lab2.md

Part 1: StringServer

my code for StringServer, based very heavily off the given NumberServer file:

class Handler implements URLHandler {
    
    ArrayList<String> strings = new ArrayList<>();

    String words = "";
    public String handleRequest(URI url) {
        if (url.getPath().equals("/")) {
            return  words;
        } else {
            if (url.getPath().contains("/add-message")) {
                String[] parameters = url.getQuery().split("=");
                if (parameters[0].equals("s")) {
                    strings.add(parameters[1]);
                    words += strings.size() + ". " + parameters[1] + "\n";
                    return words;
                }
            }
            return "404 Not Found!";
        }
    }
}

class StringServer {
    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());
    }
}

for the following exercises, i used EdStem because i 1) didn't want to figure out the ucsd vpn thing and 2) ssh... doesn't work on my home pc?? anyways.

1. adding 'hello'

the method called in my code was the only method that isn't the main method: the handleRequest method in URLHandler. the argument to that method was the url that the browser passed to my server, and the only field of the class, an ArrayList called strings started out empty before the request. after this request, I added a string containing the message hello to strings.

2. adding 'how are you'

so, unexpected result. maybe a result of using firefox? who knows. handleRequest was called again to handle the request, and the contents of strings up to this point is just {"hello"}. probably due to how my browser processes URLs, the server didn't actually receive "how are you", but rather "how+are+you" as the message part of the query. therefore, the content of strings after the request would be {"hello", "how+are+you"}.

3. adding 'how are you' (part 2, electric boogaloo)

after a bit of cursory googling, i went and replaced all of my spaces with %C2%A0. not sure why it works, but it does?

Part 2: ssh (but cooler???)

private key path: /home/yuehua/.ssh/id_rsa.pub
public key path: /home/linux/ieng6/cs15lfa23/cs15lfa23hg/.ssh/authorized_keys

Part 3: in summary, there is no intellectual curiosity in this noggin of mine

I didn't know there was a way to automatically log in when ssh-ing. It makes sense, since constantly sending passwords back and forth doesn't sound like good security, and on an intellectual level I guess I would've been more surprised to learn that there wasn't a way to automatically log in, but I just didn't know or bother to find out.