InterPcCommunication/WebClient.html at master · Childcity/InterPcCommunication · GitHub

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<html>
    <head>
        <title>Browser Client</title>
    </head>
    <body>
        <h1>Browser Client</h1>
        <p>
            <input type="text" id="serverUrl" onkeydown="if(event.keyCode==13)initWebSocket();" value="ws://127.0.0.1:4322" />
            <button onClick="initWebSocket();">Connect</button>
            <button onClick="stopWebSocket();">Disconnect</button>
            <button onClick="checkSocket();">State</button>
        </p>
        <p>
            <textarea id="debugTextArea" style="width:400px;height:200px;"></textarea>
        </p>
        <p style="display:flex;justify-content:flex-start">
            <textarea type="text" id="inputText" style="width:350px;height:50px;" onkeydown="if(event.keyCode==13)sendMessage();"></textarea>
            <button onClick="sendMessage();">Send</button>
        </p>
        <div style="display:flex;justify-content:space-between;border-style:solid;padding:5px;width:390px;">
            <div>
                <label for="isSpeedTest">Speed Test</label>
                <input type="checkbox" id="isSpeedTest" checked="checked">
            </div>
            <div>
                <input type="number" id="mbNum" min="1" max="1000" step="10" value="10">
                <label for="mbNum">Mb</label>
                <button onClick="sendArray();">Send</button>
            </div>
        </div>

        <script id="worker1" type="javascript/worker">
            // This script for background Worker, that build buffer for Speed Test
            // This script won't be parsed by JS engines because its type is javascript/worker.
            self.onmessage = function(msg) {
                try{
                    const len = msg.data[0] * 1048576;
                    let buff = new Uint8Array(len);
                    buff.fill("F".charCodeAt(0));
                    buff[0] = "S".charCodeAt(0); buff[buff.length - 1] = "E".charCodeAt(0);
                    console.log(buff.length);
                    //console.log("bytes sent :", '"' + buff[0] + " ... " + buff[buff.length - 1] + '"');
                    self.postMessage(buff);
                } catch(err) {
                    self.postMessage(err);
                }
            };
        </script>

        <script type="text/javascript">
            const testStartCharCode = "S".charCodeAt(0);
            const testEndCharCode = "E".charCodeAt(0);
            let totalBytesNum = 0;
            let testStartedAt = null;

            let debugTextArea = document.getElementById("debugTextArea");

            function debug(message) {
                debugTextArea.value += "DEBUG: " + message + "\n";
                debugTextArea.scrollTop = debugTextArea.scrollHeight;
            }

            function sendMessage() {
                var msg = document.getElementById("inputText").value;
                if (websocket != null) {
                    document.getElementById("inputText").value = "";
                    let buff = new ArrayBuffer(msg.length * 2); // 2 bytes for each char
                    let bufView = new Uint8Array(buff);
                    for (let i = 0, strLen = msg.length; i < strLen; i++) {
                        bufView[i] = msg.charCodeAt(i);
                    }
                    websocket.send(buff);
                    console.log("string sent :", '"' + buff + '"');
                }
            }

            function sendArray() {
                const mbNum = document.getElementById("mbNum").value;
                if (websocket != null) {
                    var blob = new Blob([
                        document.querySelector('#worker1').textContent
                    ], { type: "text/javascript" });

                    // Note: only in Chrome 10+.
                    var worker = new Worker(window.URL.createObjectURL(blob));
                    worker.onmessage = function (e) {
                        //console.log("Received: " + e.data);
                        if (e instanceof Error) {
                            alert(e.message);
                            return;
                        }
                        websocket.send(e.data.buffer);
                        e.data = undefined;
                    }
                    worker.postMessage([mbNum]); // Start the worker asynchronously.
                }
            }

            var websocket = null;

            function initWebSocket() {
                try {
                    if (typeof MozWebSocket == 'function')
                        WebSocket = MozWebSocket;

                    if (websocket && websocket.readyState == 1)
                        websocket.close();

                    var wsUri = document.getElementById("serverUrl").value;
                    websocket = new WebSocket(wsUri);
                    websocket.binaryType = "arraybuffer";

                    websocket.onopen = function (evt) {
                        debug("CONNECTED");
                    };

                    websocket.onclose = function (evt) {
                        debug("DISCONNECTED");
                    };

                    websocket.onmessage = function (evt) {
                        let msg = "";
                        if (evt.data instanceof ArrayBuffer) {
                            const byteArray = new Uint8Array(evt.data);
                            const isSpeedTest = document.getElementById("isSpeedTest").checked;

                            if (!isSpeedTest) { // This is a simple text msg
                                const enc = new TextDecoder("utf-8");
                                msg = enc.decode(byteArray);
                            } else { // This is a speed test (test will be > 20 byte)
                                totalBytesNum += byteArray.byteLength;

                                if (byteArray[0] === testStartCharCode) { // Start of speed test
                                    testStartedAt = Date.now();
                                }

                                //debug("last: " + byteArray[byteArray.byteLength - 1]);
                                if (byteArray[byteArray.byteLength - 1] === testEndCharCode) { // End of speed test
                                    const elapsed = Date.now() - testStartedAt;
                                    const mbS = (totalBytesNum / 1048576.0) / (elapsed / 1000.0);
                                    msg = "Total received: " + totalBytesNum
                                        + " (~" + parseFloat(totalBytesNum / 1048576.0.toFixed(2)) + " MB)\n"
                                        + "Time: " + elapsed / 1000.0 + "s (" + elapsed + " ms)\n"
                                        + "Speed: " + parseFloat(mbS.toFixed(2)) + " MB/s  ==  "
                                        + parseFloat((mbS * 8).toFixed(2)) + " Mbit/s\n\n";
                                    testStartedAt = null;
                                    totalBytesNum = 0;
                                }
                                //msg = " " + " " + evt.data.byteLength;
                            }
                        } else {
                            msg = evt.data;
                        }

                        debugTextArea.value += msg;
                        debugTextArea.scrollTop = debugTextArea.scrollHeight;
                    };

                    websocket.onerror = function (evt) {
                        debug('ERROR: ' + evt.data);
                    };

                } catch (exception) {
                    debug('ERROR: ' + exception);
                }
            }

            function stopWebSocket() {
                if (websocket)
                    websocket.close();
            }

            function checkSocket() {
                if (websocket != null) {
                    var stateStr;
                    switch (websocket.readyState) {
                        case 0: {
                            stateStr = "CONNECTING";
                            break;
                        }
                        case 1: {
                            stateStr = "OPEN";
                            break;
                        }
                        case 2: {
                            stateStr = "CLOSING";
                            break;
                        }
                        case 3: {
                            stateStr = "CLOSED";
                            break;
                        }
                        default: {
                            stateStr = "UNKNOW";
                            break;
                        }
                    }
                    debug("WebSocket state = " + websocket.readyState + " ( " + stateStr + " )");
                } else {
                    debug("WebSocket is null");
                }
            }
        </script>
    </body>
</html>