Question

我需要连接到SMTP服务器并且无法打开连接。失败的握手（缺少身份验证）是我到这里最远的。我打开普通服务器的套接字，但没有在这里发送电子邮件。

    private func connect() throws {
        var input: InputStream? = nil
        var output: OutputStream? = nil

        Stream.getStreamsToHost(withName: server, port: port, inputStream: &input, outputStream: &output)

        guard let inputSafe = input, let outputSafe = output else {
            throw FailerError.unableToConnectToHost
        }

        self.inputStream = inputSafe
        self.outputStream = outputSafe

        // TODO: Authentication using login

        // Enable SSL/TLS on the streams
//        inputStream!.setProperty(kCFStreamSocketSecurityLevelNegotiatedSSL, forKey: Stream.PropertyKey(rawValue: kCFStreamPropertySocketSecurityLevel as String))
//        outputStream!.setProperty(kCFStreamSocketSecurityLevelNegotiatedSSL, forKey: Stream.PropertyKey(rawValue: kCFStreamPropertySocketSecurityLevel as String))
//        
//        // Define custom SSL/TLS settings
//        let sslSettings: [NSString : Any] = [
//             NSStream automatically sets up the socket, the streams and creates a trust object and evaulates it before you even get a chance to check the trust yourself. Only proper SSL certificates will work with this method. If you have a self signed certificate like I do, you need to disable the trust check here and evaulate the trust against your custom root CA yourself.
//            NSString(format: kCFStreamSSLValidatesCertificateChain): kCFBooleanFalse,
//            //
//            NSString(format: kCFStreamSSLPeerName): kCFNull,
//            // We are an SSL/TLS client, not a server
//            NSString(format: kCFStreamSSLIsServer): kCFBooleanFalse,
//            
//            NSString(format: kCFStreamSocketSecurityLevelNegotiatedSSL): kCFBooleanTrue
//        ]
//        
//        // Set the SSL/TLS settingson the streams
//        inputStream!.setProperty(sslSettings, forKey: Stream.PropertyKey(rawValue: kCFStreamPropertySSLSettings as String))
//        outputStream!.setProperty(sslSettings, forKey: Stream.PropertyKey(rawValue: kCFStreamPropertySSLSettings as String))


        inputStream.delegate = self
        outputStream.delegate = self

        inputStream.schedule(in: .main, forMode: .commonModes)
        outputStream.schedule(in: .main, forMode: .commonModes)

        inputStream.open()
        outputStream.open()
    }

评论的部分显示我试图设置一些东西，但不知道应该是什么。有人想过任何想法吗？

只是为了澄清，这是一个设计糟糕的API使用SMTP接收数据（不是我的想法，但必须使用它）所以请不要建议MessageUI或由于直接发送电子邮件，应用程序将被拒绝：）

如果有人有兴趣，游乐场的全部要点就在这里： https://gist.github.com/rafiki270/c004b92deca437934f702efd3508bd83

Answer 1

@Ondrej根据Apple文档“Cocoa流编程指南简介”，提到NSStream（Objective C）/ Stream（Swift）类不支持连接到iOS上的远程主机。您的备用方法是利用CFStream利用CFStream和NSStream之间的免费网桥将CFStream转换为NSStreams。

以下是有关如何使用CFStream执行此操作的示例。

CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)[website host], 80, &readStream, &writeStream);

NSInputStream *inputStream = (__bridge_transfer NSInputStream *)readStream;
NSOutputStream *outputStream = (__bridge_transfer NSOutputStream *)writeStream;
[inputStream setDelegate:self];
[outputStream setDelegate:self];
[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream open];
[outputStream open];

希望这有帮助。

使用Swift 3中的Stream打开与SMTP服务器的套接字连接

1 个答案: