使用OAuth 2.0进行Java和Google Spreadsheets API授权

时间:2013-04-10 23:50:42

标签: java oauth-2.0 google-drive-api google-spreadsheet-api

我想使用Java阅读Google Spreadsheets,推荐的方法是使用Google Spreadsheets API

当您想要使程序安全时问题就开始了,因此他们鼓励您使用OAuth 2.0。在official page中,他们展示了如何仅使用.NET执行此操作并说“ Java客户端库当前不支持OAuth 2.0 ”,并且他们提供了使用{{1或OAuth 1.0直接使用电子邮件密码

这是肯定的吗?,没有办法通过Java进行OAuth 2.0身份验证,可能不是直接使用Java客户端库,而是通过具有特定参数的请求。

请感谢任何建议。

3 个答案:

答案 0 :(得分:9)

我还发现developer docs为除OAuth2之外的所有内容提供了Java示例,这非常愚蠢。这是我用来使它工作的一些示例代码。为了完整起见,它在后面的部分中包含retrieving spreadsheets example。另请注意,您必须将所需的范围添加到Java DrEdit示例中,如下所示。

public class GSpreadsheets {

    private static final String CLIENT_ID = "YOUR_CLIENT_ID";
    private static final String CLIENT_SECRET = "YOUR_SECRET_ID";
    private static final String REDIRECT_URI = "urn:ietf:wg:oauth:2.0:oob";

    public static void main(String[] args) throws Exception {

        if (CLIENT_ID.equals("YOUR_CLIENT_ID") || CLIENT_SECRET.equals("YOUR_SECRET_ID")) {
            throw new RuntimeException(
                    "TODO: Get client ID and SECRET from https://cloud.google.com/console");
        }

            // get credentials similar to Java DrEdit example
            // https://developers.google.com/drive/examples/java
        HttpTransport httpTransport = new NetHttpTransport();
        JsonFactory jsonFactory = new JacksonFactory();

        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
                httpTransport, jsonFactory, CLIENT_ID, CLIENT_SECRET,
                Arrays.asList(DriveScopes.DRIVE, 
                              "https://spreadsheets.google.com/feeds", 
                              "https://docs.google.com/feeds"))
                .setAccessType("online")
                .setApprovalPrompt("auto").build();

        String url = flow.newAuthorizationUrl().setRedirectUri(REDIRECT_URI).build();
        System.out.println("Please open the following URL in your "
                + "browser then type the authorization code:");
        System.out.println("  " + url);
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String code = br.readLine();

        GoogleTokenResponse response = flow.newTokenRequest(code).setRedirectUri(REDIRECT_URI).execute();
        GoogleCredential credential = new GoogleCredential().setFromTokenResponse(response);

            // create the service and pass it the credentials you created earlier
        SpreadsheetService service = new SpreadsheetService("MyAppNameHere");
        service.setOAuth2Credentials(credential);

        // Define the URL to request.  This should never change.
        URL SPREADSHEET_FEED_URL = new URL(
            "https://spreadsheets.google.com/feeds/spreadsheets/private/full");

        // Make a request to the API and get all spreadsheets.
        SpreadsheetFeed feed = service.getFeed(SPREADSHEET_FEED_URL, SpreadsheetFeed.class);
        List<SpreadsheetEntry> spreadsheets = feed.getEntries();

        // Iterate through all of the spreadsheets returned
        for (SpreadsheetEntry spreadsheet : spreadsheets) {
          // Print the title of this spreadsheet to the screen
          System.out.println(spreadsheet.getTitle().getPlainText());
        }
    }
}

答案 1 :(得分:3)

Google Data Java Client Library现在支持OAuth 2.0:

https://code.google.com/p/gdata-java-client/source/detail?r=505

不幸的是,库中没有完整的样本显示如何使用它。我建议检查这两个链接以汇总信息以使其工作:

答案 2 :(得分:1)

[编辑]

Java OAuth2代码

博客文章[google-spreadsheet-api]和OAuth2,代码为 http://soatutorials.blogspot.co.at/2013/08/google-spreadsheet-api-connecting-with.html

相关问题: OAuth2 authorization from Java/Scala using google gdata client API

[结束编辑]

我使用过:Google驱动 DrEdit 教程,完整示例演示了如何将OAuth 2.0与Drive配合使用。该代码适用于Google电子表格GData样式API。 (注意:不包括刷新令牌,但刷新令牌的工作方式正如您所期望的那样,所以不要太难添加。) -

额外注意:更好的文档API是Google-Apps-Script。