Attempting to open a HTTPS: URL in an application with the default
URLStreamHandler will result in the following error message being
generated:
java.net.MalformedURLException: unknown protocol: https
at java/net/URL.<init> (URL.java)
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The default URLStreamHandler for applications does not have the ability to
access a URL via the HTTPS: protocol.
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The com.ms.net.wininet.WininetStreamHandlerFactory class can be used to
allow applications to access an HTTPS: URL. In an application, you can set
the URLStreamHandlerFactory using the following command:
java.net.URL.setURLStreamHandlerFactory(
new com.ms.net.wininet.WininetStreamHandlerFactory());
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This behavior is by design.
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The following Sample code demonstrates how to use the
WininetStreamHandlerFactory in a Java application. You should change the
line 'String page="..."' to point to a valid HTTPS Web server.
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Sample Code
import java.net.*;
import java.io.*;
public class HTTPS
{
public static void main(String args[]) {
/*
Install a URLStreamHandler that can handle the HTTPS: protocol.
*/
try {
if (Class.forName(
"com.ms.net.wininet.WininetStreamHandlerFactory" )!=null)
URL.setURLStreamHandlerFactory(new
com.ms.net.wininet.WininetStreamHandlerFactory());
} catch (ClassNotFoundException ex) {
System.err.println(
"Warning: WininetStreamHandlerFactory class not found.");
}
try {
/*
The following line assumes that you have a HTTPS: server on your
local machine, with a Login.ASP page in the root directory. You
can replace the following line with any valid HTTPS: URL.
*/
String page="https://localhost/Login.asp";
URL url=new URL(page);
URLConnection connection=url.openConnection();
connection.setAllowUserInteraction(true);
DataInputStream dis=new DataInputStream(
connection.getInputStream());
String input;
do {
input=dis.readLine();
if (input!=null)
System.out.println(input);
} while (input!=null);
dis.close();
} catch (IOException ex) {
System.err.println("IOException, make sure the URL is valid.");
ex.printStackTrace();
}
}
}
(c) Microsoft Corporation 1998, All Rights Reserved. Contributions by Derek
Jamison, Microsoft Corporation
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