java - Watson 对话服务 - 未经授权 : Access is denied due to invalid credentials

Question

我尝试通过 Java 应用程序访问 Watson Conversation Service。因此，我在 Bluemix 上创建了服务并编写了一个小型应用程序。

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);
}
}

我希望得到 Watson 服务的简单答案。

如果我运行该应用程序，尽管我使用 Bluemix 提供的凭据，但我收到了未授权异常。

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)

我不知道为什么会出现这个异常。有什么想法吗？

Answer 1

问题已解决。

我使用了德国地点。因此 API 端点需要是 https://gateway-fra.watsonplatform.net/conversation/api ，而不是默认 URL。

ConversationService 的构造函数使用默认 URL，即 https://gateway.watsonplatform.net/conversation/api 。要更改端点，需要调用: service.setEndPoint("https://gateway-fra.watsonplatform.net/conversation/api")

在我这样做之后，一切都很顺利。