Download File Using jQuery

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Yes, you would have to change the window.location.href to the url of the file you would want to download.

window.location.href = 'http://www.com/path/to/file';

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最佳答案

I might suggest this, as a more gracefully degrading solution, using preventDefault:

$('a').click(function(e) {
e.preventDefault();  //stop the browser from following
window.location.href = 'uploads/file.doc';
});


<a href="no-script.html">Download now!</a>

Even if there's no Javascript, at least this way the user will get some feedback.

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If you don't want search engines to index certain files, you can use robots.txt to tell web spiders not to access certain parts of your website.

If you rely only on javascript, then some users who browse without it won't be able to click your links.

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Here's a nice article that shows many ways of hiding files from search engines:

http://antezeta.com/news/avoid-search-engine-indexing

JavaScript isn't a good way not to index a page; it won't prevent users from linking directly to your files (and thus revealing it to crawlers), and as Rob mentioned, wouldn't work for all users.
An easy fix is to add the rel="nofollow" attribute, though again, it's not complete without robots.txt.

<a href="uploads/file.doc" rel="nofollow">Download Here</a>

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See here for a similar post on using jQuery to clear forms: Resetting a multi-stage form with jQuery

You may also be running into an issue where the values are being repopulated by the struts value stack. In other words, you submit your form, do whatever in the action class, but do not clear the related field values in the action class. In this scenario the form would appear to maintain the values you previously submitted. If you are persisting these in some way, just null each field value in your action class after persisting and prior to returning SUCCESS.

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By stating window.location.href = 'uploads/file.doc'; you show where you store your files. You might of course use .htacess to force the required behaviour for stored files, but this might not always be handful....

It is better to create a server side php-file and place this content in it:

header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.$_REQUEST['f']);
readfile('../some_folder/some_subfolder/'.$_REQUEST['f']);
exit;

This code will return ANY file as a download without showing where you actually store it.

You open this php-file via window.location.href = 'scripts/this_php_file.php?f=downloaded_file';

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I suggest you use the mousedown event, which is called BEFORE the click event. That way, the browser handles the click event naturally, which avoids any code weirdness:

(function ($) {




// with this solution, the browser handles the download link naturally (tested in chrome and firefox)
$(document).ready(function () {


var url = '/private/downloads/myfile123.pdf';
$("a").on('mousedown', function () {
$(this).attr("href", url);
});


});
})(jQuery);

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 var link=document.createElement('a');
document.body.appendChild(link);
link.href=url;
link.click();

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Using jQuery function

    var valFileDownloadPath = 'http//:'+'your url';


window.open(valFileDownloadPath , '_blank');

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You can do this with html5 very easily:

var link = document.createElement('a');
link.href = "/WWW/test.pdf";
link.download = "file_" + new Date() + ".pdf";
link.click();
link.remove();

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If somebody comes across this question looking for a way to force downloading an image for example. You could use a download attribute on your <a> tag for that.

<a href="/images/myw3schoolsimage.jpg" download>