在网络方面,DNS代理是iOS 11的最大功能之一.但是它们没有提供太多关于它的文档或示例.它上面还有一个
talk,它们刚刚给出了DNS代理可能的描述.
我想创建一个可行的样本但直到现在才取得成功.因此,我创建了具有DNS代理权利的网络扩展,并添加了DNS代理提供程序.这是代码：
class DNSProxyProvider: NEDNSProxyProvider {
let defaults = UserDefaults(suiteName: "group.com.securly.dnsProxy")
override init() {
NSLog("QNEDNSProxy.Provider: init")
super.init()
// +++ might want to set up KVO on `systemDNSSettings`
}
override func startProxy(options:[String: Any]? = nil,completionHandler: @escaping (Error?) -> Void) {
NSLog("QNEDNSProxy.Provider: start")
// self.defaults?.set("DidStart",forKey: "DidStart")
completionHandler(nil)
}
override func stopProxy(with reason: NEProviderStopReason,completionHandler: @escaping () -> Void) {
NSLog("QNEDNSProxy.Provider: stop")
completionHandler()
}
override func handleNewFlow(_ flow: NEAppProxyFlow) -> Bool {
NSLog("QNEDNSProxy.Provider: new flow (denied)")
// self.defaults?.set("DidHandleNewFlow",forKey: "DidHandleNewFlow")
return true
}
}
然后在AppDelegate中,我声明一个NEDNSProxyManager并将其用作：
class AppDelegate: UIResponder,UIApplicationDelegate {
var window: UIWindow?
let manager = NEDNSProxyManager.shared()
func application(_ application: UIApplication,didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
self.enable()
return true
}
private func enable() {
self.update {
self.manager.localizedDescription = "DNSProxySample"
let proto = NEDNSProxyProviderProtocol()
// proto.providerConfiguration = +++
proto.providerBundleIdentifier = "com.securly.dnsProxy"
self.manager.providerProtocol = proto
self.manager.isEnabled = true
}
}
private func disable() {
self.update {
self.manager.isEnabled = false
}
}
private func update(_ body: @escaping () -> Void) {
self.manager.loadFromPreferences { (error) in
guard error == nil else {
NSLog("DNSProxySample.App: load error")
return
}
body()
self.manager.saveToPreferences { (error) in
guard error == nil else {
NSLog("DNSProxySample.App: save error")
return
}
NSLog("DNSProxySample.App: saved")
}
}
}
}
疑问/问题：
解决方法
我设法通过系统触发DNSProxyProvider上的startProxy和handleFlow.我的配置是这样的：
>应用目标上的权利
> DNSProxy扩展的权利
红线类似于：group.com.xzy.project_name
> Extension上的Info.plist文件
> AppDelegate
import UIKit
import NetworkExtension
@UIApplicationMain
class AppDelegate: UIResponder,didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
self.enable()
return true
}
private func enable() {
self.update {
self.manager.localizedDescription = "DNS"
let proto = NEDNSProxyProviderProtocol()
proto.providerBundleIdentifier = "EXTENSION_BUNDLE_IDENTIFIER_WHICH_HAS_DNS_PROXY"
self.manager.providerProtocol = proto
self.manager.isEnabled = true
}
}
private func disable() {
self.update {
self.manager.isEnabled = false
}
}
private func update(_ body: @escaping () -> Void) {
self.manager.loadFromPreferences { (error) in
guard error == nil else {
NSLog("DNS Test App: load error")
return
}
body()
self.manager.saveToPreferences { (error) in
guard error == nil else {
NSLog("DNS Test App: save error")
return
}
NSLog("DNS Test App: saved")
}
}
}
}
请勿忘记在此处更改BUNDLE IDENTIFIER proto.providerBundleIdentifier =“EXTENSION_BUNDLE_IDENTIFIER_WHICH_HAS_DNS_PROXY”
> DNSProxyProvider
import NetworkExtension
class DNSProxyProvider: NEDNSProxyProvider {
override init() {
NSLog("DNSProxyProvider: init")
super.init()
}
override func startProxy(options:[String: Any]? = nil,completionHandler: @escaping (Error?) -> Void) {
NSLog("DNSProxyProvider: startProxy")
completionHandler(nil)
}
override func stopProxy(with reason: NEProviderStopReason,completionHandler: @escaping () -> Void) {
NSLog("DNSProxyProvider: stopProxy")
completionHandler()
}
override func sleep(completionHandler: @escaping () -> Void) {
NSLog("DNSProxyProvider: sleep")
completionHandler()
}
override func wake() {
NSLog("DNSProxyProvider: wake")
}
override func handleNewFlow(_ flow: NEAppProxyFlow) -> Bool {
NSLog("DNSProxyProvider: handleFlow")
return false
}
}
>作为最后一步,在真正的iOS设备上运行应用程序.>如果要显示扩展日志,请从Mac打开Console.app.>要调试扩展名：应从运行菜单中选择主应用程序.从Xcode的Debug菜单中选择Attach to Process by PID或Name …然后输入扩展名,按Attach按钮.在XYZ的iPhone上看到等待附加到EXTENSION_NAME后.在iOS设备上运行您的应用目标.
