java - 如何将 dropbox 的 auth token 直接获取到 java 程序中，这样用户就不需要复制粘贴了

Question

我正在开发一个应用程序，我必须从 Dropbox 帐户上传文件和下载文件，该应用程序是一个 Java 桌面应用程序。我已经使用了示例代码并且能够毫无故障地运行它。但我想绕过用户需要将授权代码表单浏览器复制到应用程序，该怎么做。我希望我的应用程序将授权 token 直接获取到应用程序中，因为这会导致用户开销。请各位高手帮帮我。这是我已实现的代码。

import com.dropbox.core.*;

import java.awt.Desktop;
import java.io.*;
import java.util.Locale;

public class Main {
public static void main(String[] args) throws IOException, DbxException {
    // Get your app key and secret from the Dropbox developers website.
    final String APP_KEY = "xxxxxxxxxxxxxxxx";
    final String APP_SECRET = "xxxxxxxxxxxxxxxx";

    DbxAppInfo appInfo = new DbxAppInfo(APP_KEY, APP_SECRET);

    DbxRequestConfig config = new DbxRequestConfig("JavaTutorial/1.0",
        Locale.getDefault().toString());
    DbxWebAuthNoRedirect webAuth = new DbxWebAuthNoRedirect(config, appInfo);

    // Have the user sign in and authorize your app.
    String authorizeUrl = webAuth.start();
    System.out.println("1. Go to: " + authorizeUrl);
    System.out.println("2. Click \"Allow\" (you might have to log in first)");
    System.out.println("3. Copy the authorization code.");
    Desktop.getDesktop().browse(java.net.URI.create(authorizeUrl));
    String code = new BufferedReader(new InputStreamReader(System.in)).readLine().trim();

    // This will fail if the user enters an invalid authorization code.
    DbxAuthFinish authFinish = webAuth.finish(code);

    DbxClient client = new DbxClient(config, authFinish.accessToken);

    System.out.println("Linked account: " + client.getAccountInfo().displayName);

    File inputFile = new File("OpenCv_Video_display_link.txt");
    FileInputStream inputStream = new FileInputStream(inputFile);
    try {
        DbxEntry.File uploadedFile = client.uploadFile("/OpenCv_Video_display_link.txt",
            DbxWriteMode.add(), inputFile.length(), inputStream);
        System.out.println("Uploaded: " + uploadedFile.toString());
    } finally {
        inputStream.close();
    }

    DbxEntry.WithChildren listing = client.getMetadataWithChildren("/");
    System.out.println("Files in the root path:");
    for (DbxEntry child : listing.children) {
        System.out.println("    " + child.name + ": " + child.toString());
    }

    FileOutputStream outputStream = new FileOutputStream("121verbs.pdf");
    try {
        DbxEntry.File downloadedFile = client.getFile("/121verbs.pdf", null,
            outputStream);
        System.out.println("Metadata: " + downloadedFile.toString());
    } finally {
        outputStream.close();
    }
}
}

Answer 1

1. 转到 https://www.dropbox.com/developers/apps
2. 点击应用程序。在 Outh 2 下的此页面上，查找生成的访问 token 。
3. 点击“生成”。
4. 这是您的访问 token 。这样可以验证用户就是您，您不必每次都通过标准授权流程。

不需要的代码我已经注释掉了，你只需要最后一行。

/* // Have the user sign in and authorize your app.
String authorizeUrl = webAuth.start();
System.out.println("1. Go to: " + authorizeUrl);
System.out.println("2. Click \"Allow\" (you might have to log in first)");
System.out.println("3. Copy the authorization code.");
String code = new BufferedReader(new InputStreamReader(System.in)).readLine().trim();

// This will fail if the user enters an invalid authorization code.
DbxAuthFinish authFinish = webAuth.finish(code); */

String accessToken = "Your access token goes here";