Java - Website Html extracting using Socket

Question

The code below doesn't get any html from the url

URL url = new URL("https://google.com");
        Socket socket = new Socket(url.getHost(),443);
        socket.setSoTimeout(15000);
        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(),"UTF-8"));
        String c = "";
        while((c = reader.readLine())!=null)
        {
            System.out.print(c);
        }
        reader.close();
        socket.close();

I'm aware of URLConnection method openConnection() and URL class method openStream() but i don't want to use those. All i want to know is why i don't get any input using Socket class but i do get an input using other approaches.

yole · Accepted Answer · 2018-03-24 15:35:01Z

2

You're not sending any request. HTTP is a request-response protocol: you need to send a request telling the Web server which URL you want to retrieve, and then it will send you the data for this URL.

answered Mar 24, 2018 at 15:35

yole

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3 Comments

parsa Over a year ago

how can i do that using socket?

Cardinal System Over a year ago

@parsa lookie here: stackoverflow.com/questions/32086560/…

yole Over a year ago

Learn about how the HTTP protocol works, find out the format of the request, and send that request through the socket. (Also you probably want to send HTTP requests to port 80, not HTTPS requests to port 443, because implementing a HTTPS handshake over raw sockets is rather non-trivial.)

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