Qt-based LiveConnect Plugins for Netscape and Explorer

The Qt-based Netscape Plugin software makes it easy to write plugins such that they can be used on both Unix/Linux and Windows/95/NT, in the Netscape and MS-Explorer, and any other WWW browser supporting the same protocol.


  1. Download the Plugin SDK from Netscape, and copy the following files from there to $QTDIR/extensions/nsplugin/src :
    • common/npwin.cpp
    • common/npunix.c
    • include/npapi.h
    • include/npupp.h
    • include/jri.h
    • include/jri_md.h
    • include/jritypes.h
  2. Build the Netscape Plugin extension library, found in the extensions/nsplugin/src directory of your Qt distribution. This produces a static library to be linked with your plugin code.
  3. Read the plugin class documentation, and examine the example plugins.
  4. Do most of your development as a stand-alone Qt application - debugging Netscape Plugins is cumbersome. You may want to use signal(2) in your plugin to enable core-dumps if your browser disables them.
  5. Note the platform-specific build steps below.
  6. Read about the raw plugin interface in Netscape's handbook.
  7. If files viewed by a plugin are provided by an HTTP server (using a http://... URL) then the server must be configured to send the correct MIME type for the file, such as by editing the mime.types file of Apache. If the files are viewed via a file://... URL, then the browser will use the filename extension to decide the file type (and hence the plugin to load) - the user may need to set the filename extension in the Helpers or Applications section of their browser preferences.

We are working on streamlining the build process for Qt-based Netscape Plugins.

Building under X11

Building under Windows

Known Bugs

The Qt-based LiveConnect Plugin binding code has a number of minor bugs, but is sufficiently stable for most production applications. All of these have known solutions which we are working to implement.

Copyright 1999 Troll TechTrademarks
Qt version 2.0.2