Download file through an ajax call php
I have a button and onclick it will call an ajax function.
Here is my ajax function
function csv(){
ajaxRequest = ajax();//ajax()
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@joe : Many thanks, this was a good heads up!
I had a slightly harder problem: 1. sending an AJAX request with POST data, for the server to produce a ZIP file 2. getting a response back 3. download the ZIP file
So that's how I did it (using JQuery to handle the AJAX request):
Initial post request:
var parameters = { pid : "mypid", "files[]": ["file1.jpg","file2.jpg","file3.jpg"] }var options = { url: "request/url",//replace with your request url type: "POST",//replace with your request type data: parameters,//see above context: document.body,//replace with your contex success: function(data){ if (data) { if (data.path) { //Create an hidden iframe, with the 'src' attribute set to the created ZIP file. var dlif = $('
',{'src':data.path}).hide(); //Append the iFrame to the context this.append(dlif); } else if (data.error) { alert(data.error); } else { alert('Something went wrong'); } } } }; $.ajax(options);
The "request/url" handles the zip creation (off topic, so I wont post the full code) and returns the following JSON object. Something like:
//Code to create the zip file //...... //Id of the file $zipid = "myzipfile.zip" //Download Link - it can be prettier $dlink = 'http://'.$_SERVER["SERVER_NAME"].'/request/download&file='.$zipid; //JSON response to be handled on the client side $result = '{"success":1,"path":"'.$dlink.'","error":null}'; header('Content-type: application/json;'); echo $result;The "request/download" can perform some security checks, if needed, and generate the file transfer:
$fn = $_GET['file']; if ($fn) { //Perform security checks //.....check user session/role/whatever $result = $_SERVER['DOCUMENT_ROOT'].'/path/to/file/'.$fn; if (file_exists($result)) { header('Content-Description: File Transfer'); header('Content-Type: application/force-download'); header('Content-Disposition: attachment; filename='.basename($result)); header('Content-Transfer-Encoding: binary'); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); header('Content-Length: ' . filesize($result)); ob_clean(); flush(); readfile($result); @unlink($result); } }
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