napi/examples/java/websocket/src/main/resources/static/echo.html at ba3a27c4187330c72982a0519da15b4f9c81eb62 · nanoapi-io/napi · GitHub

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<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<!DOCTYPE html>
<html>
  <head>
    <title>Apache Tomcat WebSocket Examples: Echo</title>
    <style type="text/css">
      #connect-container {
        float: left;
        width: 400px;
      }

      #connect-container div {
        padding: 5px;
      }

      #console-container {
        float: left;
        margin-left: 15px;
        width: 400px;
      }

      #console {
        border: 1px solid #cccccc;
        border-right-color: #999999;
        border-bottom-color: #999999;
        height: 170px;
        overflow-y: scroll;
        padding: 5px;
        width: 100%;
      }

      #console p {
        padding: 0;
        margin: 0;
      }
    </style>
    <script src="http://cdn.sockjs.org/sockjs-0.3.min.js"></script>
    <script type="text/javascript">
      var ws = null;

      function setConnected(connected) {
        document.getElementById("connect").disabled = connected;
        document.getElementById("disconnect").disabled = !connected;
        document.getElementById("echo").disabled = !connected;
      }

      function connect() {
        var target = document.getElementById("target").value;
        ws = new SockJS(target);
        ws.onopen = function () {
          setConnected(true);
          log("Info: WebSocket connection opened.");
        };
        ws.onmessage = function (event) {
          log("Received: " + event.data);
        };
        ws.onclose = function () {
          setConnected(false);
          log("Info: WebSocket connection closed.");
        };
      }

      function disconnect() {
        if (ws != null) {
          ws.close();
          ws = null;
        }
        setConnected(false);
      }

      function echo() {
        if (ws != null) {
          var message = document.getElementById("message").value;
          log("Sent: " + message);
          ws.send(message);
        } else {
          alert(
            "WebSocket connection not established, please connect.",
          );
        }
      }

      function log(message) {
        var console = document.getElementById("console");
        var p = document.createElement("p");
        p.style.wordWrap = "break-word";
        p.appendChild(document.createTextNode(message));
        console.appendChild(p);
        while (console.childNodes.length > 25) {
          console.removeChild(console.firstChild);
        }
        console.scrollTop = console.scrollHeight;
      }
    </script>
  </head>
  <body>
    <noscript><h2 style="color: #ff0000">
        Seems your browser doesn't support Javascript! Websockets rely on
        Javascript being enabled. Please enable Javascript and reload this page!
      </h2></noscript>
    <div>
      <div id="connect-container">
        <div>
          <input
            id="target"
            type="text"
            size="40"
            style="width: 350px"
            value="/echo"
          />
        </div>
        <div>
          <button id="connect" onclick="connect();">Connect</button>
          <button id="disconnect" disabled="disabled" onclick="disconnect();">
            Disconnect
          </button>
        </div>
        <div>
          <textarea id="message" style="width: 350px"
          >Here is a message!</textarea>
        </div>
        <div>
          <button id="echo" onclick="echo();" disabled="disabled">
            Echo message
          </button>
        </div>
      </div>
      <div id="console-container">
        <div id="console"></div>
      </div>
    </div>
  </body>
</html>