Question

我已经向android中的Microsoft qna makers api发了帖子请求。但我得到以下例外：

java.io.FileNotFoundException: https://westus.api.cognitive.microsoft.com/qnamaker/v2.0/knowledgebases/<My KB ID>/generateAnswer

发布帖子请求的API格式：

    POST /knowledgebases/<Your KB ID>/generateAnswer HTTP/1.1
Host: https://westus.api.cognitive.microsoft.com/qnamaker/v1.0
Ocp-Apim-Subscription-Key: <Your Subscription key>
Content-Type: application/json
Cache-Control: no-cache
{"question": "Question goes here"}

我只是遵循上面指定的格式，并在 getText（）方法中发布了一个帖子请求。并且使用 RetrieveFeedTask 类在后台调用此方法。这是我用来发布帖子请求的代码：

public class MainActivity extends AppCompatActivity {

Button mButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mButton = (Button) findViewById(R.id.button);
    mButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            RetrieveFeedTask task = new RetrieveFeedTask();
            task.execute();
        }
    });
}



// Create GetText Metod
public void GetText() throws UnsupportedEncodingException {

    String text = "";
    BufferedReader reader = null;

    // Send data
    try {

        // Defined URL  where to send data
        URL url = new URL("https://westus.api.cognitive.microsoft.com/qnamaker/v2.0/knowledgebases/<My KB Id>/generateAnswer");

        // Send POST data request

        URLConnection conn = url.openConnection();
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setRequestProperty("Host", "https://westus.api.cognitive.microsoft.com/qnamaker/v2.0/");
        conn.setRequestProperty("Ocp-Apim-Subscription-Key", "<My Ocp-Apim-Subscription-Key>");
        conn.setRequestProperty("Content-Type", "application/json");

        //Create JSONObject here
        JSONObject jsonParam = new JSONObject();
        jsonParam.put("question", "hi");


        OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
        wr.write(URLEncoder.encode(jsonParam.toString(), "UTF-8"));
        wr.flush();
        Log.d("karma", "json is " + jsonParam);

        // Get the server response

        reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        StringBuilder sb = new StringBuilder();
        String line = null;


        // Read Server Response
        while ((line = reader.readLine()) != null) {
            // Append server response in string
            sb.append(line + "\n");
        }


        text = sb.toString();
        Log.d("karma ", "response is " + text);
    } catch (Exception ex) {
        Log.d("karma", "exception at last " + ex);
    } finally {
        try {

            reader.close();
        } catch (Exception ex) {
        }
    }


}

class RetrieveFeedTask extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(Void... voids) {
        try {
            Log.d("karma", "called");
            GetText();
            Log.d("karma", "after called");

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            Log.d("karma", "Exception occurred " + e);
        }

        return null;
    }
}
 }

请帮助我解决这个问题......

向Microsoft qna API发出post请求时发生java.io.FileNotFoundException

0 个答案: