Solaris Java Plug-in User's Guide

Chapter 6 Protocol Support

HTTP, FTP and Gopher

Java Plug-in supports HTTP, FTP, and GOPHER protocols, including built-in proxy configuration support.



Prior to version 1.4 of the Java 2 Platform, Standard Edition, Java Plug-in supported HTTPS through browser-dependent native APIs. JavaTM Secure Socket Extension (JSEE) is a new Java extension in 1.4, providing a Java implementation of SSL and HTTPS for the Java platform. Java Plug-in in 1.4 leverages JSSE to provide HTTPS support, instead of relying on the browser.

This provides the following advantages over using browser-dependent native APIs for support:

Java Plug-in supports HTTPS through JSSE for Win32, Linux and the Solaris operating environment.

Proxy and Cookie Support

A different proxy configuration may be used for every HTTPS connection. Java Plug-in provides full proxy configuration support in HTTPS. Proxy configuration may be set through user preference in the browser, as well as the Java Plug-in Control Panel. Direct, manual and automatic proxy configuration are supported.

Cookies may be sent/received for every HTTPS connection. Java Plug-in provides full cookie support, automatically retrieving or updating cookies through the browser cookie store.

Error handling support

When accessing an HTTPS server, errors may occur. Java Plug-in has hooked into JSSE to provide the following types of error handling:

Potential issues with HTTPS through JSSE

Although support of HTTPS through JSSE eliminates many browser-specific problems, there are several issues that developers should be aware of:


Java Plug-in currently supports SOCKS version 4.

Note –

For HTTP/HTTPS, a SOCKS proxy server may be used with a web proxy server to add caching. The behavior, however, may differ from that observed when running a similar configuration in a browser without Java Plug-in.