description

# connect static method

Future<RawSecureSocket> connect(

1. dynamic host,
2. int port, {
3. SecurityContext? context,
4. bool onBadCertificate(
   1. X509Certificate certificate
   )?,
5. void keyLog(
   1. String
   )?,
6. List<String>? supportedProtocols,
7. Duration? timeout,

})
override

Constructs a new secure client socket and connect it to the given host on the given port.

The returned Future is completed with the RawSecureSocket when it is connected and ready for subscription.

The certificate provided by the server is checked using the trusted certificates set in the SecurityContext object If a certificate and key are set on the client, using SecurityContext.useCertificateChain and SecurityContext.usePrivateKey, and the server asks for a client certificate, then that client certificate is sent to the server.

`onBadCertificate` is an optional handler for unverifiable certificates. The handler receives the X509Certificate, and can inspect it and decide (or let the user decide) whether to accept the connection or not. The handler should return true to continue the RawSecureSocket connection.

`onBadCertificate` is an optional handler for unverifiable certificates. The handler receives the X509Certificate, and can inspect it and decide (or let the user decide) whether to accept the connection or not. The handler should return true to continue the SecureSocket connection.

`keyLog` is an optional callback that will be called when new TLS keys are exchanged with the server. `keyLog` will receive one line of text in NSS Key Log Format for each call. Writing these lines to a file will allow tools (such as Wireshark) to decrypt content sent through this socket. This is meant to allow network-level debugging of secure sockets and should not be used in production code. For example:

    final log = File('keylog.txt');
    final socket = await SecureSocket.connect('www.example.com', 443,
        keyLog: (line) => log.writeAsStringSync(line, mode: FileMode.append));

`supportedProtocols` is an optional list of protocols (in decreasing order of preference) to use during the ALPN protocol negotiation with the server. Example values are "http/1.1" or "h2". The selected protocol can be obtained via RawSecureSocket.selectedProtocol.

## Implementation

    static Future<RawSecureSocket> connect(
      host,
      int port, {
      SecurityContext? context,
      bool onBadCertificate(X509Certificate certificate)?,
      void keyLog(String line)?,
      List<String>? supportedProtocols,
      Duration? timeout,
    }) {
      _RawSecureSocket._verifyFields(host, port, false, false);
      return RawSocket.connect(host, port, timeout: timeout).then((socket) {
        return secure(
          socket,
          context: context,
          onBadCertificate: onBadCertificate,
          keyLog: keyLog,
          supportedProtocols: supportedProtocols,
        );
      });
    }