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如何在过期后自动更新Gmail凭据

google-oauth gmail-api google-api java

Dhanu K · 技术社区 · 7 年前

我正在使用Gmail Java API, API工作正常,当我们授予google帐户访问权限时,凭据存储在本地,但在凭据过期60分钟后,它不会自动更新凭据。使用我的代码进行调试时,它会在以下位置停止

凭据凭据=应用程序。授权(“用户”);

如何在凭据过期后处理,它只有在调用oauth2身份验证后才能再次工作。是否可以自动刷新此功能这是我的代码块

/**
     * Creates an authorized Credential object.
     * @return an authorized Credential object.
     * @throws IOException
     */
    public static Credential authorize() throws IOException {
        // Load client secrets.
        InputStream in =
                Quickstart.class.getResourceAsStream("/client_secret.json");
        GoogleClientSecrets clientSecrets =
                GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
        HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
        HttpSession session = request.getSession();
        User user =  (User) session.getAttribute("USER");
        java.io.File DATA_STORE_DIR = new java.io.File(
                //System.getProperty("user.home"), ".credentials/"+user.getUserAccountId()+"/gmail-java-quickstart");
                Common.commonPath+File.separator+"client_secrets"+File.separator+user.getUserAccountId()+"/gmail-java-quickstart");
        DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
        // Build flow and trigger user authorization request.
        GoogleAuthorizationCodeFlow flow =
                new GoogleAuthorizationCodeFlow.Builder(
                        HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
                        .setDataStoreFactory(DATA_STORE_FACTORY)
                        .setAccessType("offline")
                        .build();
        System.out.println("*************getApprovalPrompt:"+flow.getApprovalPrompt());
        AuthorizationCodeInstalledApp app = new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()){
            protected void onAuthorization(AuthorizationCodeRequestUrl authorizationUrl) throws java.io.IOException {
                //System.out.println("authorizationUrl:"+authorizationUrl);
            }
        };
        Credential credential = app.authorize("user");
        //System.out.println("*************AUTH_KKEY:"+credential.getAccessToken());
        //System.out.println("Credentials saved to " + DATA_STORE_DIR.getAbsolutePath());
        return credential;
    }

    /**
     * Build and return an authorized Gmail client service.
     * @return an authorized Gmail client service
     * @throws IOException
     */
    public static Gmail getGmailService() throws IOException {
        Credential credential = authorize();
        return new Gmail.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential)
                .setApplicationName(APPLICATION_NAME)
                .build();
    }

    public List<Message> listMessagesWithLabels(List<String> labelIds,StringBuilder paginationtokenBuilder,Long maxResults) throws IOException {
        List<Message> messages = new ArrayList<Message>();
        try {
            Gmail service = getGmailService();
            // some logic bla bla
        }catch(Exception ex){
            ex.printStackTrace();
            return messages;
        }
    }

1 回复 | 直到 7 年前

Mohan Kanakala 7 年前

Hay,我也遇到了同样的问题,但在API方面运气不佳。我有一些解决问题的方法,看看是否有用。

当令牌过期时,API会发出异常(在某些情况下是超时)。这里可以手动刷新令牌(可能带有catch块)。随后的请求将继续使用由前一个请求刷新的更新令牌。下面的代码段。

例外情况下:

try {
    response1 = Quickstart.getGmailService().users().messages().list(userId).setLabelIds(labelIds).execute();       
    return response1.getResultSizeEstimate();
} catch (com.google.api.client.auth.oauth2.TokenResponseException e) {
    e.printStackTrace();
    FileUtils.deleteDirectory(new File(CLIENT_SECRET_PATH+File.separator+"client_secrets"));
    response.sendRedirect("/dashboard"); // redirect to your oauth request URI
} catch (IOException e) {
    e.printStackTrace();
}

如果超时(UI):

$.ajax({
    url:"listGmailLabels", // Request that is hitting Gmail API
    type:"POST",
    success:function(data){
        // Success logic goes here
    },
    complete:function(event){
        if(event.status == 504){
            alert('Token expired! Getting a new refresh token.');
            $.ajax({
                url:"clearClientSecret", // service call to cleanup the expired token
                success:function(){
                    window.location.reload();
                }
            })
        }
    }
 });

清理过期令牌的服务:

@RequestMapping(value="/clearClientSecret",method= {RequestMethod.POST,RequestMethod.GET})
    public void clearClientSecret(HttpServletRequest request,HttpServletResponse response) {
        try {
            String path=CLIENT_SECRET_PATH+File.separator+"client_secrets";
            FileUtils.deleteDirectory(new File(path));
            response.sendRedirect("/dashboard");// redirect to your oauth request URI
        } catch (IOException e1) {
            e1.printStackTrace();
        }

    }

我知道这可能不是一个合适的解决方案,但这正是我所尝试的解决方案,所以请让我们所有人都知道是否有什么可以让它变得更好。