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import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.GenericServlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class ServerSnoop extends GenericServlet {
public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
res.setContentType("text/plain");
PrintWriter out = res.getWriter();
ServletContext context = getServletContext();
out.println("req.getServerName(): " + req.getServerName());
out.println("req.getServerPort(): " + req.getServerPort());
out.println("context.getServerInfo(): " + context.getServerInfo());
out.println("getServerInfo() name: " + getServerInfoName(context.getServerInfo()));
out.println("getServerInfo() version: " + getServerInfoVersion(context.getServerInfo()));
out.println("context.getAttributeNames():");
Enumeration e = context.getAttributeNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
out.println(" context.getAttribute(\"" + name + "\"): " + context.getAttribute(name));
}
}
private String getServerInfoName(String serverInfo) {
int slash = serverInfo.indexOf('/');
if (slash == -1)
return serverInfo;
else
return serverInfo.substring(0, slash);
}
private String getServerInfoVersion(String serverInfo) {
// Version info is everything between the slash and the space
int slash = serverInfo.indexOf('/');
if (slash == -1)
return null;
int space = serverInfo.indexOf(' ', slash);
if (space == -1)
space = serverInfo.length();
return serverInfo.substring(slash + 1, space);
}
}
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