使用OAuth 2.0进行Java和Google Spreadsheets API授权

Question

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.在官方页面中,他们展示了如何仅使用.NET执行此操作,并说" Java客户端库目前不支持OAuth 2.0 ",并且他们提供了使用OAuth 1.0或Client Login直接使用电子邮件和密码等替代方案.

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

请相信任何建议.

Answer 1

我还发现,开发人员文档为除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,它包括后面部分中的检索电子表格示例.另请注意,您必须将所需范围添加到Java DrEdit示例,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());
        }
    }
}