Watson Conversation Service-未经授权：由于凭据无效而拒绝访问

Question

我试图通过Java应用程序访问Watson对话服务。因此，我在Bluemix上创建了Service并编写了一个小型Application。

package de.kkh.comp.WatsonDemo;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

import com.ibm.watson.developer_cloud.conversation.v1.ConversationService;
import com.ibm.watson.developer_cloud.conversation.v1.model.MessageRequest;
import com.ibm.watson.developer_cloud.conversation.v1.model.MessageResponse;

public class App {

private static final String USERNAME = "{USERNAME}";
private static final String PASSWORD = "{PASSWORD}";
private static final String WORKSPACE_ID = "{WORKSPACE_ID}";

public static void main(String[] args) {
    ConversationService service = new ConversationService(ConversationService.VERSION_DATE_2017_02_03);
    service.setUsernameAndPassword(USERNAME, PASSWORD);

    MessageRequest newMessage = new MessageRequest.Builder().inputText("Hallo").context(new HashMap<String,Object>()).build();

    MessageResponse response = service.message(WORKSPACE_ID, newMessage).execute();

    System.out.println(response);
}
}

我希望我能得到Watson Service的简单答复。

如果我运行该应用程序，尽管我使用了Bluemix给出的凭证，但是会出现未授权异常。

Aug 02, 2017 7:56:19 PM okhttp3.internal.platform.Platform log
INFORMATION: --> POST https://gateway.watsonplatform.net/conversation/api/v1/workspaces/{WORKSPACE_ID}/message?version=2017-02-03 http/1.1 (39-byte body)
Aug 02, 2017 7:56:20 PM okhttp3.internal.platform.Platform log
INFORMATION: <-- 401 Not Authorized https://gateway.watsonplatform.net/conversation/api/v1/workspaces/{WORKSPACE_ID}/message?version=2017-02-03 (214ms, unknown-length body)
Aug 02, 2017 7:56:20 PM com.ibm.watson.developer_cloud.service.WatsonService processServiceCall
SCHWERWIEGEND: POST https://gateway.watsonplatform.net/conversation/api/v1/workspaces/{WORKSPACE_ID}/message?version=2017-02-03, status: 401, error: Not Authorized
Exception in thread "main" com.ibm.watson.developer_cloud.service.exception.UnauthorizedException: Unauthorized: Access is denied due to invalid credentials
    at com.ibm.watson.developer_cloud.service.WatsonService.processServiceCall(WatsonService.java:492)
    at com.ibm.watson.developer_cloud.service.WatsonService$2.execute(WatsonService.java:254)
    at de.kkh.comp.WatsonDemo.App.main(App.java:26)

我没有任何线索为什么我得到这个例外。有任何想法吗？

Answer 1

问题解决了。

我曾在德国住过。因此，API端点需要为https://gateway-fra.watsonplatform.net/conversation/api，而不是Default-URL。

ConversationService的构造方法使用默认URL，即https://gateway.watsonplatform.net/conversation/api。要更改端点，必须调用： service.setEndPoint("https://gateway-fra.watsonplatform.net/conversation/api")

我这样做之后，一切正常。