Html Websocket

用来测试Websocket的时候，写了一个测试的Html demo

可以发送文本，文件（这里用的是图片文件，input 选择图片，然后回显，再将其转为Base64，然后传递一个json的字符串）

 

<!DOCTYPE html>
<title>WebSocket</title>
<h2>HTML Websocket Client</h2>

<body>
    <button onclick="connectSocketFun()">连接websocket</button><br><br>
    <button onclick="disconnectSocketFun()">断开连接</button><br><br>
    <input type="text" name="firstname" value="发送的数据">
    <br><br>
    <button onclick="sendTextFun()">发送文本</button><br><br>
    <div>
        <span>
            <span></span>
            <input type="file" onchange="handleFiles(this.files)">
        </span>
    </div>
    <div class="addBorder" id="imgDiv">
        <img id="imgContent" style="height: 300px;width: 300px;">
    </div><br>
    <button onclick="sendFileFun()">发送文件</button><br><br>
    <div id="output"></div>
</body>
<script>
    var ws = null;
    var base64 = '';
    function handleFiles(files) {
        if (files.length) {
            let file = files[0];
            let reader = new FileReader();
            reader.onload = function () {
                var decu =  document.getElementById('imgContent');
                decu.src = this.result;
                base64 = this.result;
            };
            reader.readAsDataURL(file);
        }
    }
    function connectSocketFun() {
        alert("连接websocket");
        ws = new WebSocket("ws://localhost:8080/hello");
        console.log(ws.readyState);
        ws.onopen = function (e) {
            log("Connected");
        }
        ws.onclose = function (e) {
            log("Disconnected: " + e.reason);
        }
        ws.onerror = function (e) {
            log("Error ");
        }
        ws.onmessage = function (e) {
            log("Message received: " + e.data);
        }
        console.log(ws.readyState);
    }
    function disconnectSocketFun() {
        ws.close();
        alert("断开连接websocket");
    }
    function sendTextFun() {
        ws.send("发送文本");
        alert("发送文本");
    }
    function sendFileFun() {
        var data = {
            name: 'test文件名',
            base64: base64
        }
        var dataJson = JSON.stringify(data);
        ws.send(dataJson);
        alert("发送文件");
    }
    function log(s) {
        var p = document.createElement("p");
        p.style.wordWrap = "break-word";
        p.textContent = s;
        output.appendChild(p);
    }
</script>

</html>

　　

posted @ 2022-02-07 15:44  人间春风意  阅读(353)  评论(0)    收藏  举报