如何在Swift 3中使用URLSession和Proxy

Question

对于API请求,我正在尝试使用代理设置URLSession.出于测试目的,我使用公共代理和响应IP的API.

func makeRequestViaUrlSessionProxy(_ url: String, completion: @escaping (_ result: String?) -> ()) {

    let request = URLRequest(url: URL(string: url)!)

    let config = URLSessionConfiguration.default
    config.requestCachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
    config.connectionProxyDictionary = [AnyHashable: Any]()
    config.connectionProxyDictionary?[kCFNetworkProxiesHTTPEnable as String] = 1
    config.connectionProxyDictionary?[kCFNetworkProxiesHTTPProxy as String] = "142.54.173.19"
    config.connectionProxyDictionary?[kCFNetworkProxiesHTTPPort as String] = 8888

    let session = URLSession.init(configuration: config, delegate: nil, delegateQueue: OperationQueue.current)

    let task = session.dataTask(with: request) {
        (data: Data?, response: URLResponse?, error: Error?) in
        if error != nil {
            NSLog("Client-side error in request to \(url): \(error)")
            completion(nil)
            return
        }

        if data == nil {
            NSLog("Data from request to \(url) is nil")
            completion(nil)
            return
        }

        let httpResponse = response as? HTTPURLResponse
        if httpResponse?.statusCode != 200 {
            NSLog("Server-side error in request to \(url): \(httpResponse)")
            completion(nil)
            return
        }

        let encodingName = response?.textEncodingName != nil ? response?.textEncodingName : "utf-8"
        let encoding = CFStringConvertEncodingToNSStringEncoding(CFStringConvertIANACharSetNameToEncoding(encodingName as CFString!))
        let stringData = String(data: data!, encoding: String.Encoding(rawValue: UInt(encoding)))
        session.invalidateAndCancel()
        completion(stringData)
    }
    task.resume()
}

被称为:

override func viewDidLoad() {
    super.viewDidLoad()
    makeRequestViaUrlSessionProxy("https://api.ipify.org?format=json") { string in
        print(string)
    }
}

看起来config完全被忽略了,因为即使使用组成的代理IP,响应的IP也始终是实际的设备IP

任何帮助都非常感谢.

编辑:根据用户hasan83的建议,"HTTPS密钥"似乎不是一个选项.

Answer 1

我认为工作(应该被弃用)键是:

kCFStreamPropertyHTTPSProxyHost
kCFStreamPropertyHTTPSProxyPort

你能试试这段代码吗？

func makeRequestViaUrlSessionProxy(_ url: String, completion: @escaping (_ result: String?) -> ()) {

    let request = URLRequest(url: URL(string: url)!)

    let config = URLSessionConfiguration.default
    config.requestCachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
    config.connectionProxyDictionary = [AnyHashable: Any]()
    config.connectionProxyDictionary?[kCFNetworkProxiesHTTPEnable as String] = 1
    config.connectionProxyDictionary?[kCFNetworkProxiesHTTPProxy as String] = "142.54.173.19"
    config.connectionProxyDictionary?[kCFNetworkProxiesHTTPPort as String] = 8888
    config.connectionProxyDictionary?[kCFStreamPropertyHTTPSProxyHost as String] = "142.54.173.19"
    config.connectionProxyDictionary?[kCFStreamPropertyHTTPSProxyPort as String] = 8888

    let session = URLSession.init(configuration: config, delegate: nil, delegateQueue: OperationQueue.current)

    let task = session.dataTask(with: request) {
        (data: Data?, response: URLResponse?, error: Error?) in
        if error != nil {
            NSLog("Client-side error in request to \(url): \(error)")
            completion(nil)
            return
        }

        if data == nil {
            NSLog("Data from request to \(url) is nil")
            completion(nil)
            return
        }

        let httpResponse = response as? HTTPURLResponse
        if httpResponse?.statusCode != 200 {
            NSLog("Server-side error in request to \(url): \(httpResponse)")
            completion(nil)
            return
        }

        let encodingName = response?.textEncodingName != nil ? response?.textEncodingName : "utf-8"
        let encoding = CFStringConvertEncodingToNSStringEncoding(CFStringConvertIANACharSetNameToEncoding(encodingName as CFString!))
        let stringData = String(data: data!, encoding: String.Encoding(rawValue: UInt(encoding)))
        session.invalidateAndCancel()
        completion(stringData)
    }
    task.resume()
}

另外,请确保您的代理服务器配置为处理https请求.

注意:它可能会对deprecated这些密钥发出警告但密钥仍然有效(请参阅https://forums.developer.apple.com/thread/19356#131446)