使用Google+域API獲取Google+圈子信息時發生的問題

Question

我正在開發一個小型網絡應用程序，其中我正在與Google+域API進行集成。 我正在使用OAuth2身份驗證。我爲來自Google API控制檯的我的Web應用程序 生成了client_id和client_secret。 使用Google+域API，我可以生成訪問令牌。

1. 生成授權URL

   List<String> SCOPE = Arrays.asList(
   "https://www.googleapis.com/auth/plus.me", 
   "https://www.googleapis.com/auth/plus.circles.read", 
   "https://www.googleapis.com/auth/plus.stream.write"); 
   
   //Sets up Authorization COde flow 
   GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(new NetHttpTransport(), 
       new JacksonFactory(), 
       "xxx","yyy",SCOPE).setApprovalPrompt("force").setAccessType("offline").build(); 
   
   //Builds the uthorization URL 
   String url = flow.newAuthorizationUrl().setRedirectUri(<REDIRECT_URI>).build(); 
   out.println("<div id='googleplus'></div><a href='"+url+"' rel='external' ><img src='googleplus.jpg'></a> <b>Configure</b></div>"); 
   session.setAttribute("CodeFlow", flow); 
   

2. 後授權

   GoogleAuthorizationCodeFlow flow=(GoogleAuthorizationCodeFlow)session. getAttribute("CodeFlow"); 
   
   //After authorization,fetches the value of code parameter 
   String authorizationCode=request.getParameter("code"); 
   
   //Exchanges the authorization code to get the access token 
   GoogleTokenResponse tokenResponse=flow.newTokenRequest(authorizationCode). 
       setRedirectUri(<REDIRECT_URI>).execute(); 
   
   GoogleCredential credential = new GoogleCredential.Builder().setTransport(new NetHttpTransport()).setJsonFactory(new JacksonFactory()) 
   .setClientSecrets("xxx", "yyy") 
   .addRefreshListener(new CredentialRefreshListener(){ 
   
       public void onTokenErrorResponse(Credential credential, TokenErrorResponse errorResponse) throws java.io.IOException{ 
        System.out.println("Credential was not refreshed successfully. " 
          + "Redirect to error page or login screen."); 
   
       } 
   
   
       @Override 
       public void onTokenResponse(Credential credential, TokenResponse tokenResponse) 
         throws IOException { 
        System.out.println("Credential was refreshed successfully."); 
        System.out.println("Refresh Token :"+tokenResponse.getRefreshToken()); 
   
       } 
   }).build(); 
   
   //Set authorized credentials. 
   credential.setFromTokenResponse(tokenResponse); 
   credential.refreshToken(); 
   

3. 提取圈子信息：

   PlusDomains plusDomains = new PlusDomains.Builder(
        new NetHttpTransport(), new JacksonFactory(), credential) 
        .setApplicationName("DomainWebApp") 
        .setRootUrl("https://www.googleapis.com/") 
        .build(); 
   PlusDomains.Circles.List listCircles=plusDomains.circles().list("me"); 
   listCircles.setMaxResults(5L); 
   System.out.println("Circle URL:"+listCircles.buildHttpRequestUrl()); 
   CircleFeed circleFeed=listCircles.execute(); 
   System.out.println("Circle feed:"+circleFeed); 
   List<Circle> circles =circleFeed.getItems(); 
   
   while (circles != null) { 
        for (Circle circle : circles) { 
         out.println("Circle name : "+circle.getDisplayName()+" Circle id : "+circle.getId()); 
        } 
   
        // When the next page token is null, there are no additional pages of 
        // results. If this is the case, break. 
        if (circleFeed.getNextPageToken() != null) { 
        // Prepare the next page of results 
        listCircles.setPageToken(circleFeed.getNextPageToken()); 
   
        // Execute and process the next page request 
        circleFeed = listCircles.execute(); 
        circles = circleFeed.getItems(); 
        } else { 
        circles = null; 
        } 
       } 
   

我得到下面的錯誤：

com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden 
{ 
    "code" : 403, 
    "errors" : [ { 
    "domain" : "global", 
    "message" : "Forbidden", 
    "reason" : "forbidden" 
    } ], 
    "message" : "Forbidden" 
} 
    com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:145) 
    com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:113) 

注：我也啓用了Google+ API域名在我的谷歌API控制檯。 REDIRECT_URI ="http://localhost:8080/DomainWebApp/oauth2callback"因爲它是一個網絡應用程序。 有何建議？

Answer 1

首先要檢查的是應用程序代表Google Apps用戶撥打電話。例如，如果用戶帳戶是@gmail帳戶，則該請求將不被允許。 Google+ Domains API僅適用於Google Apps域用戶，並且僅適用於其域中的請求。