThrow(self.channel = try channel.wait())
}
}
for pipe in [pipe1Read, pipe1Write, pipe2Read, pipe2Write] {
XCTAssertNoThrow(try pipe.takeDescriptorOwnership())
}
return [] // we may leak the file handles because we take care of closing
}
return [] // we may leak the file handles because we take care of closing
})
self.buffer = self.channel.allocator.buffer(capacity: 128)
}
override func tearDown() {
self.buffer = nil
self.toChannel.closeFile()
self.fromChannel.closeFile()
self.toChannel = nil
self.fromChannel = nil
XCTAssertNoThrow(try self.channel.syncCloseAcceptingAlreadyClosed())
XCTAssertNoThrow(try self.group.syncShutdownGracefully())
}
func testBasicIO() throws {
class Handler: ChannelInboundHandler {
typealias InboundIn = ByteBuffer
func channelRead(context: ChannelHandlerContext, data: NIOAny) {
context.writeAndFlush(data).whenFailure { error in
XCTFail("unexpected error: \(error)")
}
}
}
XCTAssertTrue(self.channel.isActive)
XCTAssertNoThrow(try self.channel.pipeline.addHandler(Handler()).wait())
let longArray = Array(repeating: UInt8(ascii: "x"), count: 200_000)
for length in [1, 10_000, 100_000, 200_000] {
let fromChannel = self.fromChannel!
XCTAssertNoThrow(try self.toChannel.writeBytes(longArray[0 ..< length]))
let data = try? fromChannel.readBytes(ofExactLength: length)
XCTAssertEqual(Array(longArray[0 ..< length]), data)
}
XCTAssertNoThrow(try self.channel.close().wait())
}
func testWriteErrorsCloseChannel() {
XCTAssertNoThrow(try self.channel.setOption(ChannelOptions.allowRemoteHalfClosure, value: true).wait())
self.fromChannel.closeFile()
var buffer = self.channel.allocator.buffer(capacity: 1)
buffer.writeString("X")
XCTAssertThrowsError(try self.channel.writeAndFlush(buffer).wait()) { error in
if let error = error as? IOError {
XCTAssert([EPIPE, EBADF].contains(error.errnoCode), "unexpected errno: \(error)")
} else {
XCTFail("unexpected error: \(error)")
}
}
XCTAssertNoThrow(try self.channel.closeFuture.wait())
}
func testWeDontAcceptRegularFiles() throws {
try withPipe { pipeIn, pipeOut in
try withTemporaryFile { fileFH, path in
try fileFH.withUnsafeFileDescriptor { fileFHDescriptor in
try pipeIn.withUnsafeFileDescriptor { pipeInDescriptor in
try pipeOut.withUnsafeFileDescriptor { pipeOutDescriptor in
XCTAssertThrowsError(try NIOPipeBootstrap(group: self.group)
.withPipes(inputDescriptor: fileFHDescriptor,
outputDescriptor: pipeOutDescriptor).wait()) { error in
XCTAssertEqual(ChannelError.operationUnsupported, error as? ChannelError)
}
XCTAssertThrowsError(try NIOPipeBootstrap(group: self.group)
.withPipes(inputDescriptor: pipeInDescriptor,
outputDescriptor: fileFHDescriptor).wait()) { error in
XCTAssertEqual(ChannelError.operationUnsupported, error as? ChannelError)
}
}
}
}
}
return [pipeIn, pipeOut]
}
}
func testWeWorkFineWithASingleFileDescriptor() throws {
final class EchoHandler: ChannelInboundHandler {
typealias InboundIn = ByteBuffer
typealias OutboundOut = ByteBuffer
func channelRead(context: ChannelHandlerContext, data: NIOAny) {
context.writeAndFlush(data).whenFailure { error in
XCTFail("unexpected error: \(error)")
}
}
}
// We're using a socketpair here and not say a serial line because it's much harder to get a serial line :).
var socketPair: [CInt] = [-1, -1]
XCTAssertNoThrow(try socketPair.withUnsafeMutableBufferPointer { socketPairPtr in
precondition(socketPairPtr.count == 2)
try Posix.socketpair(domain: .local, type: .stream, protocol: 0, socketVector: socketPairPtr.baseAddress)
})
defer {
XCTAssertNoThrow(try socketPair.filter { $0 > 0 }.forEach(Posix.close(descriptor:)))
}
XCTAssertNoThrow(try "X".withCString { xPtr in
try Posix.write(descriptor: socketPair[1], pointer: xPtr, size: 1)
})
var maybeChannel: Channel? = nil
XCTAssertNoThrow(maybeChannel = try NIOPipeBootstrap(group: self.group)
.channelInitializer { channel in
channel.pipeline.addHandler(EchoHandler())
}
.withInputOutputDescriptor(dup(socketPair[0]))
.wait())
defer {
XCTAssertNoThrow(try maybeChannel?.close().wait())
}
var spaceForX: UInt8 = 0
XCTAssertNoThrow(try withUnsafeMutableBytes(of: &spaceForX) { xPtr in
try Posix.read(descriptor: socketPair[1], pointer: xPtr.baseAddress!, size: xPtr.count)
})
XCTAssertEqual(UInt8(ascii: "X"), spaceForX)
}
}
extension FileHandle {
func writeBytes(_ bytes: ByteBuffer) throws {
try self.writeBytes(Array(bytes.readableBytesView))
}
func writeBytes(_ bytes: ArraySlice<UInt8>) throws {
bytes.withUnsafeBytes {
self.write(Data(bytesNoCopy: .init(mutating: $0.baseAddress!), count: $0.count, deallocator: .none))
}
}
func writeBytes(_ bytes: [UInt8]) throws {
try self.writeBytes(bytes[...])
}
func readBytes(ofExactLength completeLength: Int) throws -> [UInt8] {
var buffer: [UInt8] = []
buffer.reserveCapacity(completeLength)
var remaining = completeLength
while remaining > 0 {
buffer.append(contentsOf: self.readData(ofLength: remaining))
remaining = completeLength - buffer.count
}
return buffer
}
}
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