SSLConnectionSocketFactory.java 文件源码

@Override
public Socket connectSocket(
        final int connectTimeout,
        final Socket socket,
        final HttpHost host,
        final InetSocketAddress remoteAddress,
        final InetSocketAddress localAddress,
        final HttpContext context) throws IOException {
    Args.notNull(host, "HTTP host");
    Args.notNull(remoteAddress, "Remote address");
    final Socket sock = socket != null ? socket : createSocket(context);
    if (localAddress != null) {
        sock.bind(localAddress);
    }
    try {
        if (connectTimeout > 0 && sock.getSoTimeout() == 0) {
            sock.setSoTimeout(connectTimeout);
        }
        if (this.log.isDebugEnabled()) {
            this.log.debug("Connecting socket to " + remoteAddress + " with timeout " + connectTimeout);
        }
        sock.connect(remoteAddress, connectTimeout);
    } catch (final IOException ex) {
        try {
            sock.close();
        } catch (final IOException ignore) {
        }
        throw ex;
    }
    // Setup SSL layering if necessary
    if (sock instanceof SSLSocket) {
        final SSLSocket sslsock = (SSLSocket) sock;
        this.log.debug("Starting handshake");
        sslsock.startHandshake();
        verifyHostname(sslsock, host.getHostName());
        return sock;
    } else {
        return createLayeredSocket(sock, host.getHostName(), remoteAddress.getPort(), context);
    }
}