我需要连接到 SMTP 服务器并且无法打开连接。握手失败(缺少身份验证)是我到达这里的最远距离。我打开了一个普通服务器的套接字，但在这里没有这样做来发送电子邮件。
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()
}
评论部分显示我试图设置一些东西，但不知道应该在那里。请问大家有什么想法吗？
澄清一下，这是针对使用 SMTP 接收数据的糟糕设计的 API(不是我的想法，但必须使用它)，所以请不要建议 MessageUI，否则应用程序会因为直接发送电子邮件而被拒绝
如果有人感兴趣，这里有 Playground 的完整要点: https://gist.github.com/rafiki270/c004b92deca437934f702efd3508bd83
@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。您的替代方法是通过利用 CFStream 和 NSStream 之间的免费桥接器将 CFStreams 转换为 NSStreams 来使用 CFStream。
以下是有关如何使用 CFStream 进行操作的示例。
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];
希望这会有所帮助。
关于ios - 在 Swift 3 中使用 Stream 打开到 SMTP 服务器的套接字连接，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45404050/
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