Java請求中的HTTPS SSL GET失敗

Question

當我使用http協議請求某些內容時，我的代碼有效，並且得到了預期的響應。 但是，當我創建一個可與https一起使用的版本時，出現了SSL錯誤。 我已經按照此問題中的步驟進行操作，並且我認為我不需要此問題中所述的密鑰/信任管理器。 請參見下面的代碼。 我將key和trustmanager設置為null，因此java將采用默認值。 我似乎沒有在該步驟上出錯，該錯誤發生在inputStream = connection.getInputStream();行上inputStream = connection.getInputStream(); 。 我不知道我還需要添加/設置scure連接嗎？

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...
    }
}

這是錯誤：

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

如果嘗試發出HTTPS請求，但連接到遠程服務器上的HTTP端口，則會收到此消息。

可能是您在請求中為HTTPS使用了錯誤的端口號...或服務器配置錯誤，並且在應該是HTTPS端口的位置上具有HTTP連接偵聽器。