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PHP/cURL download progress monitoring
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| <?php | |
| //If output buffer flushing does not work, web-search for reasons your php/webserver setup may need to be adjusted | |
| header('X-Accel-Buffering: no'); | |
| if (ob_get_level() == 0) ob_start(); | |
| //create javascript progress bar | |
| echo "<html> | |
| <head> | |
| <script type='text/javascript'> | |
| function updateProgress(perc) { | |
| document.getElementById('info').innerHTML = perc + '%'; | |
| document.getElementById('prog').value = perc; | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <p>Lets see some progress</p> | |
| <progress id='prog' value='0' max='100.0'></progress> <span id='info'>0%</span> | |
| "; | |
| //flush the progress bar | |
| ob_flush(); | |
| flush(); | |
| //Callback Function for later | |
| function progressCallback( $resource, $download_size, $downloaded_size, $upload_size, $uploaded_size ) { | |
| static $previousProgress = 0; | |
| if ( $download_size != 0 ) { | |
| $progress = round( $downloaded_size * 100 / $download_size ); | |
| if ( $progress > $previousProgress ) { | |
| $previousProgress = $progress; | |
| //update javacsript progress bar to show download progress | |
| echo "<script>updateProgress('$progress');</script>"; | |
| ob_flush(); | |
| flush(); | |
| } | |
| } | |
| } | |
| //Start the curl | |
| $targetFile = fopen( 'testfile.iso', 'w' ); | |
| $ch = curl_init( 'https://ftp.free.org/mirrors/releases.ubuntu.com/releases/20.04/ubuntu-20.04.3-live-server-amd64.iso' ); | |
| curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); | |
| curl_setopt( $ch, CURLOPT_NOPROGRESS, false ); | |
| curl_setopt( $ch, CURLOPT_PROGRESSFUNCTION, 'progressCallback' ); | |
| curl_setopt( $ch, CURLOPT_FILE, $targetFile ); | |
| curl_exec( $ch ); | |
| fclose( $targetFile ); | |
| //if we get here, the download has completed | |
| echo "<script>document.getElementById('info').innerHTML = 'Done';</script>"; | |
| //flush just to be sure | |
| ob_flush(); | |
| flush(); | |
| ?> |
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I get your point, ob statements wont work after the DOM is fully rendered.
I am doing this whole process in ajax i.e my curl is executing in ajax.
I am looking for a workaround to get it working like this example, any suggestions ?