Question

在这里，我需要有关Android应用程序的一些帮助：基本上，我正在尝试向HTTPS开发的服务器发送Node.js请求。该服务器正在使用自签名证书。现在我知道Android需要AsyncTask才能发送HTTPS请求，因此我设法实现了以下目标：

public class RequestSender extends AsyncTask<String, Void, String> {
    public static final String REQUEST_METHOD = "GET";
    public static final int READ_TIMEOUT = 15000;
    public static final int CONNECTION_TIMEOUT = 15000;

    @Override
    protected String doInBackground(String... params){
        String stringUrl = params[0];
        String result = "RES";
        String inputLine;
        try {
            //Create a URL object holding our url
            URL myUrl = new URL(stringUrl);

            //Create a connection
            HttpsURLConnection connection =(HttpsURLConnection) myUrl.openConnection();

            //Set methods and timeouts
            connection.setHostnameVerifier(new AllowAllHostnameVerifier());
            connection.setRequestMethod(REQUEST_METHOD);
            connection.setReadTimeout(READ_TIMEOUT);
            connection.setConnectTimeout(CONNECTION_TIMEOUT);

            //Connect to our url
            connection.connect();

            //Create a new InputStreamReader
            InputStreamReader streamReader = new InputStreamReader(connection.getInputStream());

            //Create a new buffered reader and String Builder
            BufferedReader reader = new BufferedReader(streamReader);
            StringBuilder stringBuilder = new StringBuilder();

            //Check if the line we are reading is not null
            while((inputLine = reader.readLine()) != null){
                stringBuilder.append(inputLine);
            }

            //Close our InputStream and Buffered reader
            reader.close();
            streamReader.close();

            //Set our result equal to our stringBuilder
            result = stringBuilder.toString();
            Log.d("REQ", "Result received: " + result);
        }
        catch(IOException e){
            e.printStackTrace();
            result = "";
            Log.e("REQ", "REQ Exception: " + e.getMessage());
        }
        return result;
    }
    protected void onPostExecute(String result){
        super.onPostExecute(result);
    }

为了测试它，这是我在MainActivity中所做的：

RequestSender rSender = new RequestSender();
        rSender.execute(CommandSender.AUTH);
        try {
            String res = rSender.get();
            if(res != null)
                Toast.makeText(this, "Response NOT NULL: " + res, Toast.LENGTH_LONG).show();
            else
                Toast.makeText(this, "Response: NULL!", Toast.LENGTH_LONG).show();
        }
        catch(InterruptedException | ExecutionException ecc){
            ecc.printStackTrace();
        }

现在，如果我使用先前的AsyncTask向https://www.google.com发送HTTPS请求，我会得到Google的html代码，这很好。那意味着我的AsyncTask工作正常吗？

问题是，如果我将HTTPS请求发送到在线且正在运行的Node.js服务器，它将无法正常工作。我以为使用的自签名证书可能是问题，所以我添加了以下内容：

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true" />
    <domain-config>
        <domain includeSubdomains="true">example.com</domain>
        <trust-anchors>
            <certificates src="@raw/cert"/>
        </trust-anchors>
    </domain-config>
</network-security-config>

到res/xml/network_security_config.xml和服务器中使用的证书

res/raw/cert.pem

毕竟，我仍然得到空洞的答复。 Toast中显示的MainActivity仅打印：Response NOT NULL!:

为了使事情在这里工作，我必须做什么？

谢谢

Answer 1

首先，我有两个问题。

您是否使用wget或curl测试了请求？
您是否已将网络安全配置添加到AndroidManifest.xml？

欢呼

Android Studio：如何将HTTPS请求发送到使用自签名证书的Node.js服务器？

1 个答案: