parallel-web-server-chatbot/index.html at master · Samee24/parallel-web-server-chatbot · GitHub

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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <script type="text/javascript">
      // Basic functionality from http://code.runnable.com/UqDMKY-VwoAMABDk/simple-websockets-chat-with-tornado-for-python
      var ws;
      var username;

      function createChatEntry(username, message) {
        var entry = document.createElement("div");
        entry.class = "chat_entry";

        var dom_uname = document.createElement("span");
        dom_uname.class = "chat_username";
        dom_uname.innerHTML = username+": ";
        entry.appendChild(dom_uname);

        var dom_msg = document.createElement("span");
        dom_msg.class = "chat_message";
        dom_msg.innerHTML = message;
        entry.appendChild(dom_msg);

        return entry;
      }

      function openWS(messageContainer) {
        ws = new WebSocket("ws://localhost:8888/chat");
        ws.onmessage = function(e) {
          var d = new Date();
          var data = JSON.parse(e.data);
          messageContainer.appendChild(createChatEntry(data.user, data.message));
          console.log(d.getTime() - data.time)
        };
        ws.onclose = function(e) {
          openWS(messageContainer);
        };
      }

      function sendMessage() {
        var d = new Date();
        var data = {
          type: "message",
          time: d.getTime(),
          user: username,
          message: document.getElementById("message").value};

        if(username && data.message) {
          ws.send(JSON.stringify(data));
        }

      }

      function sendUser(data) {
       if( ws.readyState == 1 ) {
        ws.send(JSON.stringify(data));
      } else {
        setTimeout(function() { sendUser(data); }, 1000);
      }
      event.target.value = '';
    }

    window.onload = function() {
      var messageContainer = document.getElementById("chat");
      if("WebSocket" in window) {
        messageContainer.appendChild(createChatEntry("[SYSTEM]", "WebSocket is supported by your browser!"));
        messageContainer.appendChild(createChatEntry("[SYSTEM]", "Pick a username and start sending out messages."));
        username = window.prompt("Enter your username, or leave blank if you wish to remain anonymous:");
        openWS(messageContainer);
        if( username != "" ) {
          pass = window.prompt("Enter a password to save your session:")
          data = { type: "username", user: username, password: pass };
          sendUser(data);
        } else {
          username = "Anonymous";
          data = { type: "username", user: "Anonymous",
                   password: "" };
          sendUser(data);
      }
      document.getElementById('message').onkeyup = function(event) {
        if (event.keyCode == 13) {
          // If return is pressed, send the contents of the chatbox.
          sendMessage();
          event.target.value = ''; // Clear the chat box
        }
      }
    }
    else {
      messageContainer.appendChild(createChatEntry("[SYSTEM]", "WebSocket is NOT supported by your browser!"));
    }
  }
  </script>
</head>
<body>
  <div id="chat" style="width: 100%; height: 40em; overflow: scroll; font-family: Arial"></div>
  <div id="input_area">
    <textarea id="message" placeholder="Your message" style="display: block; width: 400px"></textarea>
    <button onclick="sendMessage()" style="display: block">Send</button>
  </div>
</body>
</html>