JavaPowUpload is easy client-side solution that can be used to perform file uploads from a user machine to the server and file downloads from server to user mashine.

JavaPowUpload is a crossplatform component that runs on any OS (Windows, Linux, Mac, etc) where Java Runtime Environment is installed. JavaPowUpload supports any standard file processing script on server side.

In a pure-HTML solution, client files can be uploaded to the server via a multipart/form-data form with one or more <INPUT TYPE=FILE> items on it. However, the form-based approach has the following limitation:

• The "Choose File" dialog shown by a browser does not allow multiple selections.
• To upload multiple files at once, the HTML form must contain multiple <INPUT TYPE=FILE> boxes, and each file must be selected individually.
• An entire folder cannot be selected for uploading.
• There is no way to specify file filters to be displayed in the Files of Type box of the "Choose File" dialog.
• There is no way to put a limit on the type, size and number of files being uploaded before an upload begins.
• File date information cannot be preserved.
• There is no progress state information while upload.

In a pure-HTML solution, user can download files from server by clicking on <a href=""> link. However, this method has the following limitation:

• User should click on each link to save file.
• Each time when user download files, destination folder should be selected (depends on download software).

Java upload applet JavaPowUpload features:

• Multiple file selection at once by Ctrl, Shift keys or by Ctrl+A hot key.
• Recursive folders selection.
• Drag-n-drop files and folders.
• Rich progress and status information during the upload process.
• Uploads Form text items at the same request by POST or GET method.
• Sends selected paths info. This allows to recreate directory structure at server as it user selected.
• File filters by extension in the "Browse Files" dialog.
• Limit the maximum allowed size of individual files.
• Limit the maximum allowed total size of files.
• Limit the maximum allowed number of files to be uploaded at the same time.
• Possibility to cancel an upload (download) anytime.
• Returns http server reply with errors or success upload confirmation.
• Access to files date modified, name, size information. This data accessible before upload and also can be uploaded with files to the server.
• Multilingual interface.
• Interface can be fully hidden and replaced with custom HTML and Java Script code. Control has reach properties, methods and events.
• Supports SSL (HTTPS).
• Supports Authentication (Basic, Windows integrated).
• Supports Cookies and Session. JavaPowUpload automaticaly sends all Cookies and SessionID cookie that has web page containing it.
• Supports Proxy Servers. Proxy server settings should be configured inside JavaPowUpload.
• Supports Unicode file names, text Form items, localized messages and captions.
• Supports following protocols: HTTP, HTTPS, FTP.
• Upload and download mode in one component.

Java upload applet JavaPowUpload system requirements:

User's side:

• Any browser.
• Any OS.
• Java Runtime Environment version > 1.5.0.

Server's side:

• Any OS and web server.
• Standard script which receives files on server. ASP, ASP.NET, PHP, Perl, JSP examples are included.