/** provides the file as download/streaming
* Request params:
* - tracknr
* - fileid
* - uploaded
* ( either tracknr or fileid or uploaded is required)
* - format optional. One of: mp3, ogg. If format is given, the file is converted to the given format, using command line invocations that are configured in app.yml
*
*
*/
public function executeDownload(sfWebRequest $request)
{
// write session, so it won't lock other requests
session_write_close();
$reqparamUploaded = $this->getRequestParameter('uploaded');
if ($reqparamUploaded) {
$filename = smintUploadFileHelper::getUploadPath() . $reqparamUploaded;
} else {
$tracknr = $this->getRequestParameter('tracknr');
if ($tracknr) {
$file = FilePeer::getFileByExternalKey($tracknr);
$filekey = $tracknr;
} else {
# check if file.id is given
$fileid = $this->getRequestParameter('fileid');
$file = FilePeer::retrieveByPK($fileid);
$filekey = $fileid;
}
//check if a file was found matching tracknr, else exit with 404
if ($file) {
$filename = $file->getUri();
} else {
$this->forward404("file not found in database.");
}
}
//check if a tracknr is given, otherwise exit with 404
if (!$filename) {
$this->forward404("Invalid query! Provide tracknr, fileid or uploaded to get a file.");
}
if (file_exists($filename)) {
//check if file is inside the folder configured in smint/config/app.yml
// or inside the upload folder
$mp3Path = dirname(sfConfig::get('app_files_mp3path') . "/file");
if (strpos($filename, $mp3Path) === false && strpos($filename, smintUploadFileHelper::getUploadPath()) === false) {
$this->forward404("file: {$filename} is outside of the configured path (app.yml): {$mp3Path}. Accessing files outside the path is not allowed. Check app.yml and URI in file table.");
}
// -----------------------------------------------
// -------------- check for format --------------
// if no format is given,
$reqparamFormat = $this->getRequestParameter('format');
if ($reqparamFormat) {
if (substr($filename, -3) === $reqparamFormat) {
mysfLog::log($this, "INFO: format parameter equals original audio file suffix. No conversion.");
if ($reqparamFormat === "mp3") {
$contenttype = "audio/mpeg";
} else {
$contenttype = "audio/{$reqparamFormat}";
}
} else {
// conversion
if ($reqparamFormat === "ogg") {
$filename = smintFileserverHelper::doFileConversion($filename, $reqparamFormat);
$contenttype = "audio/ogg";
} else {
if ($reqparamFormat === "mp3") {
$filename = smintFileserverHelper::doFileConversion($filename, $reqparamFormat);
$contenttype = "audio/mpeg";
} else {
if ($reqparamFormat === "waveform") {
$filename = smintFileserverHelper::doFileConversion($filename, $reqparamFormat);
$contenttype = "application/txt";
} else {
if ($reqparamFormat === "png") {
$waveformfilename = smintFileserverHelper::doFileConversion($filename, "waveform");
$wfdata = split(", ", file_get_contents($waveformfilename));
//mysfLog::log($this, print_r($wfdata, true));
// how much detail we want. Larger number means less detail
// (basically, how many bytes/frames to skip processing)
// the lower the number means longer processing time
// EP: in SMINT we do not chagne this. To change the detail, edit your waveform_resolution
// config param in app.yml!
define("DETAIL", 1);
// get user vars from form
$width = $this->getRequestParameter('width') ? rawurldecode($this->getRequestParameter('width')) : 640;
$height = $this->getRequestParameter('height') ? rawurldecode($this->getRequestParameter('height')) : 100;
$foreground = $this->getRequestParameter('fg') ? rawurldecode($this->getRequestParameter('fg')) : "#4D4D4D";
$background = $this->getRequestParameter('bg') ? rawurldecode($this->getRequestParameter('bg')) : "#ffffff";
$maxval = 0;
$factor = sfConfig::get('app_defaults_waveform_factor', 0.8);
// create original image width based on amount of detail
$img = imagecreatetruecolor(sizeof($wfdata) / DETAIL, $height);
// apply factor to the data
//$wfdata_factor = array_map("this->pow_func", $wfdata);
for ($i = 0; $i < sizeof($wfdata); $i += DETAIL) {
$wfdata[$i] = pow(abs($wfdata[$i]), $factor);
}
$datamaxval = max(array_map("abs", $wfdata));
$normconstant = doubleval($height) / doubleval($datamaxval);
for ($i = 0; $i < sizeof($wfdata); $i += DETAIL) {
$wfdata[$i] = $wfdata[$i] * $normconstant;
}
/*
for ($i = 0; $i < sizeof($wfdata); $i += DETAIL) {
if (abs($wfdata[$i]) > $maxval) {
$maxval = $wfdata[$i];
}
}
if ($maxval < 40) {
for ($i = 0; $i < sizeof($wfdata); $i += DETAIL) {
$wfdata[$i] = pow(abs($wfdata[$i]), 1.4);
}
}
* */
// fill background of image
if ($background == "") {
imagesavealpha($img, true);
$transparentColor = imagecolorallocatealpha($img, 0, 0, 0, 127);
imagefill($img, 0, 0, $transparentColor);
} else {
list($r, $g, $b) = smintTools::html2rgb($background);
imagefilledrectangle($img, 0, 0, sizeof($wfdata) / DETAIL, $height, imagecolorallocate($img, $r, $g, $b));
}
// generate foreground color
list($r, $g, $b) = smintTools::html2rgb($foreground);
// loop through frames/bytes of wav data as genearted above
for ($d = 0; $d < sizeof($wfdata); $d += DETAIL) {
// relative value based on height of image being generated
// data values can range between -127 and 128
$v = $wfdata[$d];
//$v = pow($v, sfConfig::get('app_defaults_waveform_factor', 0.8));
// draw the line on the image using the $v value and centering it vertically on the canvas
imageline($img, $d / DETAIL, ($height - $v) / 2, $d / DETAIL, ($height + $v) / 2, imagecolorallocate($img, $r, $g, $b));
}
// want it resized?
if ($width != imagesx($img)) {
// resample the image to the proportions defined in the form
$rimg = imagecreatetruecolor($width, $height);
// save alpha from original image
imagesavealpha($rimg, true);
imagealphablending($rimg, false);
// copy to resized
imagecopyresampled($rimg, $img, 0, 0, 0, 0, $width, $height, sizeof($wfdata) / DETAIL, $height);
$img = $rimg;
}
$contenttype = "image/png";
header("Content-type: {$contenttype}");
imagepng($img);
imagedestroy($img);
// dont render view
return sfView::NONE;
} else {
$error_message = "ERROR: Format {$reqparamFormat} not valid";
mysfLog::log($this, $error_message);
throw new Exception($error_message);
}
}
}
}
}
} else {
mysfLog::log($this, "INFO: format parameter not given, sending the original file ");
// assuming file ending as content type. Just an approximation
$contenttype = "audio/" . substr($filename, -3);
}
// do a redirect to file to have apache handle it
$this->redirect(smintUploadFileHelper::getDirectFileUrl_for_uploads($filename));
/* alternate version of redirect (not using symf framework)
* does not work better :-(
*
$url = smintUploadFileHelper::getDirectFileUrl_for_uploads($filename);
$statusCode = 302;
// redirect
$response = $this->context->getResponse();
$response->clearHttpHeaders();
$response->setStatusCode($statusCode);
$response->setHttpHeader('Location', $url);
$response->send();
throw new sfStopException();
// we do not reach this part b/o the redirect!
*
*/
// ------------ delegate to helper for download
// serves file, obeying the range header
smintFileserverHelper::serve_file_resumable($this->getResponse(), $filename, $contenttype);
// dont render view
return sfView::NONE;
//return sfView::HEADER_ONLY;
} else {
$missingfile = $filename ? $filename : "No filename found!";
$this->forward404("file for tracknr: not found: " . $missingfile);
}
}
