/**
* This renders a File Upload Form with an APC Progress Bar.
*
* It uses the APC RFC1867 File Upload Progress Hook check.
* The APC PROGRESS BAR will only work if
* a) APC is active
* b) apc.rfc1867 = 1
* Watch out: This value can not be set by .htaccess, it's a PHP_INI_SYSTEM value.
* You have to set this in php.ini.
*
* @see http://php.net/manual/de/apc.configuration.php
*/
public function render()
{
// APC RFC1867 File Upload Progress Hook check
if (ini_get('apc.rfc1867') === false) {
echo 'No Upload with APC possible.';
}
/*
* This javascript handler for fetching the json results array from apc_fetch method.
* @see get-progress.php
*/
$javascript = "<script type=\"text/javascript\"> //<![CDATA[\n\n \$(document).ready(function () {\n \$(\"#progressbar\").progressbar({ value: 0 });\n });\n\n function getUploadProgress(uniqueID)\n {\n var req;\n try {\n req = window.XMLHttpRequest?new XMLHttpRequest():\n new ActiveXObject(\"Microsoft.XMLHTTP\");\n } catch (e) {\n // No AJAX Support\n }\n\n req.onreadystatechange = function () {\n if ((req.readyState == 4) && (req.status == 200)) {\n // evaluate the incomming json array\n var status = eval('(' + req.responseText + ')');\n // call updateDisplay and assign array\n updateDisplay(status);\n }\n }\n req.open('GET', 'get-progress.php?uniqueID='+uniqueID);\n req.send(null);\n }\n\n function updateDisplay(status)\n {\n var rate = parseInt(status['rate']/1024);\n if (status['cancel_upload']) {\n txt='Upload was cancelled after '+resp['current']+' bytes!';\n } else {\n txt=status['total']+' bytes uploaded!';\n }\n txt += '<br>Upload rate was '+rate+' kbps.';\n\n document.getElementById('upload_status').style.display = '';\n\n var percent = parseInt(100*(status['current']/status['total']));\n document.getElementById('uploadFile').innerHTML = status['filename'];\n document.getElementById('uploadSize').innerHTML =\n (parseInt(status['current'])/1024) + 'KB of ' + (parseInt(status['total'])/1024) + 'KB';\n document.getElementById('progressBar').style.width = ''+percent+'%';\n\n // jquery progress bar\n \$('#progressbar').progressbar('option', 'value', percent);\n\n // todo: cancel button, status['done'], status['total'], status['canceled']\n\n //document.getElementById('upload_status').innerHTML = txt;\n\n }\n //]]></script>";
// add an iframe, so that the upload happens in there and is not blocking the website
$html = '<!-- Hidden iframe for performing the Upload -->' . CR . '
<iframe style="display:none" name="hidden_upload" src="' . WWW_ROOT . 'upload-file.php"></iframe>';
// add ajax status (upload_status, uploadFile, uploadSize, progressBar)
$html .= '<!-- Ajax Upload Status -->
<div id="progressbar"></div>
<div id="upload_status" style="display:none;">
Currently uploading <strong id="uploadFile"></strong><br>
<span id="uploadSize"></span><br>
<div style="width:600px; background:#CCCCCC;">
<div id="progressBar" style="background-color:#00CC66; width:0%;"> </div>
</div>
</div>
';
/*
* APC needs a hidden element
* a) with a certain name
* b) with a unique tracking id for the file
* c) placed before the input file element.
*/
$uniqueID = md5(uniqid(mt_rand(), true));
$hidden = new Hidden();
$html .= $hidden->setName('APC_UPLOAD_PROGRESS')->setID('upload_status')->setValue($uniqueID);
// add the input element
$html .= '<input name="uploadfile" size="30" type="file">';
// add a submit button
$submit = new Submitbutton();
$submit->setValue(_('Upload File'));
$submit->setAdditionalAttributeAsText('onclick="this.disabled=true;' . "setInterval('getUploadProgress(\\''+this.form.APC_UPLOAD_PROGRESS.value+'\\')', 750); \" ");
$html .= $submit;
return $javascript . $html;
}
