Java请求中的HTTPS SSL GET失败

Question

当我使用http协议请求某些内容时，我的代码有效，并且得到了预期的响应。 但是，当我创建一个可与https一起使用的版本时，出现了SSL错误。 我已经按照此问题中的步骤进行操作，并且我认为我不需要此问题中所述的密钥/信任管理器。 请参见下面的代码。 我将key和trustmanager设置为null，因此java将采用默认值。 我似乎没有在该步骤上出错，该错误发生在inputStream = connection.getInputStream();行上inputStream = connection.getInputStream(); 。 我不知道我还需要添加/设置scure连接吗？

private String runSecureService(URL url)
{
    HttpsURLConnection connection = null;
    InputStream inputStream = null;
    SSLContext sslContext = null;

    try
    {
        sslContext = SSLContext.getInstance("SSL");
    }
    catch (NoSuchAlgorithmException e)
    {
        //this exception doesn't occur
    }

    try
    {
        sslContext.init(null, null, null);
    }
    catch (KeyManagementException e)
    {
        //this exception doesn't occur
    }

    HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());

    try
    {
        connection = (HttpsURLConnection) url.openConnection();
        connection.setRequestProperty("Authorization", clientCredentials.getBase64Authentication());

    !-----> inputStream = connection.getInputStream(); <------!
        InputStreamReader responseReader = new InputStreamReader(inputStream);

        //Read, print and return the response.
        ...

        return response;
    }
    catch (IOException e)
    {
        //do stuff...
    }
    finally
    {
        //close connection and inputstream...
    }
}

这是错误：

javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
    at sun.security.ssl.InputRecord.handleUnknownRecord(Unknown Source)
    at sun.security.ssl.InputRecord.read(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)

Answer 1

如果尝试发出HTTPS请求，但连接到远程服务器上的HTTP端口，则会收到此消息。

可能是您在请求中为HTTPS使用了错误的端口号...或服务器配置错误，并且在应该是HTTPS端口的位置上具有HTTP连接侦听器。