调用 HttpUrlConnection.connect() 时出现 javax.net.ssl.SSLProtocolException

Question

我正在尝试使用 GoogleMap 的 Android API 在我的应用程序中创建地点搜索功能。我想在用户键入地点名称时填充 AutoComplete TextView。但是我在调​​用 urlConnection.connect(); 语句时遇到了这个异常:

javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0xb911cd50: Failure in SSL library, usually a protocol error
error:1407743E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert inappropriate fallback (external/openssl/ssl/s23_clnt.c:765 0xae688edd:0x00000000)

以下是我使用的代码:

private String downloadUrl(String strUrl) throws IOException {
    String data = "";
    InputStream iStream = null;
    HttpURLConnection urlConnection = null;
    try {
        URL url = new URL(strUrl);

        // Creating an http connection to communicate with url
        urlConnection = (HttpURLConnection) url.openConnection();

        // Connecting to url
        urlConnection.connect();

        // Reading data from url
        iStream = urlConnection.getInputStream();

        BufferedReader br = new BufferedReader(new InputStreamReader(iStream));

        StringBuffer sb = new StringBuffer();

        String line = "";
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }

        data = sb.toString();

        br.close();

    } catch (Exception e) {
        Log.d("Exception while downloading url", e.toString());
    } finally {
        iStream.close();
        urlConnection.disconnect();
    }
    return data;
}

private String getPlacesUrl(String qry) {
        try {
            qry = "input=" + URLEncoder.encode(qry, "utf-8");
        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }

        // Sensor enabled
        String sensor = "sensor=false";


        // place type to be searched
        String types = "types=geocode";

        // Building the parameters to the web service
        String parameters = qry + "&" + types + "&" + sensor + "&" + mKey;

        // Output format
        String output = "json";


        // Building the url to the web service
        String url = "https://maps.googleapis.com/maps/api/place/autocomplete/" + output + "?" + parameters;

        return url;
    }

我已经在谷歌控制台中注册了我的应用程序包和系统的 SHA1。我在调用 getPlaceUrl() 方法后得到的 url 是这种类型的:

https://maps.googleapis.com/maps/api/place/autocomplete/json?input=b&types=geocode&sensor=false&key=API_KEY

请帮我解决这个问题。

Answer 1

我遇到了几乎相同的问题。我的logcat如下:

javax.net.ssl.SSLHandshakeException: javax.net.ssl.SSLProtocolException:SSL 握手中止:ssl=0x60b486b8:SSL 库失败，通常是协议(protocol)错误SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert inappropriate fallback (external/openssl/ssl/s23_clnt.c:744 0x5ea50d74:0x00000000)

最后，我找到了一个解决方案，就是修改httpURLConnection.setHostnameVerifier HostnameVerifier verify return value from false to true，但我不知道根本原因。有没有人可以提供提示？

        httpURLConnection.setHostnameVerifier(new HostnameVerifier() {
            @Override
            public boolean verify(String hostname, SSLSession session) {
                // TODO Auto-generated method stub
                // return false;
                return true;
            }
        });