SearchEngine.java

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;

class Handler implements URLHandler {
    // The one bit of state on the server: a number that will be manipulated by
    // various requests.
    int num = 0;

    public String handleRequest(URI url) {
        ArrayList<String> words = new ArrayList<String>();
        if (url.getPath().equals("/")) {
            return String.format("Jai's: %d", num);
        } else if (url.getPath().contains("/add")){
            String[] parameters = url.getQuery().split("=");
            if (parameters[0].equals("s")) {
                words.add(parameters[1]);
                return "added";
            }
        } else{
            if(url.getPath().contains("/search")){
                String[] parameters = url.getQuery().split("=");
                if (parameters[0].equals("s")) {
                    for(int i =0; i<words.size(); i++){
                        if (words.get(i).equals(parameters[1])){
                            return "success";
                        }
                    }
                }
            }

            return "404";
        }
    }
}

class SearchEngine {
    public static void main(String[] args) throws IOException {
        if(args.length == 0){
            System.out.println("Missing port number! Try any number between 1024 to 49151");
            return;
        }

        int port = Integer.parseInt(args[0]);

        Server.start(port, new Handler());
    }
}