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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Resumable Upload Client Code</title>
    <script src="https://unpkg.com/spark-md5@^3.0.0/spark-md5.min.js"></script>
    <!--<script src="node_modules/spark-md5/spark-md5.min.js"></script>-->
    <script src="resumableUpload.js"></script>
</head>
<body>
<h1>Resumable Upload Client Code</h1>
URL: <input type="url" id="urlInput" value="http://example.com/"/>
<br>
<input type="file" id="fileInput" />
<br>
Position in file to start: <input type="number" id="startPosInput" min="0" step="10000" value="100000" list="defaultNumbers">
<datalist id="defaultNumbers">
    <option value="0">
    <option value="10000">
    <option value="100000">
    <option value="1000000">
    <option value="10000000">
    <option value="1000000000">
</datalist>
<p>Use the network tab of the debugger to see that the request only contains the last part of the file.</p>

<p>Use the same host (default URL) to see the `X-Content-Range` and `X-MD5` headers.</p>

<p>Request <b>will fail</b> unless server accepts cross-origin posts to the URL.</p>
<br>
</body>
</html>

            
          
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              document.addEventListener("DOMContentLoaded", function(event) {
    let urlInput = document.getElementById('urlInput');
    urlInput.value = location.origin + '/';

    let fileInput = document.getElementById('fileInput');

    const SLICE_SIZE = 100000;

    fileInput.addEventListener("change", function (evt) {
        output('---');

        let selectedFile = fileInput.files[0];

        console.log("selectedFile:", selectedFile.name, selectedFile.size);

        let md5whole = new SparkMD5.ArrayBuffer();
        let position = 0;
        let slice = selectedFile.slice(position, position + SLICE_SIZE);
        let fileReader = new FileReader();
        fileReader.onload = function (evt) {
            let arrayBuffer = evt.target.result;

            if (slice.size > 0) {
                console.log("position:", position);
                md5whole.append(arrayBuffer);

                position += slice.size;
                slice = selectedFile.slice(position, position + SLICE_SIZE);
                fileReader.readAsArrayBuffer(slice);
            } else {
                let hash = md5whole.end();
                output("MD5: " + hash);
                postRemaining(selectedFile, hash);
            }
        };
        fileReader.onerror = function (err) {
            output(err);
        };
        fileReader.readAsArrayBuffer(slice);
    });

    function postRemaining(file, hash) {
        let url = urlInput.value;
        let mode = url.startsWith(location.origin) ? 'same-origin' : 'cors';
        let startPos = parseInt(document.getElementById('startPosInput').value, 10);
        let continuedFile = file.slice(startPos, undefined, file.type);
        console.log("url:", url, "   startPos:", startPos, "   mode:", mode);
        if (continuedFile.size === 0) {
            output("no more to send");
            return;
        }
        output("remaining size: " + continuedFile.size);

        fetch(url, {
            method: 'POST',
            body: continuedFile,
            headers: {
                'Access-Control-Request-Headers': 'X-Content-Range',
                'X-Content-Range': 'bytes ' + startPos + '-' + file.size + '/' + file.size,
                'X-MD5': hash
            },
            mode: mode,
        }).then(response => {
            output(response);
        }).catch(err => {
            output(err);
        })

    }

    function output(msg) {
        console.log(msg);

        let div = document.createElement('div');
        div.innerText = msg;
        document.body.appendChild(div);
    }
});

            
          
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