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Last active July 25, 2022 01:25
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Quick example of how to download/stream a file using Zend Expressive.
* This is a quick example of how to stream a file to a client, likely a browser,
* using Zend Expressive. There are a lot of factors which it doesn't take in to
* account. But for the purposes of a quick intro, this should suffice.
class ViewDocumentPageAction
protected function downloadFile()
$file = 'path/to/your/file';
// create a Stream object, to stream your file to the client
$body = new Stream('php://temp', 'w+');
// Return a response, containing all of the appropriate headers for
// the file that you're sending to the client. You could initialise a
// class which does all this for you, instead of having to remember
// them all by hand. But I'm keen to provide full transparency in
// this example.
return $response
->withHeader('Content-Type', 'application/octet-stream')
"attachment; filename=" . basename($file)
->withHeader('Content-Transfer-Encoding', 'Binary')
->withHeader('Content-Description', 'File Transfer')
->withHeader('Pragma', 'public')
->withHeader('Expires', '0')
->withHeader('Cache-Control', 'must-revalidate')
->withHeader('Content-Length', "{$body->getSize()}");
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Hi, I have a button. on click, through ajax, i call handler method which returns the response object, exactly like shown in above example.
Now what to do on success? It's not downloading file.
function downloadSupportdoc(values) {
id = values['docid'];
url: "/downloads/" + id,
method: "GET",
}).done(function (response) {
$("#successAlert").html("Success - JUST TESTING.");

    }).fail(function (jqXHR, textStatus) {
        if (jqXHR.responseJSON !== undefined) {
            message = jqXHR.responseJSON.error.message;
        } else {
            message = jqXHR.statusText;
        $("#failedAlert").html("<strong>Unable to Download Document" + id + ' ' + message + '. Please Try Again.</strong>');
    return false;

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afilina commented Mar 6, 2020

This has been extremely helpful for me today in refactoring a ZF1 application with header() + exit calls. Thank you very much!

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