java - 卡在文件上传中，使用 java 在 DropBox 中下载应用程序

Question

我正在使用 java 开发 Dropbox api。第一个应用程序是在 Dropbox 帐户中上传和下载文件。我有一个 token 可以使用 dropbox 进行身份验证，但是当我尝试在帐户中上传文件时，我收到错误的请求错误，例如:

Exception in thread "main" com.dropbox.core.DbxException$BadResponse: unexpected response code: 401
    at com.dropbox.core.DbxClient$4.handle(DbxClient.java:274)
    at com.dropbox.core.DbxClient$4.handle(DbxClient.java:270)
    at com.dropbox.core.DbxRequestUtil.doGet(DbxRequestUtil.java:265)
    at com.dropbox.core.DbxClient.doGet(DbxClient.java:1912)
    at com.dropbox.core.DbxClient.getAccountInfo(DbxClient.java:270)
    at com.prit.net.Main.main(Main.java:50)

我的代码位于package com.prit.net下面；

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Locale;
import com.dropbox.core.DbxAppInfo;
import com.dropbox.core.DbxClient;
import com.dropbox.core.DbxEntry;
import com.dropbox.core.DbxException;
import com.dropbox.core.DbxRequestConfig;
import com.dropbox.core.DbxWebAuthNoRedirect;
import com.dropbox.core.DbxWriteMode;
public class Main {

    public static void main(String[] args) throws IOException, DbxException, URISyntaxException {
    // Get your app key and secret from the Dropbox developers website.
    final String APP_KEY = "mykey"; // change with yours
    final String APP_SECRET = "mysecret"; // change with yours

    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();
    //Desktop.getDesktop().browse(new URL(authorizeUrl).toURI());
    // 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();
    //DbxAuthFinish authFinish = webAuth.finish(code);
    // System.out.println("Access token is:");
    // System.out.println(authFinish.accessToken.toString());

    // save the value of myToken to a file for future use
    String myToken = "myTokensecretkeyxxxxxxxxxxxxxxxxx"; // change with
                                                                // yours
    // DbxClient client = new DbxClient(config, authFinish.accessToken);
    DbxClient client = new DbxClient(config, myToken);
    System.out.println(config);
    System.out.println(myToken);

    System.out.println("check1");
    File inputFile = new File("C:\\Dev\\foo.txt");
    System.out.println("check2");
    FileInputStream inputStream = new FileInputStream(inputFile);
    System.out.println("check3");
    try {
        DbxEntry.File uploadedFile = client.uploadFile("/FileApiDemo/fooup2.txt",
                DbxWriteMode.add(), inputFile.length(), inputStream);
        System.out.println("Uploaded: " + uploadedFile.toString());
    } catch (Exception e) {

        e.printStackTrace();
    } finally {
        inputStream.close();
    }

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

    // download file
        FileOutputStream outputStream = new FileOutputStream("C:\\Dev\\downloadedfile.txt");
        try {
            DbxEntry.File downloadedFile = client.getFile("/FileApiDemo/fooup2.txt", null,  outputStream);
            System.out.println("Metadata: " + downloadedFile.toString());
        }     finally {
            outputStream.close();
        }

    }

} `

Answer 1

仔细检查myToken的值。您上面的注释代码可能会为您提供一个有效的访问 token ，对吧？如果是这样，请确保您在该流程结束时看到的访问 token 是您要保存并在后续运行中使用的访问 token 。