Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3/4TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

Java Examples

ASN.1
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
Facebook
FileAccess
Firebase
GMail REST API
GeoOp
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
Google Sheets
Gzip
HTML-to-XML/Text
HTTP
HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)

Java KeyStore (JKS)
Jira
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
PayPal
Peoplevox
QuickBooks
REST
REST Misc
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Shopify
Socket/SSL/TLS
Spider
Stream
Stripe
SugarCRM
Tar Archive
Twitter
Upload
VoiceBase
Walmart
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Xero
Zip
curl
eBay

 

 

 

(Java) Download File from Dropbox

Downloads a file from Dropbox, streaming it directly to a file in the filesystem.

Chilkat Java Downloads

Java Libs for Windows, Linux, Alpine Linux,
MAC OS X, Solaris, FreeBSD, OpenBSD,
Raspberry Pi and other single board computers

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.

    //  A Dropbox access token should have been previously obtained.
    //  Dropbox access tokens do not expire.
    //  See Dropbox Access Token.

    CkRest rest = new CkRest();

    //  Connect to Dropbox
    boolean success = rest.Connect("content.dropboxapi.com",443,true,true);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
    }

    //  Add request headers.
    rest.AddHeader("Authorization","Bearer DROPBOX_ACCESS_TOKEN");

    //  The download "parameters" are contained in JSON passed in an HTTP request header.
    //  This is the JSON indicating the file to be downloaded:
    //  {
    //     "path": "/Homework/lit/hamlet.xml",
    //  }

    CkJsonObject json = new CkJsonObject();
    json.AppendString("path","/Homework/lit/hamlet.xml");
    rest.AddHeader("Dropbox-API-Arg",json.emit());

    //  Setup a file stream for the download
    CkStream fileStream = new CkStream();
    fileStream.put_SinkFile("qa_output/hamletFromDropbox.xml");

    //  Indicate that the call to FullRequestNoBody should send the response body
    //  to fileStream if the response status code is 200.
    //  If a non-success response status code is received, then nothing
    //  is streamed to the output file and the error response is returned by FullRequestNoBody.
    int expectedStatus = 200;
    rest.SetResponseBodyStream(expectedStatus,true,fileStream);

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

    //  When successful, Dropbox responds with a 200 response 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;
    }

    //  Information about the downloaded file is also available as JSON in a response header.
    //  The "dropbox-api-result" response header contains the information.  For example:
    String apiResult = rest.responseHdrByName("dropbox-api-result");
    System.out.println(apiResult);

    //  In this case, the pretty-formatted dropbox-api-result JSON looks like this:
    //  {
    //    "name": "hamlet.xml",
    //    "path_lower": "/homework/lit/hamlet.xml",
    //    "path_display": "/Homework/lit/hamlet.xml",
    //    "id": "id:74FkdeNuyKAAAAAAAAAAAQ",
    //    "client_modified": "2016-06-02T23:19:00Z",
    //    "server_modified": "2016-06-02T23:19:00Z",
    //    "rev": "9482db15f",
    //    "size": 279658
    //  }

    //  Load the JSON, pretty-print it, and demonstrate how to get some values...
    CkJsonObject jsonResult = new CkJsonObject();
    jsonResult.put_EmitCompact(false);
    jsonResult.Load(apiResult);
    //  Show the JSON pretty-printed...
    System.out.println(jsonResult.emit());

    //  Sample code to get data from the JSON response:
    int size = jsonResult.IntOf("size");
    System.out.println("size = " + size);

    String rev = jsonResult.stringOf("rev");
    System.out.println("rev = " + rev);

    String clientModified = jsonResult.stringOf("client_modified");
    CkDateTime ckdt = new CkDateTime();
    ckdt.SetFromTimestamp(clientModified);
    boolean bLocalTime = true;
    CkDtObj dt = ckdt.GetDtObj(bLocalTime);
    System.out.println(dt.get_Day() + "/" + dt.get_Month() + "/" + dt.get_Year() + " " + dt.get_Hour() + ":"
         + dt.get_Minute());


  }
}

 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.