import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.MalformedURLException;
public class UrlRetriever {
public static void main(String[] args) {
if (args.length != 1) {
System.err.println("Usage: UrlRetriever URL");
System.exit(1);
}
URL url = null;
try {
// Make a request to the specified URL
url = new URL(args[0]);
} catch (MalformedURLException e) {
System.err.println("Invalid URL: " + e);
System.exit(1);
}
HttpURLConnection connection = null;
try {
connection = (HttpURLConnection)url.openConnection();
} catch (ClassCastException e) {
System.err.println("Specified protocol is not HTTP");
System.exit(1);
} catch (IOException e) {
System.err.println("Connection error: " + e);
System.exit(1);
}
try {
connection.setRequestMethod("GET");
// Get the response from the server
int status = connection.getResponseCode();
BufferedReader in = new BufferedReader(
new InputStreamReader(connection.getInputStream()));
int c;
StringBuilder content = new StringBuilder();
while ((c = in.read()) != -1) {
content.append((char)c);
}
in.close();
// Print the response
System.out.println(content.toString());
} catch (IOException e) {
e.printStackTrace();
}
}
}