📄 webserveraglet.java
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/*
* @(#)WebServerAglet.java
*
* 03L7246 (c) Copyright IBM Corp. 1996, 1998
*
* The program is provided "as is" without any warranty express or
* implied, including the warranty of non-infringement and the implied
* warranties of merchantibility and fitness for a particular purpose.
* IBM will not be liable for any damages suffered by you as a result
* of using the Program. In no event will IBM be liable for any
* special, indirect or consequential damages or lost profits even if
* IBM has been advised of the possibility of their occurrence. IBM
* will not be liable for any third party claims against you.
*/
package examples.http;
import com.ibm.aglet.*;
import com.ibm.awb.misc.Encoding;
import java.io.*;
import java.net.URL;
import java.util.Enumeration;
/**
* WebServerAglet is an aglet which behaves like WebServer.
* Please enable the HTTP messaging feature in the configuration panel
* Options -> Network Cofiguration -> Others.
* If the aglet is successfully created, please try
* <pre>
* http://aglet.server:434/aglets/default/test/index.html
* </pre>
* in your web browser. The port number have to be same number on which
* the aglet server is running. (434 by default)
*
* @version 1.00 $Date: 1999/10/27 05:16:39 $
* @author Mitsuru Oshima
*/
public class WebServerAglet extends Aglet {
static private final Encoding ENCODING = Encoding.getDefault();
static private final String ENCODING_JAVA = ENCODING.getJavaEncoding();
static private final String CHARSET_PAGE = ENCODING.getHTMLCharset();
static private String META_TAG = null;
static {
META_TAG = "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html;";
if(CHARSET_PAGE!=null)
META_TAG += " charset="+CHARSET_PAGE;
META_TAG += "\">";
}
String indexPage = null;
public void onCreation(Object init) {
//
// this is just a convension.
//
getAgletContext().setProperty("name.test", getAgletID());
//
// Creating pages in advance.
//
indexPage();
//
// Accepts http requests concurrently.
//
getMessageManager().setPriority("index.html",
MessageManager.NOT_QUEUED);
getMessageManager().setPriority("next.html",
MessageManager.NOT_QUEUED);
}
public boolean handleMessage(Message m) {
//
// This is just a temporary solution.
//
Object o = m.getArg("cgi-response");
PrintStream p = null;
if (o != null && o instanceof OutputStream) {
OutputStream os = (OutputStream)o;
OutputStreamWriter osw = null;
try {
osw = new OutputStreamWriter(os, ENCODING_JAVA);
} catch(UnsupportedEncodingException excpt) {
osw = new OutputStreamWriter(os);
}
PrintWriter pw = new PrintWriter(osw);
return handleHttpRequest(m, pw);
}
return true;
}
//
// If it's http request.
//
boolean handleHttpRequest(Message m, PrintWriter p) {
System.out.println(m);
if (m.sameKind("index.html") || m.sameKind("")) {
p.println(indexPage);
p.flush();
} else if (m.sameKind("next.html")) {
p.println("<HTML>");
p.println("<HEAD>");
p.println(META_TAG);
p.println("<TITLE>");
p.println("NEXT");
p.println("</TITLE>");
p.println("</HEAD>");
p.println("<BODY>");
p.println("<H1> Here is a list of proxies in <TT>" +
getAgletContext().getHostingURL() + "</TT></H1>");
Enumeration e =
getAgletContext().getAgletProxies(ACTIVE|INACTIVE);
p.println("<PRE>");
while(e.hasMoreElements()) {
AgletProxy proxy = (AgletProxy) e.nextElement();
try {
p.println( proxy.getAgletInfo().toString() );
} catch (Exception ex) {
ex.printStackTrace(p);
}
}
p.println("</PRE>");
p.println("</BODY>");
p.println("</HTML>");
p.flush();
m.sendReply("text/html");
} else if (m.sameKind("go")) {
System.out.println( (String)m.getArg("location") );
String l = (String)m.getArg("location");
if (l.startsWith("atp:")) {
l = l.substring(4);
if (l.indexOf(':')<0) {
p.println("<HTML>");
p.println("<HEAD>");
p.println(META_TAG);
p.println("<TITLE>");
p.println("ILLEGAL INPUT");
p.println("</TITLE>");
p.println("</HEAD>");
p.println("<BODY>");
p.println("<H1>");
p.println("Please specify port number. default = 434");
p.println("</H1>");
p.println("</BODY>");
p.println("</HTML>");
p.flush();
m.sendReply("text/html");
return true;
}
}
try {
p.println("<HTML>");
p.println("<HEAD>");
p.println(META_TAG);
p.println("<TITLE>");
p.println("MOVING TO");
p.println("</TITLE>");
p.println("</HEAD>");
p.println("<BODY>");
p.println("<H1> Moving to...! </H1>");
String contextName = getAgletContext().getName();
if (contextName.equals("")) {
contextName = "default";
}
p.println("<a href= \"http:" + l + "/aglets/" +
contextName + "/" + getAgletID() +"/index.html\" TARGET=_top> atp:" + l + " </a>");
p.println("Click above link to trace me! <BR>");
p.println("</BODY>");
p.println("</HTML>");
p.flush();
m.sendReply("text/html");
dispatch(new java.net.URL("atp:" + l));
} catch (IOException ex) {
ex.printStackTrace();
} catch (RequestRefusedException ex) {
ex.printStackTrace();
}
} else
return false;
return true;
}
/*
* index page
*/
void indexPage() {
StringBuffer b = new StringBuffer();
b.append("<HTML>");
b.append("<HEAD>");
b.append(META_TAG);
b.append("<TITLE>");
b.append("CGI TEST");
b.append("</TITLE>");
b.append("</HEAD>");
b.append("<BODY>");
b.append("<H1> Welcome to WebServerAglet! </H1>");
b.append("<a href=next.html> List Proxies </a> <BR>");
b.append("<FORM METHOD=GET ACTION=go>");
b.append("<INPUT NAME=location VALUE=\"atp://your.host\">");
b.append("<INPUT TYPE=submit VALUE=GO!> <BR>");
b.append("<P><FONT color=#FF0000>note:</FONT> Check box ");
b.append("for \"Accept HTTP Request as a message\"<BR>");
b.append("in \"Network Preference\" of target server <B>must be checked</B>.");
b.append("</BODY>");
b.append("</HTML>");
indexPage = b.toString();
}
}
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