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extra/progress.js  view on Meta::CPAN

    var height = options.height || '150';
    window.open ('/UpdateProgress?progress_id='+id,'Apache2-UploadProgress','location=0,status=0,width='+width+',height='+height); return true;
}

function startEmbeddedProgressBar(form) {
    progress = {};
    progress.id         = generateProgressID();
    if (form.action.match(/\?/))
        form.action += '&progress_id=' + progress.id;
    else
        form.action += '?progress_id=' + progress.id;
    progress.starttime  = new Date();
    progress.lasttime   = new Date(progress.starttime);
    progress.lastamount = 0;
    window.setTimeout( reportUploadProgress, 100 );
    return true;
}

function updateHTMLProgressBar(progress) {
    if (progress.size > progress.received)
        window.setTimeout( function() { window.location.reload() }, 1000 );
    updateProgressBar( progress );
    return true;
}

function updateProgressBar(progress) {

    if (progress.received == progress.size)
        progress.finished = 1;

    // Only calculate rates and times is we were given a starttime
    if (progress.starttime) {
        var currenttime = new Date();
        var totalelapsedtime = ( currenttime.getTime() - progress.starttime.getTime() ) / 1000;
        var lastelapsedtime  = ( currenttime.getTime() - progress.lasttime.getTime() ) / 1000;

        progress.elapsedtime = totalelapsedtime;

        if (totalelapsedtime != 0)
            progress.rate = parseInt( progress.received / totalelapsedtime );
        else
            progress.rate = 0;

        if (lastelapsedtime != 0)
            progress.currentrate = parseInt( (progress.received - progress.lastamount) / lastelapsedtime );
        else
            progress.currentrate = 0

        if (progress.currentrate != 0)
            progress.remainingtime = parseInt( (progress.size - progress.received) / progress.rate );
        else
            progress.remainingtime = '';

        progress.currentrate   = formatBytes(progress.currentrate);
        progress.rate          = formatBytes(progress.rate);
        progress.elapsedtime   = formatTime(progress.elapsedtime);
        progress.remainingtime = formatTime(progress.remainingtime);
    }

    if (progress.size != 0)
        progress.percent = Math.round(progress.received / progress.size * 100);

    progress.size     = formatBytes(progress.size);
    progress.received = formatBytes(progress.received);

    document.getElementById('progress').innerHTML = Jemplate.process('progress.jmpl', progress);
}

function reportUploadProgress() {
    
    url = '/UpdateProgress?progress_id=' + progress.id;

    var req = new XMLHttpRequest();
    req.open('GET', url, Boolean(handleUploadProgressResults));
    // We have to set the qvalue to 1.1 because Konqueror sends
    // it's standard Accept header with our header tacked on the end
    // which means that text/html gets picked first
    req.setRequestHeader(
        'Accept', 
        'text/x-json; q=1.1'
    );
    req.onreadystatechange = function() {
        if (req.readyState == 4 && req.status == 200)
            handleUploadProgressResults(req.responseText);
    };
    req.send(null);
}

function handleUploadProgressResults(results) {

    var state = JSON.parse(results);

    if ( state != undefined ) {

        state.starttime       = progress.starttime;
        state.lasttime        = progress.lasttime;
        state.lastamount      = progress.lastamount;

        progress.lasttime     = new Date();
        progress.lastamount   = state.received;
        progress.size         = state.size;
        progress.received     = state.received;

        if ( progress.received != progress.size ) {
            window.setTimeout( reportUploadProgress, 1000 );
        }

        updateProgressBar(state);
    }
}

function formatTime(time) {
    var seconds = Math.round(time);
    var minutes = 0;
    if (time >= 60) {
        minutes = Math.round(seconds / 60);
        seconds %= 60;
    }
    if (seconds < 10)
        seconds = '0' + seconds;