Mega Code Archive
Call a servlet from a Java command line application
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import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
public class CounterApp {
String servletURL;
String sessionCookie = null;
public static void main(String args[]) {
if (args.length == 0) {
System.out.println("\nServlet URL must be specified");
return;
}
try {
CounterApp app = new CounterApp(args[0]);
for (int i = 1; i <= 5; i++) {
int count = app.getCount();
System.out.println("Pass " + i + " count=" + count);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
public CounterApp(String url) {
servletURL = url;
}
public int getCount() throws Exception {
java.net.URL url = new java.net.URL(servletURL);
java.net.URLConnection con = url.openConnection();
if (sessionCookie != null) {
con.setRequestProperty("cookie", sessionCookie);
}
con.setUseCaches(false);
con.setDoOutput(true);
con.setDoInput(true);
ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(byteOut);
out.flush();
byte buf[] = byteOut.toByteArray();
con.setRequestProperty("Content-type", "application/octet-stream");
con.setRequestProperty("Content-length", "" + buf.length);
DataOutputStream dataOut = new DataOutputStream(con.getOutputStream());
dataOut.write(buf);
dataOut.flush();
dataOut.close();
DataInputStream in = new DataInputStream(con.getInputStream());
int count = in.readInt();
in.close();
if (sessionCookie == null) {
String cookie = con.getHeaderField("set-cookie");
if (cookie != null) {
sessionCookie = parseCookie(cookie);
System.out.println("Setting session ID=" + sessionCookie);
}
}
return count;
}
public String parseCookie(String raw) {
String c = raw;
if (raw != null) {
int endIndex = raw.indexOf(";");
if (endIndex >= 0) {
c = raw.substring(0, endIndex);
}
}
return c;
}
}
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