s
Posts: 23
Nickname: codemonkey
Registered: Nov, 2003
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Re: Client to Browser Communication
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Posted: Nov 5, 2003 12:34 PM
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heres how we do it from java apps... of course applets are
a simple matter of calling the AppletContext showDocument
method ....of course you are limited to talking to the server from which the applet was served...Hope that helped
a little ...
/**
* A simple, static class to display a URL in the system browser.
*
* Under Unix, the system browser is hard-coded to be 'netscape'.
* Netscape must be in your PATH for this to work. This has been
* tested with the following platforms: AIX, HP-UX and Solaris.
*
* Under Windows, this will bring up the default browser under windows,
* usually either Netscape or Microsoft IE. The default browser is
* determined by the OS. This has been tested under Windows 95/98/NT.
*
* Examples:
* BrowserControl.displayURL("http://www.javaworld.com")
* BrowserControl.displayURL("file://c:\\docs\\index.html")
* BrowserContorl.displayURL("file:///user/joe/index.html");
*
* Note - you must include the url type -- either "http://" or
* "file://".
*
* This class was taken from
* http://www.javaworld.com/javaworld/javatips/jw-javatip66.html article
* written by Steven Spencer
*
*/
public class BrowserControl
{
// Used to identify the windows platform.
private static final String WIN_ID = "Windows";
// The command for launching a browser in Windows
private static final String WIN_CMD = "cmd /c start";
// The browser to display a url. Should be iexplore or netscape
private static final String WIN_BROWSER = "iexplore";
// The default browser under unix.
private static final String UNIX_PATH = "netscape";
// The flag to display a url.
private static final String UNIX_FLAG = "-remote openURL";
/**
* Display a file in the system browser. If you want to display a
* file, you must include the absolute path name.
*
* @param url the file's url which must start with either "http://" or
* "file://".
*/
public static void displayURL(String url){
boolean windows = isWindowsPlatform();
String cmd = null;
try {
if(windows){
// used to be cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
cmd = WIN_CMD + " " + WIN_BROWSER + " \"" + url + "\"";
Process p = Runtime.getRuntime().exec(cmd);
}
else{
// Under Unix, Netscape has to be running for the "-remote"
// command to work. So, we try sending the command and
// check for an exit value. If the exit command is 0,
// it worked, otherwise we need to start the browser.
// cmd = 'netscape -remote openURL(http://www.javaworld.com)'
// cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + url + ")";
cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + url + ",new-window)";
Process p = Runtime.getRuntime().exec(cmd);
try {
// wait for exit code -- if it's 0, command worked,
// otherwise we need to start the browser up.
int exitCode = p.waitFor();
if (exitCode != 0){
// Command failed, start up the browser
// cmd = 'netscape http://www.javaworld.com'
cmd = UNIX_PATH + " " + url;
p = Runtime.getRuntime().exec(cmd);
}
}
catch(InterruptedException x){
Debug.println("Error bringing up browser, cmd='" +
cmd + "'");
Debug.println("Caught: " + x);
}
}
}
catch(IOException x){
// couldn't exec browser
Debug.println("Could not invoke browser, command=" + cmd);
Debug.println("Caught: " + x);
}
}
/**
* Try to determine whether this application is running under Windows
* or some other platform by examing the "os.name" property.
*
* @return true if this application is running under a Windows OS
*/
private static boolean isWindowsPlatform()
{
boolean isWindows = false;
String os = System.getProperty("os.name");
isWindows = os != null && os.startsWith(WIN_ID);
return isWindows;
}
/**
* Simple example.
*/
public static void main(String[] args)
{
displayURL("http://www.javaworld.com");
}
}
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