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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#if os(OSX) || os(iOS) || os(watchOS) || os(tvOS)
import Darwin
#elseif os(Linux) || os(FreeBSD) || os(PS4) || os(Android)
import Glibc
import Dispatch
#endif
import Foundation
import CoreFoundation
public let TSocketServerClientConnectionFinished = "TSocketServerClientConnectionFinished"
public let TSocketServerProcessorKey = "TSocketServerProcessor"
public let TSocketServerTransportKey = "TSocketServerTransport"
open class TSocketServer<InProtocol: TProtocol, OutProtocol: TProtocol, Processor: TProcessor> {
var socketFileHandle: FileHandle
var processingQueue = DispatchQueue(label: "TSocketServer.processing",
qos: .background,
attributes: .concurrent)
let processor: Processor
public init(port: Int,
inProtocol: InProtocol.Type,
outProtocol: OutProtocol.Type,
processor: Processor) throws {
self.processor = processor
// create a socket
var fd: Int32 = -1
#if os(Linux)
let sock = CFSocketCreate(kCFAllocatorDefault, PF_INET, Int32(SOCK_STREAM.rawValue), Int32(IPPROTO_TCP), 0, nil, nil)
#else
let sock = CFSocketCreate(kCFAllocatorDefault, PF_INET, SOCK_STREAM, IPPROTO_TCP, 0, nil, nil)
#endif
if sock != nil {
CFSocketSetSocketFlags(sock, CFSocketGetSocketFlags(sock) & ~CFOptionFlags(kCFSocketCloseOnInvalidate))
fd = CFSocketGetNative(sock)
var yes = 1
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, UInt32(MemoryLayout<Int>.size))
let inPort = in_port_t(UInt16(truncatingIfNeeded: port).bigEndian)
#if os(Linux)
var addr = sockaddr_in(sin_family: sa_family_t(AF_INET),
sin_port: inPort,
sin_addr: in_addr(s_addr: in_addr_t(0)),
sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
#else
var addr = sockaddr_in(sin_len: UInt8(MemoryLayout<sockaddr_in>.size),
sin_family: sa_family_t(AF_INET),
sin_port: inPort,
sin_addr: in_addr(s_addr: in_addr_t(0)),
sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
#endif
let ptr = withUnsafePointer(to: &addr) {
return UnsafePointer<UInt8>(OpaquePointer($0))
}
let address = Data(bytes: ptr, count: MemoryLayout<sockaddr_in>.size)
let cfaddr = address.withUnsafeBytes {
CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, $0.bindMemory(to: UInt8.self).baseAddress!, address.count, kCFAllocatorNull)
}
if CFSocketSetAddress(sock, cfaddr) != CFSocketError.success { //kCFSocketSuccess {
CFSocketInvalidate(sock)
print("TSocketServer: Could not bind to address")
throw TTransportError(error: .notOpen, message: "Could not bind to address")
}
} else {
print("TSocketServer: No server socket")
throw TTransportError(error: .notOpen, message: "Could not create socket")
}
// wrap it in a file handle so we can get messages from it
socketFileHandle = FileHandle(fileDescriptor: fd, closeOnDealloc: true)
// throw away our socket
CFSocketInvalidate(sock)
print("TSocketServer: Listening on TCP port \(port)")
// tell socket to listen
acceptConnectionInBackgroundAndNotify(handle: socketFileHandle)
}
public init(path: String,
inProtocol: InProtocol.Type,
outProtocol: OutProtocol.Type,
processor: Processor) throws {
self.processor = processor
// create a socket
let socket = UnixSocket(path: path)
let fd = socket.fd
if fd == -1 {
print("TSocketServer: No server socket")
throw TTransportError(error: .notOpen, message: "Could not create socket")
}
// wrap it in a file handle so we can get messages from it
socketFileHandle = FileHandle(fileDescriptor: fd, closeOnDealloc: true)
// register for notifications of accepted incoming connections
_ = NotificationCenter.default.addObserver(forName: .NSFileHandleConnectionAccepted,
object: nil, queue: nil) {
[weak self] notification in
guard let strongSelf = self else { return }
guard let clientSocket = notification.userInfo?[NSFileHandleNotificationFileHandleItem] as? FileHandle else { return }
strongSelf.connectionAccepted(clientSocket)
}
let bindRes = socket.bind()
guard bindRes == 0 else {
print("TServerSocket: bind failed")
throw TTransportError(error: .notOpen, message: "Could not create socket")
}
let listenRes = listen(fd, 1024)
guard listenRes == 0 else {
print("TServerSocket: listen failed")
throw TTransportError(error: .notOpen, message: "Could not create socket")
}
// tell socket to listen
acceptConnectionInBackgroundAndNotify(handle: socketFileHandle)
print("TSocketServer: Listening on unix path \(path)")
}
private func acceptConnectionInBackgroundAndNotify(handle: FileHandle) {
DispatchQueue(label: "TSocketServer.connectionAccept").async {
let acceptedFD = accept(handle.fileDescriptor, nil, nil)
DispatchQueue.main.async {
self.connectionAccepted(FileHandle(fileDescriptor: acceptedFD))
}
}
}
func connectionAccepted(_ clientSocket: FileHandle) {
// Now that we have a client connected, handle the request on queue
processingQueue.async {
self.handleClientConnection(clientSocket)
}
// continue accepting connections
acceptConnectionInBackgroundAndNotify(handle: socketFileHandle)
}
open func createTransport(fileHandle: FileHandle) -> TTransport {
return TFileHandleTransport(fileHandle: fileHandle)
}
func handleClientConnection(_ clientSocket: FileHandle) {
let transport = createTransport(fileHandle: clientSocket)
let inProtocol = InProtocol(on: transport)
let outProtocol = OutProtocol(on: transport)
do {
while true {
try processor.process(on: inProtocol, outProtocol: outProtocol)
}
} catch let error {
print("Error processing request: \(error)")
}
DispatchQueue.main.async {
NotificationCenter.default
.post(name: Notification.Name(rawValue: TSocketServerClientConnectionFinished),
object: nil,
userInfo: [TSocketServerProcessorKey: self.processor,
TSocketServerTransportKey: transport])
}
}
}
public class TFramedSocketServer<InProtocol: TProtocol, OutProtocol: TProtocol, Processor: TProcessor>: TSocketServer<InProtocol, OutProtocol, Processor> {
open override func createTransport(fileHandle: FileHandle) -> TTransport {
return TFramedTransport(transport: super.createTransport(fileHandle: fileHandle))
}
}
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