Force download a pdf link using javascript/ajax/jquery
suppose we have a pdf link "http://manuals.info.apple.com/en/iphone_user_guide.pdf"(just for example and to let u know that file is not on my server, i only have the link)...now i have to provide a button on my site that will download the file.
i have tried various things like window.o开发者_如何学JAVApen, href etc. methods but it open the link on other window. i know thats because now all browser comes with a adobe plugin which opens it in another window, but still isnt there any way i give the user the option of download rather than opening it, through client side scripting ..
plz help.. thanks
Here is a Javascript solution (for folks like me who were looking for an answer to the title):
function SaveToDisk(fileURL, fileName) {
// for non-IE
if (!window.ActiveXObject) {
var save = document.createElement('a');
save.href = fileURL;
save.target = '_blank';
save.download = fileName || 'unknown';
var evt = new MouseEvent('click', {
'view': window,
'bubbles': true,
'cancelable': false
});
save.dispatchEvent(evt);
(window.URL || window.webkitURL).revokeObjectURL(save.href);
}
// for IE < 11
else if ( !! window.ActiveXObject && document.execCommand) {
var _window = window.open(fileURL, '_blank');
_window.document.close();
_window.document.execCommand('SaveAs', true, fileName || fileURL)
_window.close();
}
}
source: http://muaz-khan.blogspot.fr/2012/10/save-files-on-disk-using-javascript-or.html
Unfortunately this is not working for me with IE11, which is not accepting new MouseEvent. I use the following in that case:
//...
try {
var evt = new MouseEvent(...);
} catch (e) {
window.open(fileURL, fileName);
}
//...
Use the HTML5 "download" attribute
<a href="iphone_user_guide.pdf" download="iPhone User's Guide.PDF">click me</a>
2021 Update: Now supported in all major browsers! see: caniuse.com/#search=download
If you need to support older browsers, or you're looking for an actual javascript solution (for some reason) please see lajarre's answer
With JavaScript it is very difficult if not impossible(?). I would suggest using some sort of code-behind language such as PHP, C#, or Java. If you were to use PHP, you could, in the page your button posts to, do something like this:
<?php
header('Content-type: application/pdf');
header('Content-disposition: attachment; filename=filename.pdf');
readfile("http://manuals.info.apple.com/en/iphone_user_guide.pdf");
?>
This also seems to work for JS (from http://www.phpbuilder.com/board/showthread.php?t=10149735):
<body>
<script>
function downloadme(x){
myTempWindow = window.open(x,'','left=10000,screenX=10000');
myTempWindow.document.execCommand('SaveAs','null','download.pdf');
myTempWindow.close();
}
</script>
<a href=javascript:downloadme('http://manuals.info.apple.com/en/iphone_user_guide.pdf');>Download this pdf</a>
</body>
Here is the perfect example of downloading a file using javaScript.
Usage: download_file(fileURL, fileName);
If htaccess is an option this will make all PDF links download instead of opening in browser
<FilesMatch "\.(?i:pdf)$">
ForceType application/octet-stream
Header set Content-Disposition attachment
</FilesMatch>
In javascript use the preventDefault() method of the event args parameter.
<a href="no-script.html">Download now!</a>
$('a').click(function(e) {
e.preventDefault(); // stop the browser from following
window.location.href = 'downloads/file.pdf';
});
Using Javascript you can download like this in a simple method
var oReq = new XMLHttpRequest();
// The Endpoint of your server
var URLToPDF = "https://mozilla.github.io/pdf.js/web/compressed.tracemonkey-pldi-09.pdf";
// Configure XMLHttpRequest
oReq.open("GET", URLToPDF, true);
// Important to use the blob response type
oReq.responseType = "blob";
// When the file request finishes
// Is up to you, the configuration for error events etc.
oReq.onload = function() {
// Once the file is downloaded, open a new window with the PDF
// Remember to allow the POP-UPS in your browser
var file = new Blob([oReq.response], {
type: 'application/pdf'
});
// Generate file download directly in the browser !
saveAs(file, "mypdffilename.pdf");
};
oReq.send();
加载中,请稍侯......
精彩评论