The Basic Upload sample application included with AppletFile was carefully written to support Internet Explorer 3.02. Because of several bugs that exist in this older browser, the Upload Applet will only operate under the following restrictions:

• The cabbase parameter must reference IE3 archives
• Access must be over a normal http connection (no SSL)
• Access via a proxy server is not supported
• NTLM authentication is not supported
• TEXTAREA form elements must follow a naming convention
• The <APPLET> and <PARAM> tags must appear outside of the <FORM>

See the sections below for a complete description of these restrictions and how to deal with them. See the Basic Upload sample application for a working example of how to support IE 3.02.

The cabbase parameter must reference IE3 archives
Support for IE3 is included the IE3-specific CAB archives FileDownloadIE3.cab, FileUploadIE3.cab, and UploadProgressIE3.cab. If you are upgrading from AppletFile 1.x, you will need to modify your pages to reference the IE3-specific CAB archives. See the reference pages for each Applet for the exact tag syntax. If you do not need IE3 support, you can omit the cabbase parameter that references to the IE3-specific CAB archives. However, you still need to modify your pages to use the new cabinets parameter.

SSL is not supported
The problem related to SSL access is easier to address since the use of SSL is controlled by the server. If you must place your application on a secure server, IE 3.02 clients simply will not be able to use the Upload Applet. In this case IE 3.02 clients will automatically be sent to the page specified by the alternateUrl parameter where you can provide a simpler interface or instruct users to upgrade their browsers.

Proxy access is not supported
Dealing with proxy servers is a bit more difficult, especially for public web sites that must deal with a variety of client configurations. If clients must access your web site, IE 3.02 simply can not be used. In this case IE 3.02 clients will automatically be sent to the page specified by the alternateUrl parameter where you can provide a simpler interface or instruct users to upgrade their browsers.

NTLM authentication is not supported
AppletFile only supports NTLM authenticated uploads on IE 4.0 and higher browsers. NTLM authenticated IE 3.02 clients will automatically be sent to the page specified by the alternateUrl parameter where you can provide a simpler interface or instruct users to upgrade their browsers. If you need to supported authenticated access by IE 3.02 clients, you will need to switch to Basic authentication. This requires disabling NTLM authentication for the entire web site.

TEXTAREA elements
Because of a bug in IE 3.02, it is not possible for the Upload Applet to determine the name of TEXTAREA form elements. If you need to use TEXTAREA elements on your form, you must follow the naming convention TEXTAREAn where n represents nth TEXTAREA element starting at 1.

<APPLET> and <PARAM> tags must be located outside of the <FORM>
Because of a problem with the way IE 3.02 handles the name space of Java Applets, you must make sure that your <APPLET> and associated <PARAM> tags are located outside of the <FORM>. This will limit your form layout such that the FileList dialog must be at the very top or bottom.