添加的網站沒有被內容攔截器阻止

Question

嗨我正在寫一個簡單的內容攔截器應用程序。在這個應用程序中，我想允許用戶添加他想阻止並阻止的網站，但由於某些原因，我的內容阻止程序並未阻止新加入的網站。我使用SFContentBlockerManager.reloadContentBlocker（withIdentifier：blockerIdentifier）它打印成功，但由於某些原因它不起作用。

import UIKit 
import Cartography 
import SwiftyJSON 
import SafariServices 

protocol MyProtocol{ 
    func DeleteSite(num:Int) 
} 


class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, MyProtocol { 
var tableView: UITableView = UITableView() 
var arr = [String]() 
func DeleteSite(num: Int) { 

    if let path = Bundle.main.path(forResource: "blockerList", ofType: "json"){ 
     guard let data = NSData(contentsOf: URL(fileURLWithPath: path)) else{ 
      return 
     } 
    //  JSON(data: data as Data)[num] = nil 
     var jsonObj = JSON(data: data as Data) 
    // jsonObj.arrayObject?.remove(at: num) 
     print(jsonObj) 
     if jsonObj != JSON.null { 
      // jsonObj.arrayObject[num] = 
      jsonObj[num] = nil 
      // print("Hello I do work here \(jsonObj.arrayValue.remove(at: num))") 
      tableView.reloadData() 
      // jsonObj.arrayObject?.remove(at: num) 

     } else { 
      print("Could not get json from file, make sure that file contains valid json.") 
     } 
    } 

} 


override func viewDidLoad() { 
    super.viewDidLoad() 
    let blockerIdentifier = "saltaim.SelfControl2.blocker" 
    SFContentBlockerManager.reloadContentBlocker(withIdentifier: blockerIdentifier) {error in 
     if error == nil { 
      print("Success") 
     } else { 
      print("----------------------------------------------") 
      print(error) 
      print("----------------------------------------------") 

     } 
    } 

    super.view.backgroundColor = UIColor.red; 

    //let blockerIdentifier = "com.appsfoundation.ContentBlocker.Blocker" 
    //SFContentBlockerManager. 
    // print("--------------------") 
    //print(FileManager.default.c) 
    //Bundle(for: ContentBlockerRequestHandler) 
    //print(Bundle.main.path(forResource: "blocker/blockerList", ofType: "json")) 
    //print(Bundle.main.path(forResource: "blockerList", ofType: "json")) 

    //print("--------------------") 
    //Bundle.main.url 
    //Bundle.main.pa 
    //FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: <#T##String#>) 
    // print(Bundle.main.url(forResource: "blocker/blockerList", withExtension: "json")) 
    // Bundle.init(for: ContentBlockerRequestHandler) 
    // print(Bundle.main.paths(forResourcesOfType: "blockerList.json", inDirectory: "blocker")) 
    tableView.register(MyTableViewCell.self, forCellReuseIdentifier: "cell") 

    if let path = Bundle.main.path(forResource: "blockerList", ofType: "json"){ 
     guard let data = NSData(contentsOf: URL(fileURLWithPath: path)) else{ 
      return 
     } 
     let jsonObj = JSON(data: data as Data) 
     print(jsonObj) 
     if jsonObj != JSON.null { 
      // print("Hello I do work here \(jsonObj["trigger"])") 
      guard let arr1 = jsonObj.array else{ 
       return; 
      } 
      var count = arr1.count; 
      for index in 0...count-1{ 
       //print("-------") 
       // print(jsonObj[index]["trigger"]["url-filter"].stringValue) 
       arr.append(jsonObj[index]["trigger"]["url-filter"].stringValue); 


      } 
      //for 

     } else { 
      print("Could not get json from file, make sure that file contains valid json.") 
     } 
     // 


    } 
    // arr.append("Hello") 
    // arr.append("my name is ") 
    let button = UIButton(); 
    button.setTitle("+", for: .normal) 
    button.addTarget(self, action: #selector(buttonPressed), for: .touchUpInside) 
    // button.titleLabel?.text = "+" 

    self.view.addSubview(tableView) 
    self.view.addSubview(button) 
    tableView.delegate = self 
    tableView.dataSource = self 
    constrain(tableView, view, button){ 
     tableView, view, button in 
     tableView.width == view.width 
     tableView.height == view.height - 50 
     tableView.top == view.top 
     tableView.right == view.right 
     button.height == 50 
     button.width == view.width 
     button.top == view.bottom - 50 
     button.right == view.right 

    } 
    //arr = Array() 
    // Do any additional setup after loading the view, typically from a nib. 
    // self.view.backgroundColor = UIColor.redColor(); 
} 
func buttonPressed(){ 
    // print("I was pressed") 
    //var alert = UIAlertView(); 
    //alert.title = "Enter a website"; 
    // alert.alertViewStyle = UIAlertViewStyle.plainTextInput 
    // alert.addB 
    //alert.addButton(withTitle: "Done") 
    //alert.addButton(withTitle: "Cancel") 
    var s:String? 
    var alert = UIAlertController(title: "Alert", message: "Enter website that you would like to block", preferredStyle: UIAlertControllerStyle.alert) 

    alert.addTextField { (text) in 
     text.placeholder = "http://"; 
     s=text.text 
    } 
    let action = UIAlertAction(title: "Done", style: UIAlertActionStyle.default) { (action: UIAlertAction) in 
     guard let s = alert.textFields?[0].text else{ 
      return 
     } 

     //var c = ["action":["type": "block"], "trigger":["url-filter":s]]; 
     //print(c) 
     let path = Bundle.main.path(forResource: "blockerList", ofType: "json")! 
     var readString = "" // Used to store the file contents 
     do { 
      // Read the file contents 
      readString = try String.init(contentsOf: URL(fileURLWithPath: path)) 
      //readString = fileURL.absoluteString 
      // readString = try String(contentsOfURL: fileURL) 
     } catch let error as NSError { 
      print("Failed reading from URL: \(URL(fileURLWithPath: path)), Error: " + error.localizedDescription) 
     } 
     // var size = (readString.characters.count - 1) 
     //print("The end index is \(readString.endIndex)") 
     print("------------------------") 
     readString = readString.replacingOccurrences(of: "]", with: "") 
     // print(readString.endIndex) 
     // readString = String(readString.characters.dropLast()) 
     print(readString) 
     print("--------------------------") 
     // readString.remove(at: readString.endIndex) 
     // readString = readString.substring(to: readString.index(before: readString.endIndex)) 
     readString += ",{\"action\":{\"type\":\"block\"},\"trigger\":{\"url-filter\":\"" + s+"\"}}]" 
     print("File Text: \(readString)") 
    //  let fileName = "blockerList" 
     // let DocumentDirURL = try! FileManager.default.url(for: ., in: .userDomainMask, appropriateFor: nil, create: true) 
    // let fileURL = DocumentDirURL.appendingPathComponent(fileName).appendingPathExtension("json") 
     print("FilePath: \(path)") 
     let fileHandler = try! FileHandle(forWritingTo: URL(fileURLWithPath: path)) 
     //fileHandler. 
     //fileHandler.seekToEndOfFile() 
     fileHandler.write(readString.data(using: String.Encoding.utf8, allowLossyConversion: false)!) 

     // fileHandler.write("Hello".data(using: String.Encoding.utf8, allowLossyConversion: false)!) 
     // fileHandler.write(c.description.data(using: String.Encoding.utf8, allowLossyConversion: false)!) 
     fileHandler.closeFile() 
     var readString1 = "" // Used to store the file contents 
     do { 
      // Read the file contents 
      readString1 = try String.init(contentsOf: URL(fileURLWithPath: path)) 
      //readString = fileURL.absoluteString 
      // readString = try String(contentsOfURL: fileURL) 
     } catch let error as NSError { 
      print("Failed reading from URL: \(URL(fileURLWithPath: path)), Error: " + error.localizedDescription) 
     } 
     print("File Text: \(readString1)") 
     let blockerIdentifier = "saltaim.SelfControl2.blocker" 
     SFContentBlockerManager.reloadContentBlocker(withIdentifier: blockerIdentifier) {error in 
      if error == nil { 
       print("Success") 
      } else { 
       print("----------------------------------------------") 
       print(error) 
       print("----------------------------------------------") 

      } 
     } 



    } 
    let action2 = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel) { (UIAlertAction) in 
     self.dismiss(animated: true, completion: nil) 
    } 
    alert.addAction(action) 
    alert.addAction(action2) 
    self.present(alert, animated: true, completion: nil) 
    //self.viewC 
    //presentedViewController(alert) 
    //alert.addA 
    // alert.show() 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 

    // Dispose of any resources that can be recreated. 
} 
func numberOfSections(in tableView: UITableView) -> Int { 
    return 1 
} 
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
{ 
    return arr.count 

} 

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat 
{ 
    return 50 
} 

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
{ 
    // Code here 
    // let cell = UITableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "cell") 
    var site = arr[(indexPath as NSIndexPath).item] 
    let cell = MyTableViewCell(num: (indexPath as NSIndexPath).item,site: site, style: UITableViewCellStyle.default, reuseIdentifier: "cell") 
    cell.delegate = self; 
    // let cell = MyTableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "cell") 
    // cell.site = arr[(indexPath as NSIndexPath).item] 

    // let cell1 = MyTableViewCell(); 

    // let cell = MyTableV 
    //cell.t 
    //let cell1 = tableView.dequeueReusableCell(withIdentifier: "cell") 
    //cell.textLabel?.text = "Hello" 
    //cell.textLabel?.text = arr[(indexPath as NSIndexPath).item] 
    return cell; 
} 


} 

Answer 1

當我編寫我自己的內容攔截器時遇到了類似的問題。當您創建內容阻塞擴展時，您還會創建擴展名爲從中讀取的json文件。現在，重要的一點是擴展只能從位於擴展的bundle目錄中的文件中讀取。

從我可以看到你正在寫入你的主應用程序包中的json文件然後重新加載內容阻止程序。所以內容攔截器只是簡單地查看它自己目錄中的文件（再次，從主包目錄中分離出來）並加載該json文件。

要解決此問題，您需要將文件更改實際寫入位於擴展包目錄中的json文件。

下面是一個例子：

let groupUrl: NSURL = fileManager.containerURLForSecurityApplicationGroupIdentifier("group.com.mygroup")! 

if let path = NSURL(string: "blockerList.json", relativeToURL: groupUrl) { 
    // write your json data to the path here 
    SFContentBlockerManager.reloadContentBlockerWithIdentifier("com.my.extension.identifier", completionHandler: nil) 
} 

另一個重要的事情要注意的是，你必須要求特殊的任何權限讀取和擴展的包寫。