Upload Files to Web Server

Demonstrates how to upload files from an application to a web server. Note: There must be something provided on the server-side to consume the upload. It could be an ASP or ASP.NET script, Perl, C++ CGI, PHP, Ruby, etc,. However, uploading via HTTP is not the same as uploading via FTP where the FTP server handles receiving the file and saving to disk.

The C# code behind http://www.chilkatsoft.com/receiveUpload.aspx may be found at this URL: C# to Receive Upload in ASP.NET.

Download Chilkat Java Library

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[])
  {
    boolean success;
    CkHttp http = new CkHttp();

    //  Any string unlocks the component for the 1st 30-days.
    success = http.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(http.lastErrorText());
        return;
    }

    //  Build a HTTP request with the files to be uploaded:
    CkHttpRequest req = new CkHttpRequest();
    req.UseUpload();

    //  The URL we'll be posting to is:
    //  http://www.chilkatsoft.com/receiveUpload.aspx
    //  Therefore, the path part of the URL is:
    req.put_Path("/receiveUpload.aspx");

    //  Note: You may test uploads to this URL, but anything over 80K will be aborted on the receiving side.

    //  Add some files to the request:
    //  The 1st argument is an arbitrary name.  It's the POST form field name.
    //  The 2nd argument is the filename currently existing on
    //  the local filesystem.  It may include an absolute or relative
    //  path, or no path at all if it's in the current working directory.
    success = req.AddFileForUpload("file1","hamlet.xml");
    if (success != true) {
        System.out.println(req.lastErrorText());
        return;
    }

    success = req.AddFileForUpload("file2","dude.gif");
    if (success != true) {
        System.out.println(req.lastErrorText());
        return;
    }

    //  Send the HTTP POST and get the response.  Note: This is a blocking call.
    //  The method does not return until the full HTTP response is received.
    String domain;
    int port;
    boolean ssl;
    domain = "www.chilkatsoft.com";
    port = 80;
    ssl = false;
    CkHttpResponse resp;
    resp = http.SynchronousRequest(domain,port,ssl,req);
    if (resp == null ) {
        System.out.println(http.lastErrorText());
    }
    else {
        //  Display the HTML source of the page returned.
        System.out.println(resp.bodyStr());
    }

  }
}