(Java) Dropbox: Access Your Own Account

To programmatically interact with your own Dropbox account, such as for uploading, downloading, listing files, etc., go to the Dropbox app console and create an application. Then generate an access token in the online app console as shown in the screenshot below. The access token does not expire, and can be used to access your own account from your own non-web application.

The example code, located below the screenshot, shows how to list the files in the root folder.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRest rest = new CkRest();

    // Connect to the www.dropbox.com endpoint.
    boolean bTls = true;
    int port = 443;
    boolean bAutoReconnect = true;
    boolean success = rest.Connect("api.dropboxapi.com",port,bTls,bAutoReconnect);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    rest.AddHeader("Content-Type","application/json");
    rest.AddHeader("Authorization","Bearer DROPBOX-ACCESS-TOKEN");

    CkJsonObject json = new CkJsonObject();
    // The root folder should be an empty string, not "/"
    json.AppendString("path","");
    json.AppendBool("recursive",false);
    json.AppendBool("include_media_info",false);
    json.AppendBool("include_deleted",false);
    json.AppendBool("include_has_explicit_shared_members",false);

    String responseStr = rest.fullRequestString("POST","/2/files/list_folder",json.emit());
    if (rest.get_LastMethodSuccess() != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    // Success is indicated by a 200 response status code.
    if (rest.get_ResponseStatusCode() != 200) {
        // Examine the request/response to see what happened.
        System.out.println("response status code = " + rest.get_ResponseStatusCode());
        System.out.println("response status text = " + rest.responseStatusText());
        System.out.println("response header: " + rest.responseHeader());
        System.out.println("response body (if any): " + responseStr);
        System.out.println("---");
        System.out.println("LastRequestStartLine: " + rest.lastRequestStartLine());
        System.out.println("LastRequestHeader: " + rest.lastRequestHeader());
        return;
        }

    CkJsonObject jsonResponse = new CkJsonObject();
    jsonResponse.Load(responseStr);

    jsonResponse.put_EmitCompact(false);
    System.out.println(jsonResponse.emit());

    // A sample JSON response is shown at the end of this example.
    // The following code iterates over the entries.
    int numEntries = jsonResponse.SizeOfArray("entries");
    int i = 0;
    while (i < numEntries) {
        jsonResponse.put_I(i);
        System.out.println("----");
        System.out.println("name: " + jsonResponse.stringOf("entries[i].name"));
        System.out.println("path_lower: " + jsonResponse.stringOf("entries[i].path_lower"));
        System.out.println("path_display: " + jsonResponse.stringOf("entries[i].path_display"));
        if (jsonResponse.HasMember("entries[i].sharing_info") == true) {
            System.out.println("has sharing_info...");
            System.out.println("read_only: " + jsonResponse.stringOf("entries[i].sharing_info.read_only"));
            System.out.println("shared_folder_id: " + jsonResponse.stringOf("entries[i].sharing_info.shared_folder_id"));
            }

        if (jsonResponse.HasMember("entries[i].client_modified") == true) {
            // Demonstrate how to parse a date/time:
            CkDateTime ckdt = new CkDateTime();
            success = ckdt.SetFromTimestamp(jsonResponse.stringOf("entries[i].client_modified"));
            // The date/time can now be converted to many other formats, or the individual parts
            // can be accessed.
            boolean bLocalDateTime = true;
            CkDtObj dt = ckdt.GetDtObj(bLocalDateTime);
            System.out.println(dt.get_Year() + "-" + dt.get_Month() + "-" + dt.get_Day());

            }

        i = i+1;
        }

    System.out.println("Success.");

    // {
    //   "entries": [
    //     {
    //       ".tag": "folder",
    //       "name": "chilkat Team Folder",
    //       "path_lower": "/chilkat team folder",
    //       "path_display": "/chilkat Team Folder",
    //       "id": "id:2VqX9RLr-JAAAAAAAAAAAQ",
    //       "shared_folder_id": "1210954290",
    //       "sharing_info": {
    //         "read_only": false,
    //         "shared_folder_id": "1210954290"
    //       }
    //     },
    //     {
    //       ".tag": "file",
    //       "name": "Get Started with Dropbox.pdf",
    //       "path_lower": "/get started with dropbox.pdf",
    //       "path_display": "/Get Started with Dropbox.pdf",
    //       "id": "id:oxE2oMDqH4AAAAAAAAAAAQ",
    //       "client_modified": "2016-05-07T11:47:47Z",
    //       "server_modified": "2016-05-07T11:47:47Z",
    //       "rev": "1483db13f",
    //       "size": 692088
    //     }
    //   ],
    //   "cursor": "AAEnZXciJyS4gzC_tlX6K2na4c8o7_09-dxmXKHpkPPyf3Kl0H4N-VYnz424nCrFOJuhMiM5_RgNAersumx9qe7NgCSdlppr80iFk0gf6vPlecM6SBtLcs6OYXL8ILWiZ62pfnOvgC3WKGlG6dqZ-VXH",
    //   "has_more": false
    // }
    // 
  }
}