Pure HTML5 file upload

Pure HTML5 file upload

Today we will be developing a great HTML5 file upload form with progress bar and preview (at client-side). We have already gave you jQuery based solution, but today’s application don’t require jQuery at all. All made in pure HTML5 Javascript. I’m going to use FileReader (html5) to implement live preview (without uploading to server), and, going to use XMLHttpRequest to send data to server.

Here are our demo and downloadable package:

Live Demo

download in package

Ok, download the sources and lets begin !

Step 1. HTML

At this page you can see out form for upload images

index.html


<html lang="en" >
    <head>
        <meta charset="utf-8" />
        <title>Pure HTML5 file upload | Script Tutorials</title>
        <link href="css/main.css" rel="stylesheet" type="text/css" />
        <script src="js/script.js"></script>
    </head>
    <body>
        <header>
            <h2>Pure HTML5 file upload</h2>
            <a href="http://www.script-tutorials.com/pure-html5-file-upload/" class="stuts">Back to original tutorial on <span>Script Tutorials</span></a>
        </header>
        <div class="container">
            <div class="contr"><h2>You can select the file (image) and click Upload button</h2></div>

            <div class="upload_form_cont">
                <form id="upload_form" enctype="multipart/form-data" method="post" action="upload.php">
                    <div>
                        <div><label for="image_file">Please select image file</label></div>
                        <div><input type="file" name="image_file" id="image_file" onchange="fileSelected();" /></div>
                    </div>
                    <div>
                        <input type="button" value="Upload" onclick="startUploading()" />
                    </div>
                    <div id="fileinfo">
                        <div id="filename"></div>
                        <div id="filesize"></div>
                        <div id="filetype"></div>
                        <div id="filedim"></div>
                    </div>
                    <div id="error">You should select valid image files only!</div>
                    <div id="error2">An error occurred while uploading the file</div>
                    <div id="abort">The upload has been canceled by the user or the browser dropped the connection</div>
                    <div id="warnsize">Your file is very big. We can't accept it. Please select more small file</div>

                    <div id="progress_info">
                        <div id="progress"></div>
                        <div id="progress_percent">&nbsp;</div>
                        <div class="clear_both"></div>
                        <div>
                            <div id="speed">&nbsp;</div>
                            <div id="remaining">&nbsp;</div>
                            <div id="b_transfered">&nbsp;</div>
                            <div class="clear_both"></div>
                        </div>
                        <div id="upload_response"></div>
                    </div>
                </form>

                <img id="preview" />
            </div>
        </div>
    </body>
</html>

Step 2. CSS

css/main.css

I have selected all necessary styles for our html5 upload form

css/main.css

.upload_form_cont {
    background: -moz-linear-gradient(#ffffff, #f2f2f2);
    background: -ms-linear-gradient(#ffffff, #f2f2f2);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #ffffff), color-stop(100%, #f2f2f2));
    background: -webkit-linear-gradient(#ffffff, #f2f2f2);
    background: -o-linear-gradient(#ffffff, #f2f2f2);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#f2f2f2');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#f2f2f2')";
    background: linear-gradient(#ffffff, #f2f2f2);

    color:#000;
    overflow:hidden;
}
#upload_form {
    float:left;
    padding:20px;
    width:700px;
}
#preview {
    background-color:#fff;
    display:block;
    float:right;
    width:200px;
}
#upload_form > div {
    margin-bottom:10px;
}
#speed,#remaining {
    float:left;
    width:100px;
}
#b_transfered {
    float:right;
    text-align:right;
}
.clear_both {
    clear:both;
}
input {
    border-radius:10px;
    -moz-border-radius:10px;
    -ms-border-radius:10px;
    -o-border-radius:10px;
    -webkit-border-radius:10px;

    border:1px solid #ccc;
    font-size:14pt;
    padding:5px 10px;
}
input[type=button] {
    background: -moz-linear-gradient(#ffffff, #dfdfdf);
    background: -ms-linear-gradient(#ffffff, #dfdfdf);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #ffffff), color-stop(100%, #dfdfdf));
    background: -webkit-linear-gradient(#ffffff, #dfdfdf);
    background: -o-linear-gradient(#ffffff, #dfdfdf);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#dfdfdf');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#dfdfdf')";
    background: linear-gradient(#ffffff, #dfdfdf);
}
#image_file {
    width:400px;
}
#progress_info {
    font-size:10pt;
}
#fileinfo,#error,#error2,#abort,#warnsize {
    color:#aaa;
    display:none;
    font-size:10pt;
    font-style:italic;
    margin-top:10px;
}
#progress {
    border:1px solid #ccc;
    display:none;
    float:left;
    height:14px;

    border-radius:10px;
    -moz-border-radius:10px;
    -ms-border-radius:10px;
    -o-border-radius:10px;
    -webkit-border-radius:10px;

    background: -moz-linear-gradient(#66cc00, #4b9500);
    background: -ms-linear-gradient(#66cc00, #4b9500);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #66cc00), color-stop(100%, #4b9500));
    background: -webkit-linear-gradient(#66cc00, #4b9500);
    background: -o-linear-gradient(#66cc00, #4b9500);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#66cc00', endColorstr='#4b9500');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#66cc00', endColorstr='#4b9500')";
    background: linear-gradient(#66cc00, #4b9500);
}
#progress_percent {
    float:right;
}
#upload_response {
    margin-top: 10px;
    padding: 20px;
    overflow: hidden;
    display: none;
    border: 1px solid #ccc;

    border-radius:10px;
    -moz-border-radius:10px;
    -ms-border-radius:10px;
    -o-border-radius:10px;
    -webkit-border-radius:10px;

    box-shadow: 0 0 5px #ccc;
    background: -moz-linear-gradient(#bbb, #eee);
    background: -ms-linear-gradient(#bbb, #eee);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #bbb), color-stop(100%, #eee));
    background: -webkit-linear-gradient(#bbb, #eee);
    background: -o-linear-gradient(#bbb, #eee);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#bbb', endColorstr='#eee');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#bbb', endColorstr='#eee')";
    background: linear-gradient(#bbb, #eee);
}

Step 3. HTML5 JS

js/script.js

// common variables
var iBytesUploaded = 0;
var iBytesTotal = 0;
var iPreviousBytesLoaded = 0;
var iMaxFilesize = 1048576; // 1MB
var oTimer = 0;
var sResultFileSize = '';

function secondsToTime(secs) { // we will use this function to convert seconds in normal time format
    var hr = Math.floor(secs / 3600);
    var min = Math.floor((secs - (hr * 3600))/60);
    var sec = Math.floor(secs - (hr * 3600) -  (min * 60));

    if (hr < 10) {hr = "0" + hr; }
    if (min < 10) {min = "0" + min;}
    if (sec < 10) {sec = "0" + sec;}
    if (hr) {hr = "00";}
    return hr + ':' + min + ':' + sec;
};

function bytesToSize(bytes) {
    var sizes = ['Bytes', 'KB', 'MB'];
    if (bytes == 0) return 'n/a';
    var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
    return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i];
};

function fileSelected() {

    // hide different warnings
    document.getElementById('upload_response').style.display = 'none';
    document.getElementById('error').style.display = 'none';
    document.getElementById('error2').style.display = 'none';
    document.getElementById('abort').style.display = 'none';
    document.getElementById('warnsize').style.display = 'none';

    // get selected file element
    var oFile = document.getElementById('image_file').files[0];

    // filter for image files
    var rFilter = /^(image\/bmp|image\/gif|image\/jpeg|image\/png|image\/tiff)$/i;
    if (! rFilter.test(oFile.type)) {
        document.getElementById('error').style.display = 'block';
        return;
    }

    // little test for filesize
    if (oFile.size > iMaxFilesize) {
        document.getElementById('warnsize').style.display = 'block';
        return;
    }

    // get preview element
    var oImage = document.getElementById('preview');

    // prepare HTML5 FileReader
    var oReader = new FileReader();
        oReader.onload = function(e){

        // e.target.result contains the DataURL which we will use as a source of the image
        oImage.src = e.target.result;

        oImage.onload = function () { // binding onload event

            // we are going to display some custom image information here
            sResultFileSize = bytesToSize(oFile.size);
            document.getElementById('fileinfo').style.display = 'block';
            document.getElementById('filename').innerHTML = 'Name: ' + oFile.name;
            document.getElementById('filesize').innerHTML = 'Size: ' + sResultFileSize;
            document.getElementById('filetype').innerHTML = 'Type: ' + oFile.type;
            document.getElementById('filedim').innerHTML = 'Dimension: ' + oImage.naturalWidth + ' x ' + oImage.naturalHeight;
        };
    };

    // read selected file as DataURL
    oReader.readAsDataURL(oFile);
}

function startUploading() {
    // cleanup all temp states
    iPreviousBytesLoaded = 0;
    document.getElementById('upload_response').style.display = 'none';
    document.getElementById('error').style.display = 'none';
    document.getElementById('error2').style.display = 'none';
    document.getElementById('abort').style.display = 'none';
    document.getElementById('warnsize').style.display = 'none';
    document.getElementById('progress_percent').innerHTML = '';
    var oProgress = document.getElementById('progress');
    oProgress.style.display = 'block';
    oProgress.style.width = '0px';

    // get form data for POSTing
    //var vFD = document.getElementById('upload_form').getFormData(); // for FF3
    var vFD = new FormData(document.getElementById('upload_form')); 

    // create XMLHttpRequest object, adding few event listeners, and POSTing our data
    var oXHR = new XMLHttpRequest();
    oXHR.upload.addEventListener('progress', uploadProgress, false);
    oXHR.addEventListener('load', uploadFinish, false);
    oXHR.addEventListener('error', uploadError, false);
    oXHR.addEventListener('abort', uploadAbort, false);
    oXHR.open('POST', 'upload.php');
    oXHR.send(vFD);

    // set inner timer
    oTimer = setInterval(doInnerUpdates, 300);
}

function doInnerUpdates() { // we will use this function to display upload speed
    var iCB = iBytesUploaded;
    var iDiff = iCB - iPreviousBytesLoaded;

    // if nothing new loaded - exit
    if (iDiff == 0)
        return;

    iPreviousBytesLoaded = iCB;
    iDiff = iDiff * 2;
    var iBytesRem = iBytesTotal - iPreviousBytesLoaded;
    var secondsRemaining = iBytesRem / iDiff;

    // update speed info
    var iSpeed = iDiff.toString() + 'B/s';
    if (iDiff > 1024 * 1024) {
        iSpeed = (Math.round(iDiff * 100/(1024*1024))/100).toString() + 'MB/s';
    } else if (iDiff > 1024) {
        iSpeed =  (Math.round(iDiff * 100/1024)/100).toString() + 'KB/s';
    }

    document.getElementById('speed').innerHTML = iSpeed;
    document.getElementById('remaining').innerHTML = '| ' + secondsToTime(secondsRemaining);
}

function uploadProgress(e) { // upload process in progress
    if (e.lengthComputable) {
        iBytesUploaded = e.loaded;
        iBytesTotal = e.total;
        var iPercentComplete = Math.round(e.loaded * 100 / e.total);
        var iBytesTransfered = bytesToSize(iBytesUploaded);

        document.getElementById('progress_percent').innerHTML = iPercentComplete.toString() + '%';
        document.getElementById('progress').style.width = (iPercentComplete * 4).toString() + 'px';
        document.getElementById('b_transfered').innerHTML = iBytesTransfered;
        if (iPercentComplete == 100) {
            var oUploadResponse = document.getElementById('upload_response');
            oUploadResponse.innerHTML = '<h1>Please wait...processing</h1>';
            oUploadResponse.style.display = 'block';
        }
    } else {
        document.getElementById('progress').innerHTML = 'unable to compute';
    }
}

function uploadFinish(e) { // upload successfully finished
    var oUploadResponse = document.getElementById('upload_response');
    oUploadResponse.innerHTML = e.target.responseText;
    oUploadResponse.style.display = 'block';

    document.getElementById('progress_percent').innerHTML = '100%';
    document.getElementById('progress').style.width = '400px';
    document.getElementById('filesize').innerHTML = sResultFileSize;
    document.getElementById('remaining').innerHTML = '| 00:00:00';

    clearInterval(oTimer);
}

function uploadError(e) { // upload error
    document.getElementById('error2').style.display = 'block';
    clearInterval(oTimer);
}  

function uploadAbort(e) { // upload abort
    document.getElementById('abort').style.display = 'block';
    clearInterval(oTimer);
}

Most of code is already commented. So I will hope that you will understand all this code. Anyway – how it working: when we select file – function ‘fileSelected’ is executing. We filter all unnecessary formats (allow to upload next formats: bmp, gif, jpg, png, tif), in case of huge file – we will draw warning message. Then, through FileReader::readAsDataURL we will draw live preview of selected file. Plus, we will display another information about image: its name, size, type, and dimensions. Process of uploading is a little complicated. But generally, we have to prepare XMLHttpRequest object, add event listeners to next events: progress, load, error and abort. And after – post form data (I have used FormData class) to our ‘upload.php’ receiver.

Step 4. PHP

upload.php

<?php

function bytesToSize1024($bytes, $precision = 2) {
    $unit = array('B','KB','MB');
    return @round($bytes / pow(1024, ($i = floor(log($bytes, 1024)))), $precision).' '.$unit[$i];
}

$sFileName = $_FILES['image_file']['name'];
$sFileType = $_FILES['image_file']['type'];
$sFileSize = bytesToSize1024($_FILES['image_file']['size'], 1);

echo <<<EOF
<p>Your file: {$sFileName} has been successfully received.</p>
<p>Type: {$sFileType}</p>
<p>Size: {$sFileSize}</p>
EOF;

As you can see – I’m not uploading file. But, ‘echo’ back all info about accepted file. This information will appear in our <div id="upload_response"></div> element.

Live Demo

download in package

Conclusion

Welcome back to read new awesome and unique articles about HTML5. Good luck!

About: admin:
I am web developer with huge experience (in web languages and even in system languages). Also I am the founder of current website (and several another). I like to write blogs about web development/design. Feel free to Follow us on Twitter: tweetmeme_screen_name='AramisGC';

If you Enjoyed our article don't forget to Share the love with your friends.

Written by: admin on December 9, 2011.

6 Comments

pl4g4
December 12, 2011 at 6:49 pm | Permalink
when i run the demo in ie9. im getting the following error .
SCRIPT5009: ‘FormData’ is undefined
script.js, line 94 character 5
var vFD = new FormData(document.getElementById(‘upload_form’));
the upload gets stuck.
admin
December 22, 2011 at 5:56 am | Permalink
Hi pl4g4,
Yes, FormData haven’t supported in IE browser yet. Here are small tester: http://ahedg.es/webkit/formdata.html
Plus, you can read more about sending POSt date with XMLHttpRequest here: http://forums.asp.net/t/1424687.aspx
Philip Bolt
January 3, 2012 at 10:48 pm | Permalink
I think this is a great display and the demo works fine but when I try to run the downloaded code, I get an ‘upload error’ message.
admin
January 7, 2012 at 4:25 pm | Permalink
Hi Philip,
Why? link http://www.script-tutorials.com/demos/199/source.zip always available, re-check it.
German
February 5, 2012 at 5:22 am | Permalink
Great code but how do I get it to do the actual upload and dictate the path to where the file is uploaded. As per the tutorial you say it is only echoing the actual transfer but not transferring the file. How do I get it yo upload to a given director? Thanks.
admin
February 9, 2012 at 12:28 pm | Permalink
Hello German,
This is pretty easy – focus your attention to PHP receiver: our upload.php.
In current state – it display just some information about our uploaded file.
Now, you can follow: http://de.php.net/manual/en/features.file-upload.post-method.php
Here you can see example of accepting of files

Live Demo

download in package

Step 1. HTML

index.html

Step 2. CSS

css/main.css

css/main.css

Step 3. HTML5 JS

js/script.js

Step 4. PHP

upload.php

Live Demo

download in package

Conclusion

6 Comments

Leave a Reply Cancel reply

Recent Tutorials

Friends

Pure HTML5 file upload

Live Demo

download in package

Step 1. HTML

index.html

Step 2. CSS

css/main.css

css/main.css

Step 3. HTML5 JS

js/script.js

Step 4. PHP

upload.php

Live Demo

download in package

Conclusion

Related Stuff You Will Love!

6 Comments

Leave a Reply Cancel reply

Popular Tutorials

Tags

Recent Tutorials

Friends